JVC HR-XV31EK, HR-XV31EX, HR-XV32EK, HR-XV3EK, HR-XV3EX Service Manual

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SERVICE MANUAL

DVD PLAYER & VIDEO CASSETTE RECORDER

YD002200311

HR-XV3EK, HR-XV31EK,

HR-XV32EK, HR-XV3EX,

HR-XV31EX, HR-XVS30EK,

HR-XVS30EX

(EK models)

(EX models)

(S-VHS models)

HR-XV3EK, HR-XV31EK, HR-XV32EK, HR-XV3EX, HR-XV31EX, HR-XVS30EK, HR-XVS30EX [D3PV1,D3PS1]

For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700 (MECHANISM ASSEMBLY).

(VHS models)

(S-VHS models)

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

No.YD002

2003/11

SPECIFICATION

HR-XV3EK, HR-XV31EK,

HR-XV32EK

GENERAL

Power requirement AC 220V - 240V, 50 Hz/60 Hz

Power consumption

Power on 26 W 30 W Power off 6.0 W

Temperature

Operating 5°C to 40°C

Storage -20°C to 60°C

Operating position Horizontal only

Dimensions (W×H×D) 435 mm × 93 mm × 272 mm

Weight 4.5 Kg 4.4 Kg 4.5 Kg 4.4 Kg Format VHS PAL standard S-VHS/VHS PAL standard

Maximum recording time

(SP) 240 min. with E-240 video cassette

(LP) 480 min. with E-240 video cassette

(EP) - 720 min. with E-240 video cassette

VIDEO/AUDIO (VCR deck)

Signal system PAL-type colour signal and CCIR monochrome signal, 625 lines/50 fields

Recording system DA4 (Double Azimuth) head helical scan system Signal-to-noise ratio: 45 dB Horizontal resolution 250 lines SP/LP: 250 lines (VHS)/400 lines (S-VHS)

Frequency range 70 Hz to 10,000 Hz (Normal audio) 20 Hz to 20,000 Hz (Hi-Fi audio)

Input/Output 21-pin SCART connectors: IN/OUT × 1, IN/DECODER × 1

RCA connectors: VIDEO IN × 1, AUDIO IN × 1, AUDIO OUT × 1

VIDEO/AUDIO (DVD deck)

Signal system PAL

Applicable disc DVD (12 cm, 8 cm), CD (12 cm, 8 cm) Audio characteristics DVD:4 Hz - 22 KHz Frequency response CD:4 Hz - 20 KHz

S/N Ratio 90 dB

Wow and flutter Below Measurable Level

Dynamic range 90 dB

Output

Component-Y - (RCA) 1.0 Vp-p/75 Ω

Component-PB/PR - (RCA) 0.7 Vp-p/75 Ω

Audio (RCA) 2 Vrms, 1 KΩ

Digital Audio -21 dBm to -15 dBm(peak)

TUNER/TIMER(VCR deck)

TV channel storage

capacity Tuning system Frequency synthesized tuner Channel coverage VHF : 44.5 MHz - 143 MHz/

143MHz - 470 MHz UHF : 470 MHz - 862 MHz

Aerial output UHF channels 22 - 69 (Adjustable) Memory backup time Approx. 10 min.

ACCESSORIES

Provided accessories RF cable, Infrared remote control unit, "R6" battery × 2

HR-XV3EX, HR-XV31EX HR-XVS30EK HR-XVS30EX

EP: 220 lines (VHS)/350 lines (S-VHS)

21-pin SCART connectors: IN/OUT × 1, IN/DECODER × 1

99 positions (+AUX position)

VHF : 47 MHz - 89 MHz/ 104 MHz - 300MHz/302 MHz 470 MHz UHF : 470 MHz - 862 MHz

RCA connectors: VIDEO IN × 1, AUDIO IN × 1, AUDIO OUT × 1

VHF : 44.5 MHz - 143 MHz/ 143 MHz - 470 MHz UHF : 470 MHz - 862 MHz

S-Video connector: IN × 1

VHF : 47 MHz - 89 MHz/ 104 MHz - 300 MHz/302 MHz 470 MHz UHF : 470 MHz - 862 MHz

Specifications shown are for SP mode unless otherwise specified. E.& O.E. Design and specifications subject to change without notice. Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories. "DTS" and "DTS Digital Out" are trademarks of Digital Theater Systems, Inc.

1-2 (No.YD002)

SECTION 1

PRECAUTION

1.1 SAFTY PRECAUTIONS

Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold.However,in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

1.1.1 Precautions during Servicing

(1) Locations requiring special caution are denoted by labels

and inscriptions on the cabinet, chassis and certain parts of the product.When performing service, be sure to read and comply with these and other cautionary notices appearing in the operation and service manuals.

(2) Parts identified by the symbol and shaded ( ) parts

are critical for safety. Replace only with specified part numbers.

NOTE :

Parts in this category also include those specified to comply with X-ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spurious radiation emission.

(3) Fuse replacement caution notice.

Caution for continued protection against fire hazard. Replace only with same type and rated fuse(s) as specified.

(4) Use specified internal wiring. Note especially:

• Wires covered with PVC tubing

• Double insulated wires

• High voltage leads

(5) Use specified insulating materials for hazardous live parts.

Note especially:

• Insulation Tape

• PVC tubing

•Spacers

• Insulation sheets for transistors

•Barrier

(6) When replacing AC primary side components (transformers,

power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering.

Consequently, when servicing these products, replace the cathode ray tubes and other parts with only the specified parts. Under no circumstances attempt to modify these circuits.Unauthorized modification can increase the high voltage value and cause X-ray emission from the cathode ray tube.

(12) Crimp type wire connectorIn such cases as when replacing

the power transformer in sets where the connections between the power cord and power trans former primary lead wires are performed using crimp type connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the following steps.

• Connector part number :E03830-001

• Required tool : Connector crimping tool of the proper type which will not damage insulated parts.

• Replacement procedure

a) Remove the old connector by cutting the wires at a

point close to the connector.Important : Do not reuse a connector (discard it).

cut close to connector

Fig.1-1-3

b) Strip about 15 mm of the insulation from the ends

of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.

15 mm

Fig.1-1-4

c) Align the lengths of the wires to be connected. In-

sert the wires fully into the connector.

Metal sleeve

Fig.1-1-1

(7) Observe that wires do not contact heat producing parts

(heatsinks, oxide metal film resistors, fusible resistors, etc.)

(8) Check that replaced wires do not contact sharp edged or

pointed parts.

(9) When a power cord has been replaced, check that 10-15

kg of force in any direction will not loosen it.

Power cord

Fig.1-1-2 (10) Also check areas surrounding repaired locations. (11) Products using cathode ray tubes (CRTs)In regard to such

products, the cathode ray tubes themselves, the high voltage circuits, and related circuits are specified for compliance with recognized codes pertaining to X-ray emission.

Connector

Fig.1-1-5

d) As shown in Fig.1-1-6, use the crimping tool to crimp

the metal sleeve at the center position. Be sure to crimp fully to the complete closure of the tool.

1.2 5

5.5

Crimping tool

Fig.1-1-6

e) Check the four points noted in Fig.1-1-7.

Not easily pulled free

Wire insulation recessed

more than 4 mm

Crimped at approx. cente

of metal sleev

Conductors extended

Fig.1-1-7

(No.YD002)1-3

1.1.2 Safety Check after Servicing

Examine the area surrounding the repaired location for d amage or deterioration. Observe that screws, parts and wires have been returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.

(1) Insulation resistance test

Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.).See table 1 below.

(2) Dielectric strength test

Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See Fig.1-1-11 below.

(3) Clearance distance

When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metallic parts. See Fig.1-1-11 below.

Chassis

Power cord primary wire

Fig.1-1-8

(4) Leakage current test

Confirm specified or lower leakage current between earth ground/power cord plug prongs and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). Measuring Method : (Power ON)Insert load Z between earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See Fig.1-1-9 and following Fig.1-1-12.

Externally exposed accessible part

Z V

Fig.1-1-9

(5) Grounding (Class 1 model only)

Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in, Video out, Audio in, Audio out or Fixing screw etc.).Measuring Method: Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See Fig.1-1-10 and grounding specifications.

AC inlet

Earth pin

Exposed accessible part

MIlli ohm meter

Grounding Specifications

Region USA & Canada Europe & Australia

Grounding Impedance (Z

Z 0.1 ohm Z 0.5 ohm

)

Fig.1-1-10

AC Line Voltage

100 V 100 to 240 V 110 to 130 V

110 to 130 V 200 to 240 V

Region

Japan USA & Canada

Europe & Australia

Insulation Resistance (R

R 1 M /500 V DC

1 M R 12 M /500 V DC

R 10 M /500 V DC

)

Dielectric Strength

AC 1 kV 1 minute AC 1.5 kV 1 minute AC 1 kV 1 minute

AC 3 kV 1 minute AC 1.5 kV 1 minute

(

Class

(

Class

Clearance Distance (d), (d'

d, d' 3 mm d, d' 4 mm d, d' 3.2 mm

d 4 mm

)

d' 8 mm (Power cord d' 6 mm (Primary wire

)

Fig.1-1-11

AC Line Voltage

100 V

110 to 130 V

110 to 130 V 220 to 240 V

Region

Japan

USA & Canada

Europe & Australia

Load Z

0.15

1.5

Leakage Current (i)

i 1 mA rms

i 0.5 mA rms i 0.7 mA peak

i 2 mA dc i 0.7 mA peak

i 2 mA dc

a, b, c

Exposed accessible parts

Antenna earth terminals

Other terminals

Fig.1-1-12

NOTE :

These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

)

1-4 (No.YD002)

1.2 Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.2.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed.

(1) Ground the workbench

Ground the workbench by laying conductive material (such as a conducti ve sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

(2) Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(3) Handling the optical pickup

• In order to maintain quality during transport and before insta llation, both sides of the lase r diode on the replacement o ptical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)

• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.

(No.YD002)1-5

1.3 Important for laser products

(1) CLASS 1 LASER PRODUCT (2) DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

(3) CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

(4) CAUTION : The compact disc player uses invisible laser

radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.

VARNING

Osynlig laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen.

VARO

Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.

ADVARSEL

Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsasttelse for stråling.

ADVARSEL

Usynlig laserstråling ved åpning, når sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABEL and PRINT

WARNING LABEL

(5) CAUTION : If safety switches malfunction, the laser is able

to function.

(6) CAUTION : Use of controls, adjustments or performance of

procedures other than those specified herein may result in hazardous radiation exposure.

CAUTION Please use enough caution not to see the beam directly or touch it in case of anadjustment or operation check.

CN7103

CN501

A/C HEAD

CN2001

CN7101

CN6201

CN5001

1-6 (No.YD002)

1.4 Precautions for Service

1.4.1 Handling of Traverse Unit and Laser Pickup

(1) Do not touch any peripheral element of the pickup or the actuator. (2) The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock. (3) Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.) (4) To replace the traverse unit, pull out the metal short pin for protection from charging. (5) When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center of

the flexible wire to open the circuit.

(6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block.

Do not change the setting of these half-fixed resistors for laser power adjustment.

1.4.2 Destruction of Traverse Unit and Laser Pickup by Static Electricity

Laser diodes are easily destroyed by static electricity charged on clothingor the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostatic protection:

(1) Wear an antistatic wrist wrap. (2) With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the

sheet or the plate. (3) It solders to two short circuit sections on the substrate of a pick-up. (4) After removing the flexible wire from the connector (CN101 (5) Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup.

After completing the repair, remove the solder to open the circuit.

), short-circuit the flexible wire by the metal clip.

Pick-up

Short circuit

* Please refer to the SECTION3 DISASSEMBLY method for details.

