Sharp DV-NC55M, DV-NC55U, DV-NC55C User Manual

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SERVICE MANUAL VCR/DVD COMBINATION MODEL

DV-NC55U/C/M

SERVICE MANUAL

S61U2DV-NC55U

VCR/D VD COMBINATION MODEL

REW PLAY

EJECT/ STOP

POWER

L(MONO)-AUDIO-RAV 2 IN VDEO

1. IMPORTANT SERVICE NOTES........................................................................................................ 2

2. FEATURES........................................................................................................................................ 4

3. SPECIFICATIONS ............................................................................................................................. 4

4. PART NAMES.................................................................................................................................... 6

MODELS DV-NC55U/C/M

5. MAINTENANCE CHECK ITEMS AND EXECUTION TIME ............................................................... 9

6. DISASSEMBLY METHOD ............................................................................................................... 10

7. OPERATION OF PICKUP ............................................................................................................... 14

8. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS ............................ 15

9. TEST MODE .................................................................................................................................... 38

10. TROUBLESHOOTING..................................................................................................................... 41

11. IC FUNCTION LIST ......................................................................................................................... 52

12. BLOCK DIAGRAMS......................................................................................................................... 76

13. SCHEMATIC DIAGRAMS................................................................................................................ 84

14. PRINTED WIRING BOARD ASSEMBLIES ................................................................................... 102

15. REPLACEMENT PARTS LIST ...................................................................................................... 123

16. PACKING OF THE SET................................................................................................................. 142

PLAY STOP

OPEN/

VCR DVD

STANDBY

CH(

TRACKING

)

(AV 1 )

D V-NC55C

D V-NC55U

MODELS

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified be used.

QSURROUND

CONTENTS

D V-NC55M

Page

SHARP CORPORATION

This document has been published to be used for after sales service only. The contents are subject to change without notice.

DV-NC55U/C/M

1. IMPORTANT SERVICE NOTES

BEFORE RETURNING THE VCR/DVD COMBINATION MODEL

Before returning the video cassette recorder to the user, perform the following safety checks.

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the VCR/DVD combination model.

2. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor/capacitor networks, mechanical insulators etc.

3. To be sure that no shock hazard exists, check for current in the following manner.

● Plug the AC line cord directly into a 120 volt AC outlet (Do not use an isolation transformer for this test).

● Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as a water pipe or conduit.

● Use an SSVM or VOM with 1000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor (See Diagram).

● Move the resistor connection to earth exposed metal part having a return path to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts,

etc.) and measure the AC voltage drop across the resistor. Reverse the AC plug on the set and repeat AC voltage measurements for each exposed part. Any reading of 0.45V rms (this corresponds to 0.3mA rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the VCR/DVD combination model to the owner.

SSVM

AC SCALE

1.5k ohms. 10W

0.15 µF

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

WARNING :TO REDUCE THE RISK OF FIRE OR ELEC-

TRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

CA UTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK. DO

CAUTION:

3.0A 125V

NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

This symbol warns the user of uninsulated voltage within the unit that can cause dangerous electric shocks.

This symbol alerts the user that there are important operating and maintenance instructions in the literature accompanying this unit.

This symbol mark means fast operating fuse. For continued protection against risk of fire, replace only with same type fuse F901 (3.0A, 125V).

1. NOTES DE SERVICE IMPORTANTES

AVANT DE RENDRE LE VCR/DVD MAGNETOSCOPE Avant de rendre le magnétoscope à l’utilisateur, effectuer

les vérifications de sécurité suivantes.

1. Vérifier toutes les gaines de fil pour être sûr que les fils ne sont pas pincés ou que le matériel n’est pas coincé entre le châssis et les autres pièces métalliques dans le VCR/DVD magnétoscope.

2. Vérifier tous les dispositifs de protection tels que les boutons de commande non métalliques, les matériaux d’isolement, le dos du coffret, les couvercles de compartiment et ajustement ou les boucliers, les réseaux de résistance / condensateur d’isolement, Ies isolateurs mécaniques, etc.

3. Pour être sûr qu’il n’y a aucun risque de choc électrique, vérifier le courant de fuite de la maniére suivante.

● Brancher le cordon d’alimentation secteur directement dans une prise de courant de 120 volts. (Ne pas utiliser de transformateur d’isolement pour cet essai).

● Utiliser deux fils à pinces et connecter une résistance de 10 watts 1,5 kohm en parallèle avec un condensateur de 0,15 µF en série avec des pièces du coffret métallique exposées et une masse de terre connue telle qu’un tuyau ou un conduit d’eau.

● Utiliser un VTVM ou VOM avec une sensibilité de 1000 ohms par volt ou plus ou mesurer la chute de tension CA entre la résistance (voir diagramme).

● Déposer la connexion de la résistance à toutes les

DV-NC55U/C/M

pièces métalliques exposées ayant un parcours de retour au châssis (connexions d’antenne, coffret métallique, tétes de vis, boutons et arbres de commande, etc.) et mesurer la chute de tension CA entre la résistance. Inverser la fiche CA (une fiche intermédiaire non polarisée doit être utilisée à seule fin de faire ces vérifications.) sur l’appareil et répéter les mesures de tension CA pour chaque piéce métallique exposée. Toute lecture de 0,45 Vrms (ceci correspond à 0,3 mArms CA) ou plus est excessive et signale un danger de choc qui doit être corrigé avant de rendre le VCR/DVD magnétoscope à son utilisateur.

VTVM

ECHELLE CA

1,5 KOHMS

10W

0,15 µF

SONDE D'ESSAI

VERS PIECES METALLIQUES EXPOSEES

CANNECTER A UNE MASSE DE TERRE CONNUE

ATTENTION: POUR REDUIRE LES RESQUES D'IN-

CENDIE OU DE CHOC ELECTRIQUE, NE PAS EXPOSER CET APPAREIL A LA PLUIE OU A L'HUMIDITE.

ATTENTION

RISQUE DE CHOC ELECTRIQUE

ATTENTION: AFIN DE REDUIRE LES RISQUES DE CHOC

ELECTRIQUE, NE PAS RETIRER LE COUVERCLE, AUCUN ORGANE INTERNE NE PEUT ETRE REPARE PAR L'UTILISATEUR. CONFIER L'APPAREIL A UN DEPANNEUR QUALIFIE.

Ce symbole signale à l'utilisateur la présence d'une tension non isolée à l'intérieur de l'appareil qui peut être la cause de secousses électriques dangereuses.

Ce symbole avertit l'utilisateur que des instructions importantes relatives à l'utilisation et àl'entretien se trouvent dans le manuel accompagnant l'appareil.

PRECAUTION:

Cette marque indique le fusible à action in stantansée. Pour la protection continue contre le risque d'incendie,

3,0A 125V

ne remplacer que par le fusible type F901 (3,0A, 125V).

NE PAS OUVRIR

DV-NC55U/C/M

2. FEATURES

ËË

Ë Common Features

ËË

• A DVD, CD player and VCR all in one.

• Simultaneous VCR recording and DVD playback.

ËË

Ë VCR

ËË

• Hi-Fi Stereo Sound/Double-Azimuth 4-Heads

• Built-in MTS (Multi-channel TV Sound) Decoder

• 400 Times Rewind Speed to Fast Forward and Rewind.

• EZ Set Up (Auto Channel/Clock Set Up)

• S-VHS Quasi Playback

• 19µ Clear Picture System (in EP mode)

• Simple Recording Timer

• Sharp Super Picture

• Exact Rec/Tape Remaining

ËË

Ë DVD

ËË

• Plays DVD, CD (Digital Audio) discs as well as CD-R/CD-RW discs recorded in MP3 file format

• Virtual Dolby Surround (QSURROUND*1) provides high-quality surround sound

• Digital Gamma correction and Digital Super Picture functions

• Dolby Digital*2/DTS*3 digital out capability

• High-quality digital images

• High-quality digital sound

*1QSURROUNDTM is a trademark of QSound Labs, Inc. *2Manufactured under license from Dolby Laboratories. "Dolby", "Pro Logic" and the double-D symbol are trademarks of

Dolby Laboratories.

*3"DTS" and "DTS Digital Surround" are trademarks of Digital Theater Systems, Inc.

3. SPECIFICATIONS

Signal System: NTSC

INPUT/OUTPUT JACKS

DVD/VCR shared output jacks: VIDEO jack: RCA Pin-jack

AUDIO jack: RCA Pin-jack

DVD output jacks: VIDEO jack: S-Video jack

AUDIO jack: RCA Pin-jack DIGITAL AUDIO IF: Coaxial digital AUDIO output jack: RCA Pin-jack

VIDEO input jacks: VIDEO jack: RCA Pin-jack

AUDIO jack: RCA Pin-jack

VCR

Video Recording System: Rotary Two-Head Helical Scanning

Number of Video Heads: 4

Video Signal Standard: NTSC Color System

Audio Recording System: 1 Stationary Head for Linear Audio

2 Rotary Heads for Hi-Fi stereo

Tape Width: 12.7 mm (1/2 inch)

Tape Speed: (SP) 33.35 mm/sec (1.31 i.p.s.)

(LP) 16.67 mm/sec (0.66 i.p.s.) (playback only) (EP) 11.12 mm/sec (0.44 i.p.s.)

Maximum Recording Time: (SP) 160 min (T-160)

(EP) 480 min (T-160)

Channel Coverage: VHF 2-13

UHF 14-69 CATV 1-125

Antenna Input: 75Ω

Video Input: Input level: 0.5 to 2.0 Vp-p (75Ω) Video Output: Output level: 1.0 Vp-p (75Ω) Audio Output: Input level: –8 dBs (47kΩ)

(0 dBs = 0.775 Vrms)

Audio Output: Output level: –8 dBs (1kΩ)

(0 dBs = 0.775 Vrms)

Hi-Fi Audio: Dynamic Range: 90 dB

Frequency Response: 20 Hz-20 kHz

Memory Backup: 60 seconds

DVD

DVD/VCR shared Video output: Output level: 1 Vp-p (75Ω)

S video output: Y output level: 1 Vp-p (75Ω)

C output level: 0.286 Vp-p (75Ω)

Audio output: Output level: 2 Vrms (1 kHz, 0 dB)

Video signal horizontal resolution: 500 lines

S/N ratio: 60 dB

Audio signal frequency characteristics: For DVD linear PCM playback:

4 Hz to 22 kHz (48 kHz sampling) 4 Hz to 44 kHz (96 kHz sampling) CD playback: 4 Hz to 20 kHz (JEITA)

S/N ratio: CD: 100 dB, 1 kHz (EIAJ)

Dynamic range: DVD linear PCM: 96 dB

CD: 96 dB (JEITA)

Total harmonic distortion ratio: CD: 0.006% (JEITA)

Pickup: Wave length: 650 nm

Laser output: Max. 0.7 mW

DV-NC55U/C/M

Operating temperature: 5°C to 35°C (41°F to 95°F)

Storage temperature: –20°C to 55°C (–4°F to 131°F)

Power supply: 120 V AC, 60 Hz

Power consumption: 30 W

Dimensions: 430 mm × 99 mm × 346.5 mm (W × H × D)

(including attachments) (16 15/16" × 3 29/32" × 13 21/32")

Weight: 5.1 kg (11.3 lbs)

Specifications are subject to change without notice. Weight and dimensions are approximate.

3-1. ACCESSORIES

Accessories: Remote Control Unit x 1, Battery x 2, VIDEO/AUDIO Cable x 1, 75 Ohm Coaxial Cable x 1

DV-NC55U/C/M

VCR Main Unit (Front)

REW PLAY

STANDBY

CH(

TRACKING

)

POWER

EJECT/ STOP

PLAY STOP

OPEN/

VCR DVD

(AV 1 )

L(MONO)-AUDIO-RAV 2 IN VDEO

TIMER

REC

VCR SPEP

CH / , TRACKING

POWER

PLA Y

EJECT/STOP

Clock Indicator

Channel Indicator

Tape Counter Indicator

REW

Front AUDIO/

VIDEO input

jack

Cassette-in

Indicator

Timer Recording

Indicator

Tape Speeds

Indicator

VCR Mode

Indicator

Operation status

Indicator

Cassette compartment

VCR Front Panel Display

DVD Main Unit (Front)

DVD Front Panel Display

REW PLAY

STANDBY

CH(

TRACKING

)

POWER

EJECT/ STOP

PLAY STOP

OPEN/

VCR DVD

(AV 1 )

L(MONO)-AUDIO-RAV 2 IN VDEO

Disc tray

OPEN/CLOSEPOWER

TITLE

indicator

Operation status/Time indicator

TRACK

indicator

CHAPTER

indicator

Disc operation buttons

(PLA Y, STOP)

PROGRAM indicator

REPEAT indicator

ANGLE indicator

VIRTUAL surround

indicator

DVD Output indicator

VCR DVD

indicator

You can toggle between 1 and 2 by

pressing the remote control unit’s

DISPLAY button .

4. PART NAMES

DV-NC55U/C/M

REV FWD

PLAY

STOP

100

OPEN/

VCR/DVD

SELECTOR

VCR MENU

DVD SETUP

TAPE

SPEED

SCREEN

TITLE

DVD MENU

DISPLAY

FUNCTION

CONTROL

PROGRAM ZOOM

CANCEL

RETURN

POWER

ON/OFF

TV/ VCR EJECT

SET

ENTER

ZERO BACK

SKIP SEARCH

REPLAY

VCR DVDAM/PM INPUT

PAUSE/STILL

REC

SLOW

VCR DVD

SKIP

DPSS

AUDIO

OUTPUT

VCR/DVD COMBINATION

ON SCREEN

TIMER ON/OFF

POWER

DISPLAY

CANCEL

CURSOR ( / / / )

Number buttons

100, AM/PM

PLAY

REV

REC

STOP

TAPE SPEED

VCR/DVD CHANGE Switch

TV/VCR

VCR/DVD SELECTOR

EJECT

VCR MENU

SET

ZERO BACK

SKIP

REPLAY

VCR DVD

PAUSE/STILL

SLOW

±

—

, DPSS

±

—

INPUT

SLOW

AUDIO OUTPUT

CH /

Remote Control Unit (VCR Operation Buttons)

• The explanations on this page use the VCR/DVD CHANGE Switch in the VCR position.

Loading the

Open the battery cover

by pulling the lid in the

direction of the arrow.

Load the batteries.

Load the two batteries (R6 UM/SUM-3 or AA)

supplied with the remote control unit so that

the battery poles

and are positioned

as indicated.

Close the battery cover

by lowering the lid in the

direction of the arrow.

• Do not subject the remote control unit to shock, water or excessive humidity.

• The remote control unit may not function if the Unit sensor is in direct sunlight or any other strong light.

• Incorrect use of batteries may cause them to leak or burst. Read the battery warnings and use the batteries properly.

• Do not mix old and new batteries, or mix brands in use.

• Remove the batteries if you do not use the remote control unit for an extended period of time.

Remote Control Unit (DVD Operation Buttons)

• The explanations on this page use the VCR/DVD CHANGE Switch in the DVD position.

REV FWD

PLAY

STOP

100

OPEN/

VCR/DVD

SELECTOR

VCR MENU

DVD SETUP

TAPE

SPEED

SCREEN

TITLE

DVD MENU

DISPLAY

FUNCTION

CONTROL

PROGRAM ZOOM

CANCEL

RETURN

POWER

TIMER

TV/ VCR EJECT

SET

ENTER

ZERO BACK

SKIP SEARCH

REPLAY

VCR DVDAM/PM INPUT

PAUSE/STILL

REC

SLOW

VCR DVD

SKIP

DPSS

AUDIO

OUTPUT

VCR/DVD COMBINATION

ON SCREEN

POWER

DISPLAY

FUNCTION CONTROL

RETURN

TITLE

CURSOR ( / / / )

Number buttons

REV

STOP

VCR/DVD SELECTOR

REPEAT, PROGRAM

ZOOM

PLAY

DVD MENU

OPEN/CLOSE

DVD SETUP

ENTER

PAUSE/STILL

FWD

SLOW

VCR/DVD CHANGE Switch

SKIP

DV-NC55U/C/M

Main Unit (Rear)

DVD OUT

AV 2 OUT

DIGITAL

AUDIO

S-VIDEO

DVD/VCR

AV 1 OUT

AUDIO

VIDEO

VCR

AV 1 IN

AUDIO

(

MONO

)

VIDEO

IN FROM

ANTENNA

UHF/VHF

CATV

OUT TO TV

OUTPUT

CHANNEL

DVD OUT

AV 2 OUT

DIGITAL

AUDIO

S-VIDEO

DVD/VCR

AV 1 OUT

AUDIO

VIDEO

VCR

AV 1 IN

AUDIO

VIDEO

IN FROM

ANTENNA

UHF/VHF

CATV

OUT TO TV

OUTPUT

CHANNEL

(

MONO

)

VCR AUDIO input jacks

ANTENA IN (antena or

cable input)

VCR VIDEO input jack

ANTENA OUT

3 4 OUTPUT

CHANNEL select

DVD/VCR shared AUDIO

output jacks

DVD Coaxial DIGITAL

output jack

DVD S-VIDEO output jack

DVD AUDIO output jacks

DVD/VCR shared VIDEO

output jack

To an AC outlet

5. MAINTENANCE CHECK ITEMS AND EXECUTION TIME

MECHANICAL PARTS REGUIRING PERIODICAL INSPECTION

Use the following table as a guide to maintain the mechanical parts in good operating condition.

DV-NC55U/C/M

Parts

Pickup Spindle Unit Sled Motor Loading Motor Belt

Note : Part Replacement

: Cleaning (For cleaning, use a lint-free cloth danpened with pure isopropyl alcohol.)

Maintained

1,000 hrs.

2,000 hrs.

CARES WHEN USING THE PICKUP

1. The laser light having wavelength 650 nm is emitted from the objective lens. BE CAREFUL SO THAT THE LASER LIGHT DOES NOT ENTER DIRECTLY INTO YOUR EYE.

2. The semiconductor laser may be easily damaged by electrostatic charges. When handling the pickup, take care so that the electrostatic charge is not generated.

3. The semiconductor laser may be easily damaged by overcurrent. Use the power supply unit which does not give any spike current when the power is turned on and off.

4. Carefully remove the dust and dirt from the objective lens with the lens blower. When handling the objective lens, take due care so that it is not contaminated with fingerprint, etc. If the objective lens is contaminated, impregnate the cleaning paper with a small quantity of solvent (isopropyl alcohol), and gently wipe to clean.

5. The ozone layer depleting components (ODC) are not used in the production process for the product.

DV-NC55U/C/M

6. DISASSEMBLY METHOD

6-1. DISASSEMBLY METHOD

1)Removing the cabinet. (1) Remove the five screws 1 and 2.

2)Removing the front panel. (1) Remove the earth plate. (2) Remove the three screws 3. (3) Remove the three hooks 4.

3)Removing the front PWB. (1) Remove the shild plate. (2) Remove the four FFCs 5 and 6. (3) Release the two hooks 7 and tilt the PWB toward you to

remove it.

(4) Release the two hooks 8 and tilt the PWB toward you to

remove it.

4)Removing the DVD mechanism. (1) Remove the six screws 9. (2) Remove the DVD REINF. angle 0. (3) Remove the connector q. (4) Remove the two FFCs w.

Shild Plate

(5) Peel the FFC w off the DVD mechanism. (6) Remove the FFC r. (7) Remove the shield (lower) t. (8) Remove the two FFCs y, and at two connectors u, and

at four screws i. (9) Remove the wire from the wire holder o. (10)Remove the DVD main PWB p. (11)Remove the FFC cover a. (12)Remove the two interface PWB holders s, and remove

the interface PWB d. (13)Remove the two screws f.

(14)Remove the connector.

(15)Remove the three screws g and h.

DV-NC55U/C/M

Connector

5)Removing the cassette housing control/VTR mechanism. (1) Remove the two screws k. (2) Remove the two screws l. (3) Remove the one screw ;. (4) Remove the H/A shield case (upper) .

6)Removing the terminal plate/VTR main PWB. (1) Remove the four screws . (2) Remove the one screw .

7)Removing the bottom plate. (1) Remove the six screws .

DV-NC55U/C/M

6-2. EXTENSION CABLE USE POINT (FOUR PLACES)

Parts Code Price Code Name/Description

QCNW-8570GEZZ AV Extension cable (FFC), 29pin 500mm

DVD main CN801–I/F CN8202

QCNW-8571GEZZ AN Extension cable (wire), 9pin 500mm

DVD main CN201–power P9001

QCNW-8601AJZZ AE Extension cable (FFC), 23pin

I/F CN8203–DVD display CN5001

QCNW-8605AJZZ AE Extension cable(FFC), 9pin

DVD main CN802– AV CN2005

Extension Cable Diagram

Tuner

CN2005

Power PWB

Audio/Video PWB

VTR Main PWB

VTR Mechanism

CN8203

VTR Display PWB DVD Display PWB

Interface PWB

CN8202

P9001

CN5001

QCNW-8601AJZZ 23pin

DVD Mechanism

QCNW-8571GEZZ 9pin

CN201

DVD main PWB

CN802

CN801

QCNW-8570GEZZ 29pin

QCNW-8605AJZZ 9pin

DV-NC55U/C/M

6-3. REPLACEMENT OF MAIN PARTS

1. Remove the mechanism with angle from the set (refer to 35 on page 140).

2. It is in such cases as the thin driver, and it is pushed in slowly, and a tray is drawn in the arrow direction the slide rack on the

left of the base chassis.