CN101

DVD SERVO CONTROL BOARD

(No.YD002)1-7

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 Different table of feature

The following table indicates main different points between models HR-XV3EK, HR-XV31EK,HR-XV32EK, HR-XV3EX, HR-XV31EX, HR-XVS30EK, and HR-XVS30EX.

HR-XV3EK HR-XV31EK HR-XV32EK HR-XV3EX HR-XV31EX HR-XVS30EK HR-XVS30EX

POWER PLUG 3PIN BODY COLOR PURE SILVER FRONT PANEL

COVER REMOCON

COLOUR VHS PAL/NTSC PB

S-VHS NOT USED S-VHS ET NOT USED ←←←←USED ← SQPB USED ←←←←NOT USED ← RECORDING &

PLAYBACK SPEED FRONT INPUT VIDEO,AUDIO

REAR L-1 INPUT SCART IN /

COMPORNENT VIDEO OUT

BROADCASTING STANDARD

STEREO DECODER

RF OUT CH/RF OUT SYSTEM[INITIAL]

VCR PLUS+ VIDEOPLUS+ ←←SHOWVIEW ← VIDEOPLUS+ SHOWVIEW VPS/PDC NOT USED OSD LANGUAGES VCR:ENGLISH

WMA(CD-R/RW) NOT USED ILLUMINATION

COLOR

USED NOT USED USED ← NOT USED USED ←

GRAY ← BLACK GRAY ←←←

on PAL TV with HiFi

SP/LP ←←←←SP/LP/EP ←

(L/R)

OUT(RGB) NOT USED ←←←←DVD:Y/Pb/Pr ←

I ←←B/G,D/K ← I B/G,D/K

NICAM ←←NICAM/A2 ← NICAM NICAM/A2

22-69CH,OFF [AUTO]/I

DVD:ENGLISH/ FRENCH/ GERMANY

BLUE NOT USED BLUE ← NOT USED BLUE ←

←←CEE ← 3PIN CEE ← BLACK PURE SILVER ←←←

←←PAL/MESECAM

(MANUAL) / NTSC PB on PAL TV with HiFi

← PAL/NTSC PB

on PAL TV with HiFi

PAL/MESECAM (MANUAL) / NTSC PB on PAL TV with HiFi

←←←←USED ←

←←←←S-VIDEO,

VIDEO,AUDIO (L/R)

←←←←SCART IN / OUT

(Y/C,RGB)

←←22-69CH,OFF

[AUTO]/G,K

← 22-69CH,OFF

[AUTO]/I

←

22-69CH,OFF [AUTO]/G,K

←←USED ← NOT USED USED ←←VCR:13

LANGUAGES DVD:ENGLISH/ FRENCH/ GERMANY

← VCR:ENGLISH

DVD:ENGLISH/ FRENCH/ GERMANY

VCR:13 LANGUAGES DVD:ENGLISH/ FRENCH/ GERMANY

←←←←USED ←

NOTE :

Mark ← is same as left.

1-8 (No.YD002)

2.2 Service position

This unit has been designed so that the Mechanism an d Main board assemblies can be removed together from the bottom chassis. Before diagnosing or servicing the circuit boards, take out the major parts from the bottom chassis.

2.2.1 How to set the "Service position"

(1) Refer to the disassembly procedure and perform the disas-

sembly of the major parts before removing the Mechanism

assembly. (2) Remove the screws that fix the Mechanism, Regulator

board assembly to the bottom chassis. If any other screws

are used to fix the boards, remove them also. (3) Remove the combined Mechanism,Regulator borad and

Main board assemblies. (4) If any other major parts are used, remove them also. (5) Connect the wires and connectors of the major parts that

have been removed in steps (1) to (4). (Refer to Fig. 2-2a.) (6) Place the combined Mechanism, Main board and other

board assemblies upside down. (7) Insert the power cord plug into the power outlet and then

proceed with the diagnostics and servicing of the board as-

sembly.

Notes:

• Before inserting the power cord plug into the power out-

let, make sure that none of the electrical parts are able to short-circuit between the workbench and the board assembly.

• For the disassembly procedure of the major par ts and

details of the precautions to be taken, see "Removing the major parts".

• If there are wire connections from the Main board an d

Mechanism assemblies to the other major parts, be sure to remove them (including wires connected to the major parts) first before performing step (2).

• When carrying out diagnosis and repair of the Main

board assembly in the "Service position", be sure to ground both the Main board and Mechanism assemblies. If they are improperly grounded, there may be noise on the playback picture or FDP counter display may move even when the mechanism is kept in an inoperative status.

• In order to diagnose the playback or recording of the

cassette tape, set the Mechanism assembly to the required mode before placing it upside do wn. If the mechanism mode is changed (including ejection) while it is in an upside down position the tape inside may be damaged.

• For some models, the mechanism and board assem-

blies are attached by connectors only. When carrying out a diagnosis or repair of the boards in the "Service position", make sure that the connectors are not disconnected.

Regulator board assembly

TP111 D.FF

TP4001 CTL.P

TP106 PB FM TP2253 A.PB FM

TP2254 A.REC FM

Display board assembly

Main board assembly

Jack board assembly

Fig.2-2a

2.3 Jig RCU mode

This unit uses the following two modes for receiving remote control codes.

(1) User RCU mode:Ordinary mode for use by the user.

(2) Jig RCU mode: Mode for use in production and servicing. When using the Jig RCU, it is required to set th e VCR to the Jig RCU mode (the mode in which codes from the Jig RCU can be received). As both of the above two modes are stored in the EEPROM, it is required to set the VCR back to the User RCU mode each time that an adjustment is made or to check that the necessary operations have been completed.These modes can be set by the operations described below.

Note:

• Confirm the RCU mode when exchanged parts. Since

some SERVICE PARTS sets the VCR to the Jig RCU mode as initial setting. Therefore please set the VCR to the user RCU mode after replacing the EEPROM.

User RCU mode

Jig RCU mode

(ޓnot displayed)

Fig.2-3a User/Jig RCU mode

2.3.1 Setting the Jig RCU mode

(1) Turn on the power.

(2) Press the following remocon keys continuously within 2

seconds " SET UP MENU " → " 2 " → " 8 " → " OK ". When the VCR is set to the Jig RCU mode, the symbols ( " : " ) in the time display of the FDP are turned off. (Refer to Fig.2-3a)

(No.YD002)1-9

2.3.2 Setting the User RCU mode

(1) Turn off the power. (2) Press the "REC" and "PAUSE" buttons of the VCR simul-

taneously. Alternatively, transmit the code "80" from the Jig RCU.

2.4 Mechanism service mode

This model has a unique function to enter the mechanism into every operation mode without loading of any cassette tape. This function is called the "Mechanism service mode".

2.4.1 How to set the "Mechanism service mode"

(1) Set the VCR to the Jig RCU mode (the mode in which

codes from the Jig RCU can be received) (2) Transmit the code "E5" from the Jig RCU. (3) Release the lug of the Cassette holder and then slid e the

Cassette holder toward the direction where the Cassette

holder is loaded by manually. (4) The cassette holder lowers and, when the loading has

completed, the mechanism enters the desired mode.

When the VCR is set to the Mechanism service mode, the

symbols ("Timer") in the FDP (LED) are blinked.

2.4.2 How to exit from the "Mechanism service mode"

(1) Unplug the power cord plug from the power outlet.

2.5 Maintenance and inspection

2.5.1 Cleaning

Regular cleaning of the transport system parts is desirable but practically impossible. So make it a rule to carry out cleaning of the tape transport system whenever the machine is serviced. When the video head, tape guide and/or brush get soiled, the playback picture may appear inferior or at worst disappear, resulting in possible tape damage.

Note:

• Absolutely avoid sweeping the upper drum vertically as

this will cause damage to the video head.

(1) When cleaning the upper drum (especially the video head),

soak a piece of closely woven cloth with alcohol and while

holding the cloth onto the upper drum by the fingers, turn

the upper drum counterclockwise. (2) To clean the parts of the tape transport system other than

the upper drum, use a piece of closely woven cloth or a cot-

ton swab soaked with alcohol. (3) After cleaning, make sure that the cleaned parts are com-

pletely dry before using the cassette tape.

2.5.2 Lubrication

With no need for periodical lubrication, you have only to lubricate new parts after replacement. If any oil or grease on contact parts is soiled, wipe it off and newly lubricate the parts.

Note:

• See the "mechanism assembly" diagram of the "parts

list" for the lubricating or greasing spots, and for the types of oil or grease to be used.

2.5.3 Suggested servicing schedule for main components

The following table indicates the suggested perio d for such service measures as cleaning, lubrication and replacement. In practice, the indicated periods will vary widely according to environmental and usage conditions. However, the indicated components should be inspected when a set is b rought for service and the maintenance work performed if necessary. Also note that rubber parts may deform in time, even if the set is not used.

System Parts name

Operation hours

1000H 2000H Drum assembly C,X X A/C head C,X C,X Pinch roller arm assembly C C

Tape transport

Full erase head C C Tension arm assembly C C Capstan motor (Shaft) C C Guide arm assembly C C Capstan motor X Capstan brake assembly X Main brake assembly X

Drive

Belt (Capstan) X X Loading motor X Clutch unit X Worm gear X Control plate X

Other Rotary encoder X

C : Cleaning X : Inspection or Replacement if necessary

1-10 (No.YD002)

A/C head

Video heads

Fig.2-6a

SECTION 3

DISASSEMBLY

3.1 Removing the major parts

3.1.1 Destination of connectors

Two kinds of double-arrows in connection tables respectively

show kinds of connector/wires.

: The connector of the side to remove

CONN. No. PIN No.CONNECTOR

WR2a

WR2b

Main CN101

Main CN103

 Destination of connectors

CONN. No. PIN No.CONNECTOR

WR2a WR2b WR2c WR3a

WR3b CN5302

(CN501) CN7301

(CN502) WR6a WR6b

Main Main Main Main Drum

assembly Regulator

Main Regulator

Regulator

3.1.2 How to read the procedure table

This table shows the steps for disassembly of the externally furnished parts and board assemblies. Reverse these steps when re-assembling them.

Step/

Loc No.

[1] Top cover 3-1a

Part Name

Bracket 2(S1c)

: Wire: Flat wire : Board to board (B-B)

Digital CN761

Digital CN762

CN7104 CN3102 CN3103 CN2001

CN5302 CN7301

CN5303 CN5301

Jack Display Display A/C head

Main DVD

servo control DVD

servo control Main Main

Fig. No.

4(S1a),(S1b),3(L1a), <Note 1a> 2(SD1a),(P1a),(W1a), CN1(WR1a),

----------------------------------------

CN7191 CN7003 CN7004

CN1 CN501 CN502

CN5313 CN5311

Point Note

11 14 14

9 22 22

11 11

3.1.3 Disassembly procedure

Step/

Loc No.

[1] [2]

[3]

[4]

[5] [6]

[7]

Part Name

Top cover Front panel assembly (Display board assembly) (Jack board assembly)

Mechanism assembly (Drum assembly) (Inertia plate)

(Roller arm assembly) DVD unit (Bracket)

Rear cover Regulator board assembly

Main board assembly

Fig. No.

3-1d 3-1a 3-1d

3-1b 3-1c 3-1d

3-1d

3-1d 3-1d

3-1d

Point Note

6(S1a) 4(L2a),5(L2b),2(S2a) CN7104(WR2a), CN3102(WR2b), CN3103(WR2c), CN2001(WR3a) 3(S3a),(S3b)

--------------------------

CN(WR3b) (S3c),(S3d),(S3e)

--------------------------

4(L3a)

--------------------------

(P3a),(L3b) 3(S4a),(L4a),(S4b) 2(S4c),CN5302(CN501) CN7301(CN502) 7(S5a),(S5b),3(L5a) 3(S6a) CN5303(WR6a), CN5301(WR6b) 2(S7a)

< Note 2a >

• Be careful not to damage the connector and wire etc. during connection and disconnection.

• When connecting the flat wire to the connector, be careful with the flat wire direction.

< Note 2b >

• When reattaching the Front panel assembly, make sure that the door opener of the Side frame (R) is lowered in position prior to the reinstallation.

• When reattaching the Front panel assembly, pay careful attention to the switch lever of the Front panel assembly not to make it touch the switch knob of the Main board assembly from the side.

• When reattaching the Front pa nel assembly, lift the Casse tte door slightly.

(1) (2) (3) (4) (5)

(1) Order of steps in Procedure

When reassembling, perform the step(s) in the reverse order. These numbers are also used as the identification (loca-

tion) No. of parts Figures. (2) Part name to be removed or installed. (3) Fig. No. showing procedure or part location. (4) Identification of part to be removed, unhooked, unlocked,

released, unplugged, unclamped or unsoldered.

P= Spring, W= Washer, S= Screw, L= Locking tab, SD=

Solder, CN**(WR**)= Remove the wire (WR**) from the

connector (CN**).

Note:

• The bracketed ( ) WR of the connector symbol are

assigned nos. in priority order and do not correspond to those on the spare parts list.

(5) Adjustment information for installation

Door opener

Side frame(R)

Switch knob

Switch lever

Fig.3-1a

< Note 3a >

• When reattaching the Mechanism assembly, secure the screws (S3a to S3b) in the order of 1,2,3.

< Note 3b >

• When reattaching the Mechanism assembly, be sure to ali gn the phase of the Rotary encoder on the Main board assembly.

• When reattaching the Mechanism assembly, set the “Mechanism assembling mode”. [See “MECHANISM ASSEMBLY SERVICE MANUAL (No. 86700)”.]

• When reattaching the Mechanism assembly to the Main board assembly, take care not to damage the sensors and switch on the Main board assembly.

(No.YD002)1-11

< Note 3c >

• When reattaching the Drum assembly, secure the screws (S3c to S3e) in the order of c, d, e.

(S3d)

Mechanism assembly

(S3c)

(S3e)

(S3d)

(S3e)

Drum assembly

<NOTE> Attach the Drum assembly appropriately, since the installation state of the Drum assembly influences the FM WAVEFORM LINEARITY greatly.

(S3c)

HOOK

Fig.3-1b

• When handling the drum assembly alone, hold it by the motor or shaft. Be careful not to touch other parts, especially the video heads. Also take care not to damage the connectors.

Shaft

Motor

Video heads

Fig.3-1c

1-12 (No.YD002)

HOLD PART OF ROLLER ARM ASS'Y WHILE ATTACHING INERTIA PLATE. INERTIA PLATE SHOULD BE ATTACHED SO AS TO SER SMALL DIAMETER OF CENTRAL ROUND HOLE ABOVE.

POSITION ROLLER'S INSTALLATION HOLE IN THE "A" PART.

INSERT ROLLER UNTIL THE "b" PART OF ROLLER'S HOOK IOCK UP TO THE "B" PART.

HITCH THE "c" PART OF SPRING TO THE "C" PART.

(L3a)

"C"

"A"

Roller arm assembly

(P3a)"c" (L3b)"b"

"B"

[3]Inertia plate

[3]Roller arm assembly

(S1a)

[1]Top cover

(S1a)

(L2b)

Cassete door <Note2b>

[3] Mechanism assembly

(S3a)

(S7a)

[7]Main board assembly

(L2a)

(S3a)

(S2a)

(L2a)

[2]Front panel assembly

(S3c)

(S3d)

(S1a)

[3]Drum assembly

(S3a)

(S3b)

(L5a)

(S5a)

(S5b)

(S5a) (S5a)

(S5a)

(S3e)

(S7a)

Terminal board assembly

2D Digital board assembly

<Phase alignment> .

Accord the position of V gap on R.ENCORDER and PWB silk

Accord the position of Boss on R.ENCORDER and PWB silk

JS3001JS3001

(L5a)

(S4b)

(S4a)

[5]Rear cover

(L5a)

(S4a)

[4]DVD unit

(S4c)

CN7301

(S4a)

(L4a)

[4]Bracket

CN502

DVD servo control board assembly

CN501

(S6a)

CN5302

(S4c)

(S6a)

[6]Regulator board assembly

Jack board assembly

CN7191

(WR2a) <Note2a>

(L2b)

Bottom side

Top side

(L2b)

(WR2b) <Note2b>

Display board assembly

(WR2c) <Note2b>

CN7004

CN7003

Jack board assembly

Fig.3-1d

CN7104

CN7191

(WR3b) <Note2b>

CN2001

(WR3a) <Note2b>

CN3102

CN5001

(WR6a) <Note2b>

CN5303 CN5301

CN5311CN5313

(WR6b) <Note2b>

CN3103

(No.YD002)1-13

3.2 Loading mechanism assembly

Projection of the tray

3.2.1 Removing the tray (See Figure 3-2a, Figure 3-2b, Figure 3-2c, Figure 3-2d, Figure 3-2e, Figure 3-2f)

(1) Push a of the slide cam on the hole in the right side of the

loading base by using a driver until it stops. (See Figure 32a.)

(2) The tray comes out. Pull the tray in a front direction until it

stops.

(3) Remove the two screws A attaching the slide bracket. (See

Figure 3-2b.)

(4) Tilt the tray in a direction of the arrow around the po int in

the left rear part of the tray. (See Figure 3-2c.)

(5) The rail of the tray is removed from b of the loading base.

Then, remove the tray upward. (See Figure 3-2d.)

Attaching the tray:

Engage c of the loading base to the projection of the tray while tilting the tray to the left. Turn the tray in a direction of the arrow, and attach the slide bracket. (See Figure 3-2e.)

Note:

Prior to the procedure above, move the slide cam in a direction of the arrow so that d of the slide cam can be inserted in e of the tray. (See Figure 3-2f.)

Tray

The point in the left rear part

Fig.3-2c

Tray

Push

Slide cam part a

Slide bracket

Fig.3-2a

Fig.3-2b

Loading base

Tray

Loading base part b

Rail of the tray

Fig.3-2d

Projection of the tray

Loading base part c

Fig.3-2e

Part e

1-14 (No.YD002)

Part d

Slide cam

Fig.3-2f

3.2.2 Removing the traverse mechanism assembly (See Figure 3-2g)

Shaft

Reverse the loading mechanism assembly. Remove the four screws B attaching the traverse mechanism assembly. Remove the traverse mechanism assembly upward.

Loading mechanism assembly

3.2.3 Removing the elevator (See Figure 3-2h and Figure 3-2j)

• Prior to the following procedure, remove the traverse mechanism assembly. (1) Remove the two arms of the elevator from the two parts f

by moving the arms in a direction of the arrow.

(2) Pull out the elevator in a rear directi o n .

Attaching the elevator:

Engage the two holes g to the two shafts on the front part of the elevator. And then, attach the elevator.

Elevator

Traverse mechanism assembly

Fig.3-2g

Elevator

Shaft

Slide cam

Part f

Fig.3-2j

Part

Fig.3-2h

(No.YD002)1-15

3.2.4 Removing the loading motor (See Figure 3-2k and Figure 3-2l)

• Prior to the following procedure, remove the tray, the traverse mechanism assembly, and the elevator. (1) Remove the belt from the pulley. (2) Remove two screws C attaching the loading motor. (3) Remove two solders h on the switch board.

Pulley

Loading base

Slide cam

Belt

Pulley

3.3 Traverse mechanism assembly

3.3.1 Removing the pickup (See Figure 3-3a, Figure 3-3b)

• Prior to the following procedure, remove the traverse mechanism assembly. (1) Remove one screw D attaching the plate. (2) Remove the plate and the leaf spring. (3) Lift i of the shaft 1, and pull out the shaft 1 from j. (4) Remove k of the pickup from the shaft 2.

Attaching the pickup:

(1) Engage k of the pickup to the shaft 2. (2) Insert the shaft 1 in j, and attach the shaft 1 to i. (3) Attach the leaf spring, and then attach the plate. Fix the

leaf spring and the plate by using the screw D.

Fig.3-2k

Switch board

Loading motor

Part h

Fig.3-2l

Leaf spring

Plate

Fig.3-3a

1-16 (No.YD002)

Shaft 2

Part k

Part j

Shaft 1

Part i

Fig.3-3b

SECTION 4

ADJUSTMENT

4.1 Before adjustment

4.1.1 Precaution

• The adjustments of this unit include the mechanism com-

patibility and electrical adjustments. During the performance of this work, be sure to observe the precautions for each type of adjustment.

• If there is a reference to a signal input method in the signal

column of the adjustment chart, “Ext. S-input” means the Y/C separated video signal and “Ext. input” means the composite video signal input.

• Unless otherwise specified, all measuring points and

adjustment parts are located on the Main board.

4.1.2 Required test equipments

• Color (colour) television or monitor

• Oscilloscope: wide-band, dual-trace, triggered delayed sweep

• Signal generator: RF / IF sweep / marker

• Signal generator: stairstep, color (colour) bar [PAL]

• Recording tape

• Digit-key remote controller(provided)

4.1.3 Required adjustment tools

: Used --- : Not used

Mechanism

compatibility

adjustment

Roller driver Jig RCU --- Back tension cassette gauge --- Alignment tape(MHPE) --- Alignment tape(MHPE-L) Alignment tape(MHP-L)

Roller driver

PTU94002

Jig RCU

PTU94023B

---

Back tension cassette gauge

Electrical

adjustment

---

PUJ48076-2

4.1.4 Color (colour) bar signal,Color (colour) bar pattern

Colour bar signal [PAL]

White(100%)

White(75%)

0.7 V

0.3 V

Horizontal sync

Yellow

Cyan

Green

Magenta

Red

V(R-Y) U(B-Y)

Blue

Burst

Colour bar pattern [PAL]

(75%)

Cyan

White

Yellow

0.3 V V

White

U Black

100%

Green

Magenta

Red

Blue

4.1.5 Switch settings

When adjusting this unit, set the VCR mode and switches as described below.

• When using the Jig RCU, it is required to set the VCR to the Jig RCU mode. (See "SECTION 2 SPECIFIC SERVICE INSTRUCTIONS")

Jig RCU [Data transmitting method]

Depress the " "( 3 ) button after the data code is set.

CUSTOM CODE 43: A CODE

DATA CODE

INITIAL MODE

Fig.4-1a Jig RCU [PTU94023B]

• Set the switches as shown below unless otherwise specified on the relevant adjustment chart. The switches that are not listed below can be set as desired. If the VCR is not equipped with the functions detailed below , setup is not required.

AUTO PICTURE/VIDEO CALIBRATION/ B.E.S.T./D.S.P.C.

PICTURE CONTROL/SMART PICTURE NORMAL/NATURAL VIDEO STABILIZER OFF TBC ON Digital 3R ON VIDEO NAVIGATION/TAPE MANAGER OFF BLUE BACK OFF

OFF

Alignment tape

(SP, stairstep, PAL)

MHPE

CD-DA test disc

CTS-1000

Alignment tape

(LP, stairstep, PAL)

MHPE-L

DVD test disc

VT-501

4.1.6 Manual tracking mode (Auto tracking ON/OFF) set-

ting

(1) In order to set to the manual tracking mode during tape

playback, press the “SP/EP(LP)”button on the remote control unit.

• Each press of the button switches the auto tracking ON or OFF.

• When the manual tracking mode is set, the tracking is placed at the center position.

(2) Press “channel +/-” to adjust the tracking manually.

(No.YD002)1-17

4.1.7 EVR Adjustment

Some of the electrical adjustments require the adjustment performed by the EVR system. The main unit have EEPROMs for storing the EVR adjustment data and user setups.

Notes:

• In the EVR adjustment mode, the value is varied with the

channel buttons (+, -). The adjusted data is stored when the setting mode changes (from PB to STOP, when the tape speed is changed, etc.). Take care to identify the current mode of each adjustment item when making an adjustment.