3. Take out disk.

Front Side

1. After setting the mechanism chassis to the angle state, ground it to prevent the electrostatic discharge damage of the pickup .

2. Remove S and the DVD shield (lower) 56 (refer to the illustration on page 140).

3. Remove P , Q , Z and R 83 from the DVD main PWB unit 68 , and loosen the 4 screws 45 to remove the DVD main PWB

unit 68 . (Pickup relay FFC 74 isn't removed.) (refer to the illustration on page 140)

4. Remove screws fixing the base chassis (located at the back right and at front left when facing the set).

5. With the pickup FFC connected, turn over the base chassis and short (solder) two short lands on the pickup interface PWB in

order to prevent the electrostatic discharge damage of the pickup.

6. Remove the pickup FFC from the main PWB.

7. Remove the pickup FFC from the pickup interface PWB.

8. Remove the traverse mounting screws to remove the traverse chassis ass'y.

Note: After assembly and wiring, remove the solder joint of the short land. If short-circuited, a disk is not played back.

Pickup FFC

Traverse Fixing Screw

Sled Motor Lead Wire

Loading Motor Lead Wire

Since the pickup optical axis and turntable inclination of DVD are adjusted with higher accuracy than of CD/MD, make a replacement as a mechanism service chassis ass'y (refer to Parts List).

Pickup interface PWB

Pickup FFC

Short Land

DV-NC55U/C/M

2-focus objective lens

Actuator assembly

7. OPERATION OF PICKUP

7-1. CIRCUIT CONFIGURATION OF PICKUP

The pickup unit reads signals from the disk, and the flexible cable is connected to the board. The following signals flow through the cable.

7-2. EQUIVALENT CIRCUIT OF PICKUP

FO+ TR– TR+

OSC

FO–

LD PD VA

– +

ref

V Vcc

GND

Power adjust

ACTUATOR

HIGH-FREQUENCY CONVOLUTION

HOLOGRAM LASER UNIT

TR–

FO+

TR+

FO–

GND

(NC)

GND

ref(VCC/2)

GND

7-3. POLARITIES OF SIGNAL

Focus When electric current is flowed

FO+, FO- from FO+ to FO-, the lens comes

to near the disk.

Tracking When electric current is flowed

TR+, TR- from TR+ to TR-, the lens goes

toward the outer circumference.

7-4. SIGNALS OF PICKUP

7-4-1. Tracking drive signal (TR+, TR-)

The signal drives the tracking servo mechanism which projects the beam on the track by moving the objective lens (OL) to the outer or inner circumference (at a right angle against the track) of the disk.

7-4-2. Focus drive signal (FO+, FO-)

The signal drives the focus servo mechanism which aligns the focus on the pit of the disk by elevating OL (vertically against the disk surface.)

The VR terminal is connected to GND.

7-4-3. Monitor Diode (PD)

Since the laser diode largely varies output of the laser light even if the flowing current is slightly varied, the projection light is detected with the monitor diode to control the laser light to be equally output. Since the current varies on the monitor diode according to the intensity of the received light of the laser diode, the drive current of the laser diode is reduced if the current of the monitor diode increases. On the contrary, the drive current of the laser diode is increased if the current of the monitor diode decreases. As the projection light of the laser diode becomes stronger, the current of the monitor diode increases to increase the current which flows into the monitor diode output (PD). This is input to the pin 44 of IC301 and is compared with the reference voltage to control the drive current of the laser diode. The circuit is called ALPC (Automatic Laser Power Control).

When the quantity of laser light increases, the current shown in figure increases and the PD terminal voltage rises.

7-4-4. Laser diode drive current control (LD)

Power supply to drive the laser diode

IC301 is used to control. The LD terminal voltage lowers, and the quantity of light reduces. (IC301 is actuated by voltage input.)

7-4-5. High-frequency convolution module power supply (VOSC)

The high-frequency convolution imposes the high-frequency signal on the DC current to impose the high frequency on the drive current of the laser. Thus, the interference of outgoing light and reflected light is prevented.

7-4-6. HF Signal (VA, VB, VC, VD)

Signals recorded in the disk

DV-NC55U/C/M

8. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS

The explanation given below relates to the on-site general service (field service) but it does not relates to the adjustment and replacement which need high-grade equipment, jigs and skill. For example, the drum assembling, replacement and adjustment service must be performed by the person who have finished the technical courses.

8-1. MECHANISM CONFIRMATION ADJUSTMENT JIG

So as to perform completely the mechanism adjustment prepare the following special jigs. So as to maintain the initial performance of the machine the maintenance and check are necessary. Utmost care must be taken so that the tape is not damaged. If adjustment needs any jig, be sure to use the required jig.

No. Jig ltem Part No. Code Configuration Remarks

This cassette torque meter is used for check-

1. Torque Cassette Meter JiGVHT-063 CZ

JiGTG0090 CM

Torque Gauge

JiGTG1200 CN

3. Torque Gauge Head JiGTH0006 AW

ing and adjusting the torque of take-up for measuring tape back tension.

These Jigs are used for checking and adjusting the torque of take-up and supply reel disks.

4. Torque Driver JiGTD1200 CB

Master Plane Jig and Reel Disk Height

5. Adjusting Jig

JiGRH0002 BR JiGMP0001 BY JiGSG2000 BS

Tension Gauge

JiGSG0300 BF

Pinch pressing force

7. JiGADP0003 BK

measuring jig

Reverse guide height

adjustment box driver

Alignment Tape

JiGDRiVER11055

VROATSV CD

VROEFZCS BG

VROEFZHS BH

When fixing any part to the threaded hole using resin with screw, use the jig. (Specified torque 5 kg)

These Jigs are used for checking and adjusting the reel disk height.

There are two gauges used for the tension measurements, 300 g and

2.0 kg. This Jig is used with the tension

gauge. Rotary transformer clearance adjusting jig.

This Jig is used for height adjustment of the reverse guide (for reverse guide height adjustment).

These tapes are especially used for electrical fine adjustment.

Video Audio HiFi Audio Track 525 Monoscope 7k — 58µm NTSC Color Bar 1k — 58µm

Black Level (only SYNC) signal

—19µm

2.3k

Guide roller height

10. JiGDRiVERH-4 AP

adjustment driver

X value adjustment

11. JiGDRiVER-6 BM

gear driver Reverse Guide Height

12. JiGRVGH-F18 BU Adjusting Jig

This screwdriver is used for adjusting the guide roller height.

For X value adjustment

This Jig is used for height adjustment of the reverse guide.

DV-NC55U/C/M

8-2. MAINTENANCE CHECK ITEMS AND EXECUTION TIME

Perform the maintenance with the regular intervals as follows so as to maintain the quality of machine.

Parts

Guide roller ass’y

Maintained

500 hrs.

1000 hrs.

1500 hrs.

2000 hrs.

Possible symptom

encountered

Remarks

Abnormal rotation or significant vibration requires replacement.

Sup guide shaft Reverse guide Slant pole on pole base Full erase head A/C head

Upper and lower drum ass’y

Capstan D.D. motor Pinch roller

Reel belt

Tension band ass’y Loading motor

Idler ass’y Limiter pulley

Lateral noises Head occasionally blocked

Color and beating Small sound or sound

distortion Poor S/N ratio, no color

Poor flatness of the envelope with alignment tape

No tape running, uneven color

No tape running, tape slack

No tape running, tape slack, no fast forward/ rewind motion

Screen swaying Cassette not loaded or

unloaded No tape running, tape

slack

Clean tape contact part with the specified cleaning liquid.

Clean tape contact area with the specified cleaning liquid.

Clean rubber and rubber contact area with the specified cleaning liquid.

Supply/take-up main brake levers

Tape slack

Replace the roller of the cleaner

AHC (Automatic head cleaner)

when it wears down. Just change the AHC roller assembly for new one.

NOTE : Part replacement. : Cleaning : Apply grease <Specified> Cleaning liquid Industrial ethyl alcohol

* This mechanism does not need electric adjustment with variable resistor. Check parts. If any deviation is found,

clean or replace parts.

Video head cleaning procedure

1. Apply one drop of cleaning liquid to the cleaning paper with the baby oiler.

2. Gently press the cleaning paper against the video head to fix your finger, and move the upper drum so that each head is passed to and fro 5 times (do not move the cleaning paper).

3. Wipe with the dry cleaning paper.

Notes :

• Use the commercially available ethanol of Class 1 as cleaning liquid.

• Since the video head may be damaged, do not move up and down the cleaning paper.

Gently press the cleaning paper to fix with your finger, and rotate the upper drum to clean. Move to and fro 5 times for each head. (Do not move the cleaning paper.)

Rotate the upper drum with one hand.

• Whenever the video head is cleaned, replace the cleaning paper.

• Do not apply this procedure for the parts other than the video head.

Parts Code Description Code ZPAPRA56-001E Cleaning Paper AW ZOiLR-02-24TE Babe Oiler (Spoit) AH

8-3. FUNCTION OF MAJOR MECHANICAL PARTS (TOP VIEW)

DV-NC55U/C/M

No. Function

1 Full erase head 2 Supply pole base ass’y 3 Tension arm 4 Idler wheel ass’y 5 Pinch drive lever ass’y 6 Supply reel disk 7 Supply main brake

No. Function

8 Take-up main brake

9 Pinch drive cam 10 A/C head ass’y 11 Reverse guide lever ass’y 12 Casecon drive gear 13 Take-up reel disk 14 Pinch roller lever ass’y

DV-NC55U/C/M

FUNCTION OF MAJOR MECHANICAL PARTS (BOTTOM VIEW)

19 20

No. Function

15 Upper and lower drum ass’y 16 Loading motor 17 Drum drive motor 18 Take-up pole base ass’y 19 Slow brake lever 20 Master cam 21 Capstan D.D. motor

No. Function

22 Reel belt 23 Clutch lever 24 Limiter pulley ass’y 26 Shifter

8-4. DISASSEMBLING THE MECHANISM/MAIN PWB ASSEMBLY

DV-NC55U/C/M

1. When removing the mechanism from the main PWB. Remove the PWB bottom plate 1 screw 1. Remove the FFC cable (AA, AD, AH) 2 which connect-

ing the PWB and the mechanism.

Take out vertically the mechanism so that it does not

damage the adjacent parts.

MECHANISM CHASSIS

CASSETTE HOUSING

Tuner

2. Removing the mechanism and cassette housing. Remove 2 screws 3 fixing the cassette housing to the mechanism, and remove the cassette housing.

AUDIO/VIDEO PWB

MAIN PWB

DV-NC55U/C/M

AUDIO/VIDEO PWB

MAIN PWB

START SENSOR

END SENSOR

REC TIP SW

TUNER

8-5. CARES WHEN REASSEMBLING

INSTALLING THE CASSETTE HOUSING

When the cassette housing is installed on the mechanism, the initial setting is essential condition. There are two initial setting methods, namely electrical and mechanical.

1. Electrical initial setting

So as to perform initial setting of mechanism execute the Step 1 of Installation of cassette housing. After ascertaining the return to the initial setting position (*1) install the

Pulley feed gear

Screwdriver

Tilt mark (*1)

INSTALLING THE MECHANISM ON PWB

Lower vertically the mechanism, paying attention to the mechanism edge, and install the mechanism with due care so that the parts are not damaged. So as to fix the mechanism to the main PWB install 1 screw 1. For other, fix the vicinity of loading motor and solder joint side of main PWB.) Connect again the FFC cable (AA-MH, AD-ME, AH-MH) between the mechanism and the main PWB.

cassette housing. (Conditions: When mechanism and PWB have been installed)

2. Mechanical initial setting

Feed the pulley feed gear of loading motor with screw driver. After ascertaining the return to the initial set position (*1) install the cassette housing in the specified position. (This method is applied only for the mechanism.)

Casecon drive gear

Drive angle of cassette housing

PARTS WHICH NEED PARTICULAR CARE

When installing the mechanism chassis on the PWB unit, take care so as to prevent deformation due to contact of mechanism chassis with REC TIP SW.

DV-NC55U/C/M

8-6.REMOVING AND INSTALLING THE CAS-

SETTE HOUSING

• Removal

1. In the cassette removing mode, remove the cassette.

2. Unplug the power cord.

3. Remove in the following numerical order. a) Remove two screws 1. b) Slide and pull up the cassette housing control.

Cassette housing control

Notes:

1. When fitting the S/E sensor holder to the cassette controller frame L/R, take care.

2. Misengagement of teeth of casecon drive gear and drive angle gear causes malfunction. (The cassette cannot be set, load and ejection are repeated).

3. In the case when you use the magnet screw driver, never approach the magnet driver to the A/C head, FE head, and drum.

4. When installing or removing, take care so that the cassette housing control and tool do not contact the guide pin or drum.

5. After installing the cassette housing control once perform cassette loading operation.

8-7.TO RUN A TAPE WITHOUT THE CASSETTE

HOUSING CONTROL ASSEMBLY

1. Remove the full-surface panel.

2. Short-circuit between TP5102 and TP5103.

3. Plug in the power cord.

4. Turn off the power switch.

(The pole bases move into U.L.position.)

5. Open the lid of a cassette tape by hand.

6. Hold the lid with two pieces of vinyl tape.

7. Set the cassette tape in the mechanism chassis.

8. Stabilize the cassette tape with a weight (500g) to

prevent floating.

9. Turn on the power switch.

10. Perform running test.

Figure 8-1.

• Reassembly

1. Before installing the cassette housing control, shortcircuit between TP5102 and TP5103 provided goes left at VTR display PWB, press the eject button. The casecon drive gear turns and stops when the positioning mark appears. Engage two teeth of casecon drive gear with the three teeth of casecon drive angle gear, and set on the mechanism chassis as shown below.

Casecon drive gear

Casecon drive angle gear

Figure 8-2.

500g

Weight to prevent float (500g)

Mechanism chassis

Figure 8-3.

Note:

The weight should not be more than 500g. To take out the cassette tape.

1. Turn off the power switch.

2. Take out the cassette tape.

2. Install in the reverse order of removal. Power source plug is pulled out after the mounted completion, and it comes.

DV-NC55U/C/M

8-8.REEL DISK REPLACEMENT AND HEIGHT

CHECK

• Removal

1. Remove the cassette housing control assembly.

2. Pull the tension band out of the tension arm ass'y.

3. Remove the Supply/Take-up main brake ass'y.

4. Open the hook at the top of the reel disk, and remove the reel disk.

Note:

Take care so that the tension band ass'y and main brake ass'y (especially soft brake) are not deformed.

Tension arm ass'y

Supply main brake ass'y

Tension band ass'y

Supply reel disk

Take-up main brake ass'y

Take-up reel disk

Notes:

1. When installing the reel disk, take due care so that the tension band ass'y is not deformed and grease does no adhere.

2. Do not damage the Supply main brake ass'y. Be careful so that grease does not adhere to the brake surface.

• Reassembly (Take-up reel disk)

1. Clean the reel disk shaft and apply grease (SC-141) to it.

2. Align the phase of the reel disk to that of the reel relay gear and to install a new take-up reel disk onto the shaft.

3. Check the reel disk height and reassemble the take-up main brake ass'y.

Note:

1. Take care so that the Take-up main brake ass'y is not damaged. Take care so that grease does not adhere the brake surface.

2. After reassembly, check the video search rewind back tension (see 8-13), and check the brake torque (see 8-

17).

• Height checking and adjustment Note:

1. Set the master plane with due care so that it does not contact the drum.

2. When putting the master plane, shift the reverse guide a little in the loading direction. Care must be taken since excessive shift results in damage.

Figure 8-4.

Note:

When the tension band ass'y is pressed in the direction of the arrow for removal, the catch is hard to be deformed.

Figure 8-5.

• Reassembly (Supply reel disk)

1. Clean the reel disk shaft and apply grease (SC-141) to it.

2. Match the phases of reel disk and reel relay gear, and set the new reel disk.

3. After checking the reel disk height, wind the tension band ass'y around the reel disk, and insert into the hole of tension arm ass'y.

4. Assemble the Supply main brake ass'y.

Master plane

Reverse guide

Supply reel disk

Cassette lock release shaft

Take-up reel disk

Position pin

Figure 8-6.

Note:

1. Check that the reel disk is lower than part A but higher than part B. If the height is not correct, readjust the reel disk height by changing the poly-slider washer under the reel disk.

DV-NC55U/C/M

2. Whenever replacing the reel disk, perform the height checking and adjustment.

Master plane

10 ± 0.2mm

Reel disk

Reel disk height adjusting jig

Mechanism chassis

Figure 8-7.

8-9. CHECKING AND ADJUSTMENT OF TAKE-

UP TORQUE IN FAST FORWARD MODE

• Remove the cassette housing control assembly.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Setting

1. Set a torque gauge to zero on the scale. Place it on the take-up reel disk.

2. Press the FF button.

3. To calculate the remaining capacity of the play back mode, slowly rotate the supply reel disk, and then shift it into the forward mode.

• Checking

1. Turn the torque gauge slowly (one rotation every 2 to 3 seconds) by hand in the CW direction.

2. Make sure that the indication of torque gauge is not less than 30mN·m (306gf·cm).

Torque gauge

Notes:

1. Hold the torque gauge by hand so that it is not moved.

2. Do not keep the reel disk in lock state. Do not allow longtime measurement.

8-10.CHECKING AND ADJUSTMENT OF TAKE-

UP TORQUE IN REWIND MODE

• Remove the cassette housing control assembly.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Setting

1. Set a torque gauge to zero on the scale. Place it on the supply reel disk.

2. Press the rewind button.

3. To calculate the remaining capacity, slowly rotate the take-up reel disk, and then shift it into the rewind mode.

• Checking

1. Turn the torque gauge slowly (one rotation every 2 to 3 seconds) by hand in the CCW direction.

2. Make sure that the indication of torque gauge is not less than 30mN·m (306gf·cm).

Torque gauge

30mN·m (306gf·cm) or more

CCW

The gauge is held at its maximum value. (Red mark)

30mN·m (306gf·cm) or more

Idler ass'y

The gauge is held at its maximum value. (Red mark)

Figure 8-8.

• Adjustment

1. If the FF winding-up torque is less than the specified value, clean the capstan D.D. motor pulley, drive belt, and limiter pulley with cleaning liquid, and check again.

2. If the torque is less than the set value, replace the reel belt.

Supply reel disk

Idler ass'y

Figure 8-9.

• Adjustment

1. If the rewind winding-up torque is less than the specified value, clean the capstan D.D. motor pulley, drive belt, and limiter pulley with cleaning liquid, rewind again, and check the winding-up torque.

2. If the winding-up torque is still out of range, replace the drive belt.

DV-NC55U/C/M

Notes:

1. Hold the torque gauge by hand so that it is not moved.

2. Do not keep the reel disk in lock state. Do not allow longtime measurement.

8-11.CHECKING AND ADJUSTMENT OF

TAKE-UP TORQUE IN RECORD/ PLAYBACK MODE

• Remove the cassette housing control assembly.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Turn off the power switch.

• Open the cassette torque meter lid, and fix it with tape.

• Load the cassette torque meter into the unit.

• Put the weight (500g) on the cassette torque meter.

• Turn on the power switch.

• Press the picture record button, and set EP picture record mode (x3).

Set value EP6.9 ± 2.5mN⋅m (70 ± 25gf⋅cm)

8-12.CHECKING AND ADJUSTMENT OF TAKE-

UP TORQUE IN VIDEO SEARCH REWIND MODE

• Remove the cassette housing control assembly.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Setting

Press the playback button and rewind button to set the video search rewinding mode.

• Checking

Place the torque gauge on the supply reel disk, and turn it counterclockwise very slowly (one rotation every 1 to 2 seconds) and check that the torque is within the set value

14.0 ± 3.9mN⋅m. (144 ± 40gf⋅cm)

Torque gauge

CCW

500g

Cassette torque meter

Figure 8-10.

• Checking

1. Make sure that value is within the setting 6.9 ± 2.5mN·m (70 ± 25gf·cm).

2. The winding-up torque fluctuates due to variation of rotation torque of limiter pulley ass'y. Read the center value of fluctuation as setting.

3. Set the EP record mode (x3) and make sure that the winding-up torque is within setting.

• Adjustment

If the playback winding-up torque is not within the setting, replace the limiter pulley assembly.

Note:

When the torque cassette is set, put a weight (500g) to prevent rise. When the cassette torque meter is taken out. Turn off the power switch.

Supply reel disk

Figure 8-11.

Note:

Surely put the torque gauge on the reel disk to measure. If the torque gauge is raised, accurate measurement is impossible.

• Adjustment

If the rewinding playback winding-up torque is not within the setting, replace the limiter pulley assembly.

Note:

The winding-up torque fluctuates due to variation of rotation torque of supply reel disk. Read the center value of fluctuation as setting.

8-13.CHECKING THE VIDEO SEARCH REWIND

BACK TENSION

• Remove the cassette housing control assembly.

DV-NC55U/C/M

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Checking

1. After pressing the play button, press the rewind button, and set the video search rewind mode.

2. Place the torque gauge on the take-up reel disk, and turn it counterclockwise very slowly (one rotation every 2 to 3 seconds) and check that the torque is within the set value 3.4 ± 1.5mN⋅m (35 ± 15gf⋅cm).