• When changing the address setting in the EVR adju st-

ment mode, use the Jig RCU or the remote controller having numeric keypad with which a numeric code can be directly input. The remote control code of the Jig RCU corresponds to each of the digit keys on the remote controller as follows.

Digit-key0123456789

Code 20 21 22 23 24 25 26 27 28 29

• As the counter indication and remaining tape indication

are not displayed FDP during the EVR adjustment mode, check them on the TV monitor screen.

• When performing the EVR adjustment, confirm th at the

FDP indication is changed to the EVR mode, as shown below.

FDP

Fig.4-1b EVR mode

4.2 Mechanism compatibility adjustment [VHS SECTION] Notes:

• Although compatibility adjustment is very important, it

is not necessary to perform this as part of the normal servicing work. It will be required when you have replaced the A/C head, drum assembly or any pa rt of the tape transport system.

• To prevent damaging the alignment tape in the compatibil-

ity adjustment, prepare a cassette tape (for self-recording/ playback), perform a test on it by transporting it and making sure that the tape is not bent by the tape transport mechanisms such as in the guide rollers.(See Fig.4-2b.)

4.2.1 Tension pole position Notes:

• This adjustment must be performed every time the ten-

sion band is replaced.

Signal (A) • Back tension cassette gauge [PUJ48076-2] Mode (B1)

Adjustment part (F) • Adjust pin [Mechansim assembly] Specified value (G) • 25 - 51 gfcm (2.45 - 5 x 10

(B2)

•PB

• Eject end

Nm)

(1) Play back the back tension cassette gauge (A). (2) Check that the indicated value on the left side gauge is

within the specified value (G).

(3) If the indicated value is not within the specified value (G),

perform the adjustment in a following procedure.(See Fig.4-2a.)

a) Remove the top frame, cassette holder and side

frames (L/R) all together. (refer to the SERVICE MANUAL No.86700 [MECHANISM ASSEMBLY].)

b) Rotate the loading motor gear to move the control

plate so that the triangular stamping to the left of the “P”stamping is aligned with the stamping (a) on the main deck. This positioning is mode (B1).

c) Adjust by turning the adju st ment pin so th at th e ti p of

the tension arm is aligned with the stamping (b) on the main deck.

d) Rotate the reel disk (S) by about one turn clockwise

and make sure that the round hole of the adjustment pin is located in the “OK” range. If it is outside this

range, restart the adjustment from the beginning. After completion of the adjustment, rotate the loading gear motor to return it to the mode (B2) position.

1-18 (No.YD002)

TENSION ARM

Stamping(b)

ADJUST PIN

CONTROL PLATE

Stamping(a)

Fig.4-2a

4.2.2 FM waveform linearity

Signal (A1) Mode (B) • PB

Equipment (C) • Oscilloscope Measuring point (D) • TP106 (PB. FM) External trigger (E) • TP111 (D.FF) Adjustment part (F) • Guide roller [Mechanism assembly] Specified value (G) • Flat V.PB FM waveform Adjustment tool (H) • Roller driver [PTU94002]

• Alignment tape(SP, stairstep, PAL) [MHPE]

(A2)

• Alignment tape(LP, stairstep, PAL) [MHPE-L]

(1) Play back the alignment tape (A1). (2) Apply the external trigger signal to D.FF (E), to observe

the V.PB FM waveform at the measuring point (D). (3) Set the VCR to the manual tracking mode. (4) Make sure that there is no significant level drop of the V.PB

FM waveform caused by the tracking operation, with its

generally parallel and linear variation ensured. Perform the

following adjustments when required. (See Fig. 4-2c.) (5) Reduce the V.PB FM waveform by the tracking operation.

If a drop in level is found on the left side, turn the guide roll-

er of the pole base assembly (supply side) with the roller

driver to make the V.PB FM waveform linear.

If a drop in level is on the right side, likewise turn the guide

roller of the pole base assembly (take-up side) with the

roller driver to make it linear. (See Fig. 4-2c.) (6) Make sure that the V.PB FM waveform varies in parallel

and linearly with the tracking operation again. When re-

quired, perform fine-adjustment of the guide roller of the

pole base assembly (supply or take-up side). (7) Unload the cassette tape once, play back the alignment

tape (A1) again and confirm the V.PB FM waveform. (8) After adjustment, confirm that the tape wrinkling does not

occur at the roller upper or lower limits. (See Fig. 4-2b.)

[Perform adjustment step (9) only for the models equipped

with SP mode and EP (or LP) mode.]

[Perform adjustment step (9) only for the models

equipped with SP mode and EP (or LP) mode.]

(9) Repeat steps (1) to (8) by using the alignment tape (A2).

Improper

(a)

GUIDE ROLLER

(b)

GUIDE POLE

Proper

Fig.4-2b

Proper waveform variation

Improper waveform variation

Up Down

Roller driver

Guide roller (supply side)

Fig.4-2c

4.2.3 Height and tilt of the A/C head Note:

• Set a temporary level of the height of the A/C head in ad-

vance to make the adjustment easier after the A/C head has been replaced. (Refer to the SERVICE MANUAL No.86700 [MECHANISM ASSEMBLY].)

Signal (A) • Alignment tape(SP, stairstep, PAL) [MHPE] Mode (B) • PB Equipment (C) • Oscilloscope Measuring point (D1)

External trigger (E) • TP111 (D.FF) Adjustment part (F) • A/C head [Mechanism assembly] Specified value (G) • Maximum waveform

• AUDIO OUT terminal

(D2)

• TP4001 (CTL. P)

(1) Play back the alignment tape (A). (2) Apply the external trigger signal to D.FF (E), to observe the

AUDIO OUT waveform and Control pulse waveform at the

measuring points (D1) and (D2) in the ALT mode. (3) Set the VCR to the manual tracking mode. (4) Adjust the AUDIO OUT waveform and Control pulse wave-

form by turning the screws (1), (2) and (3) little by little until

both waveforms reach maximum. The screw (1)

and (3) are for adjustment of tilt and the screw (2) for azi-

muth.

Head base

(2)

(1)

AUDIO OUT

A/C head

CTL. P

(3)

Fig.4-2d

(No.YD002)1-19

4.2.4 A/C head phase (X-value)

Signal (A1) Mode (B) • PB

Equipment (C) • Oscilloscope Measuring point (D) • TP106 (PB. FM) External trigger (E) • TP111 (D.FF) Adjustment part (F) • A/C head base [Mechanism assembly] Specified value (G) • Flat V.PB FM waveform Adjustment tool (H) • Roller driver [PTU94002]

• Alignment tape(SP, stairstep, PAL) [MHPE]

(A2)

• Alignment tape(LP,stairstep,PAL) [MHPE-L]

(1) Play back the alignment tape (A1). (2) Apply the external trigger signal to D.FF (E), to observe the

V.PB FM waveform at the measuring point (D). (3) Set the VCR to the manual tracking mode. (4) Loosen the screws (4) and (5), then set the Roller driver to

the innermost projected part of the A/C head. (See Fig. 4-

2e.) (5) Rotate the roller driver so that the A/C head comes closest

to the capstan. From there, move the A/C head back grad-

ually toward the drum until the point where the FM wave-

form is maximized for the second time, and then

tighten the screws (4) and (5) temporarily. (6) Play an alignment tape (A2) and set to the manual-tracking

mode. (7) Fine-adjust A/C head base position to maximize the FM

waveform, and then tighten the screws (4) and (5) firmly. (8) Play alignment tapes (A1) and (A2) and confirm that the FM

waveforms are maximized when the tracking is at the cen-

ter position.

To the drum

Toward the capstan

Toward the drum

A/C head

Screw (5)

Roller driver

Screw (4)

Head base

To the capstan

Fig.4-2e

Alignment tape [SP, stairstep] played with the SP head

Waveform output

X-value adjustment point

Drum side Control head position Capstan side

Alignment tape [EP(LP), stairstep] played with the EP(LP) head

Maximum

Fig.4-2f

4.3 Electrical adjustment [VHS SECTION] Note:

The following adjustment procedures are not only necessary after replacement of consumable mechanical parts or board assemblies, but are also provided as references to be referred to when servicing the electrical circuitry. In case of trouble with the electrical circuitry, always begin a service by identifying the defective points by using the measuring instruments as described in the following electrical adjustment procedures. After this, proceed to the repair, replacement and/or adjustment. If the required measuring instruments are not available in the field, do not change the adjustment parts (variable resistor, etc.) carelessly.

4.3.1 Servo circuit

4.3.1.1 Switching point

Signal (A1) Mode (B) • PB

Equipment (C) • Oscilloscope Measuring point (D) • VIDEO OUT terminal (75 ohm terminated)

External trigger (E) • TP111 (D.FF) Adjustment part (F) • Jig RCU: Code “5A” Specified value (G) • 6.5±0.5H (VHS models)

Adjustment tool (H) • Jig RCU [PTU94023B]

• Stairstep signal

(A2)

• Alignment tape(LP,stairstep,PAL) [MHPE-L]

• TP106 (PB. FM)

• 7.5±0.5H (S-VHS models)

(1) Play back the signal (A1) of the alignment tape (A2). (2) Apply the external trigger signal to D.FF (E) to observe the

VIDEO OUT waveform and V.PB FM waveform at the mea-

suring points (D1) and (D2). (3) Set the VCR to the manual tracking mode. (4) Adjust tracking so that the V.PB FM waveform becomes

maximum. (5) Set the VCR to the Auto adjust mode by transmitting the

code (F) from the Jig RCU. When the VCR enters the stop

mode, the adjustment is completed. (6) If the VCR enters the eject mode, repeat steps (1) to (5)

again. (7) Play back the alignment tape (A2) again, confirm that the

switching point is the specified value (G).

Trigger point

Switching point

V.sync

V. rate

Fig.4-3a Switching point

4.3.1.2 Slow tracking preset

Signal (A1) Mode (B1) Measuring point (D) • TV-Monitor

Adjustment part (F) • Jig RCU: Code “71”or “72” Specified value (G) • minimum noise Adjustment tool (H) • Jig RCU [PTU94023B]

• Ext. input

(A2)

• Color (colour) bar signal [PAL]

• VHS SP

(B2)

•VHS LP

1-20 (No.YD002)

(1) Record the signal (A2) in the mode (B1), and play back

the recorded signal. (2) Set the VCR to the manual tracking mode. (3) Set the VCR to the FWD slow (+1/6x) mode. (4) Transmit the code (F) from the Jig RCU to adjust so that the

noise bar becomes the specified value (G) on the TV

monitor in the slow mode. (5) Set the VCR to the Stop mode. (6) Confirm that the noise bar is (G) on the TV monitor in the

slow mode. (7) Repeat steps (3) to (6) in the REV slow (-1/6x) mode. (8) Repeat steps (1) to (7) in the mode (B2).

Note:

• For FWD slow (+1/6x) playback, transmit the code “08”

from the Jig RCU to enter the slow playback mode, and transmit the code “D0”for REV slow (-1/6x) mode.

4.3.2 Video circuit

4.3.2.1 EE Y/PB Y (S-VHS) level

Signal (A1)

Mode (B1)

Equipment (C) • Oscilloscope Measuring point (D) • Y OUT terminal EVR mode

EVR address

Specified value (G) • 1.00 ± 0.05 Vp-p (75 ohm terminated) Adjustment tool (H) • Jig RCU [PTU94023B]

• Ext. S-input

(A2)

• Ext. input

(A3)

• Color (colour) bar signal [PAL]

• EE SP

(B2)

•S-VHS SP

(B3)

•VHS SP

(F1)

• Jig code “57”

(F2)

• A : 11

(F3)

• Jig code “21” twice

(F4)

• Jig code “18” or “19” (Channel +/-)

(1) Input the signal (A3) from the input point (A1). (2) Set the VCR to the mode (B1). (3) Observe the Y OUT waveform at the measuring point (D). (4) Set the VCR to the EVR mode by transmitting the code (F1)

from the Jig RCU. (5) Set the EVR address to (F2) by transmitting the code (F3)

from the Jig RCU. (6) Transmit the code (F4) from the Jig RCU to adjust so that

the Y level of the Y OUT waveform becomes the specified

value (G). (7) Release the EVR mode of the VCR by transmitting the

code (F1) from the Jig RCU again. (When the EVR mode

is released, the adjusted data is memorized.) (8) Input the signal (A3) from the input point (A2). (9) Repeat steps (3) to (7) in the mode (B1).