Torque gauge

CCW

Take-up reel disk

Pinch roller

Capstan shaft

Tension gauge adapter

Tension gauge 900 - 1,200gf

Figure 8-13.

1. Detach the pinch roller from the capstan shaft. Do not separate excessively. Or the pinch lever and pinch double action lever may disengage.

2. Engage the tension gauge adapter with the pinch roller shaft, and pull in the arrow direction.

3. Gradually return the pinch roller, and measure the pulling force when the pinch roller contacts the capstan shaft.

4. Make sure that the measured value is within setting 9.0 N to 11.8 N (900 to 1,200gf).

Figure 8-12.

Notes:

Set the torque gauge securely on the take-up reel disk. If it is not secure, the measurement will be incorrect.

8-14.CHECKING THE PINCH ROLLER

PRESSURE

• Remove the cassette housing control assembly.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Checking

Press the play button to set the playback mode.

8-15.CHECKING AND ADJUSTMENT OF

TENSION POLE POSITION

• Remove the cassette housing control assembly.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Turn off the power switch.

• Setting

1. Open the cassette tape (T-120), and fix with tape.

2. Set the cassette tape in loading state.

3. Put the weight (500g) on the cassette tape.

4. Turn on the power switch.

5. Make the adjustment with the beginning of a T-120 tape.

(T-120)

500g

Weight to prevent float (500g)

Figure 8-14.

DV-NC55U/C/M

• Checking

1. Set a cassette tape, push the REC button to place the unit in the SP record mode. Now check the tension pole position.

2. Visually check to see if the right edge of the tension pole is within the 2.3 ± 0.25 from the right edge of the Sup guide shaft.

Sup guide shaft

Tension pole

2.3 ± 0.25

Make the adjustment with the beginning of a T-120 tape.

Figure 8-15.

At left side from the center line

Tension pole adjuster adjusting range

Tension pole adjuster

90°

Figure 8-18.

Adjust so that the delta mark of tension pole adjuster is within 90° range (left, right).

8-16.CHECKING AND ADJUSTMENT OF

RECORD/PLAYBACK BACK TENSION

• Remove the cassette housing control assembly.

2.3 ± 0.25

Figure 8-16.

Insert the slotted screwdriver in the tension pole adjuster, and rotate counterclockwise.

At right side from the center line

2.3 ± 0.25

Figure 8-17.

Insert the slotted screwdriver in the tension pole adjuster, and rotate clockwise.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Turn off the power switch.

• Setting

1. Open the torque cassette meter and fix with tape.

2. Set the cassette tape in loading state.

3. Put the weight (500g) on the cassette torque meter.

4. Turn on the power switch.

500g

Weight to prevent float (500g)

Cassette torque meter

Figure 8-19.

• Checking

1. Push the REC button to place the unit in the SP record mode.

2. At this time ascertain that the back tension is within the setting (36.5 to 52g·cm) by seeing the indication of torque cassette meter.

DV-NC55U/C/M

• Adjustment

1. If the indication of torque cassette meter is lower than the setting, shift the tension spring engagement to the part A.

2. If the indication of torque cassette meter is higher than the setting, shift the tension spring engagement to the part B.

Tension arm

Tension spring

Figure 8-20.

8-17. CHECKING THE BRAKE TORQUE

• Checking the brake torque at the supply side

Torque gauge

CCW CW

• Checking the brake torque at the take-up side

Torque gauge

Take-up reel disk

CCW: 4.9~13.7mN⋅m (50~140gf⋅cm) CW: 3.9~10.8mN⋅m (40~110gf⋅cm)

CCW

Figure 8-22.

• Remove the cassette housing control assembly.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

Supply reel disk

CCW: 2.9~9.8mN⋅m (30~100gf⋅cm) CW: 4.9~13.7mN⋅m (50~140gf⋅cm)

Figure 8-21.

• Remove the cassette housing control assembly.

• After short-circuiting between TP5102 and TP5103 provided goes left at VTR display PWB, plug in the power cord.

• Setting

1. Switch from the FF mode to the STOP mode.

2. Disconnect the power cord.

3. Set a torque gauge to zero on the scale. Place it on the supply reel disk.

• Checking

Turn the torque gauge at a rate of about one turn/2 sec in the CW direction/CCW direction with respect to the supply reel disk so that the reel disk and torque gauge pointer rotate at equal speed, and make sure that the value is within the setting (CW direction: 4.9 to 13.7mN·m (50 to 140gf·cm); CCW direction: 2.9 to 9.8mN·m (30 to 100gf·cm).

• Setting

1. Switch from the FF mode to the STOP mode.

2. Disconnect the power cord.

3. Set a torque gauge to zero on the scale. Place it on the take-up reel disk.

• Checking

1. Turn the torque gauge at a rate of about one turn/2 sec in the CCW direction/CW direction so that the reel disk and torque gauge pointer rotates at equal speed and make sure that the value is within the setting (CCW direction: 4.9 to 13.7mN·m (50 to 140gf·cm), CW direction: 3.9 to 10.8 mN·m (40 to 110gf·cm).

2. Adjustment of the brake torque at the supply side and the take-up side

• Unless the supply side brake torque or take-up side brake torque is within the setting, clean the felt surface of reel disk (supply, take-up) brake lever, check again the brake torque.

• If value cannot be set within the setting yet, replace the main brake ass'y or main brake spring.

DV-NC55U/C/M

8-18. REPLACEMENT OF A/C (AUDIO/CONTROL)

HEAD

1. Remove the cassette housing control assembly.

2. In unloading state unplug the power cord.

• Removal

1. Remove the screws 123, Azimuth screw, Tilt screw.

2. Unsolder the PWB fitted to the A/C head.

Notes:

1. When replacing, never touch the head. If you touched, clean with the cleaning liquid.

2. When removing the screw 3, take care so that the spring may out.

Tilt screw

Azimuth screw

Height screw

Spring

3. Align the left end of gear of A/C head arm with the punched mark of chassis, tentatively tighten the screws 1 and 2 so as to ensure smooth motion of A/C head arm. Tentative tightening torque must be 0.15 to 0.20 N·m (1.5 to 2.0kgf·cm).

Tilt screw

Azimuth screw

Height screw

Left end of A/C head arm gear

Punched line mark on chassis

Figure 8-25.

Note:

1. If the screws 1 and 2 are tighten tentatively too loose, the azimuth and height of A/C head may change when they are finally tightened. Therefore care must be taken.

2. After completion of A/C head be sure to adjust tape running. (Execute the running adjustment by the method described in 8-21.)

Figure 8-23.

• Replacement

1. Solder the removed PWB to the new head assembly.

2. Adjust the height from the A/C head arm (lower surface) to the A/C head plate to 10.8mm with slide calipers. (3 places of azimuth screw section, tilt screw section and A/ C head front section) (See the figure below.)

Solder

New A/C head ass'y

A/C head PWB

Never touch the head

A/C head plate

Figure 8-24.

10.8mm10.8mm

DV-NC55U/C/M

8-19. A/C HEAD HEIGHT ROUGH ADJUSTMENT

• Setting

Height screw

Weight to prevent float (500g)

Azimuth screw

Tilt screw

Cassette tape

500g

Mechanism chassis

Figure 8-26.

8-20.HEIGHT ADJUSTMENT OF REVERSE

GUIDE

1. Adjust the height from the mechanism chassis to the reverse guide lower flange to 13.38 mm, using the reverse guide height adjustment jig, in tape loading state. (Refer to Figure 8-28 (a) (b).)

Reverse guide Reverse guide height adjusting jig

Mechanism chassis

(a)

Figure 8-28.

2. Rotate counterclockwise the reverse guide height adjustment nut 1/10 turn. (For height adjustment use the reverse guide height adjustment box driver (JiGDRiVER

11055)).

Reverse guide height adjusting jig

13.38mm

(b)

Box driver

1. Turn off the power switch.

2. Set the cassette tape in the unit.

3. Turn on the power switch.

4. Press the PLAY button to put the unit in the playback mode.

5. Roughly adjust the height of the A/C head by turning the height screw until the tape is in the position shown below.

A/C head

Tape

0.3mm

Figure 8-27.

• Adjustment

Adjust the height screw visually so that the control head is visible 0.3mm below the bottom of the tape.

CCW

Height adjusting nut

Figure 8-29.

3. Set the tape, and check for tape crease near the reverse guide in the playback mode. If crease is found, turn the reverse guide adjustment nut to remove crease. (As for crease check refer to Figure 8-

30.)

500g

Weight to prevent float (500g)

Mechanism chassis

Reverse guide

Capstan motor shaft

Fixing guide

An example of crease near the reverse guide

* Check for crease from the A direction.

Figure 8-30.

DV-NC55U/C/M

8-21. ADJUSTMENT OF TAPE DRIVE TRAIN

1. Tape run rough adjustment

1 Remove the cassette housing control assembly. 2 After short-circuiting between TP5102 and TP5103

provided goes left at VTR display PWB, plug in the power cord.

3 Check and adjust the position of the tension pole.

(See 8-15.)

4 Check and adjust the video search rewind back

tension. (See 8-13.)

5 Connect the oscilloscope to the test point for PB

CHROMA signal output (TP1201). Set the synchronism of the oscilloscope to EXT. The PB CHROMA signal is to be triggered by the head switching pulse (TP1202).

6 Set the alignment tape (VROATSV) to play. (Put a

500g weight on the cassette tape to prevent lift of cassette tape.)

Guide roller

Cassette Tape

500g

Weight of 500g

Figure 8-31.

Notes:

1. Previously set the tracking control in the center position, and adjust the ATR signal waveform to maximum with X value adjustment nut. Thereby the tape run rough adjustment is facilitated.

2. Especially the outlet side ATR signal waveform must have higher flatness.

Figure 8-32.

2. Adjustment of A/C head height and azimuth 1 Perform the initial setting of A/C head position by the

method stated in "8-18 Replacement 3".

2 Connect the oscilloscope to the audio output termi-

nal.

3 Using the alignment tape in which 1 kHz linear audio

signal has been recorded, adjust the height screw so as to get max audio output.

4 Using the alignment tape in which 7 kHz linear audio

signal has been recorded, adjust the azimuth screw so as to get max audio output.

5 The adjustment of 3 and 4 twice or three times

repeat, and finally adjust 4.

7 Press the tracking button (+), (–) and change the

ATR signal waveform from max to min and from min to max. At this time make sure that the ATR signal waveform changes nearly parallel.

8 Unless the ATR signal waveform changes nearly

parallel, adjust the height of supply side and take-up side guide roller so that the envelope waveform changes nearly parallel. (For ATR signal adjustment procedure refer to Figure 8-35.)

9 Turn the tilt screw to remove the tape crease at the

fixing guide flange. Playback the tape and check for tape crease at the fixing guide flange. (1)If there is no tape crease

Turn the tilt screw clockwise so that tape crease appears once at the flange, and then return the tilt screw so that the crease disappears.

(2)If there is tape crease

Turn counterclockwise the tilt screw so that the tape crease disappears. (Reference) If the tilt screw is turned clockwise crease appears at the lower flange.

For X value adjustment Adjust the X value, turning the geartype screwdriver.

Figure 8-33.

3. Tape run adjustment 1 Connect the oscilloscope to PB CHROMA signal

output test point, set oscilloscope sync to EXT, trigger-input the PB CHROMA signal (head switching pulse).

2 Rough adjustment of X value

Tentatively fix A/C head arm screws 1 and 2 by the method described in 8-18 "Replacement 3". Playback the alignment tape (VROATSV) and shortcircuit between TP5101 and TP5103. As a result the auto-tracking is automatically cancelled, so that the X value adjustment mode is set. Move the A/C head with the X value adjustment gear driver (JiGDRiVER-6) by the method shown in Figure 8-33, and adjust the A/C head so as to get the maximum ATR signal waveform. (Note: When the A/ C head is adjusted, adjust so that the maximum ATR signal waveform is obtained nearest the position of initial setting made in 8-18.)

3 Next, press the tracking button (+), (–) and change

the ATR signal waveform from max to min and from min to max. At this time adjust the height of supply and take-up side guide roller with the adjustment driver (JiGDRiVER-4) so that the ATR signal waveform changes nearly parallel.

4 If the tape is lifted or sunk from the helical lead

surface, the PB CHROMA signal waveform appears as shown in Figure 8-35.

5 Press the tracking button (+), (–) and make sure that

the ATR signal waveform changes nearly parallel.

6 Finally check tape crease near the reverse guide. If

tape crease is found, remove it as stated in 8-20 "HEIGHT ADJUSTMENT OF REVERSE GUIDE" item 3.

Supply side

Take-up side Supply side Take-up side

DV-NC55U/C/M

PB CHROMA Signal

Head switching pulse

Figure 8-34.

4. A/C head X value adjustment 1 Tentatively fix A/C head arm screws 1 and 2 by the

method described in 8-18 "Replacement 3".

2 Playback the alignment tape (VROEFZCS or

VROEFZHS), and shortcircuit between TP5101 and TP5103. As a result the auto-tracking is automatically cancelled, so that the X value adjustment mode is set.

When the tape is below the helical lead.When the tape is above the helical lead.

Adjustment

Supply side guide roller rotated in clockwise direction (lowers guide roller) to flatten ATR signal.

Take-up side guide roller rotated in clockwise direction (lowers guide roller) to flatten ATR signal.

Figure 8-35.

3 Move the A/C head with the X value adjustment gear

driver by the method shown in Figure 8-33, and adjust the A/C head so as to get the maximum ATR signal waveform. (Note: At this time adjust so as to get the maximum ATR signal waveform nearest the A/C head position which has been set in case of X value rough adjustment as stated in 8-21, 3- 2.)

4 Tighten finally the screws 1 and 2. Be sure to tighten

at first the screw 1 and then the screw 2. Final tightening torque is 0.6N·m (If the screw 2 is tightened first, the X value may deviate.)

5 Adjust the playback switching point (Refer to the

electric adjustment method.)

6 Playback the self-picture-recorded tape, and check

the flatness of ATR signal waveform and sound.

Supply side guide roller rotated in counterclockwise direction (raises guide roller) to make the tape float above the helical lead. The supply side guide roller is then rotated in the clockwise direction to flatten the ATR signal.

Take-up side guide roller rotated in counterclockwise direction (raises guide roller) to make the tape float above the helical lead. The take-up side guide roller is then rotated in the clockwise direction to flatten the ATR signal.

Notes:

When the A/C head X value adjustment is performed, be sure to perform at first X value rough adjustment (refer to 8- 21, 3-2).

Figure 8-36.

DV-NC55U/C/M



8-22.REPLACEMENT OF THE CAPSTAN D.D.

(DIRECT DRIVE) MOTOR

• Remove the mechanism from the main PWB (refer to 84 item 1 When removing the mechanism from the main

PWB ).

• Removal (Follow the order of indicated numbers.)

1. Remove the reel belt 1.

2. Remove the slow brake lever 2.

3. Remove the three screws 3.

Capstan D.D. motor

control PWB

8-23. REPLACEMENT OF DRUM D.D. MOTOR

1. Set the ejection mode.

2. Withdraw the main power plug from the socket.

• Removal (Perform in numerical order.)

1. Disconnect the FFC cable 1.

2. Unscrew the D.D. stator assembly fixing screws 2.

3. Take out the D.D. stator assembly 3.

4. Unscrew the D.D. rotor assembly fixing screws 4.

5. Take out the D.D. rotor assembly 5.

Notes:

1. In removing the D.D. stator assembly, part of the drum earth spring pops out of the pre-load collar. Be careful not to lose it.

2. Install, so that the D.D. rotor ass'y and upper drum ass'y mounting direction check holes align. (Align the upper drum dent with the rotor hole.)

3. Be careful not to damage the upper drum or the video head.

4. Protect the hole elements from shock due to contact with D.D. stator or D.D. rotor ass'y.

5. After installation adjust the playback switching point for adjustment of servo circuit.

Reel belt

Slow Blake Lever

Figure 8-37.

• Reassembly

1. Taking care so that the capstan shaft does not contact the mechanism chassis, set its position on the mechanism chassis, and then install with the three screws 3.

2. Install the slow brake lever 2.

3. Install the reel belt 1.

Notes:

1. Before installing the capstan D.D. motor, confirm whether an acetate tape (ZTAPEN120020E) is drawn on the back of mechanism chassis.

Stick an acetate tape on the projection part of the chassis.

Capstan Motor Installation position.

Mechanism Chassis from the back.

D.D. stator ass'y

D.D. rotor ass'y

FFC

Upper drum

Figure 8-39.

Figure 8-38.

2. After installing the capstan D.D. motor, be sure to rotate the capstan D.D. motor and check the movement.

3. Set the tape, and check for the tape crease near the reverse guide in the playback mode. Adjust the A/C head and azimuth as stated in 8-21 item 2. If crease is found, adjust as stated in 8-21 item 3.

DV-NC55U/C/M

4 3 2

8-24.REPLACING THE UPPER AND LOWER

DRUM ASSEMBLY

• Replacement (Perform in the numerical order)

1 Remove the motor as stated in 8-23 D.D. motor replace-

ment.

2 Remove the drum earth brush ass’y 2. 3 Remove the drum base 3 from the upper and lower

drum assembly 1.

[Cares when replacing the drum]

1. Be careful so that the drum earth brush is not lost.

2. Do not touch directly the drum surface.

3. Fit gently the screwdriver to the screws.

4. Since the drum assembly is an extremely precise as-

sembly, it must be handled with utmost care.

5. Make sure that the drum surface is free from dust, dirt

and foreign substances.

6. After replacing the drum be sure to perform the tape

running adjustment. After that, perform also the electrical adjustment.

• Playback switching point adjustment

• X-position adjustment and check

• Standard and x-3 slow tracking adjustment

7. After replacing the drum clean the drum.

8-25.ASSEMBLING OF PHASE MATCHING

MECHANISM COMPONENTS

• Assemble the phase matching mechanism components in the following order.

1. Assemble the pinch roller assembly and pinch drive cam.

2. Mounting the shifter (on the back of the mechanism chassis).

3. Mounting the master cam (on the back of the mechanism chassis).

4. Assemble the connection gear, slow brake and loading motor parts.

• PINCH DRIVE CAM AND PINCH ROLLER

ASSEMBLING METHOD.

(Place the following parts in position in numerical order.)

(1)Reverse drive lever 1 (2)Reverse guide spring 2 (3)Reverse guide lever ass’y 3 (4)Reverse guide height adjusting nut 4 (5)Pinch drive cam 5 (6)Pinch roller ass’y 6 (7)Open lever 7

Figure 8-41.

Figure 8-40.

DV-NC55U/C/M

1Insert Reverse Guide Lever Ass’y

Insert reverse guide lever ass'y

2 Insert pinch drive cam

Turn the reverse guide lever assembly counterclockwise to the stopper.

Fit the pinch drive cam so that the notch of pinch drive lever assembly aligns with the half-round notch of chassis.

Pinch drive lever ass'y

Figure 8-42-1.

2Insert Pinch Roller/Pinch Double Action Lever Ass’y.

Pinch Roller Double Action Lever Ass'y

Phase Matching Point 2

Align here.

Fit the pinch drive cam so that the notch of pinch drive cam aligns with the dent of pinch drive lever assembly.

3Insert Open Lever.

Open lever

Figure 8-42-2.

Figure 8-42-3.

DV-NC55U/C/M

8-26. INSTALLING THE SHIFTER

Capstan D.D. motor

Reel pulley

(Bottom side of mechanism chassis)

Figure 8-43.

Insert point 3

Drum

1. Make sure that the loading gear is at the Phase-Matching point 1 as shown below.

2. Install, paying attention to insert point 5 and release point 3.

3. For the phase matching at the insert point 1, see the Phase-Matching point 2 as shown below.

4. Finally fix the inserts 1 and 4.

Phase-Matching point 2

Loading gear (T)

Round mark

Sifter

Half round notch

Insert point 1

Shaft 1

Insert point 2

Rotation point 2

Shaft 1

Insert point 4

Shaft 4

Insert point 5

Phase-matching point 1

Shaft 1

Figure 8-44.

Release point 3

DV-NC55U/C/M

8-27.INSTALLING THE MASTER CAM (AT

REAR SIDE OF MECHANISM CHASSIS)

1. Make sure beforehand that the shifter is at the point as shown below.

2. Place the master cam in the position as shown below.

E ring (XRESJ30-06000)

Master cam

Fully turn clockwise

Fully turn counterclockwise

Face the wide tooth side ward

Figure 8-45-1.

8-28. REPLACEMENT OF LOADING MOTOR

• Removal

Apply grease

No grease

Note:

See the figure below for the phase matching between the master cam and the casecon drive gear.

3. Finally fix with the E ring.

Master cam

Casecon drive gear

Half-round notch

Round mark

When installing the master cam, align the casecon drive gear round mark with the half-round notch of master cam.

Figure 8-45-2.

Figure 8-46.

• Replacement

Remove the loading motor, and install the replacement loading motor as shown below.

+0.2

10.2 mm

–0.2

Figure 8-47.

The loading motor pressing-in must be less than 14.7 N (1,500 gf). Adjust the distance between motor and pulley to 10.2

+0.2

mm).

–0.2

8-29. ASSEMBLY OF CASSETTE HOUSING

1. Drive Gear and R Drive angle ass’y

Apply grease

Figure 8-48.