(10) Record the signal (A3) in the mode (B2), and play back the

recorded signal.

(11) Set the VCR to the manual tracking mode. (12) Repeat steps (3) to (7) in the mode (B2). (13) Record the signal (A3) in the mode (B3), and play back the

recorded signal.

(14) Set the VCR to the manual tracking mode. (15) Repeat steps (3) to (7) in the mode (B3).

4.3.3 Syscon circuit Notes:

• When perform this adjustment, remove the Mechanism

assembly.

4.3.3.1 Timer clock

Signal (A1) • No signal Mode (B) • EE Equipment (C) • Frequency counter Measuring point (D1)

Adjustment part (F) • C3025 (TIMER CLOCK) Specified value (G) • 1024.008 ± 0.001 Hz

• IC3001 pin 44

• IC3001 pin 103

(D2)

• C3054 + and -

(D3)

(976.5549 ± 0.0010 usec)

(1) Connect the frequency counter to the measuring point

(D1).

(2) Connect the short wire between the short point (D2) and

Vcc (5V).

(3) Short the leads of capacitor (D3) once in order to reset

the microprocessor of the Syscon.

(4) Disconnect the short wire between the short point (D2)

and Vcc then connect it again.

(5) Adjust the Adjustment part (F) so that the output frequency

becomes the specified value (G).

4.3.4 Audio circuit [S-VHS models] Notes:

• GND (Ground) should be taken from the Tuner shield

case.

4.3.4.1 Audio REC FM

Signal (A1)

Mode (B) • S-VHS LP Equipment (C) • Oscilloscope Measuring point (D) • TP2253 (A. PB. FM) External trigger (E) • TP111 (D.FF) Adjustment part (H) • VR2251 (REC. FM) Specified value (G1)

• Ext. input

• Audio: No signal

(A2)

• Video: Color (colour) bar signal [PAL]

(A3)

• 600 ± 100 mVp-p

(G2)

• More than 400 mVp-p

(1) Apply the external trigger signal to D.FF (E) to observe the

Audio PB FM waveform at the measuring point (D).

(2) Record the signal (A3) with no audio signal input in the

mode (B), and play back the recorded signal. (3) Set the VCR to the manual tracking mode. (4) If the A.PB FM level is not within the specified value (G1),

perform the adjustment in a following procedure. (5) Adjust the adjustment part(F) so that the A. PB FM level of

the higher channel level becomes the specified value(G1).

(Adjust before recording, then confirm it by playing back.) (6) If specified value(G1) is not obtained, adjust the Adjust-

ment part(F) so that the waveform level of the lower chan-

nel level becomes the specified value(G2).(Adjust before

recording, then confirm it by playing back.)

H. rate

Fig.4-3b EE Y/PB Y lebel

Y level

Specified value (G2)

Specified value (G1)

V. rate

Fig.4-3c Audio REC FM

(No.YD002)1-21

4.4 Electrical adjustment (DVD SECTION)

4.4.1 Test mode setting method

(1) Press POWER button then press VCR/DVD repeatedly so that the DVD indicatorlights up. (2) Press the POWER button again to set the stand-by mode. (3) Transmit the code "FA" from the Jig RCU. (4) The FDP shows the test mode content in the form of "∗ 0 ∗". (5) To release test mode, press "POWER" key of the front panel. (6) Each pressing of "SET UP MENU" key of the remote controller in test mode changes the mode as follows.

Becames test mode

Version of firmware

VCRCSDTV D-S-VHS

FDP becames all lighting

Check mode

Not used

4.4.2 Method of displaying versio n of firmware

(1) Set the main body at test mode. (2) Press "SET UP MENU" key of the remote controller once. Then, version number and alphabetical letter of the system controller

and the back end are displayed in the FL display as follows:

FDP (Example)

07_19_16

System controller

4.4.3 Initialization method

Please initialize according to the following procedures in the following case:

• Just after you upgrade the firmware.

• After you confirm the symptoms that a customer points out. First Initialize, and then confirm whether the symptoms are improved or not.

• After servicing, before returning the main body to a customer. (Initialized main body should be returned to a customer.) (1) Set the main body at test mode. (2) Press "PAUSE" key of the front panel or transmit the code "6F" from the Jig RCU. (3) When initialization is completed, the FDP changes from "∗0" to "∗00".(The left "0" of "00" is not always "0". It sho ws parameter

adjustment status.)

4.4.4 All-initialization method

Please perform all-initialization according to the following procedures in the following case:

• Just after you exchange the pick-up.

• Just after you exchange the spindle motor.

• Just after you exchange the traverse mechanism base.

NOTE:

Please perform all-initialization when you exchange the parts above and also when you remove the parts above.

• Just after the flap adjustment of the pick-up guide shaft (1) Set the main body at test mode. (2) Press the "REVERSE SKIP/INDEX ()" key of the remote controller for more than 2 seconds. (3) When all-initialization is completed, the FDP changes from "∗0" to "∗33".

NOTE:

After all-initialization, be sure to perform optimization adjustment of Front End parameter.

Back end Front end

1-22 (No.YD002)

4.4.5 Optimization adjustment of Front End parameter

Adjustment to optimize Front End parameter must be performed in each mechanism assemb ly of this model for high-speed starting.Please perform optimization according to the following p rocedures just after all-initialization i s completed and when FL display shows anything except "∗0" (For example when FDP shows "∗1", "∗2", and "∗3") at test mode.

(1) Press "POWER" button of the front panel to turn the main body on (not to set the main body at test mode). (2) Insert the test disc VT-501 or commercial dual-layer DVD software. (3) Remove the disc when the FL display changes from "READ" to disc information. (4) Perform the same procedures as in (2) and (3) above by using the test disc CTS-1000 or commercial CD-DA software. (5) Set the main body at test mode, and check that the FDP shows "∗0".

NOTE:

Status of this adjustment can be judged by the number displayed at test mode as follows:

DVD adjustment CD adjustment FDP at test mode Adjusted Adjusted ∗0 Not adjusted Adjusted ∗1 Adjusted Not adjusted ∗2 Not adjusted Not adjusted ∗3

NOTE:

As for a disc used for adjustment,

• Disc should be mounted. ("Mounting" means to display "READ" after the disc is inserted and then display the disc information.) Disc need not be played.

• If you do not have test disc either VT-501 (DVD) or CTS-1000 (CD-DA), use a commercial disc (for DVD, dual-layer software) after seeing and checking that the di sc is neit her curved nor foreseen that it may shake at the time of playback.If you use a disc with bad features, starting time may be slow or disc may not be read.

4.4.6 Display of current value of laser

(1) Set the main body at test mode. (2) Press "SET UP MENU" key of the remote controller three times. Then, FDP is displayed "CHECK". (3) The laser current value can be switched between the val ue of CD and that of DVD by pressing the following key of the remote

controller.

FDP (Example)

2530

The number shown in the FDP shows mA of current value of laser.The first two numbers ("25" in "2530") sho ws current value of laser at the time of adjustment after the latest all-initialization, 25mA in this example.The last two numbers ("30" in "2530") shows the present current value of laser, 30mA in this example.The first two numbers ("25" in "2530") usually shows current value of laser at the time of shipment, so you can see how the product has been deteriorated by comparing the first two numbers ("25" in "2530") and the last two numbers ("30" in "2530").

CD:

The laser current value of 65 mA or less is normal.The laser current value of over 66 mA is not normal. Laser diode of the pickup has been deteriorated.

DVD:

The laser current value of 80 mA or less is normal.The laser current value of over 81 mA is not normal. Laser diode of the pickup has been deteriorated.

To return to test mode, press "STOP" button of the front panel.

****

Remote controller "4" key --- Laser of CD Remote controller "5" key --- Laser of DVD

(No.YD002)1-23

4.4.7 Flap adjustment of the pick-up guide shaft

Please perform flap adjustment of the pick-up guide shaft in the following case:

• Just after you exchange the pick-up.

• Just after you exchange the spindle motor.

• Just after you exchange the traverse mechanism base.

NOTE:

Please perform flap adjustment of the pick-up guide shaft when you exchange the parts above and also when you remove the parts above.

• When the reading accuracy of the signal is bad (There is a b lock noise in the screen, Screen stops in the outer circumference of a disc, etc.)

4.4.7.1 Tool for adjustment

* The screwdriver

good on the market

* Test disc

part number : VT-501

*Stud

part number : JIGXVS40 (Note: One of the four studs is not used here.)

* Extension cord part number : EXTXV521CB

XV-521 CN601

MAIN CONNECT

XV-521 CN503

CONT CONNECT

CN706 XV-521

CONT CONNECT

MAIN CONNECT

CN501 XV-521

CN701 XV-521

XV-521 CN502

CONT CONNECT

Used two set of this part.

MAIN CONNECT

1-24 (No.YD002)

4.4.7.2 Preparation for adjustment

(1) Remove the DVD unit.(Refer to the SECTION 3 Removing the major parts) (2) Connect a extention cord between CN502

of DVD servo control board assembly and CN7301 of Main board assembly. (See

Fig.4-4a)

(3) Connect a extention cord between CN501

of DVD servo control board assembly and CN5302 of Regulator board assembly. (See

Fig.4-4a) (4) Remove the DVD servo control board assembly attached the DVD unit. (5) Three stud is attached in a DVD unit. (See Fig.4-4b)

NOTE: The connector of an extended code (right or reverse) since direction of which is also connectable, be careful of the direction which a

relay wire inserts enough It will become the cause of failure if especially a Regulator board side is mistaken.

Stud

DVD unit

CN502

CN501

DVD servo control board assembly

Main board assembly

CN7301 CN7302

Regulator board assembly

Fig.4-4a Fig.4-4b

4.4.7.3 Adjustment

(1) Set the main body at test mode. (2) Press the "SET UP MENU" key of the remote controller three times, and the FDP is displayed "CHECK". (3) Insert a test disc (VT-501), and press the "PLAY" button of the front panel. (4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FDP is displays a jitter value. (5) Turn the adjustment screws on the underside of the traverse mechanism with screw driver until the maximum jitter value is dis-

played on the FDP. (In this model, a bigger jitter value means a better result.)

NOTE:

• Reference values to judge whether the jitter is allowable or not are displayed, instead of actual jitter values.

• Please be sure to perform "all-initialization" and "optimization adjustment of front end parameter" after adjusting.

Loading mechanism assembly

Screw a

Screw b

FDP (Example)

1241

****

Traverse mechanism assembly

POINT:

Turn the adjustment screws a and b to the same angle in the right direction.

Screw c

And turn the adjustment screws a and b to the same angle in the left direction. Then, turn the screws a and b in either the right or the left direction to increase the number of jitter. Don't turn the adjustment screw c.

Remote controller "6" key-Jitter value

(No.YD002)1-25

SECTION 5

TROUBLESHOOTING

5.1 Manually removing the cassette tape

If you cannot remove the cassette tape which is loaded because of any electrical or mechanical failures, manually remove it by taking the following steps.

(1) Unplug the power cord plug from the power outlet. (2) Refer to the disassembly procedure of the VCR and p er-

form the disassembly of the major parts before removing the mechanism assembly. (See Fig. 5-1a)

Fig.5-1a

Tension arm assembly

Pole base assembly

Pinch roller arm assembly

(3) Unload the pole base assembly by manually turning the

gear of the loading motor until the pole base assembly is hidden behind the cassette lid. In doing so, hold the tape by the hand to keep the slack away from any grease. (See Fig.5-1b )

In case of mechanical failures, while keeping the tension arm assembly free from tension, pull out the tape on the pole base assembly. Take the spring(a) of the pinch roller arm assembly off the hook, and detach it from the tape.

(4) Remove the screw (a) of the side frame (L/R). (5) Hold the slack tape and cassette cover together, lift the

cassette tape, top frame, cassette holder and side frames (L, R) together from the rear and remove them by dis-engaging the hooks (a) and (b).

Screw(a)

Cassette tape

Hook(a)

Cassette holder

Top frame

Side frame(R)

Screw(a)

Spring(a)

Direction of unloading

Fig.5-1b

Side frame(L)

Hook(b)

Fig.5-1c

(6) Take up the slack of the tape into the cassette. This com-

pletes removal of the cassette tape.

5.2 Manually removing the disk(DVD/CD)

If you cannot remove the disk which is loaded because of any electrical or mechanical failures, manually remove it by taking the following steps.

(1) Unplug the power cord plug from the power outlet. (2) Remove the top cover and front panel assembly.

(Refer to the disassembly procedure and perform th e disassembly of the major parts before removing)

(3) Turn the Middle gear (a) by hand to open the disk tray.(See

Fig. 5-2a)

DVD unit

Middle gear (a)

1-26 (No.YD002)

Unloading

Fig.5-2a

5.3 Emergency display function (VHS SECTION)

This unit saves details of the last two emergencies as the EMG history and allows the status of the VCR and the mechanism o f each emergency to be shown both on the display and as OSD information. When using the emergency function, it is required to set the VCR to the Jig RCU mode.

Jig RCU

[Data transmitting method]

Depress the " " ( 3 ) button

after the data code is set.

CUSTOM CODE 43: A CODE

DATA CODE

INITIAL MODE

Fig.5-3a Jig RCU [PTU94023B]

5.3.1 Displaying the EMG information

The EMG detail of information can be displayed by transmitting the code "59" from the Jig RCU.

Note:

• The EMG detail information < 1 >< 2 > show the informa-

tion on the latest EMG. It becomes “ - - : - - : - - ” when there is no latest EMG record.

0: 00

E: **

1E: **

1: *1

2: *2

3: 34

4: *5

5: *6

6: *7

7: *8

8: *9

9: *10

Normal display

EMG content display (Latest) See 5.3.4

EMG content display (Previous) See 5.3.4

EMG detail information <1> See 5.3.5 [Deck operation mode] EMG detail information <1> See 5.3.5 [Mechanism operation mode] EMG detail information <1> See 5.3.5 [Mechanism sensor information and Mechanism mode position] EMG detail information <2> See 5.3.6 [Type of the cassette tape in use <1>] EMG detail information <2> See 5.3.6 [Winding position of the cassette tape in use] EMG detail information <2> See 5.3.6 [Type of the cassette tape in use <2> (Winding area)] EMG detail information <3> See 5.3.7 [Previous deck operation mode] EMG detail information <3> See 5.3.7 [The deck operation mode of the one before the last] EMG detail information <3> See 5.3.7

[The deck operation mode of the one prior to one above]

EMG display of 7 FDP display model

Fig.5-3b

EMG display of FDP display mode

(1) Transmit the code “59” from the Jig RCU.

The FDP shows the EMG content in the form of “E:**:**”.

<Example 1> E : 01

Latest EMG

<Example 2> E : - -

No EMG record

(2) Transmit the code “59” from the Jig RCU again.

The FDP shows the EMG detail information < 1 > in the form of “ *1: *2 : 34 ”.

*1 : Deck operation mode at the moment of EMG *2 : Mechanism operation mode at the moment of EMG 3- : Mechanism sensor information at the moment of EMG

-4 : Mechanism mode position at the moment of EMG

(3) Transmit the code “59” from the Jig RCU once again.

The FDP shows the EMG detail information < 2 > in the form of “ *5 : *6 : *7 ”.

*5 : Type of the cassette tape in use < 1 > . *6 : Winding position of the cassette tape in use *7 : Type of the cassette tape in use < 2 > (Winding area)

(4) Transmit the code “59” from the Jig RCU once again.

The FDP shows the EMG detail information < 3 > in the form of “*8 : *9 : *10”.

*8 : Previous deck operation mode at the moment of EMG *9 : The deck operation mode of the one before the last at

the moment of EMG

*10: The deck operation mode of the one prior to one

above at the moment of EMG

(5) Transmit the code “59” from the Jig RCU once again to re-

set the display.

(No.YD002)1-27

5.3.2 Clearing the EMG history

(1) Display the EMG history. (2) Transmit the code “36” from the Jig RCU. (3) Reset the EMG display.

5.3.3 Details of the OSD display in the EMG display mode

During the EMG display, the OSD shows the data on the deck mode, etc. The details of the display contents are as follows.

Notes:

• The display is variable depending on the part No. of the

System Control microcomputer (IC3001) built into the VCR. In the following, refer to the figure carrying the same two characters as the top two characters o f the part number of your IC.

• The sensor information in the OSD display conten ts is

partially different from the mechanism sensor information in EMG detail information < 1 >.

[For MN* only]

AA BB CC DD EE FF GG HH I I JJ KK LL MM NN OO PP QQ RR SS TT UU VV WW XX YY

AA : Deck operation mode (See EMG detail information < 1 >.) BB : Mechanism operation mode

(See EMG detail of information < 1 >.) CC : Mechanism transition flag DD : Capstan motor control status EE : Loading motor control status FF : Sensor information (See sensor information details.) GG : Capstan motor speed HH : Key code (JVC code) I I : Supply reel winding diameter data higher 8 bits. JJ : Supply reel winding diameter data lower 8 bits. KK : Mechanism sensor information & mechanism mode posi-

tion(See EMG detail of information < 1 >.) LL : Tape speed data higher 8 bits. MM : Tape speed data lower 8 bits. NN : Cassette tape type < 2 > higher 8 bits.

(See EMG detail of information < 2 >.) OO : Cassette tape type < 2 > lower 8 bits.

(See EMG detail of information < 2 >.) PP : General data display area

YY : General data display area

*FF:Sensor information details

** h

********

Encoder data

(See Mechanism mode sequence.) Cassette tab present = 1 Cassette tab broken = 0

Cassette absent = 1 Cassette present = 0

Start sensor

End sensor

[For *HD only]

AA BB CC DD EE FF GGGG HHHH

I I JJJJ

KKKK LLLL MMMM

ROM No.

AA : Key code (JVC code) BB : Deck operation mode(See EMG detail information < 1

>.)

CC : Mechanism operation mode (See EMG detail informa-

tion < 1 >.) DD : Sensor information (See sensor information details.) EE : Capstan motor speed (Search, double speed) FF : Tracking value GGGG : Cassette tape type < 2 >, 16 bits.

(See EMG detail information < 2 >.) HHHH : Supply reel winding diameter data I I : Capstan motor speed (FF/REW, double speed) JJJJ : Tape speed data, lower 8 bits. KKKK : General data display area LLLL : General data display area MMMM : General data display area

*DD:Sensor information details

** h

********

Encoder data (See Mechanism mode sequence.)

Remote pause

End sensor

Start sensor

Cassette tab present = 1 Cassette tab broken = 0

[For both MN*/HD*]

Mechanism mode sequence

Mechanism mode - Encoder data

LSA

12345

1110

GND

LSA LSB LSC LSD

No. Position Encoder data

Encoder output = Low

Trerminal - GND = SHORT

EJECT 0 h = 0000

EJECT1 1 h = 0001

EJECT2 2 h = 0010

ULSTOP 3 h = 0011

UPPER 4 h = 0100

ONSTOP(PLAY) 5 h = 0101

FWD/SS 6 h = 0110

REV/SS 7 h = 0111

OFFSTOP 8 h = 1000

FFREW-BRAKE 9 h = 1001

FFREW A h = 1010

MIDDLE F h = 1111

543

Encoder output = High

Trerminal - GND = OPEN

LSD

9876

LSC

LSB

1-28 (No.YD002)

5.3.4 EMG content description Note:

EMG contents “E08/E09” are for the model with Dynamic Drum (DD).

FDP CONTENT CAUSE

E01: Loading EMG

E02:

Unloading EMG

E03: Take Up Reel

Pulse EMG

E04: Drum FG EMG

E05: Cassette Eject

EMG

E06: Capstan FG

EMG

E07: SW Power

Short-Circuit EMG

E08:

DD Initialized (Absolute Position Sensor) EMG

E09: DD FG EMG

E0A: Supply Reel

Pulse EMG

EU1: Head clog warning history

If the mechanism mode does not change to the next mode within 4 seconds after the loading motor starts rotating in the loading direction, while the mechanism is in the after-loading position (with the tape up against the pole base), [E:01] is identified and the power is switched OFF. However, if the tape loading is not completed within 4 seconds after the loading motor starts rotating in the loading direction, the tape is simply unloaded and ejected. No EMG data is recorded in this case.

When the mechanism mode cannot be changed to another mode even when the loading motor has rotated for more than 4 seconds in the unloading direction, [E:02] is identified and the power is turned off.

When the falling edje of the take-up reel pulse has not been generated for more than 4 seconds in the capstan rotating mode, [E:03] is identified, the pinch rollers are turned off and stopped, and the power is turned off. In this case, however, the mechanism should be in position after tape loading. Note that the reel EMG is not detected during Slow/Frame advance operations.

When the drum FG pulse has not been input for more than 3 seconds in the drum rotating mode, [E:04] is identified, the pinch rollers are turned off and stopped, and the power is turned off.

If the cassette does not reach the eject position within about 0.7 seconds after the cassette housing has started the cassette ejection operation, [E:05] is identified, the drive direction is reversed to load the tape, the mode is switched to STOP mode with the pinch roller OFF, and the power is switched OFF. During the cassette insertion process, the drive direction is reversed and the cassette is ejected if the tape is not up against the pole base within about 3 seconds after the start of the cassette pullingin operation. If the cassette does not reach the eject position within about 0.7 seconds after the drive mode reversal operation, [E:05] is identified and the power is switched OFF immediately.

When the capstan FG pulse has not been generated for more than 1 second in the capstan rotating mode, [E:06] is identified, the pinch rollers are turned off and stopped, and the power is turned off.However, the capstan EMG is not detected in SLOW/ STILL modes. Note that, if the part number of the System Control IC begins with "MN" or "M3", the capstan EMG is not detected even during the FF/REW operation.

When short-circuiting of the SW power supply with GND has lasted for 0.5 second or more, [E:07] is identified, all the motors are stopped and the power is turned off.

When DD tilting does not complete in 4 seconds, [E:08] is identified, the tilt motor is stopped and the power is turned off.

When the DD FG pulse is not generated within 2.5 seconds, [E:09] is identified, the tilt motor is stopped and the power is turned off.

When the falling edge of the supply reel pulse has not been generated for more than 10 seconds in the capstan rotating mode, [E:0A] is identified and the cassette is ejected (but the power is not turned off). In this case, however, the mechanism should be in the position after tape loading (with the tape up against the pole base). Also note that the reel EMG is not detected during Slow/ Frame advance operations.

Presupposing the presence of the control pulse output in the PLAY mode, when the value obtained by mixing the two V.FM output channels (without regard to the A.FM output) has remained below a certain threshold level for more than 10 seconds, [E:U1] is identified and recorded in the emergency history. During the period in which the head clog is detected, the FDP shows "U:01" and the OSD repeats the "3 seconds of warning display" and the "7 seconds of noise picture display" alternately.