DV-NC55U/C/M

MSPRT0381AJFJ

Apply grease

2. Synchro Gear, Drive Gear L and Drive Gear R

Top surface should be free from scratches or soil.

Drive angle

LANGF9592AJFW

Drive gear R

Frame

Figure 8-49.

DV-NC55U/C/M

9. TEST MODE

F0000000 00000000

"NO DISC" state

"F0" key input (Press the "play" key and the "stop" key for 5 seconds.)

The preparation date display of the program 10000000 ~~~~~~~~ (Last updata)

The "playback" key of the remote controller is pushed. Model number display 10000001 00000552 (Model number)

The "playback" key of the remote controller is pushed. The version display of the program 10000002 ~~~~~~~~ (Program ver.)

The "playback" key of the remote controller is pushed. Reagion number display 10000003 00000002 (Region code:Binary display)

The "playback" key of the remote controller is pushed. Micro-code number display 10000004 ~~~~~~~~ (Microcode ver.)

The "playback" key of the remote controller is pushed. The preparation date display of the servo program

10000005 ~~~~~~~~ (Servo ver.)

The "playback" key of the remote controller is pushed. It is returned to the test mode initial image plane.

Micro-code is the thing of the process program of the system integrated circuit.

Color bar display 00001 (FIP)

The "playback" key of the remote controller is pushed. Color bar display

00002 (FIP)

The "playback" key of the remote controller is pushed. Color bar display

00003 (FIP)

The "playback" key of the remote controller is pushed. Color bar display

00004 (FIP)

The "playback" key of the remote controller is pushed.

The all FIPs burning 40000000 00000000 (OSD only)

The "4" key of the remote controller is pushed. It is returned to the test mode initial image plane.

There is no copy guard signal. As for the symptom when it was dubbed in the video tape recorder?

AGC only As for the symptom when it was dubbed in the video tape recorder?

AGC+Color stripe1 As for the symptom when it was dubbed in the video tape recorder?

AGC+Color stripe2 As for the symptom when it was dubbed in the video tape recorder?

To (1)

From (1)

"3" Key input

DYNMIC TEST 30000000 00000000

"1" Key input

LASER TEST 30000001 000000DD

"1" Key input

DV-NC55U/C/M

Laser test mode

The tray opens, the DVD laser is lit, spinning is performed and the sled moves to the outer periphery.

LASER TEST 30000001 000000CD

LASER TEST 30000001 00000000

"2" Key input

STEP TEST 30000001 00000000

STEP TEST 30000200 00000000

STEP TEST 30000201 00000000

STEP TEST 30000202 00000000

STEP TEST 30000203 00000000

STEP TEST 30000204 00000000

STEP TEST 30000205 00000000

The DVD laser goes out, the CD laser is lit, spinning is performed, and the sled moves to the outer periphery.

"1" Key input

The DVD and CD lasers go out, spinning is performed and the sled moves to the outer periphery.

"1" Key input

Step execution mode

Load a disc after the tray is opened.

"Open/Close" Key input

Focus on

"Playback" Key input

RF gain adjustment, Track on

"Playback" Key input

Focus gain adjustment

"Playback" Key input

Track gain adjustment

"Playback" Key input

Focus balance adjustment

To (2)

STEP TEST DD000210 00000000

STEP TEST DD000211 00000000

"Playback" Key input

STEP TEST END DD000212 ~~~~~~~~

(~~~~~~~~ is a sector ID)

In case of 2-layer DVD, adjust the focus balance, the RF gain and the focus gain of the layer 0.

Control data lead

Following playback state

STEP TEST END CD000210 ~~~~~~~~

(~~~~~~~~ is a SUB-Q)

(CD operation)(DVD operation)

Following playback state after reading TOC.

DV-NC55U/C/M

From (2)

"3" Key input

"MENU" Key input

Following playback, jump test mode

PLAY TEST 30000001 00000000

"Open/Close" Key input

PLAYTEST DD000303~~~~~~~~

Spin offset adjustment mode

SPIN OFFSET

Load a disc after the tray is opened.

Following playback state (~~~~~~~~ is a sector ID)

Pressing the keys on the remote control mentioned in the table below enables the test jump.

Key Jump Key Jump

1-131 4 -102 6 102

7 -510 9 510 C -511 M 511 2 -765 Repeat 765 5 -766 A-B 766 8 -7000 Program 7000

Before skipping. -15000 After skipping. 15000 Next replay Layer Jump

Tray open.

ADJUSTCOMPLETE 000000000000~~~~

(Offset adjustment of the spindle is executed automatically.) The adjustment result is indicated in the ~~~~ section.

[ROM RENEWAL MODE]

1. A DVD itself and a personal computer are articulated as the right figure. Software for the renewal is started more.

2. A power source is put with pushing a DVD's own playback key and a halt key at the same time. (It keeps pushing it for about three seconds.)

R : OK

3. When "Y" is inputted in accordance with the personal computer display and data transfer indication is shown and renewal process is started normally when an ENTER key is pushed.

W : STR

4. When renewal is completed normally.

W : END

5. "STOP" key is surely pushed if renewal is completed and the display of above NO.4 is confirmed.It is made to turn off POWER after that.

PART CODE Price Code

RUNTK0808GEZZ CD

It is displayed.

Fixture for the ROM renewal (RUNTK0808GEZZ)

DIGITAL It is articulated to the OUT terminal connection child.

Personal computer

(DOS)

DVD itself

DV-NC55U/C/M

FLOW CHART NO.1

Is the supply voltage of 5V fed to pin(14) and pin

(38) of IC5001?

Check the PC 5V line.

Is the supply voltage of -19V fed to pin(27) of

IC5001?

Check the PC -19V line and Q8202.

Is there 500kHz oscillation at pin(44) of IC5001?

Check R5014-5, IC5001 and their periphery.

Check the signal lines of FIP DA, FIP CK, FIP CS

of IC5001 and IC504.

Check or replace IC5001 and IC504.

FLOW CHART NO.2

Is key switch contact and installation state normal? Replace key switch.

Is the control voltage normally into the pins(95)

and (96) of IC504?

Are the filament voltage applied between (1), (2)

and (31), (32) of the fluorescent display tube?

Also negative voltage applied between these pins

and GND.

Check the power circuit, D5004 and Q8203.

Check the fluorescent display tube and its periphery?

Check that the fluorescent display tube is free from

damages such as crack.

Yes

The fluorescent display tube does not light.

The key operation is disabled.

KEY-1/2

3.3V

2.5V

1.8V

0.9V

KEY–2KEY–1

OFF

S5003

STOP

S5002

PLAY

Check AT 5V line.

Replace the remote control receiver.

FLOW CHART NO.3

Operation is possible from the DVD, but no

operation is possible from the infrared remote

control.

Replace the remote control receiver or replace the

remote control transmitter is necessary.

Is 5V voltage supplied to the pin(3) terminal of

remote control receiver?

Check the line between the remote control receiver

and the pin(10) of IC8201.

Is the "L" pulse sent out pin(1) terminal of receiver

when the infrared remote control is activated?

Is pulse signal supplied to the pin(10) of IC8201?

Check the line between the remote control receiver

and the pin(32) of IC504.

Replace IC504.

Replace IC8201.

Is pulse signal supplied to the pin(32) of IC504?

Yes

No operation is possible from the infrared remote control.

FLOW CHART NO.4

Is the signal from the pins(70) and (69) of IC504

input into the pins(1) and (28) of IC7701?

Check the LD-RVS/FWD signal line between

IC7701 and the IC504.

Check AT 8V line.

Is 8V voltage applied to the pin(8) of IC7701?

Check for mechanism and gear engagement and breakage.

Is FE signal inputted into the pin(150) of IC701?

Check or replace IC701.

Check the line between the IC301 and IC701.

Is loading motor drive voltage output from the

pins(9) and (10) of IC7701?

Is the loading motor drive voltage applied to the

terminal of loading motor?

Check the line between the IC702 and the

loading motor.

FLOW CHART NO.5

Does the optical pickup move up and down after

the disc is removed?(Checking of symptom.)

See FLOW CHART NO.6<The [No Disc] indication.

(In case focus servo does not function.)>

Replace IC301.

Is there input signal on the pins(52), (53), (54) and

(55) of IC301?

Is FE signal output to the pin(21) of IC301 when

the disc is set?

Check the connection of optical pickup cable.

If it is normal, replace the optical pickup.

Replace IC702.

Yes

The disc tray cannot be opened and closed.

The [No Disc] indication. (In case of focus error)

10. TR OUBLESHOOTING

(DVD)

DV-NC55U/C/M

FLOW CHART NO.6

Is the focus control signal output to the pin(158) of

IC701?

Check the pin(11) of IC701 DAC power source

periphery circuit. If it is normal, replace IC701.

Check the line between the IC7701 and the focus

actuator.

Check AT 8V line.

Is 8V voltage applied to the pin(8) of IC7701?

Check the pin(21) of IC7701 and replace IC7701.

Is the focus control signal from the pin(158) of

IC701 input into the pin(23) of IC7701?

Check the focus control signal line between

the IC7701 and IC701.

Is the focus control drive voltage output from the

pins(17) and (18) of IC7701?

Is the focus control drive voltage applied to the

terminal of focus actuator?

Check the connection of optical pickup cable.

If it is normal, replace the traverse chassis unit.

FLOW CHART NO.7

Check the A_5V line.

Is the Q303(LD POWER CTL) drive output to the

pin(46) of IC301? (Checking of symptom.)

Is 5V voltage applied to the emitter of Q303?

Is approx. 2V applied to the pin(3) of the pickup

terminal? (See note.)

Check the connection of optical pickup cable.

If it is normal, replace the traverse chassis unit.

Check the line between the Q301, Q307 and

pickup terminal.

Check the line between the pin(46) of IC301 and

the base of Q303.

FLOW CHART NO.8

Check the loading switch.

Check for contamination of objective lens of

optical pickup.

Replace traverse chassis unit.

Do you have loading done the disk by normality?

See FLOW CHART NO.9 and NO.10.

Set the disc on the disc tray.

Replace the main PWB unit.

Is the level of RF signal which is output from

pins(29), (30) of IC301, normal?

Yes

The [No Disc] indication. (In case focus servo does

not function.)

The [No Disc] indication. (When the laser beam

does not light.)

Both picture and sound do not operate normally.(1)

Note: Since the laser diode is very susceptible to static

electricity, be careful of static electricity or electricity

leak from the measuring equipment when confirming

the voltage.

FLOW CHART NO.9

Check the PC 5V line.

Set the disc on the disc tray.

Are the video signals outputted to the pins of main

unit connector CN802?

CN802 1PIN CVBS/Y

CN802 3PIN Y/CR

CN802 5PIN C/CB

Check the main unit.

(IC601, Q205, Q203, Q202 periphery circuit.)

Check the parts around Q2002 ~ Q2005 and

Q2008 ~ Q2011, Q2001 ~ Q2004, Q2007,

Q2010, Q2003~Q2006, Q2009, Q2012, and the

lines between them.

Yes

Check the V-MUTE line.

Yes

Picture do not operate normally.

Are the video signals shown above input into

the pins of IC2002?

IC2002 5PIN CVBS

IC2002 2PIN S-Y

IC2002 12PIN S-C

Are the video signal outputted to each pins of

IC2002?

IC2002 4PIN CVBS

IC2002 15PIN S-Y

IC2002 14PIN S-C

Is 5V applied to the pin(16) of IC2002?

Replace IC2002.

Are the V-MUTE lines at the pins(9), (10) and (11)

of IC2002 on "L" level?

Is 5V applied to the pin(7) of IC2004?

Yes

Check the DVD-H line.

Yes

Replace IC2003.

Yes

Are the video signals shown above output into

the pins of output terminal?

Are the composite video signals outputted to the

VIDEO OUT terminal (J1202)?

Are the luminance signals outputted to the

S-OUT terminal (J1205)?

Are the chroma signals outputted to the

S-OUT terminal (J1205)?

Are the video signal outputted to each pins of

IC2003, 2004?

IC2004 4PIN Y

IC2004 5PIN C

IC2003 2PIN COMP

Check the VIDEO OUT terminal (J1202) and the

line between the pin(2) of IC2003 and the VIDEO

OUT terminal (J1202).

Check the S-OUT terminal (J1205) and the line

between the pin(4) of IC2004 and the S-OUT

terminal (J1205).

Check the S-OUT terminal (J1205) and the line

between the pin(5) of IC2004 and the S-OUT

terminal (J1205).

Is 5V applied to the pin(3) of IC2003?

Are the DVD-H at the pin(1) of IC2003 on "H" level?

DV-NC55U/C/M

FLOW CHART NO.10

Set the disc on the disc tray.

Are the digital audio interface signals outputted

to the pins of main unit connector CN801?

CN801 3PIN AMCLK

CN801 4PIN ABCLK

CN801 5PIN ALRCLK

CN801 6PIN AOUT0

Check the main unit. (IC601 periphery circuit.)

Check the line between the pins of main unit

connector CN801 and the pins of IC6001.

CN801 3PIN → IC6001 5PIN AMCLK

CN801 4PIN → IC6001 3PIN ABCLK

CN801 5PIN → IC6001 1PIN ALRCLK

CN801 6PIN → IC6001 2PIN AOUT0

Yes

Sound do not operate normally.

Are the digital audio interface signals inputted

to the pins of IC6001?

IC6001 5PIN AMCLK

IC6001 3PIN ABCLK

IC6001 1PIN ALRCLK

IC6001 2PIN AOUT0

Check the PC 3.3V line and PC 5V line.

Is 3.3V applied to the pin(7) and 5.5V applied to the

pins(10), (15) and (19) of the IC6001?

Are the audio interface signals outputted to the

pins of IC6001?

IC6001 16PIN L OUT

IC6001 13PIN R OUT

Check or replace IC6001.

Yes

Check the PC 9V line.

Is 9V applied to the pin(8) of IC6004?

Check or replace IC6004.

Yes

Are the system control interface signals outputted

to the pins of main unit connector CN801?

CN801 10PIN ADAC DA

CN801 11PIN ADAC CK

CN801 12PIN ADAC L

CN801 16PIN RSTO I

Check the main unit. (IC504 periphery circuit.)

Check the line between the pins of main unit

connector CN801 and the pins of IC6001.

CN801 10PIN → IC6001 26PIN ADAC DA

CN801 11PIN → IC6001 27PIN ADAC CK

CN801 12PIN → IC6001 28PIN ADAC L

CN801 16PIN → IC6001 22PIN RSTO I

Yes

Are the audio interface signals inputted to the

pins of IC6004?

IC6004 3PIN L OUT

IC6004 5PIN R OUT

Check the line between the pins of IC6001 and the

pins of IC6004.

IC6001 16PIN → IC6004 3PIN L OUT

IC6001 13PIN → IC6004 5PIN R OUT

Are the audio interface signals outputted to the

pins of IC6004?

IC6004 1PIN L OUT

IC6004 4PIN R OUT

Yes

Are the system control interface signals inputted

to the pins of IC6001?

IC6001 26PIN ADAC DA

IC6001 27PIN ADAC CK

IC6001 28PIN ADAC L

IC6001 22PIN RSTO I

*1 *2 *3

Check the DVD-H line and

Q6010.

Replace IC6010.

Yes

Is 9V applied to the pin(16) of IC6010?

Are the audio interface signals outputted to the

pins of IC6010?

IC6010 15PIN L OUT

IC6010 14PIN R OUT

Are the pins(9), (10) and (11) of IC6010 on "L" level?

Yes

Are the audio interface signals inputted to the pins

of IC6010?

IC6010 2PIN L OUT

IC6010 12PIN R OUT

Check the line between the pins of IC6001 and the

pins of IC6004 and the sound mute periphery

circuit.(Q6007-8.)

IC6004 1PIN → IC6010 2PIN L OUT

IC6004 4PIN → IC6010 12PIN R OUT

Are the audio interface signals inputted to the pins

of IC6011?

IC6011 3PIN L OUT

IC6011 5PIN R OUT

Check the line between the pins of IC6010 and the

pins of IC6011.

IC6010 15PIN → IC6011 3PIN L OUT

IC6010 14PIN → IC6011 5PIN R OUT

Is 9V applied to the pin(8) of IC6011?

Replace IC6011.

Yes

Are the audio interface signals outputted to the

pins of IC6011?

IC6011 1PIN L OUT

IC6011 7PIN R OUT

Are the audio signals output to the specific

outputted terminals?

Is the DVD audio signal (L) output to the

AUDIO OUT (L) terminal (J1202)?

Is the DVD audio signal (R) output to the

AUDIO OUT (R) terminal (J1202)?

Check the AUDIO OUT (L) terminal (J1202) and the

line between the pin(1) of IC6011 and the AUDIO

OUT (L) terminal (J1202).

Check the AUDIO OUT (R) terminal (J1202) and the

line between the pin(7) of IC6011 and the AUDIO

OUT (R) terminal (J1202).

Are the audio signals output to the specific

outputted terminals?

Is the DVD audio signal (L) output to the DVD

AUDIO OUT (L) terminal (J1204)?

Is the DVD audio signal (R) output to the DVD

AUDIO OUT (R) terminal (J1204)?

Check the DVDAUDIO OUT (L) terminal (J1204)

and the line between the pin(16) of IC6001 and the

DVD AUDIO OUT (L) terminal (J1204).

Check the DVDAUDIO OUT (R) terminal (J1204)

and the line between the pin(13) of IC6001 and the

DVD AUDIO OUT (R) terminal (J1204).

*1 *2 *3

DV-NC55U/C/M

FLOW CHART NO.1

Is the supply voltage of 5V feed to pin(8) of IC5101?

Check STBY 5V line.

Is the supply voltage of –20V feed to pin(1) of IC5101?

Check STBY –20V line.

Is it possible to confirm signals FIP CS, FIP OE,

FIP DATA, and FIP CLK on the pins(2), (3), (5)

and (6) of IC5101?

Check signal line between IC1701 and IC5101.

Are grid and segment signals supplied to the

indication tube (DG5101) from the indication tube

driver IC (IC5101)?

Replace IC5101.

FLOW CHART NO.2

Does the key switch make good contact, when the

cassette tape is inserted?

Check switch contact.

Is there the function control voltage inputted at the

pins(87) and (88) of IC1701?

Is supply filament voltage feed between pin(1)/(2)

and (31)/(32) of the flourescent display tube?

Check power circuit and D1952.

Check the periphery of fluorescent indication tube

and main block.

Check that the fluorescent indication tube is free

from damages such as crack.

YES

Check or place the peripheral circuit of IC1701.

YES

The VTR flourescent display tube fails light up.

Key-in input is not received.

FLOW CHART NO.3

Operation is possible from the VCR, but no

operation is possible from the infrared remote

control.

Is the supply voltage of 5V feed to pin(3) terminal

of remote control receiver?

Check AT 5V lines.

Is "L" pulse sent out pin(1) terminal of receiver

when the infrared remote control is activated?

Replace the remote control receiver or replace the

remote control transmitter if necessary.

Is inputted "L" pulse to pin(5) of IC1701?

Check line between at remote control receiver thru

to pin(5) of IC1701.

Replace IC1701.

YES

No operation is possible from the infrared remote control.

FLOW CHART NO.5

Does the start sensor pulse at pin(79) of IC1701

change from "L" to "H" level when the cassette

tape is loaded?

Check line start sensor and all the way up thru to

pin(79) of IC1701.

Does the end sensor pulse at pin(85) of IC1701

change from "L" to "H" level when the cassette

tape is loaded?

Check line end sensor and all the way up thru to

pin(85) of IC1701.

Does the master cam mode shifteroperate

normally when the cassette tape is loaded?

Check cam switch (A), (B) and all the way

up thru to pins(7), (6) of IC1701.

Replace IC1701.

YES

A cassette tape is taken in, but ejected at once.

FLOW CHART NO.4

Is "L" level applied at pin(93) of IC1701.

Are start sensor shutter go to openwhen the

cassette tape is inserted?

Check start sensor shutter.

Does pin(79) of IC1701 change from "H" to "L"

level when the cassette tape is inserted?

Check line start sensor and all the way up thru to

pin(79) of IC1701.

YES

Does pin(11) of IC1706 go to a "H"(about 4.7V)

level when the cassette tape is inserted?

Check line pin(91) of IC1701 and all the way up

thru to pin(11) of IC1706.

YES

Does pin(13) of IC1706 change to about 10V when

the cassette tape is inserted?

Check IC1706.

YES

Is the specified voltage (about 10V) applied at the

loading motor terminal when the cassette tape is

inserted?

Check between IC1706 and loading motor.

YES

Replace loading motor.

Check R1847.

A cassette tape is not take in.

(VTR)

DV-NC55U/C/M

FLOW CHART NO.8

Is the voltage more than about 2.6V DC given out

of pin(29) of IC1701.

Check IC1701.

Is the supply voltage of 5V feed to pin(8) of AC

connector?

Check PC 5V line.

Is the voltage more than 2.6V DC sent in pin(4) of

AC connector?

Check between the pin(4) of AC connector and all

the way up thru to pin(29) of IC1701.

Replace capstan motor.

YES

Is approx. 3.5V applied to the pin(3) of the AC

connector?

Check the pin(92) of IC1701.

YES

Is 23V applied to the pin(5) of the AC connector

normally?

Check AT 23V line.

YES

The capstan motor fails to run.

FLOW CHART NO.6

Does the capstan motor start when the EJECT

button is pressed?

See FLOW CHART NO.8.

Does the take-up reel disk turn when the capstan

motor is running?

Check reel disk and reel drive unit.

Are pulses applied at pin(2) of IC1701 when the

take-up reel disk is turning?

Check take-up reel sensor and all the

way up thru to pin(2) of IC1701.

Replace cassette cam, gear, etc.

YES

Is a "H"(about 4.7V) level applied at pin(12) of

IC1706 when a reel pules has been inputted?

Check pin(90) of IC1701.

YES

Is the voltage about 10V sent out of pin(15) of IC1706?

Check IC1706.

YES

Is the specified voltage applied at the loading

motor terminal?

Check between IC1706 and all the way up thru to

the loading motor.

YES

Dose the loading motor run?

Replace loading motor.

YES

The cassette tape fails to eject.

FLOW CHART NO.7

Does power control(H) signal at pin(4) of IC1701

change from "L" to "H" level?

Check IC1701.

Does the base of Q1951 change from about 5.0V

to 4.5V?

Check the pin(4) of IC1701 and all the way up thru

to Q1952.

Is 5V sent out of the collector of Q1951?

Check Q1951 and the STBY 5V line.

YES

No power is turned on.

FLOW CHART NO.9

Is the voltage more than about 2.6V DC given out

of pin(46) of IC1701.

Check IC1701.

Is the supply voltage of 5V feed to pin(3) of IC1706?

Check PC 5V line.

Is the voltage more than about 2.6V applied at

pin(2) of IC1706?

Check between pin(46) of IC1701 and all the way

up to pin(2) of IC1706.

YES

Is the supply voltage of 12V feed to pin(21) of IC1706?

Check PC 12V line.

YES

Check or replace drum motor.

YES

The drum motor fails to run.

FLOW CHART NO.10

Is drum PG signal given out of pin(7) of IC1706?

Check pins(4), (5), (6) of IC1706 and periperal circuits.

Check or replace drum motor.

Replace IC1706.

Is drum PG signal given out of pin(66) of IC1701?

Check line between pin(7) of IC1706 and all the

way up thru to pin(66) of IC1701.

Is V-H.SW.P pulse given out of pin(23) of IC1701?

Check IC1701.

YES

Replace IC1701.

YES

The drum motor runs only for a few seconds.

FLOW CHART NO.11

Is the drum motor rotating?

See FLOW CHART NO.9, 10

Is the drum PG signal and drum FG signal present

on pins(66) and (65) of IC1701, respectively?

Replace IC1701.

Are the drum PG and drum FG signals present on

pins(7) and (8) of IC1706?

Check line between pins(7), (8) of IC1706 and all

the way up thru to pins(65), (66) of IC1701.

Check periperal circuit of IC1706.

YES

No head switching pulse.

D-FG

About 5Vp-p

D-PG

About 5Vp-p

DV-NC55U/C/M

FLOW CHART NO.12

Is there 14.3MHz oscillation at pins(37) and (38)

of IC1701?

Check peripheral circuit of X1701.

Is there drum FG signal at pin(65) of IC1701 present?

Is the V-SYNC signal(reference) at pin(50) of IC1701?

YES

In PB mode

YES

In REC mode

Is the head switching pulse at pin(23) of IC1701

present?

See FLOW CHART NO.11

YES NO

Is the drum APC output at pin(34) of IC1701 and

drum AFC output at pin(32) of IC1701 present?

Replace IC1701.

YES

Is the drum control voltage applied to pin(2) of

IC1706?

Is pin(46) of IC1701 in high impedance?

YES

Does the IC1706 operate normally?

YES

Replace drum motor.

YES

Drum servo does not function.

Check peripheral circuit of C1770-1 and R1770.

Check drum FG signal line.

FLOW CHART NO.13

2Only REC mode inoperative

YES

YES YES

YES

Are REC and/or PB mode inoperative?

Check peripheral circuit of X1701.

1Only PB mode inoperative

Does PB CTL signal appear at

pin(76) of IC1701 (TP1201)?

Does AA-MH harness normally?

Does A/C head operate normally?

Replace A/C head.

Check AC-MC connector and

capstan FG signal line.

Check capstan motor unit and/or

replace.

Is there capstan AFC and APC

at pins(31) and (33) of IC1701?

Replace IC1701.

Replace AA-MH harness.

Readjust the A/C head height.

Is there 14.3MHz oscillation at

pins(37) and (38) of IC1701?

Does the capstan FG signal appear

at pin(67) of IC1701?

Dose pin(29) of IC1701 operate

normally?

Check "1"

Check "2"

Replace IC1701.

Is there REC CTL signal output at

pins(75) and (74) of IC1701?

Is the V-SYNC signal(reference) at

pin(50) of IC1701?

Check peripheral circuit of

C1770-1 and R1770.

Is there capstan AFC and APC

at pins(31) and (33) of IC1701?

Capstan servo does not function.

FLOW CHART NO.14

YES

YES NO

YES

NONONO

YES

Is picture signal input into pins(30), (28) and (31)

of IC1201?

Is picture signal output to the pin(52) of IC1201?

Is picture signal input into the pin(49) of IC1701?

Check the line between pin(52) of

IC1201 and pin(49) of IC1701.

Is 5V applied to the pin(12) of IC1201?

Check the YC 5V line.

1 External input mode

• Check the line between the rear video input

terminal and pin(30) of IC1201.

• Check the line between the rear video input

terminal and pin(28) of IC1201.

2 U/V tuner mode

Check the line between the pin(25) of U/V tuner

and pin(31) of IC1201.

Is picture signal output to the pin(47) of IC1701 ?

Is 5V applied to the pin(51) of IC1701?

Check the AT 5V line.

Is picture signal output to the emitter of video

output buffer (Q1251)?

Line output: Is there V-SYNC signal input at

pin(6) of IC2003.

Check the line between pins(63) and (62) of IC1201

and pins(56) and (57) of IC1701.

Check Q1251 periphery.

Check the line between the Q1251 emitter and the

pin(6) of IC2003.

Is there V-SYNC signal output at pin(2) of IC2003.

YES NO

Check the VIDEO OUT terminal (J1202) and the

line between the pin(2) of IC2003 and the VIDEO

OUT terminal (J1202).

YES

Are the pin(1) of IC2003 on "L" level?

Replace IC2003.

Check the DVD-H line.

Is 5V applied to the pin(3) of IC2003.

Check the PC 5V line.

RF output: Check Q1251 periphery and tuner pin(6)

periphery.

Is serial data clock signal applied to the pins(63)

and (62) of IC1201?

Picture E-E does not appear.

DV-NC55U/C/M

FLOW CHART NO.15

YES

Is luminance signal (approx. 0.5

Vp-p) input to the pin(19) of IC1201?

Is luminance signal (approx. 0.3

Vp-p) input to the pin(42) of IC1201?

Is luminance signal (approx. 0.5

Vp-p) input to the pin(26) of IC1201?

Is luminance signal (approx. 0.5

Vp-p) input to the pin(23) of IC1201?

Is the luminance signal (approx. 0.5

Vp-p) input and output to the pins(13)

and (14) of IC1201, respectively?

SP mode: Is record FM signal (approx. 20 mAp-p) output to the pins(88) and (89) (SP1) and pins(86) and (87) (SP2) of IC1201?

EP mode: Is record FM signal (approx. 20 mAp-p) output to the pins(93) and (94) (EP1) and pins(92) and (91) (EP2) of IC1201?

Check or replace the cylinder.

Check the pins(13) and (14) of

IC1201 peripheral circuit.

(R1201, R1202, C1203)

Is PRE/REC Vcc 5V applied to the pin(90) of IC1201?

Is chroma signal (approx. 180 mVp-p

/Burst) output to the pin(35) of

IC1201?

Check between the pins(58) and

(35) of IC1201. (Check R1505,

C1515.)

Check whether the pins(71) and

(73) of IC1201 oscillate (3.58 MHz)?

Check between the pins(60) and

(46) of IC1201. (Check C1512.)

Is chroma signal (approx. 143 mVp-p

/Burst) input into the pin(46) of

IC1201?

Is chroma signal (approx. 180 mVp-p

/Burst) input into the pin(58) of

IC1201?

Check between the pins(21) and

(42) of IC1201. (Check C1208.)

Check between the pins(39) and

(26) of IC1201. (Check C1212.)

Is luminance signal (approx. 0.5

Vp-p) input to the pin(39) of IC1201?

Is voltage 5V applied to the CCD section

power terminal pin(36) of IC1201?

Is CCD control voltage approx. 5V

applied normally to the pin(37)

from the pin(57) of IC1201?

Is clock signal (approx. 7.16 MHz/

0.5 Vp-p) for CCD applied normally

to the pin(44) from the pin(69) of

IC1201?

Is voltage 5V applied to the chroma

power terminal pin(61) of IC1201?

Check the periphery of pin(61) of

IC1201 and YC 5V line.

Check between the pins(18) and

(19) of IC1201. (Check C1206.)

Check between the pins(24) and

(23) of IC1201. (Check C1210.)

Picture (luminance) record is impossible (E-E mode is possible).

Although picture record is possible, color does not appear (E-E mode is possible).

DV-NC55U/C/M

FLOW CHART NO.16

NO NO

YES

YES YES

YES

YESNOYESNOYES YES

YES

Is FM signal (approx. 0.4 Vp-p)

input to the pin(78) of IC1201?

Is the luminance signal (approx.

0.25 Vp-p) input and output to the

pins(13), (14) and (16) of IC1201,

respectively?

Is luminance signal (approx. 0.5

Vp-p) input to the pin(19) of IC1201?

Is luminance signal (approx. 0.3

Vp-p) input to the pin(42) of IC1201?

Is luminance signal (approx. 0.5

Vp-p) input to the pin(26) of IC1201?

Is luminance signal (approx. 0.5

Vp-p) input to the pin(23) of IC1201?

Replace IC1201.

Check between the pins(79) and

(78) of IC1201.

Is luminance signal (approx. 0.4

Vp-p) input to the pin(79) of IC1201?

Is V-H.SW.P. applied to the pin

(81) of IC1201?

Check V-H.SW.P. line.

Check the periphery of pins(13), (14)

and (16) of IC1201. (Check C1203,

R1201-2, L1201, C1205, R1203.)

Check between the pin(18) and

pin(19) of IC1201. (Check C1206.)

Check between the pin(21) and

pin(42) of IC1201. (Check C1208.)

Check between the pin(39) and

pin(26) of IC1201. (Check C1212.)

Is luminance signal (approx. 0.5

Vp-p) input to the pin(39) of IC1201?

Is voltage 5V applied to the CCD section power terminal pin(36) of IC1201?

Is control voltage approx. 5V applied normally to the pin(37) from the pin(57) of IC1201? Is CCD clock signal

(approx. 7.16 MHz/0.5 Vp-p) applied to the pin(44) from the pin(69) of IC1201?

Check between the pins(24) and (23) of IC1201. (Check C1210.)

Replace IC1201.

Check between the pin(55) and

pin(54) of IC1201. (Check C1514.)

Is chroma signal (approx. 286

mVp-p/Burst) input into the pin

(54) of IC1201?

Is chroma signal (approx. 508

mVp-p/Burst) input into the pin

(58) of IC1201?

Check between the pin(58) and

pin(35) of IC1201.

(Check R1505, C1515.)

Is chroma signal (approx. 508

mVp-p/Burst) output to the pin

(35) of IC1201?

Check whether the pin(71) and pin

(73) of IC1201 oscillate (3.58 MHz)?

Check between the pin(60) and

pin(46) of IC1201. (Check C1512.)

Check the periphery of pin(61) of

IC1201 and YC 5V line.

Is voltage 5V applied to the chroma

power terminal pin(61) of IC1201?

Is chroma signal (approx. 403

mVp-p/Burst) input into the pin

(46) of IC1201?

Playback picture does not appear (E-E mode is possible). Although picture is played back, color does not appear (E-E mode is possible).

DV-NC55U/C/M

FLOW CHART NO.17

Check the peripheral circuit of front input terminal.

L-ch

R-ch

Front input terminal

Rear input terminal

YES

Tuner audio terminal

YES

Check the peripheral circuit of rear input terminal.

Check the regulater circuit of Hi-Fi 5V and PC 9V.

Replace IC1651.

Is there signal inputted at each

terminal of IC1651 as shown in table?

pin(15) pin(10)

pin(14) pin(9)

pin(48)

Is the voltage 5V applied to pin(40) of IC1651,

9V applied to pin(58).

Are serial data and clock signal at pins(43),

(42) of IC1651?

Line output terminal connection

Is the audio signal output respectively to the pins(53)

and (57) of IC1651?

Is "L" level applied at pin(36) of IC1651?

Is "H" level applied at pin(45) of IC1651?

Check line between pins(43), (42) of IC1651

and pins(17), (18) of IC1701.

YES

Is the audio signal input respectively to the pins

(13) and (1) of IC6010?

Check the line between the pins(53) and (57) of

IC1651 and the pins(13) and (1) of IC6010.

YES

Is the audio signal output respectively to the pins

(7) and (1) of IC6011?

Is 9V applied to the pin(8) of IC6011?

YES

Check the AUDIO OUT terminal (J1202) and the

line between the pins(7) and (1) of IC6011 and the

AUDIO OUT terminal (J1202).

Replace IC6011.

YES

Is the audio signal input respectively to the pins

(5) and (3) of IC6011?

Check the line between the pins(14) and (15) of

IC6010 and the pins(5) and (3) of IC6011.

YES

Is the audio signal output respectively to the pins

(14) and (15) of IC6010?

Is 9V applied to the pin(16) of IC6010.

Are the pins(9), (10) and (11) of IC6010 on "H" level?

YES

Replace IC6010.

Check the DVD-H line and Q6010.

Check the PC 9V line.

Check line between pin(36) of IC1651 and

pin(21) of IC1701.

Is Sub carrier signal (3.58MHz, about 900m

Vp-p) input to pin(45) of IC1651?

Check line between emitter of Q1501 and

pin(45) of IC1651.

YES

Check the line between the pin(59) of IC1651 and

the pin(2) of the tuner (TU1101).

RF output terminal connection

Is the audio signal output to the pin(59) of IC1651?

Is there SIF signal from pin(22) of Tuner?

No Hi-Fi E-E sound heard.

FLOW CHART NO.18

YES

Is terminal voltage (REC AGC. ADJ.) pin(37) of

IC1651 normal?

Is record FM signal output to the pins(21) to (24)

(ch-1)/pins(21) and (22) (ch-2) of IC1651?

Check the AH-MZ connector.

Replace IC1651.

Is the pin(29) of IC1651 about 3.7V?

Check Hi-Fi REC CTL line.

Is voltage 5V applied to pin(25) of IC1651.

Check line of Hi-Fi 5V.

Hi-Fi sound cannot be recorded (E-E mode is normal).

FLOW CHART NO.19

YES

Is playback envelope signal output to the pins(29)

and (30) of IC1651? (300 mVp-p)

Replace IC1651.

Is A-H.SW.P input into the pin(27) of IC1651?

Check the A-H.SW.P. line from the pin(27) of

IC1651 to the pin(26) of IC1701.

Hi-Fi sound cannot be played back (E-E mode is normal).

FLOW CHART NO.20

YESNOYESNOYES

YES

Is audio signal input into the IC1201 pin(8)?

Is the pin(99) of IC1201 in "L" level?

Does the bias oscillation circuit operate normally?

Is audio signal on which bias signal is superposed

output to the pin(4) of IC1201?

Check the AA-MH harness and A/C head.

Check the bias oscillation circuit (T1601, Q1602,

Q1603).

Check the R1617.

Check the line between the pin(61) of IC1651 to the

pin(8) of IC1201.

Recording in linear audio is impossible (Hi-Fi E-E mode is normal).

FLOW CHART NO.21

YES

YESNOYES

YES

Is it possible to confirm the audio signal (PB EQ)

on the pin(100) of IC1201?

Is audio signal output to the pin(11) of IC1201?

Check the line between the pin(11) of IC1201 to

the pin(62) of IC1651.

Are MH-AA harness and playback AMP. peripheral

parts normal?

Is the AC head surface clean?

Is AC head height adjusted properly?

Replace the AC head.

Readjust the A/C head height.

Is the pin(99) of IC1201 in "L" level?

Check the R1617.

Replace IC1201.

Linear audio playback is impossible. (Hi-Fi E-E mode is normal).

DV-NC55U/C/M

FLOW CHART NO.1

YES

YESNOYESNOYES

Are STBY 44V, AT 23V, PC 12V, STBY –24V,

STBY 5V and filament voltage lines normal?

Is the fuse good?

Is the normal state restored when once unplugged

power cord is plugged again after several seconds?

Is "H" level applied at pin(1) of IC1701?

The fuse blows out even when it is

replaced with new one.

See FLOW CHART NO.2 <Fuse blown out.>.

Check for leak or short-circuiting of primary circuit

part.(L901, D901, T901, Q901-902, etc.)

Check each rectifier circuits and short-circuit of

secondary circuit.

Check the power failure circuit. (Q1705)

Are AT 5V voltage line normal?

No power

FLOW CHART NO.2

Check for leak or short-circuiting of primary

circuit part. (L901, D901, T901, C906, R905,

Q901-902, etc.)

Check for short-circuiting of rectifying diode and

circuit in each rectifying circuit of secondary circuit.

(D9001, D9003-5, D9010-11)

Case (2)

Case (1)

Fuse blown out.

FLOW CHART NO.3

Is the photocoupler circuit on the secondary side

operating normally?

YESNOYES

Is the control of photocoupler circuit on the primary

side operating normally?

Replace D905.

Check the circuit and replace parts.(D905, D9006, etc.)

Check the circuit and replace parts.

(D905, D9006, Q902, etc.)

FLOW CHART NO.4

Check for short-circuiting of circuit and rectifying diode of each rectifying circuit of secondary

circuit and check for failure of shunt regulator circuit. (D9001, D9003-5, D9010-11, D9006, C9009-10)

When the output voltage varies.

When buzz is heard from the vicinity of power circuit.

FLOW CHART NO.5

Does the change from STANDBY LED indicate

turn-off?

Check the AT 5V line.

YES

Is the supply voltage of 5V fed to pin(9) of IC8201?

Check the IC8202.

Is the supply voltage about 5V fed to pin(11) of

IC8201?

Check the FL8201 and IC8201.

Is there 4.0MHz oscillation at pins(6) and (8) of

IC8201?

Check the S5001 and POWER KEY line.

Does the "L" signal inputted at pin(13) of IC8201,

when the POWER button activated on the DVD?

Replace IC8201.

The STANDBY LED indicate it flashing after 0.5sec.

Are the "H" pulse inputted into the pin(33) of

IC8201?

Check the line between the remote control

receiver and the pin(10) of IC8201.

Does the remote control "L" signal inputted at

pin(10) of IC8201, when the POWER button

activated on the remote control unit?

Replace IC8201.

Are the "P–CON(L)" pulse outputted from the

pin(32) of IC8201?

Check each component and if poor the replace.

Check or replace D9091-98.

Does the P–CON switch circuit is operate

normally? (Q9053, Q9071, Q9073-74, IC9053-54)

The DVD power cannot be turned on.

YES

Yes (below, confirmed operating at LED turn-off of 0.5sec interval.)

(POWER)

DV-NC55U/C/M

YES

PC 9V is not output.

FLOW CHART NO.6

Check the secondary circuit, AT 12V and PC 12V

switch(Q9053) circuit.

Is voltage of 9V sent out from the pin(2) of IC9051?

Check for load circuit short-circuiting or leak.

Check the IC9051 periphery circuit.

Are the "H" pulse inputted into the pin(9) of IC8201?

Does the P-CON switch circuit is operate ally?

(Q9056-7, Q9053, D9054, D9052, etc.)

Check each component and if poor the replace.

Replace IC8201.

Check or replace D9091-8.

FLOW CHART NO.7

Is 12V voltage supplied at pin(1) of IC9052? Check the PC 12V line.

Is voltage of 8V sent out from the pin(2) of IC9052?

Check for load circuit short-circuiting or leak.

Check the IC9052 periphery circuit.

Replace IC9052.

Is 12V voltage supplied at pin(1) of IC9051?

PC 8V is not output.(PC 9V is possible)

FLOW CHART NO.8

Is 5V voltage supplied at emitter of Q9054? Check the AT 5V line.

Is voltage of 5V sent out from the collector of

Q9054?

Check for load circuit short-circuiting or leak.

Check the Q9054 periphery circuit.

Does the P-CON switch circuit is operate

normally? (Q9056-7, D9054, D9053, etc.)

Check each component and if poor the replace.

Are the "H" pulse inputted into the pin(9) of

IC8201?

Replace IC8201.

Check or replace D9091-8.

YES

PC 5V is not output.

FLOW CHART NO.9

Is -19V voltage supplied at emitter of Q8202?

Check the AT -19V line.

Is voltage of -19V sent out from the collector of

Q8202?

Check for load circuit short-circuiting or leak.

Check the Q8202 periphery circuit.

Are the "H" pulse inputted into the pin(32) of

IC8201?

Does the P-CON switch circuit is operate normally?

(Q8201, etc.)