EMG code : "E:C1" or "E:U1" / FDP : "U:01" / OSD : "Try cleaning tape." or "Use cleaning cassette." The head clog warning is reset when the above-mentioned threshold has been exceeded for more than 2 seconds or the mode is changed to another mode than PLAY.

1. The mechanism is locked in the middle of the mode transition during a tape loading operation.

The mechanism overruns during the tape loading operation because the SYSCON cannot recognize the mechanism mode normally. This problem is due to a cause such as a rotary encoder failure.

Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.)

The mechanism is locked in the middle of mode transition.

Without an eject signal being sent from the SYSCON, unloading is attempted (i.e. Ejection is attempted while the tape is still inside the mechanism.) because the SYSCON cannot recognize the mechanism mode normally. This is due to a cause such as a rotary encoder failure. (Mechanism position: UPPER)

Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.)

The take-up reel pulse is not generated in the FWD transport modes (PLAY/FWD SEARCH/FF, etc.) because;

1) The idler gear is not meshed with the take-up reel gear because the mechanism mal-functions for some reason.

The idler gear is meshed with the take-up reel gear, but incapable of winding due to too large

mechanical load (abnormal tension);

3) The reel is rotating normally but an FG pulse is not generated due to the take-up reel sensor failure.

The supply reel pulse is not generated in the REV transport modes (REV SEARCH/REW, etc.) because;

1) The idler gear is not meshed with the supply reel gear because the mechanism mal-functions for some reason.

2) The idler gear is meshed with the supply reel gear, but incapable of winding due to too large a mechanical load (abnormal tension);

3) The reel rotates normally but the FG pulse is not generated due to a supply reel sensor failure.

Power(SW5V) is not supplied to the reel sensor on the tape winding side.

The drum could not start or the drum rotation has stopped due to too large a load on the tape, because;

1) The tape tension is abnormally high;

2) The tape is damaged or a foreign object (grease, etc.) adheres to the tape.

The drum FG pulse did not reach the System controller CPU because;

1) The signal circuit is disconnected in the middle;

2) The FG pulse generator (hall device) of the drum is faulty.

The drum control voltage (DRUM CTL V) is not supplied to the MDA.

Power (M12V) is not supplied to the drum MDA.

The cassette cannot be ejected due to a failure in the drive mechanism of the housing.

When the housing load increases during ejection, the loading motor is stopped because of lack of headroom in its drive torque.

Housing load increasing factors: Temperature environment (low temperature, etc.), mechanism wear or failure.

The sensor/switch for detecting the end of ejection are not functioning normally.

The loading motor drive voltage is lower than specified or power (M12V) is not supplied to the motor (MDA).

When the user attempted to eject a cassette, a foreign object (or perhaps the user's hand) was caught in the opening of the housing.

The capstan could not start or the capstan rotation has stopped due to too large a load on the tape, because;

1) The tape tension is abnormally high (mechanical lock);

2) The tape is damaged or a foreign object (grease, etc.) is adhered to the tape (occurrence of tape

entangling, etc.).

The capstan FG pulse did not reach the System controller CPU because;

1) The signal circuit is disconnected in the middle;

2) The FG pulse generator (MR device) of the capstans is faulty.

The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA.

Power (M12V, SW5V) are not supplied to the capstan MDA.

The SW 5 V power supply circuit is shorted with GND.

The SW 12 V power supply circuit is shorted with GND.

1. The absolute value sensor is defective. (The soldered parts have separated.)

2. The pull-up resistor at the absolute sensor output is defective. (The soldered parts have separated.)

3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the absolute value sensor.

The absolute value sensor data is not sent to the System Controller CPU.

1. The FG sensor is defective. (The soldered parts have separated.)

2. The pull-up resistor at the FG sensor output is defective. (The soldered parts have separated.)

3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor.

4. The power (5V) to the sensor is not supplied. (Connection failure/soldering failure)

5. The FG pulse is not sent to the System Controller CPU.

The tilt motor is defective. (The soldered parts have separated.)

7. The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)

8. The tilt motor drive MDA - IC is defective.

9. Auto-recovery of the DD tilting cannot take place due to overrun. The supply reel pulse is not generated in the FWD transport mode (PLAY/FWD SEARCH/FF,

1. etc.) because;

1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cassette is cut in the middle;

2) A mechanical factor caused tape slack inside and outside the supply reel side of the cassette shell.

In this case, the supply reel will not rotate until the tape slack is removed by the FWD transport, so the pulse is not generated until then;

3) The reel is rotating normally but the FG pulse is not generated due to a supply reel sensor failure.

The take-up reel pulse is not generated in the REV transport mode (REV SEARCH/REW, etc.).

1) REV SEARCH/REW is started when the tape in the inserted cassette has been cut in the middle;

2) A mechanical factor caused tape slack inside and outside the take-up reel side of the cassette

shell. In this case, the take up will not rotate until the tape slack is removed by the REV transport, so the pulse will not be generated until that time;

3) The reel is rotating normally but the FG pulse is not generated due to a take-up reel sensor failure.

The power (SW 5V) to a reel sensor is not supplied.

(No.YD002)1-29

5.3.5 EMG detail information < 1 >

The status (electrical operation mode) of the VCR and the status (mechanism operation mode/sensor information) of the mechanism in the latest EMG can be confirmed based on the figure in EMG detail information < 1 > .

[FDP/OSD display] *1 : *2 : 34 *1 : Deck operation mode at the moment of EMG

*2 : Mechanism operation mode at the moment of EMG 3- : Mechanism sensor information at the moment of EMG

-4 : Mechanism mode position at the moment of EMG

Note:

• For EMG detailed information < 1 >, the content of the

code that is shown on the displa y (or OSD) differs depending on the parts number of the system contr ol microprocessor (IC3001) of the VCR. The sy stem control microprocessor parts number starts with two letters, refer these to the corresponding table.

*1 : Deck operation mode

[Common table of MN* and HD]

Display

MN* HD*

00 - Mechanism being initialized 01 00 STOP with pinch roller pressure off (or tape present with P.OFF) 02 01 STOP with pinch roller pressure on 03 - POWER OFF as a result of EMG

04 04 PLAY (Normal playback) 0C 0E REC 10 11 Cassette ejected 20 22 FF 21 - Tape fully loaded, START sensor ON, short FF 22 -

24 26 FWD SEARCH (variable speed) including x2-speed 2C 2E INSERT REC 40 43 REW 42 - Cassette identification REV SEARCH before transition to REW

44 47 REV SEARCH (variable speed) 4C 4C AUDIO DUB 6C 6E INSERT REC (VIDEO + AUDIO) 84 84 FWD STILL / SLOW 85 85 REV STILL / SLOW 8C 8F REC PAUSE 8D - Back spacing 8E - Forward spacing (FWD transport mode with BEST function) AC AF INSERT REC PAUSE AD - INSERT REC back spacing CC CD AUDIO DUB PAUSE CD - AUDIO DUB back spacing EC EF INSERT REC (VIDEO + AUDIO) PAUSE ED - INSERT REC (VIDEO + AUDIO) back spacing

Cassette identification FWD SEARCH before transition to FF

(SPx7-speed)

Deck operation mode

*2 : Mechanism operation mode

[Table of MN*]

Display

00 Command standby (No command to be executed) 01 Immediate Power OFF after EMG occurrence 02 Loading from an intermediate position during mechanism initialization 03 Unloading due to EMG occurrence during mechanism initialization 04 Ejecting cassette (ULSTOP to EJECT) 05 Inserting cassette (EJECT to ULSTOP) 06 Loading tape (ULSTOP to PLAY) 07 Unloading tape (PLAY to ULSTOP) 08 Transition from pinch roller ON to STOP 09 Transition from pinch roller OFF to STOP (PLAY to OFFSTOP) 0A Transition from pinch roller OFF to STOP at power OFF 0B Transition from pinch roller ON to STOP at power ON 0C Transition to PLAY 0D Transition to Search FF 0E Transition to REC 0F Transition to FWD STILL/SLOW 10 Transition to REV STILL/SLOW 11 Transition to Search REV 12 Transition from FF/REW to STOP 13 Transition to FF 14 Transition to REW 15 Tape end detection processing during loading 16 Short FWD/REV at tape sensor ON during unloading 17 Transition to FF/REW brake mode

Mechanism operation mode

[Table of HD*]

Display

00 STOP with pinch roller pressure off 01 STOP with pinch roller pressure on 02 U/L STOP (or tape being loaded) 04 PLAY (Normal playback) 05 PLAY (x1-speed playback using JOG) 0E REC 11 Cassette ejected 22 FF 26 FWD SEARCH (variable speed) including x2-speed 2E INSERT REC 43 REW 47 REV SEARCH 4C AUDIO DUB 6E INSERT REC (VIDEO + AUDIO) 84 FWD STILL/SLOW 85 REV STILL/SLOW 8F REC PAUSE AF INSERT REC PAUSE C7 REV SEARCH (x1-speed reverse playback using JOG) CD AUDIO DUB PAUSE EF INSERT REC (VIDEO + AUDIO) PAUSE F0 Mechanism being initialized F1 POWER OFF as a result of EMG F2 Cassette being inserted F3 Cassette being ejected F4 Transition from STOP with pinch roller pressure on to STOP with pinch

roller pressure off F5 Transition from STOP with pinch roller pressure on to PLAY F6 Transition from STOP with pinch roller pressure on to REC F7 Cassette type detection SEARCH before FF/REW is being executed F8 Tape being unloaded F9 Transition from STOP with pinch roller pressure off to STOP with pinch

roller pressure on FA Transition from STOP with pinch roller pressure off to FF/REW FB Transition from STOP with pinch roller pressure off to REC.P (T.REC,etc.) FC Transition from STOP with pinch roller pressure off to cassette type

detection SEARCH FD Short REV being executed after END sensor on during unloading FE Tension loosening being executed after tape loading (STOP with pinch

roller pressure on)

FF Tape being unloaded

Mechanism operation mode

1-30 (No.YD002)

3- : Mechanism sensor information

[Common table of MN* and HD*]

Display

REC safety SW

0- Tab broken ON ON ON 1- Tab broken ON 2- Tab broken ON 3- Tab broken ON OFF 4- Tab present ON 5- Tab present 6- Tab present OFF 7- Tab present OFF 8- Tab broken ON ON 9- Tab broken ON A- Tab broken

B- Tab broken OFF C- Tab present ON D- Tab present

E- Tab present OFF

F- Tab present OFF

Tab broken = 0 Sensor ON = 0 Sensor ON = 0 Tab present = 1 sensor OFF = 1 Sensor OFF = 1

Mechanism sensor informatio n

Start sensor End sensor

OFF

OFF OFF

ON OFF OFF

ON OFF

ON OFF OFF OFF

Mechansim

position sensor

OFF

-4 : Mechanism mode position

[Common table of MN* and HD*]

Mechanism

sensor

information

Dis-

play

Deck operation mode

-0 Not established

-1 EJECT EJECT position

-2 EJECT-EJECT1 Intermodal position

-3 EJECT1 EJECT1 position

-4 EJECT1-EJECT2 Intermodal position

-5 EJECT2 EJECT2 position

-6 EJECT2-ULSTOP Intermodal position

Even number (0, 2, 4, 6, 8, A, C, E)

-7 ULSTOP ULSTOP position

-8 ULSTOP-UPPER Intermodal position

-9 UPPER Loading (unloading) tape

-A UPPER-ONSTOP Intermodal position

-B ONSTOP PLAY position

-C PLAY-FWD/SS Intermodal position

-D FWD/SS

FWD (FWD Still/Slow) position

-E FWD/SS-REV Intermodal position

-F REV

REV (REV Still/Slow) position

-0 REV-OFFSTOP Intermodal position

-1 OFFSTOP Pinch roller OFF position Odd number (1, 3, 5, 7, 9, B, D, F)

-2

OFFSTOP-FFREWB

Intermodal position

-3 FFREWB FF/REW Brake position

-4 FFREWB-FFREW Intermodal position

-5 FFREW FF/REW position

5.3.6 EMG detail information < 2 >

The type of the cassette tape and the cassette tape winding position can be confirmed based on the figure in EMG detail information < 2 > .