Check each component and if poor the replace.

Replace IC8201.

Check or replace D9091-8.

FLOW CHART NO.10

Is 5V voltage supplied at pin(1) of IC9053? Check the secondary circuit, AT 5V line.

Is voltage of 3.3V sent out from the pin(2) of IC9053?

Check for load circuit short-circuiting or leak.

Check the IC9053 periphery circuit.

Are the "H" pulse inputted into the pin(9) of IC8201?

Does the P-CON switch circuit is operate normally?

(Q9056-7, D9054, D9053, etc.)

Check each component and if poor the replace.

Replace IC8201.

Check or replace D9091-8.

YES

YESNOYES

YES

PC -19V is not output.

PC 3.3V(1), (2) is not output.

FLOW CHART NO.11

Is 5V voltage supplied at pin(1) of IC9054?

Is voltage of 2.5V sent out from the pin(2) of

IC9054?

Check the secondary circuit, AT 5V line.

Check for load circuit short-circuiting or leak.

Check the IC9054 periphery circuit. Replace IC9054.

YES

PC 1.8V is not output.(PC 3.3V(1), (2) is possible)

DV-NC55U/C/M

11. IC FUNCTION LIST

11-1. IC301 TA1323F RF PROCESSOR

Pin No. Terminal name I/O Operation function

1 GND – GND terminal. – 2 P2TP I TE+input (CD) VrA 3 P2TN I TE–input (CD) VrA 4 LDO2 O Drive ouput 2 – 5 MDI2 I Monitor input 2 – 6 VrD O Digital VREF – Vdd/2 output (1.65V) 7 Vrfil – Filter capacity for reference – 8 Vdd I Power terminal – 3.3V is connected.

9 DPAC – DPD AC combination capacity 1 – 10 DPBD – DPD AC combination capacity 2 – 11 DPD1 – DPD integral capacity 1 – 12 DPD2 – DPD integral capacity 2 – 13 SCB I Control line (Bit clock) 2.2[V] 14 SCL I Control line (Latch signal) 2.2[V] 15 SCD I Control line (Sirial Data) 2.2[V] 16 VRCK I Reference clock input 2.3[V] When frequency is increased, the

17 VCKF – Capacity for VRCK time constant –

adjustment 18 VccP – Power terminal – 19 LVL O Servo addition output VrD/2 20 TEO O TE output VrD 21 FEO O FE output VrD 22 DFTN I DPD difect – Low DPD output: Mute 23 VccS – Power terminal (servo) – 24 NC – – – Used in the open state. 25 RPZ O RF ripple output 2 VrD 26 RPO O RF ripple output 1 VrD/2 27 RPB – RF ripple bottom – 28 RPP – RF ripple peak – 29 RFOn O Equivalent RF output 1.65[V] DC voltage varies by RFS.

(Differential output) 30 RFOp O Equivalent RF output 1.65[V] DC voltage varies by RFS.

(Differential output) 31 VccR – Power terminal (RF) – 32 RFS I RF slice level adjustment – 33 TEB I TE balance VrD When TEB is raised, the gain on the

34 FEB I FE balance VrD When FEB is raised, the gain on the

35 DPDB I Pit depth adjustment VrD When DPDB is raised, the delay

36 Vcc2 – Power terminal – 37 NC – – – Used in the open state. 38 NC – – – Used in the open state. 39 GND2 – GND terminal. – 40 TCC1 I Time constant adjustment – 41 RFDC – DC feedback capacity – 42 VrA O Analog VREF 2.1[V] 43 EQB I Boost adjustment VrD

Terminal DC Voltage(TYP.)

Remarks

filters excepting the servo LPF are shifted to high frequency side.

TP side and the delay amount on the A+C side are increased. Adjusting range: GND - Vdd

A+C (FP) side is increased. Adjusting range: GND - Vdd

amount on the A•B side is increased. Adjusting range: GND - Vdd

When EQB is raised, the boost increases. Adjusting range: GND - Vdd

DV-NC55U/C/M

Pin No. Terminal name I/O Operation function

Terminal DC Voltage(TYP.)

Remarks

44 EQF I Frequency adjustment VrD When EQF is raised, shift to the

high frequency side occurs.

Adjusting range: GND - Vdd 45 MDI1 I Monitor input 1 – 46 LDO1 O Drive output 1 – 47 P1TN I TE–input (DVD) VrA 48 P1TP I TE+input (DVD) VrA 49 P1FN I FE–input (DVD) VrA 50 P1FP I FE+input (DVD) VrA 51 LDP1 I APC polarity 1 – Positive polarity when this terminal

is connected to Vcc. 52 P1DI I D input (DVD) VrA 53 P1CI I C input (DVD) VrA 54 P1BI I B input (DVD) VrA 55 P1AI I A input (DVD) VrA 56 GNDR – GND terminal (RF) – 57 LDP2 I APC polarity 2 – Positive polarity when this terminal

is connected to Vcc. 58 P2AI I A input (CD) VrA 59 P2BI I B input (CD) VrA 60 P2CI I C input (CD) VrA 61 P2DI I D input (CD) VrA 62 GNDS – GND terminal (Servo) – 63 P2FP I FE+input (CD) VrA 64 P2FN I FE–input (CD) VrA

• Block Diagram

P1FN P1FP LDP1 P1DI P1CI P1BI P1AI GNDR LDP2 P2AI P2BI P2CI P2DI GNDS P2FP P2FN

P1TP

P1TN

LDO1

MDI1

EQF

EQB

VrA

RFDC

TCC1

GND2NCNC

Vcc2

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

APC1

50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

sel-PD

sel-RF

APC2

F-gain Adjust

T-gain Adjust

R-gain Adjust

mode-IC

sel-FE

sel-TE

sel-DPD

3Beam-TE

creation

sel-LVL

VrA

Vref

RF Ripple

creation

FE creation

DPDB

DPD-TE creation

FEB

TEB

mode-TE

tcc1 (BUS)

Output

Amp

FE-gain

Adjust

TE-gain

Adjust

Level

detect

TCC1

BUS

DPDB

FEB

Time

constant

adjustment

TEB

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

RFS VccR RFOp RFOn RPP RPB RPO RPZ NC VccS DFTN FEO TEO LVL VccP VCKF

1 2 3 4 5 6 7 8 9

rfil

GND

P2TP

P2TN

LDO2

MDI2

10 11 12 13 14 15 16

DPAC

DPBD

DPD1

DPD2

SCB

SCL

SCD

RCK

DV-NC55U/C/M

11-2. IC501 IX1689GE FLASH MEMORY

Pin No. Symbol Type Name and function

Byte selection address: When the device is in the x8 mode, the low or high order byte is

45 DQ

25-18, 8-4 A

3-1, 48,

16, 17 during data writing, erasing and lock block operation.

0-A12

13-A18

15/A-1

29, 31, 33, Low order byte data input/output: Command user interface writing cycle data and command 35, 38, 40, DQ

-DQ7Input/Output

42, 44 output disable: Float state

30, 32, 34, 36,

39, 41, 43, 45 data input/output. Operative only in x16 mode. x8 mode: Float state DQ15/A-1 is address.

-DQ14Input/Output

26 CE# Input

12 RP# Input

28 OE# Input

11 WR# Input controlled. In “Low” state WR# becomes active. At rise edge the address and data are

14 WP# Input Blanking to the boot block area and writing actuation can't be executed at the time of

15 RY/BY# Output

47 BYTE# Input the DQ

13 Vpp ——— Write/erase power supply: 5.0 ± 0.5V is applied during writing/erasing. 37 Vcc ——— Device power supply: 5.0 ± 0.5V

27, 46 GND ——— Ground

9, 10 NC ——— Nonconnection

Input selected. It is not used in the x16 mode.

(If BYTE# is high, DQ15/A-1 input circuit does not operate.)

Input

Word selection address: Selection of one word of 16k byte block. These addresses are latched during data wiring operation. Block selection address: Selection of 1/32 erase block. These addresses are latched

input. Various data read memory identifier and status data output Chip nonselection or

High order byte data input/output: The function is the same as that of low order byte

Chip enable: Device control logic, input buffer, decoder and sense amp. are activated. Chip becomes active only when CE# is “Low”. Reset/Power down: If RP# is set to “Low”, the control circuit is initialized when power is turned on. Hence, the RP#pin is set to “Low”. When power is turned on or off or in case of fluctuation it is kept at “Low” so as to protect data from noise. When RP# is in “Low” state, the device is in deep power down state. 480 ns is required to recover from the deep power down state. If the RP# pin becomes “Low”, the whole chip operation is interrupted and reset. After recovery the device is set to array read state. Output enable: When OE# is set to “Low”, data is output from the DQ pin. When OE# is set to “High”, the DQ pin is set to float state. Write enable: Command user interface, data Q register and address Q latch access is

fetched. Write protection: Blanking/writing to the boot block area is input of prohibition control.

WP#=VIL. Ready/busy: The state of internal write state machine is output. In “Low” state it is indicated that the write state machine is in operation. If the write state machine waits for next operation instruction, erase is suspended or it is in deep power down state, the RY/BY# pin is in float state. Byte enable: When BYTE# is set to “Low”, the device is set to the x8 mode. At this time

-DQ15 pin becomes float state. Address A-1 selects high order/low order byte.

When BYTE# is “High”, the device is set to the x16 mode. The A-1 input circuit is disabled.

DV-NC55U/C/M

• Block Diagram

-1.0~18

Buffer

ADDRESS

QUEUE

LATCHES

ADDRESS COUNTER

Input

Output

Buffer

Y-DECODER

X-DECODER

8-14

OUTPUT MULTIPLEXER

Block 0

16-KBYTE

Output Buffer

CSR

ESRs

Data

Comparator

Y GATING/SENSING

Block 1

16-KBYTE

0-7

Input

Buffer

DATA

QUEUE

Block 30

16-KBYTE

Block 31

Input

Buffer

I/O Logic

CUIWSM

CE# OE# WR#

RP#

Program Erase Voltage Switch

BYTE#

RY/BY#

GND

11-3. IC502 IX1765GE 4M EDO DRAM

Terminal Terminal name Function

16-19, 22-26 A0-A8 Address inputs.

14 RAS Row address strobe. 28 UCAS Column address strobe/upper byte control. 29 LCAS Column address strobe/lower byte control. 13 WE Write enable. 27 OE Output enable.

2-5, 7-10 DQ1-DQ16 Data inputs/outputs.

31-34, 36-39

1, 6, 20 VCC +3.3V power supply.

21, 35, 40 VSS 0V ground.

11-12, 15, 30 NC No connection.

• Block Diagram

A0 A1

A7 A8

UCAS

LCAS

RAS

V V

RAS clock

generator

CAS clock

generator

WE clock

generator

Data I/O Bus

0-Y8

Row

decoders

Column decoders

Sense amplifiers

512 16

Memory

512

Refresh counter

Address buffers

and predecoders

X0-X

array

OE clock

generator

I/O

Buffer

I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 I/O9 I/O10 I/O11 I/O12 I/O13 I/O14 I/O15 I/O16

DV-NC55U/C/M

11-4. IC504 IX1687GE MICRO COM.

• Block Diagram

VccVccVccVccVccVssVssVssVssVssVssVssVssPD

/D PE

Port EPort D

EXTAL XTAL STBY RES WDTOVF NMI

PF7/Ø

/AS

/RD

/HWR

PF3/LWR PF2/

LCAS/WAIT/BFEQO PF1/BACK PF0/BREQ

PG4/CS0 PG3/CS1 PG2/CS2 PG1/CS3 PG0/CAS

P67/CS7/IRQ3 P66/CS6/IRQ2 P65/IRQ1 P64/IRQ0 P63/TEND1 P62/DREQ1 P61/TEND0/CS5 P60/DREQ0/CS4

Port GPort 6 Port F

Clock oscillator

Interruption

controller

ROM

RAM

TPU

PPG

H8S/2000 CPU

DTC

DMAC

WDT

SCI

D/A converter

A/D converter

Internal addressbus

Internal data bus

Bass Controller

Peripheral address bus

Peripheral data bus

Port 5 Port 3 Port C Port B Port A

PA7/A23/IRQ7 PA

/IRQ6

6/A22

PA5/A21/IRQ5 PA4/A20/IRQ4 PA

3/A19

PA2/A

PA1/A

PA0/A

PB7/A

PB6/A

PB5/A

PB4/A

PB3/A

PB2/A

PB1/A

PB0/A

PC7/A

PC6/A

PC5/A

PC4/A

PC3/A

PC2/A

PC1/A

PC0/A

P35/SCK1 P3

/SCK0

/RxD1

/RxD0

/TxD1

/TxD0

P53/ADTRG

Port 1 Port 2 Port 4

ref

AVccAV

/PO0/TIOCA3

/PO1/TIOCB3

/PO2/TIOCC3

/PO3/TIOCD3

/PO4/TIOCA4

/PO5/TIOCB4

/PO6/TIOCA5

/PO8/TIOCA0/DACK0

/PO9/TIOCB0/DACK1

/PO10/TIOCC0/TCLKA

/PO11/TIOCD0/TCLKB

/PO12/TIOCA1

/PO13/TIOCB1/TCLKC

/PO14/TIOCA2

/PO15/TIOCB2/TCLKD

/PO7/TIOCB5

/AN7/DA1

/AN6/DA0

/AN5

/AN4

/AN3

/AN2

/AN1

/AN0

11-5. IC508 IX1761GE TRACK BUFFER INTERFACE

Pin No. Terminal name I/O Operation function

1 VDD1 Supply Digital power supply +3.3V 2 HADR0 Input CPU Address bus 3 HADR1 Input CPU Address bus 4 HADR2 Input CPU Address bus 5 HADR3 Input CPU Address bus 6 HADR4 Input CPU Address bus 7 HADR5 Input CPU Address bus 8 HADR6 Input CPU Address bus

9 HADR7 Input CPU Address bus 10 VSS Supply Digital GND 11 VDD1 Supply Digital power supply +3.3V 12 HDAT0 In/Output CPU Data bus 13 HDAT1 In/Output CPU Data bus 14 HDAT2 In/Output CPU Data bus 15 HDAT3 In/Output CPU Data bus 16 HDAT4 In/Output CPU Data bus 17 HDAT5 In/Output CPU Data bus 18 HDAT6 In/Output CPU Data bus 19 HDAT7 In/Output CPU Data bus 20 HRD Input CPU Read signal 21 HWR Input CPU write signal 22 HAS Input CPU address strobe 23 HCS1 Input CPU chip select signal 1 (Track Buffer Operation) 24 HCS2 Input CPU chip select signal 2 (bus Voltage Transfer) 25 VSS Supply Digital GND 26 VDD1 Supply Digital power supply +3.3V 27 HWAIT Output CPU wait signal (Open drain) 28 HINT Output CPU interrupt signal (Open drain) 29 VSS Supply Digital GND 30 PDO[0] Output Output DVD/CDdata 31 PDO[1] Output Output DVD/CDdata 32 PDO[2] Output Output DVD/CDdata 33 PDO[3] Output Output DVD/CDdata 34 PDO[4] Output Output DVD/CDdata 35 PDO[5] Output Output DVD/CDdata 36 PDO[6] Output Output DVD/CDdata 37 PDO[7] Output Output DVD/CDdata 38 PDO[8] Output Output DVD/CDdata 39 VSS Supply Digital GND 40 VDD1 Supply Digital power supply +3.3V 41 PSYCO Output Output data selector sync signal 42 PDRQO Output Output data transfer block signal 43 PDCKO Output Output data transfer clock 44 VSS Supply Digital GND 45 VDD2 Supply Digital power supply +5V 46 DVDREQ Input Request signal input 47 PDCKI Input Input data transfer clock 48 PDRQI Input Input data transfer block signal 49 PSYCI Input Input data selector sync signal 50 VSS Supply Digital GND 51 VDD2 Supply Digital power supply +5V

DV-NC55U/C/M

Pin No. Terminal name I/O Operation function

52 PDI[8] Output Input DVD/CD data 53 PDI[7] Output Input DVD/CD data 54 PDI[6] Output Input DVD/CD data 55 PDI[5] Output Input DVD/CD data 56 PDI[4] Output Input DVD/CD data 57 PDI[3] Output Input DVD/CD data 58 PDI[2] Output Input DVD/CD data 59 PDI[1] Output Input DVD/CD data 60 PDI[0] Output Input DVD/CD data 61 VSS Supply Digital GND 62 VDD1 Supply Digital power supply +3.3V 63 VSS Supply Digital GND 64 VDD2 Supply Digital power supply +5V 65 5VBUS[7] In/Output CPU bus 5V conversion input/output 66 5VBUS[6] In/Output CPU bus 5V conversion input/output 67 5VBUS[5] In/Output CPU bus 5V conversion input/output 68 5VBUS[4] In/Output CPU bus 5V conversion input/output 69 5VBUS[3] In/Output CPU bus 5V conversion input/output 70 5VBUS[2] In/Output CPU bus 5V conversion input/output 71 5VBUS[1] In/Output CPU bus 5V conversion input/output 72 5VBUS[0] In/Output CPU bus 5V conversion input/output 73 NC – Not Connect 74 NC – Not Connect 75 VSS Supply Digital GND 76 VDD1 Supply Digital power supply +3.3V 77 5VBUFO[B] Output 5V buffer output B 78 5VBUFI[B] Output 5V buffer input B (3.3V input) 79 5VBUFO[A] Output 5V buffer output A 80 5VBUFI[A] Output 5V buffer input A (3.3V input) 81 GPO[3] Output General-purpose output terminal (CPU control) 82 GPO[2] Output General-purpose output terminal (CPU control) 83 GPO[1] Output General-purpose output terminal (CPU control) 84 GPO[0] Output General-purpose output terminal (CPU control) 85 VSS Supply Digital GND 86 VDD1 Supply Digital power supply +3.3V 87 LI[1] Input Gate Input[1] 88 LI[2] Input Gate Input[2] 89 BUFO[C] Output Schmitt trigger buffer output C 90 BUFI[C] Input Schmitt trigger buffer input C 91 BUFO[B] Output Schmitt trigger buffer output B 92 BUFI[B] Input Schmitt trigger buffer input B 93 BUFO[A] Output Schmitt trigger buffer output A 94 BUFI[A] Input Schmitt trigger buffer input A 95 TEST0 Input Test terminal 0 (Normal: Low, Test: Hi) Function 96 TEST1 Input Test terminal 1 (Normal: Low, Test: Hi) RAM 97 TEST2 Input Test terminal 2 (Normal: Low, Test: Hi) Pin 98 NC – Not Connect 99 MRST Input 27MHz Input terminal

100 VSS Supply Digital GND

• Block Diagram

VSS

75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51

5VBUS[0]

5VBUS[1]

5VBUS[2]

5VBUS[3]

5VBUS[4]

5VBUS[5]

5VBUS[6]

VSS

VDD2

5VBUS[7]

VDD1

VSS

PDI[0]

PDI[1]

PDI[2]

PDI[3]

PDI[4]

PDI[5]

PDI[6]

PDI[7]

PDI[8]

DV-NC55U/C/M

VDD2

VDD1

5VBUFO[B]

5VBUFI[B]

5VBUFO[A]

5VBUFI[A]

GPO[3] GPO[2] GPO[1] GPO[0]

VSS

VDD1

LI[1] LI[2]

BUFO[C]

BUFI[C]

BUFO[B]

BUFI[B]

BUFO[A]

BUFI[A]

TEST0 TEST1 TEST2

MRST

VSS

76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

Interface

GPO

Detect

Memory

CTL

RAM

(4.2Kbyte)

Host

Interface

Error

Detect

IPD

Interface

Timing

Gen.

Interface

OPD

50 49 48 47 46

DVDREQ 45 44 43 42

PDRQO 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26

VSS PSYCI PDRQI PDCKI

VDD2

VSS

PDCKO

PSYCO

VDD1

VSS

PDO[8] PDO[7] PDO[6] PDO[5] PDO[4] PDO[3] PDO[2] PDO[1] PDO[0]

VSS

HINT

HWAIT

VDD1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

VDD1

HADR0

HADR1

HADR2

HADR3

HADR4

HADR5

HADR6

HADR7

VSS

VDD1

HDAT0

HDAT1

HDAT2

HDAT3

HDAT4

HDAT5

HDAT6

HDAT7

HRD

HWR

HAS

HCS1

HCS2

VSS

DV-NC55U/C/M

11-6. IC601 IX1720GE AV DECODER

• Terminal description

Name Type Description

Host interface, CD-DSP interface, sub-code interface (32-pin) RESET# ID

STANDBY# ID

IDLE O(p.u.)

HWID ID only. The host interface of the device is set to 8 bits at the low level (GNDP) and 16

HORD ID

HTYPE ID HD[7:0] I/O 8 I.s. of the host data bus. When HWID input is connected to GNDP, only this signal

(HD[7:4]) (r.t.) is defined as the host data signal. When HWID is connected to VDDP, it is used as (HD[3]) (p.u.) an 8 I.s. line of 16-bit data bus. (HD[2:1]) (r.t.) (HD[0]) (p.u.)

HD[11:8] I/O When HWID is connected to VDDP, it is used as a data line 11:8 of the 16-bit host

(HD[11]) (p.d.) data bus. (HD[10:8]) (r.t.)

HD[15:12] I/O(r.t.) data bus. When HWID is connected to GNDP, it is used as a the CD-DSP serial input

CDCLK (HD[12]) I CD-DSP bit clock input CDDAT (HD[13]) I CD-DSP data input CDFRM (HD[14) I CD-DSP LR clock (frame) input CDERR (HD[15]) I CD-DSP data error input

HA[3:0] I HCS# I Host chip select input. Active Low.

HWR# (HR/W#) I the host access.

HRD# (HDS) I

Reset input (active Low). When shifting from the assert state to deassert state, initialization process of this device is started. Stand-by input (active Low). When asserting with RESET#, all of output pins and bidirectional pins enter the float state, and this device is electrically separated from periphery. All internal operations are stopped and the power consumption is minimized. In the stand-by mode, the contents of SDRAM and setup parameter are not retained. Idle, Init, or Reset state display output (active High). It enters the active state after resetting. Data bus width of the host interface is determined. It can be changed during resetting

bits at the high level (VDDP). When the width is 16 bits (HWID is VDDP), byte order of the host interface data bus is determined. It can be changed during resetting only. The device is set to input/ output m.s. byte HD at [15:8] at the low level (GNDP), and m.s. byte at [7:0] at the high level. When HWID is at the GNDP level, it is connected to GNDP. Protocol of the host bus is determined. It can be changed during resetting only. The device is set to A type at the low level (GNDP) and B type at the high level (VDDP).

When HWID is connected to VDDP, it is used as a data line 15:12 of the 16-bit host

port pin as defined below.

Host address input. The address signal specifying the physical address in this device is input.

Host protocol A type (HTYPE=GNDP): HR/W#. This input determines the direction of

Host protocol B type (HTYPE=VDDP): HWR#. Host write input (active Low). Host protocol A type (HTYPE=GNDP): HDS#. Data strobe input (active Low). \Host protocol B type (HTYPE=VDDP): HRD#. Host read input (active Low).

Glossary

I Input O Output I/O Bidirectional AI Analog input AO Analog output AI/O Analog bidirectional ID Input not synchronized p.u. Terminal internally p.d. Terminal internally

with PCLK pulled up pulled down

r.t. Retained terminal

DV-NC55U/C/M

Name Type Description

Host interface, CD-DSP interface, sub-code interface (32-pin)...continued

Host ready output (active High). Use this signal when the stream is transferred via the host bus. External pull-up resistor is required. Prior to transfer of each packet (1

HRDY O(p.d.) packet: length in CodBurstLen bytes), make sure that this signal is in the active state,

and then bit streams of CodBurstLen byte long or shorter can be written on this device consecutively. Interrupt request (active Low). This is deasserted when the host reads the interrupt status register of this device and also when the host masks or resets the interrupt

HIRQ# O(p.u.) using the interrupt mask register.

When HIRQ# is not asserted, it enters the 3-state mode. (External pull-up resistor is required.) Host acknowledge output (active Low). When the protocol is A type, the device asserts this output and notifies the completion of read or write cycle.

HACK# O(p.u.) When this signal is not active, it enters the 3-state mode. (External pull-up resistor is

required.) When the protocol is B type, this signal functions as a wait output signal. If the high-speed host (microcomputer) is used, this signal may not have to be connected.

GPI/O signal (3-pin) GPIO I/O(r.t.)

GPSI I General-purpose input monitored by the DVP micro code. GPSO O(p.d.)

PLL signal (5-pin) GCLK ID 27,000 MHz clock or crystal input for main processor. GCLK1 ID 27,000 MHz master clock input for audio. Normally, this must be connected to GCLK.

XO AO

PLLCFG[1:0] ID Analog video port (7-pin)

CVBS/G/Y (DAC A)

Y/R/V (DAC B)

C/B/U (DAC C)

CVBS/C (DAC D) RSET AI Resistance load for DAC gain adjustment is inserted between GND and DAC. VREF AI Reference voltage for DAC gain adjustment is input.

COSYNC O(p.d.) Digital video port (5-pin)

VCLKx2 I/O(r.t.) Main video clock input or output. 27,000 MHz. VCLK I/O(r.t.) Divided VCLKx2 signal. Used as a qualifier of data and sync signal. HSYNC I/O(r.t.) Horizontal sync bidirectional signal pin. Its polarity and length are programmable. VSYNC I/O(r.t.) Vertical sync bidirectional signal pin. Its polarity and length are programmable. FI I/O(r.t.) Field identification bidirectional signal pin. Its polarity is programmable.

AO For RGB, the G signal is output.

AO For RGB, the R signal is output.

AO For RGB, the B signal is output.

AO The CVBS or C signal is selected and output.

General-purpose bidirectional pin monitored and controlled by the ADP micro code. After resetting, this pin is defined as an input. It can be set by using the ADP command.

General-purpose output controlled by the DVP micro code. After resetting, output from this pin is switched to Low.

Output to crystal connected to GCLK. If the crystal is not used for GCLK, nothing must be connected to XO. PLL configuration input. It can be changed only during resetting. Normally, both pins must be connected to GNDP.

For CVBS, the composite video signal is output.

For YUV, the Y signal is output. For CVBS, the Y signal is output.

For YUV, the V signal is output. For CVBS, the C signal is output.

For YUV, the U signal is output.

Composite sync output. Effective only when the RGB analog output is selected. Otherwise, it is fixed to Low.

DV-NC55U/C/M

Digital audio port (8-pin) AMCLK I/O(p.u.)

S/PDIF (AOUT[3]) O(p.d.)

AOUT[2:0] O(p.d.) AIN I Serial input of PCM stereo audio for ADC. ALRCLK O(p.d.)

ABCLK O(p.d.) DVD-DSP interface (13-pin)

DVDREQ O(p.d.) DVD-DSP data request output (polarity programmable). DVDVALID I DVD-DSP data effective input (polarity programmable). DVDSOS I DVD-DSP data sector start input (polarity programmable). DVDDAT[7:0] I DVD-DSP data input bus. DVDSTRB ID DVD-DSP data bit strobe (clock) input. Polarity programmable. DVDERR I DVD-DSP error input. Polarity programmable. SDRAM interface (35-pin) RAMDAT [15:0] I/O(r.t.) SDRAM bidirectional data bus. RAMADD [11:0] O(p.d.) SDRAM address bus output. RAMRAS# O(p.u.) SDRAM row selection (active Low) output. RAMCAS# O(p.u.) SDRAM column selection (active Low) output. PCLK O(p.d.) SDRAM clock output (same as the internal processing clock). RAMDQM O(p.d.) SDRAM data masking (active High) output. RAMCS0# O(p.u.) SDRAM chip select (active Low) output. Lower 2 Mbyte device. RAMCS1# O(p.u.) SDRAM chip select (active Low) output. Upper 2 Mbyte device. RAMWE# O(p.u.) SDRAM write enable (active Low) output. TEST signal (pin 3) SCNENBL ID Test pin. Normally connected to GNDP. TESTMODE ID Test pin. Normally connected to GNDP. ICEMODE ID Test pin. Normally connected to VDDP. Power signal (49-pin) GNDP S Ground for 3.3V digital power supply. VDDP S 3.3V digital power supply VDDIP S 3.3V digital power supply GNDAAM S Ground for PLL power supply for 3.3V AMCLK generation. VDDAAM S PLL power supply for 3.3V AMCLK generation. GNDC S Ground for 1.8V digital power supply. VDDC S 1.8V digital power supply. GNDA S Ground for PLL power supply for 1.8V internal clock generation. VDDA S PLL power supply for 1.8V internal clock generation. VDDD S Analog power supply for 3.3V video DAC. GNDDAC [D,B,P,S]

Name Type Description

Audio master clock I/O. Sampling frequency can be selected among 384fs, 256fs, 192fs, and 128fs (programmable). S/PDIF transmitter output. It can be connected to DAC as the fourth audio output (AOUT [3]). After resetting, this pin outputs the low-level signal. Serial output of PCM stereo audio for DAC. After resetting, this pin outputs the lowlevel signal.

LR clock output of AOUT [4:0] and AIN. The square wave is formed with the sampling frequency. The LR polarities are programmable. Bit clock output of AOUT [4:0] and AIN. AOUT is output to this clock in the leading and trailing edges (programmable) and AIN is latched.

S Ground for Analog power supply for 3.3V video DAC.

• Block Diagram

GCLKXOPLLCFG0

GCLK1

VDDC

PLLCFG1

GNDC

AIN

ICEMODE

VREF

GNDDAC_S

GNDDAC_P

RESET

GNDDAC_B

C/B/UDAC_C

Y/R/VDAC_B

VDDD

CVBS/C/DAC_D

CVBS/G/Y/DAC_A

GNDDAC_D

COSYNC

VDDIP

VDDP

GNDPFIHSYNC

VDDP

VSYNC

VCLK

RAMDAT0

RAMDAT15

VDDP

RAMDAT1

RAMDAT14

GNDP

RAMDAT2

RAMDAT13

VDDP

RAMDAT3

RAMDAT12

DV-NC55U/C/M

VDDA

STNDBY#

GNDA

RESET#

SCNENBL

VDDP

VCLKx2

GNDP

TESTMODE

VDDAAM

AMCLK

GNDAAM

S/PDIF/AOUT3

GPIO

VDDP AOUT0 AOUT1 AOUT2

ALRCLK

VDDP ABCLK

VDDC GPSO GNDC

GPSI

GNDP DVDERR DVDSOS

DVDVALID

DVDSTRB

DVDREQ

DVDDAT0 DVDDAT1 DVDDAT2 DVDDAT3 DVDDAT4 DVDDAT5 DVDDAT6 DVDDAT7

IDLE

130

140

150

160

120

110

100

TOP VIEW

GNDP RAMDAT4 RAMDAT11 VDDP RAMDAT5 RAMDAT10 RAMDAT6 GNDC RAMDAT9 VDDP RAMDAT7 GNDP RAMDAT8 VDDP PCLK GNDP RAMDQM VDDC RAMWE# RAMCAS# RAMRAS# RAMCS1# VDDP RAMCS0# GNDP RAMADD11 RAMADD9 RAMADD10 VDDP RAMADD8 RAMADD0 GNDP RAMADD7 RAMADD1 RAMADD6 RAMADD2 VDDP RAMADD5 RAMADD3 RAMADD4

HWID

HORD

VDDP

HTYPE

HD15/CDERR

GNDP

HD11/TCK

HD10/TMS

HD12/CDCLK

HD13/CDDAT

HD14/CDFRM

VDDC

GNDC

HD9/TDO

HD7

VDDP

HD8/TDI

HD6

HD5

VDDIP

HD4

HD3

HD2

HD1

HD0

HA3

VDDP

HA2

HA1

HA0

HCS#

VDDC

HWR#/HDS#

VDDP

HRDY

GNDC

HIRQ#

HRD#/HDS#

GNDP

HACK#

DV-NC55U/C/M

11-7. IC602-3 IX3455CE 16M SDRAM

Pin No.

35 CLK Clock The system clock input. All other inputs are referenced to the SDRAM on

34 CKE Clock Enable Controls internal clock signal and when deactivated, the SDRAM will

18 CS Chip Select Command input enable or mask except CLK, CKE and DOM 19 BS Bank Address Select either one of banks during both RAS and CAS activity.

20~24 A0~A10 Address Row Address: RA0~RA10, Column Address: CA0~CA7 27~32

17, 16, 15 RAS, CAS, WE Row Address Strobe, RAS, CAS and WE define the operation.

14, 36 DOML, DOMU Data Input/Output Mask DOM control output buffer in read mode and mask input data in write mode.

2, 3, 5, I/O0~15 Data Input/Output Multiplexed data input/output pin 6, 8, 9, 11, 12, 39, 40, 42, 43, 45, 46, 48, 49

1, 25, 26

4, 7, 10, VCCO/VSSO

13, 38, 41, 44, 47, 50

33, 37 NC No Connection No connection

Terminal Name Name Input Function

the rising edge of CLK.

be one of the states among power down, suspend or self refresh.

Column Address Strobe, Refer function truth table for details. Write Enable

VCC/VSS Power Supply/Ground Power supply for internal circuit and input buffer.

Data Output Power/Ground

Power supply for DO

• Block Diagram

Self Refresh Counter

Refresh

Interval Timer

Address[0:10]

CLK

CKE

BS(A11)

CS RAS CAS

DOMU

DOML

Audio/Self Refresh

Precharge

Row Active

Column Active

State Machine

Refresh Counter

Ref. Addr.[0:11]

Address Register

Burst Length

Counter

512Kx16

Bank 0

Row Decoder

Row Addr. Latch/PredecodeRow Addr. Latch/Predecode

Sense AMP & I/O gates

Column Decoder

Column Addr.

Latch & Counter

Overflow

Column Decoder

Sense AMP & I/O gates

512Kx16

Bank 1

I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 I/O9 I/O10 I/O11 I/O12

Data Input/Output Buffers

I/O13 I/O14 I/O15

Mode Register Test Mode I/O Control

11-8. IC701 TC94A03F SERVO/DATA PROCESSOR

Pin No.

Terminal Name In/Output Operation function 3/5V system Remarks

1 ASLCN Output Data slice negative pole output 3V system Analog output terminal 2 ASLCO Output Analog data slice output 3V system Analog output terminal

(Digital slice output enabled at differential input) 3 DVSS – Ground for DAC only – 4 RO Output R-ch output signal 3V system Analog output terminal 5 DVDD – Power supply for DAC only 3V system 6 DVR Output Amplifier reference signal output 3V system Analog input terminal 7 LO Output L-ch output signal 3V system Analog output terminal 8 DVSS – Ground for DAC only – 9 XVSS – Ground for oscillator only –

10 XI Input Crystal oscillation input 3V system Analog input terminal 11 XO Output Crystal oscillation output 3V system Analog output terminal 12 XVDD – Power supply for oscillator only – 13 TESM0 – Test terminal 3V system Connected to GND 14 TESM1 – Test terminal 3V system OPEN 15 TESM2 – Test terminal 3V system Connected to VDD3 16 VDD3 – 3.3V digital power – 17 VSS3 – 3.3V digital ground – 18 VPFC Output Clock PLL system phase/frequency 3V system Analog output terminal

comparative output

19 TEST0 Input Test mode terminal 3V system Connected to VDD3 20 VLPFI Input VCO system filter input for clock PLL 3V system Analog input terminal 21 VLPFO Output VCO system filter output for clock PLL 3V system Analog output terminal 22 VSS3 – 3.3V digital ground – 23 MON0 24 MON1 25 MON2 26 MON3 27 MON4 28 MON5 29 MON6 30 MON7 31 MON8 32 MON9 33 VDD3 – 3.3V digital power – 34 NC 35 NC 36 TEST1 Input Test mode terminal 3V system Connected to VDD3 37 FLGA In/Output General-purpose I/O or flag monitor 5V system 38 FLGB In/Output General-purpose I/O or flag monitor 5V system 39 VSS3 – 3.3V digital ground – 40 /RST Input Reset terminal 5V system Pull-up resistor built in 41 /MA Input Microcomputer address enable signal 5V system Fail-safe terminal 42 /MRD Input Microcomputer data read signal 5V system Fail-safe terminal 43 /MWR Input Microcomputer data write signal 5V system Fail-safe terminal 44 /MCE Input Microcomputer chip enable signal 5V system Fail-safe terminal 45 /MINT Output Microcomputer interrupt signal 5V system Open drain terminal 46 MD0 47 MD1 48 MD2 49 MD3 50 MD4 51 MD5 52 MD6 53 MD7 54 VDD5 – 5V power supply –

Output Test monitor 3V system

––

In/Output Microcomputer data buss 5V system

DV-NC55U/C/M

Pin No.

Terminal Name In/Output Operation function 3/5V system Remarks

55 NC 56 NC 57 SMCK Output 22M system clock output 5V system 58 VMCK Output Data output system (signal processing 5V system

59 VDD3 – 3.3V digital power supply – 60 PD0 Output DVD/CD data output 5V system 61 VSS5 – 5V ground supply – 62 PD1 63 PD2 64 PD3 65 PD4 66 VSS3 – 3.3V digital ground – 67 PD5 68 PD6 69 PD7 70 PD8 71 /PSYC Output DVD data sector sync signal 5V system 72 /PDRQ Output DVD data transfer block 5V system 73 PDCK Output DVD data transfer block 5V system 74 VDD5 – 5V power supply – 75 TESM3 – Test terminal 5V system Connected to VSS5 76 DIGI Input 1 bit DAC digital IN input 5V system 77 TESM4 – Test terminal 5V system Connected to VDD5 78 VDD3 – 3.3V digital power supply – 79 BA0 80 BA1 81 BA2 82 BA3 83 VSS5 – 5V ground supply – 84 BA4 85 BA5 86 BA6 Output External RAM address output 5V system 87 BA7 88 BA8 89 VDD3 – 3.3V digital power supply – 90 /BOE Output External RAM/OE signal 5V system 91 /BRAS Output External RAM/RAS signal 5V system 92 /BCAS Output External RAM/UCAS signal 5V system 93 /BCASL Output External LCAS/WE signal 5V system 94 /BWE Output External RAM WE signal 5V system 95 VDD5 – 5V power supply – 96 BD0 97 BD1 98 BD2

99 BD3 100 BD4 In/Output External RAM data I/O 5V system 101 BD5 102 BD6 103 BD7 104 BD8 105 VSS3 – 3.3V digital ground – 106 BD9 107 BD10 108 BD11 109 BD12 110 VSS5 – 5V ground supply –

––

system) clock output

Output DVD/CD data output 5V system

Output External RAM address output 5V system

In/Output External RAM data I/O 5V system

DV-NC55U/C/M

Pin No.

Terminal Name In/Output Operation function 3/5V system Remarks 111 BD13 112 BD14 In/Output External RAM data I/O 5V system 113 BD15 114 NC 115 NC 116 VDD3 – 3.3V digital power supply – 117 PLCK In/Output PLL system clock I/O 3V system 118 TESM5 – Test terminal 3V system Connected to GND 119 TESM6 – Test terminal 3V system Connected to GND 120 TESM7 – Test terminal 3V system OPEN 121 TESM8 – Test terminal 3V system OPEN 122 VSS3 – 3.3V digital ground – 123 CFC1 Output VCO frequency control signal 3V system Analog output terminal 124 CFC2 Output VCO frequency control signal 3V system Analog output terminal 125 PPW Output

126 PESV Input Phase comparator offset adjustment signal 3V system Analog input terminal

127 PVSS – Ground for 3.3V PLL system only – 128 PESP Output

129 PDOP1 Output DVD/CD phase control signal 3V system Analog output terminal

130 PDON1 Output DVD/CD phase control signal 3V system Analog output terminal

131 PDOP2 Output DVD/CD phase control signal 3V system Analog output terminal

132 PDON2 Output DVD/CD phase control signal 3V system Analog output terminal

133 LPFN Input Data PLL low-pass filter inversion input 3V system Analog input terminal 134 LPFO Output Data PLL low-pass filter output 3V system Analog output terminal 135 PVREF –

136 VCOREF Input VCO reference 3V system Analog input terminal 137 VCOF Input VCO self-adjusting filter output 3V system Analog input terminal 138 PVDD – Power supply for 3.3V PLL system only – 139 RFOn In/Output Data slice 6-bit DAC output 3V system Analog output terminal

140 TESM9 – Test terminal 3V system OPEN 141 TEST2 Input Test mode terminal 3V system Connected to VDD3 142 RFCD Input CD RF signal input 3V system Analog input terminal

143 RFDVD Input DVD RF signal input 3V system Analog input terminal

144 AVDD – Power supply for 3.3V analog system only – 145 RFCT Input RFRP center voltage output 3V system OPEN

146 RFZI Input RFRP zero cross signal input 3V system Analog input terminal 147 TEZI Input Tracking error signal input 3V system Analog input terminal

148 AWIN Input Active wide PLL control signal input 3V system Analog input terminal 149 AVSS – Ground for 3.3V analog system only – 150 FEI Input Focus error signal input 3V system Analog input terminal 151 TEI Input Tracking error signal input 3V system Analog input terminal 152 LVL Input RF level or sub beam signal add input 3V system Analog input terminal 153 RFRP Input RFRP signal input 3V system Analog input terminal 154 AVSS – Ground for 3.3V analog system only – 155 TESM10 – Test terminal 3V system Connected to VREF

––

Phase comparator offset adjustment voltage output

input

Phase comparator offset adjustment signal output

(positive polarity)

(negative polarity)

(positive polarity)

(negative polarity)

Reference power supply for data PLL system only

(RFOn input enabled at differential input)

(RFOp input enabled at differential input)

(zero cross import)

3V system Analog output terminal

3V system

DV-NC55U/C/M

Pin No.