Note:

• EMG detail information < 2 > is the reference informa-

tion stored using the remaining tape detecti on func tio n of the cassette tape. As a result, it may not identify cassette correctly when a special cassette tape is used or when the tape has variable thickness.

*5 : Cassette tape type < 1 >

Display Cassette tape type <1>

00 Cassette type not identified 16

Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified 82 Small reel, thick tape (T-120) identified/thin tape (T-140) identified 84 Large reel (T-0 to T-60) identified 92

Small reel, thick tape (T-130) identified/thin tape (T-160 to T-210) identified 93

Small reel, thick tape/C cassette (T-0 to T-100/C cassette) not classified C3

Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified D3

Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified E1 C cassette, thick tape (TC-10 to TC-20) identified E2 Small reel, thick tape (T-0 to T-100) identified E9 C cassette, thin tape (TC-30 to TC-40) identified F1

C cassette, thick tape/thin tape (TC-10 to TC-40) not classified

Notes:

• Cassette tape type < 1 > is identified a few times during

mode transition and the identification count is variable depending on the cassette tape type. If an EMG occurs in the middle of identification, the cassette tape type may not be able to be identified.

• If other value than those listed in the above table is dis-

played, the cassette tape type is not identified.

*6 : Cassette tape winding position

The cassette tape winding position at the moment of EMG is displayed by dividing the entire tape (from the beginning to the end) in 21 sections using a hex number from “00” to “14”.

00 : End of winding 14 : Beginning of winding FF : Tape position not identified

*7 : Cassette tape type < 2 > (Winding area)

Display

00 04 - 08 05 - 06 05 - 0C 06 - 0C 06 - 0C 07 - 08 09 - 0B 0C - 0D 0D - 0F 0E - 10 10 - 12 10 - 13 11 - 14 12 - 14 13 - 14 13 - 14 13 - 14 13 - 14 15 - 16 16 - 17 17 - 18 19 - 1B

Cassette tape type <2>

Cassette type not identified C cassette, thick tape TC-10 Small reel, thick tape T-20 C cassette, thick tape TC-20P C cassette, thin tape TC-40 C cassette, thin tape TC-30 Small reel, thick tape T-40 Small reel, thick tape T-60 Small reel, thick tape T-80(DF-160) Small reel, thick tape T-90(DF-180) Small reel, thick tape T-100 Small reel, thin tape T-140 Small reel, thick tape T-120(DF-240) Small reel, thick tape T-130 Small reel, thin tape T-160 Small reel, thin tape T-210(DF-420) Small reel, thin tape T-180(DF-360) Small reel, thin tape T-168 Small reel, thick tape DF-300 Large reel T-20 Large reel T-30 Large reel T-40 Large reel T-60

(Reference) Word data (Beginning) (End)

(0497 - 0506)(0732 - 0858)

(05A9 - 0661) (0599 - 05FF)(0AA1 - 0C07) (0623 - 063D) (0C41 - 0CC3) (0611 - 0638)(0C0C - 0CB2)

(07CC - 08E5) (09FD - 0B78) (0C20 - 0DFC) (0D31 - 0F3E)

(0E43 - 107F)

(10E1 - 120C)

(1073 - 1313)

(1185 - 1429)

(12D3 - 141F)

(1373 - 14C3)

(1357 - 14C0)

(1395 - 14EE)

(13A8 - 14CE)

(1536 - 1618)

(1647 - 175A)

(1759 - 189C)

(1989 - 1B2F)

Note:

• The values of cassette tape type < 2 > in the above table

are typical values with representative cassette tapes.

5.3.7 EMG detail information < 3 >

Three deck operation modes preceding the deck operation mode in which the EMG occurs may be confirmed based on the figures in the EMG information detail < 3 >. For the con tents of the displayed information, see the table "Deck operation mode" in section "5.3.5 EMG detail information < 1 >".

(No.YD002)1-31

5.4 Troubleshooting (DVD SECTION)

Press OPEN /CLOSE key

Is tray

operation

Confirmation of tray drive circuit

and circuit in surrounding

correct?

Is the traverse moving along the innermost

perimeter for SW detection?

"NO DISC" message appears

immediately after vertical movement of the pick-up lens

The state that DISC does not rotate continues for several seconds, and becomes NO DISC or an error display afterwards. The rotation of DISC becomes high-speed and abnormal, and becomes NO DISC or an error display afterwards.

Is focus retraction OK?

OFF Even when it retracts correctly, if it is out of focus and makes repeated retries with a clicking sound, it is in error.

See "5.5.4 Focus ON error"

in "Check points for individual errors"

Is tracking retraction OK?

See "5.5.3 Traverse movement error" in "Check points for individual errors"

See "5.5.2 Disk detection, distinction error" in "Check points for individual errors"

See "5.5.1 Spindle startup error" in "Check points for individual errors"

Is the inter-layer jump OK?

LO LI

Two layers of DVD only.

5.5.8 Inter-layer jump error

OFF

If TE waveform reappears or fails to converge after the TE retraction, it is in error.

Is the spindle servo

locked correctly?

Is the RF OUT waveform

locked correctly?

1-32 (No.YD002)

See "5.5.5 Tracking ON error"

in "Check points for individual errors"

Has the disc information

been collected?

Stop will result

5.5.7 Address read error

Check 5.5.9, 5.5.10, 5.5.11, and

See "5.5.6 Spindle CLV error"

in "Check points for individual errors"

Is playback

possible?

5.5.12 items in "Check points for individual errors"

OK !

Fig.5-4a

5.5 Check points for each error (DVD SECTION)

5.5.1 Spindle start error

(1) Defective spindle motor

• Are there several ohms resistance between each pin of CN201 (The power supply is turned off and measured.)

• Is the sign wave of about 100mVp-p in the voltage had from each terminal? [ CN201"10"(H1+),"11"(H1-),"7"(H2+),"8"(H2-),"5"(H3+),"6"(H3-) ]

(2) Defective spindle motor driver (IC251

• Has motor drive voltage of a sine wave or a rectangular wave gone out to each terminal(SM1~3) of CN201"1,2,3" and IC251"2,4,7"?

• Is FG pulse output from the terminal of IC251

• Is it "L(about 0.9V)" while terminal of IC251

(3) Has the control signal come from servo IC or the microcomputer?

• Is it "L" while the terminal of IC251 Is it "H" while the terminal of IC251

• Is the control signal input to the terminal of IC251 (changes from VHALF voltage while the motor is working.)

• Is the VHALF voltage input to the terminal of IC251"21"(ECR)?

(4) Is the FG signal input to the servo IC?

• Is FG pulse input to the terminal of IC301

5.5.2 Disc Detection, Distinction error (no disc, no RFENV)

• Laser is defective.

• Front End Processor is defective (IC101

• APC circuit is defective. --- Q101,Q102.

• Pattern is defective. --- Lines for CN101

• IC101 --- For signal from IC101 to IC301, is signal output from IC101 "20" (ASOUT) and IC101 "41"(RFENV) and IC101 "22" (FEOUT)?

)

"24"(FG) according to the rotation of the motor?

"15"(VH) is rotating the motor?

"18"(SBRK) is operating?

"23"(/SPMUTE) is operating?

"22"(EC)?

"69"(FG) according to the rotation of the motor?

- All patterns which relate to pick-up and patterns between IC101

"1-2","2-3","1-3"?

5.5.3 Traverse movement NG

(1) Defective traverse driver

• Has the voltage come between terminal of CN101 "2" and "4" ?

(2) Defective BTL driver (IC201)

• Has the motor drive voltage gone out to IC201

(3) Has the control signal come from servo IC or the microcomputer?

• Is it "H" while the terminal of IC201

• TRSDRV Is the signal input? (IC301

(4) TRVSW is the signal input from microcomputer? (IC301

5.5.4 Focus ON NG

• Is FE output ? --- Pattern, IC101

• Is FODRV signal sent ? (R209) --- Pattern, IC301 "115"

• Is driving voltage sent ? IC201

• Mechanical unit is defective.

5.5.5 Tracking ON NG

• When the tracking loop cannot be drawn in , TE shape of waves does not settle.

• Mechanical unit is defective. Because the self adjustment cannot be normally adjusted, the thing which cannot be normally drawn in is thought.

• Periphery of driver (IC201 Constant or IC it self is defective.

• Servo IC (IC301) When improperly adjusted due to defective IC.

)

"9"(STBY1) ?

"67")

"13", "14" --- If NG, pattern, driver, mechanical unit .

"17" or "18"?

"56")

(No.YD002)1-33

5.5.6 Spindle CLV NG

• IC101

• Does not the input or the output of driver's spindle signal do the grip?

• Has the tracking been turned on?

• Spindle motor and driver is defective.

• Additionally, "IC101

5.5.7 Address read NG

• Besides, the undermentioned cause is thought though specific of the cause is difficult because various factors are thought.

5.5.8 Between layers jump NG (double-layer disc only)

5.5.9 Neither picture nor sound is output

(1) It is not possible search

• Has the tracking been turned on?

• To " Tracking ON NG" in "Check points for each error" when the tracking is not normal.

• Is the feed operation normal?

-- "30"(ARF-), "31(ARF+).

and IC301" and "Mechanism is defective(jitter)", etc. are thought.

Mechanism is defective. (jitter)

IC301

The disc is dirty or the wound has adhered.

Mechanism defective Defect of driver's IC(IC201 Defect of servo control IC(IC301)

To " traverse movement NG" in "Check points for each error" when it is not normal.Are not there caught of the feeding mechanism etc?

)

5.5.10 Picture is distorted or abnormal sound occurs at intervals of several seconds.

Is the feed operation normal? Are not there caught of the feeding mechanism etc?

5.5.11 Others

• The image is sometimes blocked, and the image stops.

• The image is blocked when going to outer though it is normal in suroundings in the disk and the stopping sympton increases.

There is a possibility with bad jitter value for such a symptom.

5.5.12 CD During normal playback operation

(1) Is TOC reading normal?

• Displays total time for CD-DA.

• Shifts to double-speed mode for V-CD (2) Is playback afterwards possible? (3) When can not do a normal playback

• --:-- is displayed during FL search.

According to [It is not possible to search ] for DVD, check the feed and tracking systems.

• No sound is output although the time is displayed.(CA-DA)

DAC, etc, other than servo.

• The passage of time is not stable, or picture is abnormal.(V-CD)

• The wound of the disc and dirt are confirmed.

1-34 (No.YD002)

(No.YD002)1-35

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY VIDEO RECORDER CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefect ure, 221-8528, Japan

(No.YD002)

Printed in Japan

WPC

JVC HR-XV31EK, HR-XV31EX, HR-XV32EK, HR-XV3EK, HR-XV3EX Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1.1 SAFTY PRECAUTIONS

1.2 Preventing static electricity

1.3 Important for laser products

1.4 Precautions for Service

2.1 Different table of feature

2.2 Service position

2.3 Jig RCU mode

2.4 Mechanism service mode

2.5 Maintenance and inspection

3.1 Removing the major parts

3.2 Loading mechanism assembly

3.3 Traverse mechanism assembly

4.1 Before adjustment

4.2 Mechanism compatibility adjustment [VHS SECTION] Notes:

4.3 Electrical adjustment [VHS SECTION] Note:

4.4 Electrical adjustment (DVD SECTION)

5.1 Manually removing the cassette tape

5.2 Manually removing the disk(DVD/CD)

5.3 Emergency display function (VHS SECTION)

5.4 Troubleshooting (DVD SECTION)

5.5 Check points for each error (DVD SECTION)