Terminal Name In/Output Operation function 3/5V system Remarks 156 EXTAD Input General-purpose external ADC input 3V system Analog input terminal 157 VREF – Reference power supply for analog system 3V system

only: 1.65V 158 FOO Output Focus EQ output 3V system Analog output terminal 159 TRO Output Tracking EQ output 3V system Analog output terminal 160 AVDD – Power supply for 3.3V analog system only – 161 AWCTL Output Active wide PLL control output 3V system Analog output terminal 162 FMO Output Feed EQ output 3V system Analog output terminal 163 DMO Output Disc EQ output 3V system Analog output terminal 164 TEBC Output Tracking balance control signal 3V system Analog output terminal 165 FEBC Output Focus balance control signal 3V system Analog output terminal 166 DPDC Output

DPD error signal/pit depth adjustment signal

3V system Analog output terminal 167 EQBC Output RF wide boost adjustment signal 3V system Analog output terminal 168 ANMON Output General-purpose PWM output 3V system Analog output terminal 169 /DFCT Output Black dot detection signal 3V system 170 VRCK Output RF EQ property control clock 3V system 171 VSS3 – 3.3V digital ground – 172 SCD Output Head amplifier serial data 173 SCL Output Head amplifier serial data latch pulse 3V system 174 SCB Output Head amplifier serial data clock 3V system 175 FGIN Input Disc FG signal input 3V system Feedback resistor

(with self-bias circuit) Analog input terminal

176 ASLCP Output Data slice positive pole output 3V system Analog output terminal

Note) Terminals with "/" at the beginning of their names are active "L" ones.

• Block Diagram

to Driver, RFamp

DAC

Servo

Control

Micom BUS

Syndrome

operation

Servo signal from RFamp

RF signal from RFamp

Data

Slicer

DAC I/F

DEQADC

Digital Servo

Slice level Gen.

Digital

ECC

1bit DAC

for

CD-DA

Analog

out

Clock

PLL

Micom

I/F

Output

I/F

to Micom

to DECORDER

PLL

to RFamp

SYNC Det.

Demodulation

DRAM

I/F

to DRAM

11-9. IC702 IX3420CE 4M EDO DRAM

Terminal Terminal name Function

16-19, 22-26 A0-A8 Address inputs.

14 RAS Row address strobe. 28 UCAS Column address strobe/upper byte control. 29 LCAS Column address strobe/lower byte control. 13 WE Write enable. 27 OE Output enable.

2-5, 7-10 DQ

31-34, 36-39

1, 6, 20 VCC +3.3V power supply.

21, 35, 40 VSS 0V ground.

11-12, 15, 30 NC No connection.

• Block Diagram

UCAS

LCAS

A0 A1

A7 A8

1-DQ16 Data inputs/outputs.

RAS

RAS clock

generator

Refresh

counter

Address buffers

and predecoders

CAS clock

generator

X0-X

0-Y8

decoders

WE clock generator

Data I/O Bus

Column decoders

Sense amplifiers

512 16

Row

512

Memory

array

OE clock

generator

I/O

Buffer

I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 I/O9 I/O10 I/O11 I/O12 I/O13 I/O14 I/O15 I/O16

DV-NC55U/C/M

11-10. IC5001 PT6312LQ FL DRIVER

Pin No. Terminal name I/O Operation function

1-4 SW1 to SW4 I General purpose input pins

5 DOUT O Data output pin (N-Channel, Open-Drain)

6 DIN I Data input pin

7, 43 GND – Ground pin

8 CLK I Clock input pin

9 STB I Serial interface strobe pin

10-13 K1 to K4 I Key data input pins

14, 38 VDD – Logic power supply

15-20 SG1/KS1 to O High-voltage segment output pins also acts as the key source

SG6/KS6

21-25 SG7 to SG11 O High voltage segment output pin

26, 28-31 SG12/GR11 High voltage segment/grid output pins

SG13/GR10 to O

SG16/GR7

27 VEE – Pull-down level 32-37 GR6 to GR1 O High-voltage grid output pins 42-39 LED1 to LED4 O LED output pin

44 OSC I Osillator input pin

This pin outputs serial data at the falling edge of the shift clock (starting from the lower bit).

This pin inputs serial data at the rising edge of the shift clock (starting from the lower bit)

This pin reads serial data at the rising edge and outputs data at the falling edge.

The data input after the STB has fallen is processed as a command. When this pin is "HIGH", CLK is ignored.

The data inputted to these pins are latched at the end of the display cycle.

A resistor is connected to this pin to determine the oscillation frequency.

• Block Diagram

DIN

DOUT

CLK

STB

VDD

OSC

SW1

SW2

SW3

SW4

LED1

LED2

LED3

LED4

Serial

Data

Interface

OSC

General

Input

LED

Driver

Control

Display Memory

(16bits x 11 Words)

Timing Generator

Key Matrix Memory

Dimming Circuit

Segment

Driver/

Grid

Driver/

Key Scan

Output

Grid

Driver

SG1/KS1

SG2/KS2

SG3/KS3

SG4/KS4

SG5/KS5

SG6/KS6

20 21

SG7

SG8

SG9

SG10

SG11

SG12/GR11

SG13/GR10

28 29

SG14/GR9 SG15/GR8

SG16/GR7

GR1

GR2

36 35

GR3

GR4

GR5

GR6

10 11 12 13

14, 38 7, 43

VDD GND VEEK1 K2 K3 K4

11-11. IC6001 PCM1737 AUDIO DAC

Pin No. Terminal name I/O Operation function

1 LRCK I LRCK clock input (fs) 2 DATA I Audio • Data input 3 BCK I Bit clock input for data. 4 CLKO O System clock buffered output. 5 SCLK I System clock input. 6 DGND – Digital ground. 7VDD – Digital power supply +3.3V 8 TEST1 I Test pin 9 TEST2 I Test pin

(2)

(Open or ground)

(2)

(Open or ground) 10 VCCR – Rch, Analog power supply +5V 11 AGNDR – Analog ground, Rch 12 VCOMR – Rch Analog output amp. • common 13 VOUTR O Rch Analog voltage output. 14 AGND – Analog • ground 15 VCC – Analog power supply +5V 16 VOUTL O Lch Analog voltage output 17 VCOML – Lch Analog output amp • common 18 AGNDL – Analog ground, Lch 19 VCCL – Lch, Analog power supply +5V 20 NA I Not connected. 21 NA I Not connected. 22 RST I

Reset 23 ZEROL O Lch, Zero data • flug 24 ZEROR O Rch, Zero data • flug 25 MDO O Mode control, data output 26 MDI I Mode control, data input 27 MC I Mode clock 28 ML I Mode latch

(2)

(1)

(3)

(2)

DV-NC55U/C/M

Note: (1) Schmidt trigger input, 5V logic input possible. (2) Schmidt trigger input pull-down resistor. 5V logic input possible. (3) Try state output

• Block Diagram

BCK

LRCK

DATA

TEST1 TEST2

RST

ML MC

MDI

MDO

NA NA

SCLK

Sirial

I/F

Function

Control

Clock

Manager

Oversampling

Dijital Filter

Controller

System Clock

x8 (x4)

Mulcher

Function

Mulcher Level

Data-Sigma

Modulator

Zero detection

DAC

CR LPF

Output Amp

CR LPF

Output Amp

Power Supply.

OUT

COM

OUT

COM

CLKO

ZEROL

ZEROR

DGND

AGND

AGNDL

GNDR

DV-NC55U/C/M

11-12. IC7701 BA5984FP MOTOR DRIVER

Pin No. T erminal name

1 LD-FWD Loading driver FWD input terminal 15 V04(+) Driver CH4 Negative output 2 SL_IN(+) 3 SL_IN(-) 4 SLOUT 5 SP_IN(+) 6 SP_IN(-) 7 SP_OUT

CH1 Former stage amplifier nonreverse input terminal CH1 Former stage amplifier reverse input terminal CH1 Former stage amplifier output terminal CH2 Former stage amplifier nonreverse input terminal CH2 Former stage amplifier reverse input terminal

CH2 Former stage amplifier output terminal 8 VCC Power terminal 22 FO_OUT 9 LD(-) Loading driver Negative output 23 FO_IN(-)

10 LD(+) Loading driver Positive output 24 FO_IN(+) 11 SPIN(-) Driver CH2 Negative output 25 TR_OUT 12 SPIN(+) Driver CH2 Positive output 26 TR_IN(-) 13 SL(-) Driver CH1 Negative output 27 TR_IN(+) 14 SL(+) Driver CH1 Positive output 28 REV Loading driver REV input terminal

Note 1: Positive and negative output the driver have polarity with respect to input. (An example: 4 pin terminal voltage

‘HIGH’: 14 pin terminal voltage ‘HIGH’)

• Block Diagram

Operation function

Pin No. Terminal name

Operation function

16 V04(-) Driver CH4 Positive output 17 V03(+) Driver CH3 Negative output 18 V03(-) Driver CH3 Positive output 19 GND Ground terminal 20 BIAS Bias input terminal 21 MUTE Mute control terminal

CH3 Former stage amplifier output terminal CH3 Former stage amplifier reverse input terminal CH3 Former stage amplifier nonreverse input terminal CH4 Former stage amplifier output terminal CH4 Former stage amplifier reverse input terminal CH4 Former stage amplifier nonreverse input terminal

28 27 26 25 24 23 22 21 20 19 18 17 16 15

Loading Driver

REV OUTF

FWD OUTR

1 2 3 4 5 6 7 8 9 10 11 12 13 14

10K

MUTE

10K

16K

10K

16K

VCC

10K 10K 10K

10K

- +

Level

Shift

Level

Shift

- +

10K

- +

Level

Shift

Level

Shift

- +

10K

11-13. IC8201 IX1757GE INTERFACE MICOM.

• Terminal description

Pin No. Terminal Name In/Output Operation function

1 TRAY ACK(L) Input Input terminal of [TRAY ACK] from DVD microcomputer 2 DVD LED(L) Output DVD LED control terminal

It outputs [L] and is lit during DVD output.

3 DUB LED(L) Output VTR

4 STANDBY LED(L) Output Stand-by LED control terminal

5 TEST Input IC test terminal. Fixed to GND. 6 XIN Input Radiator connection terminal 7 VSS – Digital GND 8 XOUT Output Radiator connection terminal

9 VDD – Power AT_5V 10 R/C Input Remote control signal input 11 RESET Input Microcomputer reset signal input 12 NC – Unconnected 13 POWER KEY Input POWER key input: [L] input while key is ON. 14 OPEN/CLOSE KEY Input OPEN/CLOSE key input: [L] input while key is ON. 15 EA Input Terminal for IC only. Fixed to power supply. 16 POWER OFF Output VTR POWER OFF key control terminal

17 POWER ON Output VTR POWER ON key control terminal

18 TIMER MODE Input VTR TIMER mode detection terminal

19 POWER MODE Input VTR POWER mode detection terminal

20 REC MODE Input VTR REC mode detection terminal

21~31 NC – No used

32 P-CON(L) Output DVD P-CON control terminal 33 SHORT DET(L) Input Short circuit detection terminal for DVD P-CON power supply

34 NC – Unconnected 35 A_OUT_MUTE(L) Output Sound output mute control terminal for VTR/DVD common terminal 36 DVD(H) Output Output switching control terminal for VTR/DVD common terminal 37 DUB(H) Output Input switching control terminal for VTR input 1

38~40 NC – No used

41 PLAY MODE(L) Input DVD PLAY mode detection terminal

STANDBY REQUEST(L)

43 TRAY REQUEST(L) Output Control terminal for TRAY operation request to DVD microcomputer

44 STANDBY ACK(L) Input Input terminal for [STANDBY ACK] from DVD microcomputer

Output Control terminal for POWER OFF request to DVD microcomputer

← DVD LED control terminal

It outputs [L] and is lit in VTR ← DVD mode.

It outputs [L] and is lit during stand-by.

It outputs [H] when the power is OFF.

It outputs [H] when the power is ON.

When [H] is output, the VTR power ON/OFF is not controlled.

When [TIMER MODE] = [L], DVD is turned ON when the [POWER MODE] is activated and turned OFF when it is deactivated.

[VTR ← DVD] key is disabled at [H] input.

After [L] is input for 0.5 seconds, P-CON is switched to OFF.

When [TIMER MODE] = [H] and [PLAY MODE] = [L], DVD is not turned OFF even if the [POWER MODE] is deactivated.

It keeps outputting the request until [STANDBY ACK] = [L] is input.

It keeps outputting the request until [TRAY ACK] = [L] is input.

DV-NC55U/C/M

• Block Diagram

TXD

RXD,

SCK,

SI, SO

SERIAL

INTERFACE

AD0~7

P22~P20 P47~P40

Port 2 Port 4

TI0, TI1

INTREQ

STOP

UART8bit TMR

ch. 0 ch. 1

ch. 1 ch. 0

INTERRUPT

CONTROLLER

EXTERNAL BUS

TO0

TO1

16-bit

ETC0

Expansion Timer

DVO

Port 09

A8~A15

RD, WR, ALE, WAIT, CLK

Port 3Port 1

P17~P10 P37~P30 P07~P00

OSC

LOW FREQ

OSC

HIGH FREQ

XOUT

XIN

fsfc

CLK GEAR, TBT

OSC

SYSCLK

STANDBY

CONTROLLER

CPU WDT

RESET

RAM

512B

ROM

16KB

- M E M O -

DV-NC55U/C/M

12. BLOCK DIAGRAMS

12-1. MAIN BLOCK DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

1234567891011 12 13 14 15 16 17 18 19 20

76~77

12-2. VTR SIGNAL FLOW BLOCK DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

1234567891011 12 13 14 15 16 17 18 19 20

78~79

12-3. VTR SERVO BLOCK DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

1234567891011 12 13 14 15 16 17 18 19 20

80~81

12-4. POWER BLOCK DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

1234567891011 12 13 14 15 16 17 18 19 20

82~83

13. SCHEMATIC DIAGRAMS 13-1. DVD MAIN (1) CIRCUIT SCHEMATIC DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

1234567891011 12 13 14 15 16 17 18 19 20

84~85

13-2. DVD MAIN (2) CIRCUIT SCHEMATIC DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

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86~87

DV-NC55U/C/M

13-3. VTR DISPLAY CIRCUIT SCHEMATIC DIAGRAM

12345678910

13-4. DVD DISPLAY CIRCUIT SCHEMATIC DIAGRAM

DV-NC55U/C/M

10 11 12 13 14 15 16 17 18 19

12345678910

13-5. AUDIO/VIDEO CIRCUIT SCHEMATIC DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

1234567891011 12 13 14 15 16 17 18 19 20

90~91

DV-NC55U/C/MDV-NC55U/C/M

13-6. POWER CIRCUIT SCHEMATIC DIAGRAM

å AND SHADED COMPONENTS=SAFETY RELATED PARTS

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92~93

13-7. INTERFACE CIRCUIT SCHEMATIC DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

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94~95

13-8. VTR MAIN (1) CIRCUIT SCHEMATIC DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

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96~97

DV-NC55U/C/MDV-NC55U/C/M

13-9. VTR MAIN (2) CIRCUIT SCHEMATIC DIAGRAM

å AND SHADED COMPONENTS=SAFETY RELATED PARTS

å

1234567891011 12 13 14 15 16 17 18 19 20

98~99

13-10. VTR MAIN (3) CIRCUIT SCHEMATIC DIAGRAM

DV-NC55U/C/MDV-NC55U/C/M

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100~101

DV-NC55U/C/M

14. PRINTED WIRING BOARD ASSEMBLIES

DVD MAIN PWB

Component Side SIDE A

R570

TP811

C209

FB602

R507 C510 C511 C508

TP821

TP819

TP817

TP815 TP814

TP809

TP807

TP805

TP840

TP802

C207 C206

R529

TP812

R802 R801 R826 R825

L501

FB807

TP808

R816 R817

R815

TP810

R806 R805 R804 R803

C502

R505

R510

TP813

R513

R508

R506

C213

C212

C214

R503

R509

R501

R516 R514

C501 R511

R519

R517

R504

R7704

R518

R502

TP318

TP831

C210

C211

TP832 TP833 TP834 TP835

CN201

TP836 TP837 TP838 TP839

C208

R691 TP602 TP603

CN601

TP601

FB607

C509

TP824

TP823

TP822

TP820

TP818

TP816

CN801

TP806

TP804

TP803 TP801

FD2

CN702

TP7705TP7704TP7703

TP7702TP7701 TP7711TP7710TP7709

R7701

R7711

R7709

R7740 R7739

C7703

R7708 R7707

R7710

R7712

IC702

R528

R524

FL501

R520

R522

C506

R521

C507

IC504

R550

IC501

R7713

R533

R7717

R525

R7714

R539 R538 R542

C7702

R531

R556

IC7701

C605

R551 R552

C606

C607

C608

R535

R541

C609

R7721

R7722

R537

C503 R545

C7707

R534 R540 R543 R544

TP501

CN701

C7704

TP7708TP7707TP7706

R7725

R7729

R7736

R7724

R7726

C7705

C752

C505

TP502

C504

R558

Q502

C526

R557

R7730

TP604

R7732

R567

TP333

Q503

TP605

TP606

R780

TP607

C780

C602

TP608

Q308

Q309

C338

C327 TP331

C326 C325

C324

C330

C328

C337

TP332

C323

R621

C635

C320

L301

IC601

C329

R343

R620

C634

C318

C601

R619

C321

C316

C317

R618

C314

C633

L302

R617

C313

IC301

R317

R615

R616

C322

R344

TP503

C632

C604

C603

C310

C309

L602

C315

R341 R342

FD4

C308

TP320

TP322

C302

TP323

R311

TP321

R336 R335

R327

TP319

R334

C303 R328

TP317

R333

TP316

R340

TP315

TP314

R332

TP313

R331

TP312

TP311

R330

TP310

R329

TP309

TP308

R339

R337

TP307

R338

TP306

TP305

R316

TP304

TP303

C301

TP302

TP301

R325 R326

C631

C630

C627

FB605

R612

R613

TP841

FB604 R602 R604 R605

C625 R603

C623

C622

C621

CN301

R614

C629

X601

C626

CN803

CN802

C517

R555

C610

C611

C612

C613

R601

C614

C615

C616

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102

DV-NC55U/C/M

Wiring Side SIDE A

10 11 12 13 14 15 16 17 18 19

12345678910

103

DV-NC55U/C/M

Component Side SIDE B

Q304

C307

R314

Q302

R315

C305

R310

Q301

D301

R303

C304

R304 C306

C319

R319

Q303

R320

R318

C312

R515

C624

C628

L601

C205

C202

R224

R827

Q201

R607

TP827

R820

R824

TP826

R819

TP825

R818

R823

TP830

TP829

TP828

FD3

C204

C203

R225

R822 R226

R821 R227 C201

Q202

Q203

Q205

R609 R611

R606 R608 R610

C617

C618

FB601

C643

D501

C619C640

R322

R323 R321

FB301

Q307

IC503

CN302

TP712

TP701

R719

TP702

C519

R751

C749

IC603

IC602

TP703

R760 C748

IC507

FL701

TP704

R720

TP705

TP708

C332

C333

C311

C512

C620 C646

R755

R758

R718

C742

TP706 TP709

C751

C732 C733

R757R754

R716

TP707

TP710 TP711

R725

R759C746C744

C727

TP714

R736

C331

C717

C726

R735Q702

C641

FB603

C729 R728

C725

R734

C644

C724R712

R564

R727

R733

TP506 TP507

C723C731

R563

R714

R732

TP505

C722R715

R731

C758

TP504

TP508

C524

C515

C712

C721R717

C759

C520

R536

R523

C734

R730

TP713

R565

Q501

C525

TP509 TP510 TP511

C728 C706

R729

C523

TP513

IC7702

R711

C708

Q701

C705 R708

IC701

R710

R7734

R709

C7706

R767

C716 C709

C781

C713

L702

R726

C730

IC508

C715

R769

IC502

C720

C735

R532

C707

C710

C719

R724

R722

C711

C756C757

C753

R713

R723

R721

C718

R562

L701

C750

C528 C521

R738 R740 R742 R744 R746

C741

R750 R753

C747

R569

R561C527

R707

R747

R761 R762 R763 R764 R765

R768

R568

R737 R739 R741 R743 R745

R748

R749 R752

R560

C529 R566

R559

R530

C714

C743 C745

C516

C737 C738

C739

C740

C665

R756

C662

C703

R705 C704 R706

R704

FB817

FB815

FB814 FB813 FB812 FB811

R814 R813 R812 FB810 FB809 FB808

FB806

R703

C664

C663

C522

FD1

R702

FB816

CN703

IC604

R701

IC705

C661

C702

C701

Z1Z2

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104

DV-NC55U/C/M

Wiring Side SIDE B

10 11 12 13 14 15 16 17 18 19

12345678910

105

DV-NC55U/C/M

VTR DISPLAY PWB

Component Side SIDE A

Wiring Side SIDE A

Component Side SIDE B

Wiring Side SIDE B

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106

DVD DISPLAY PWB

DV-NC55U/C/M

Component Side SIDE A

Wiring Side SIDE A

Component Side SIDE B

Wiring Side SIDE B

10 11 12 13 14 15 16 17 18 19

12345678910

107

DV-NC55U/C/M

AUDIO/VIDEO PWB

Component Side SIDE A

Wiring Side SIDE A

12345678910

108

DV-NC55U/C/M

Component Side SIDE B

Wiring Side SIDE B

10 11 12 13 14 15 16 17 18 19

12345678910

109

DV-NC55U/C/M

POWER PWB

Component Side SIDE A

Wiring Side SIDE A

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110

DV-NC55U/C/M

Component Side SIDE B

Wiring Side SIDE B

10 11 12 13 14 15 16 17 18 19

12345678910

111

DV-NC55U/C/M

INTERFACE PWB

Component Side SIDE A

Wiring Side SIDE A

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112

Sharp DV-NC55M, DV-NC55U, DV-NC55C User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual