Sony HCDC-7-NT Service manual

HCD-C7NT

SERVICE MANUAL

Ver. 1.1 2005.02

HCD-C7NT is the Amplifier, CD player, MD Deck and Tuner section in CMT-C7NT.

CD Section

MD Section

AEP Model

UK Model

E Model

Model Name Using Similar Mechanism HCD-C5 CD Mechanism Type TN-CCD1001Z Base Unit Name TT BASE ASSY Optical Pick-up Name OPTIMA-720L1E Model Name Using Similar Mechanism New MD Mechanism Type MDM-7X2B Optical Pick-up Name KMS-262E

Amplifier section

European model:

DIN power output (rated): 15 + 15 W

Continuous RMS power output (reference):

Music power output (reference):

Other models:

The following measured at 220 V AC, 60 Hz DIN power output (rated): 15 + 15 W

Continuous RMS power output (reference):

Inputs TAPE IN (stereo minijack):

DIGITAL OPTICAL IN (Supported sampling frequencies: 32 kHz, 44.1 kHz and 48 kHz)

Outputs TAPE OUT (stereo minijack):

PHONES (stereo minijack):

(6 ohms at 1 kHz, DIN)

20 + 20 W (6 ohms at 1 kHz, 10% THD)

45 + 45 W

(6 ohms at 1 kHz, DIN)

20 + 20 W (6 ohms at 1 kHz, 10% THD)

Sensitivity 250 mV, impedance 47 kilohms

Sensitivity 250 mV, impedance 1 kilohm

Accepts headphones with an impedance of 8 ohms or more

SPECIFICATIONS

CD player section

System Compact disc and digital

Laser Semiconductor laser

Frequency response 2 Hz – 20 kHz

MD deck section

System MiniDisc digital audio

Laser Semiconductor laser

Sampling frequency 44.1 kHz Frequency response 5 Hz – 20 kHz

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz

Antenna FM wire antenna Antenna terminals 75 ohm unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range European model: 531 – 1,602 kHz

Other models: 530 – 1,710 kHz

Antenna AM loop antenna, external

Intermediate frequency 450 kHz

audio system

(λ = 780 nm) Emission duration: continuous

system

(λ=780 nm) Emission duration: continuous

(50-kHz step)

(with the tuning interval set at 9 kHz)

(with the tuning interval set at 10 kHz) 531 – 1,602 kHz (with the tuning interval set at 9 kHz)

antenna terminal

General

Power requirements European model: 230 V AC, 50/60 Hz Other models: 220 V AC , 50/60 Hz

Power consumption European model: See the nameplate

Other models: See the nameplate

Dimensions (w/h/d) Approx. 145 × 125 ×

Mass Approx. 4.5 kg

Supplied accessories Remote commander (1)

Design and specifications are subject to change without notice.

0.5 W (at the power saving mode)

273 mm incl. projecting parts and controls

FM wire antenna (1) AM loop antenna (1) USB cable (1) Operating Instructions (1) M-crew for CMT-C7NT/ OpenMG Jukebox for Net MD CD-ROM (1) M-crew Operating Instructions (1) OpenMG Jukebox for Net MD Operating Instructions (1) Warranty (1)

9-873-685-02

MICRO HI-FI COMPONENT SYSTEM

Sony Corporation

Personal Audio Group Published by Sony Engineering Corporation

HCD-C7NT

The self-diagnosis function consists of error codes for customers, which are displayed automatically when errors occur, and error codes, which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for using the Self-Diagnosis Function (Error History Display Mode)”.

SELF-DIAGNOSIS FUNCTION

Self-diagnosis display

This system has a Self-diagnosis display function to let you know if there is a system malfunction. The display shows a code made up of 3 or 5 letters and a message alternately to show you the problem. To solve the problem refer to the following list. If any problem persists, consult your nearest Sony dealer.

C11/Protected

The MD is protected against erasure. cRemove the MD and slide the tab to close the

slot (see page 19).

C12/Cannot Copy

You tried to record a CD or MD with a format that the system does not support, such as a CD-ROM.

cRemove the disc and turn off the system once,

then turn it on again.

C13/REC Error

Recording could not be performed properly. cMove the system to a stable place, and start

recording over from the beginning.

The MD is dirty or scratched, or the MD does not meet the standards.

cReplace the MD and start recording over from

the beginning.

C13/Read Error

The MD deck cannot read the disc information properly.

cRemove the MD once, then load it again.

C14/Toc Error

The MD deck cannot read the disc information properly.

c Replace the MD.

Erase all the recorded contents of the MD using All Erase Function (see page 35).

C41/Cannot Copy

The sound source is a copy of a commercially available music software, or you tried to record a CD-R (Recordable CD) or CD-RW (ReWritable CD).

c The Serial Copy Management System prevents

making a digital copy (see page 57). You cannot record a CD-R or CD-RW.

C71/Check OPT-IN

This appears momentarily because of the signal of the digital broadcast during recording.

c There is no affect on the recorded contents. No component is connected to the DIGITAL

OPTICAL IN jack, or a digital component is not connected properly.

c Connect a digital component to the DIGITAL

OPTICAL IN jack properly using a digital

connecting cable (not supplied, see page 49). The connected digital component is not turned on. c See the operating instructions supplied with the

connected component and confirm whether the

component is turned on. The digital connecting cable connected to the

DIGITAL OPTICAL IN jack is pulled out, or the connected digital component is turned off during digital recording.

c Connect the cable, or turn on the digital

component.

E0001/MEMORY NG

There is an error in the internal data that the system needs in order to operate.

c Consult your nearest Sony dealer.

E0101/LASER NG

There is a problem with the optical pickup. c The optical pickup may have failed. Consult your

nearest Sony dealer.

TABLE OF CONTENTS

SELF-DIAGNOSIS FUNCTION..................................... 2

1. SERVICING NOTES............................................... 4

2. GENERAL ................................................................... 7

3. DISASSEMBLY ......................................................... 9

4. TEST MODE ............................................................... 24

5. ELECTRICAL ADJUSTMENTS

CD Section ...................................................................... 33

MD Section ..................................................................... 34

6. DIAGRAMS

6-1. Note For Printed Wiring Boards and

Schematic Diagrams ....................................................... 45

– Wave forms................................................................... 45

– Circuit Boards Location............................................... 45

6-2. Block Diagram – CD Servo Section –............................ 46

6-3. Block Diagram – MD Servo Section –........................... 47

6-4. Block Diagram – Main Section – ................................... 48

6-5. Block Diagram – USB section –..................................... 49

6-6. Printed Wiring Boards – BD (CD) Board – ................... 50

6-7. Schematic Diagram – BD (CD) Board –........................ 51

6-8. Printed Wiring Boards – Connector Section – .............. 52

6-9. Schematic Diagram – Connector Section –.................... 53

6-10. Printed Wiring Board – BD (MD) Board – .................... 54

6-11. Schematic Diagram – BD (MD) Board (1/2) – .............. 55

6-12. Schematic Diagram – BD (MD) Board (2/2) – .............. 56

6-13. Pr inted Wiring Board – MD DIGITAL Board – ............ 57

6-14. Schema tic Diagram – MD DIGITAL Board (1/3) – ...... 58

6-15. Schema tic Diagram – MD DIGITAL Board (2/3) – ...... 59

6-16. Schema tic Diagram – MD DIGITAL Board (3/3) – ...... 60

6-17. Printed Wiring Board – UCOM Board – ........................ 61

6-18. Schematic Diagram – UCOM Board – ........................... 62

6-19. Printed Wiring Boards – Audio Section – ...................... 63

6-20. Schema tic Diagram – Audio Section –........................... 64

6-21. Printed Wiring Board – PANEL Board – ....................... 65

6-22. Schema tic Diagram – PANEL Board – .......................... 66

6-23. Printed Wiring Boards – Power Section –...................... 67

6-24. Schema tic Diagram – Power Section – .......................... 68

6-25. IC Block Diagrams ......................................................... 69

6-26. IC Pin Function Description ........................................... 74

HCD-C7NT

7. EXPLODED VIEWS................................................ 82

8. ELECTRICAL PARTS LIST ............................... 92

HCD-C7NT

SECTION 1

SERVICING NOTE

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

FOR CD

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

FOR MD

NOTES ON LASER DIODE EMISSION CHECK

Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

CAUTION

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions.

ADVARSEL!

Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.

Udskiftning må kun ske med batteri

af samme fabrikat og type.

Levér det brugte batteri tilbage til leverandøren.

ADVARSEL

Eksplosjonsfare ved feilaktig skifte av batteri.

Benytt samme batteritype eller en tilsvarende type

anbefalt av apparatfabrikanten.

Brukte batterier kasseres i henhold til fabrikantens

instruksjoner.

VARNING

Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en likvärdig typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt gällande föreskrifter.

VAROITUS

Paristo voi räjähtää, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the bottom exterior.

This caution label is located inside the unit.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Notes on chip component replacement

•Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

•Keep the temperature of soldering iron around 270˚C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

SERVICE POSITION OF THE CD MECHANISM DECK

)

HCD-C7NT

CD MECHANISM DECK (TN-CCD1001Z)

UCOM BOARD

CN204

SERVICE POSITION OF THE MD MECHANISM DECK

BD (CD) BOAR

CN101

STAND

UCOM BOARD

CN203

BD (CD) BOARD

CN101

CN201

CN1005

PANEL BOARD AUDIO BOARD

CN1004

CN601

CN103

CN102

BD (MD) BOARD

CN204

CN222

CN102

CN1002

CN1003

MD DIGITAL BOARD

CN1001

MD MECHANISM (MDM-7X2B

HCD-C7NT

JIG FOR CHECKING BD (MD) BOARD WAVEFORM

The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) board. The names of ter minals and the checking items to be performed are shown as follows.

I+3V : For measuring Iop (Check the deterioration of the optical pick-up laser) Iop : For measuring Iop (Check the deterioration of the optical pick-up laser) GND : Ground TE : Tracking error signal (Traverse adjustment) FE : Focus error signal VC : Reference level for checking the signal RF : RF signal (Check jitter)

I+3V

GND

Iop

I+3V

Iop

GND

FE VC RF

CN105

I+3V Iop GND TE FE VC RF

for MDM-7X2

Main unit

SECTION 2

GENERAL

1 2

HCD-C7NT

This section is extracted from instruction manual.

CD SYNC HIGH 8 (19, 60) CD SYNC NORMAL 9 (19) CD Z 2 (10, 60) FUNCTION qs (9, 11, 13, 14, 16,

17, 19, 21–24, 26, 30–43, 50,

52)

MD Z 6 (15, 19, 29, 53) NET MD 7 (53) REC/REC IT 9 (20, 21, 25, 26,

28, 50, 60) Remote sensor 0 TUNING +/– 5 (42) VOL +/– qa (46)

79 8

BUTTON DESCRIPTIONS

? 1/ (power) 1 (7, 19, 29, 43, 46,

48, 53)

u 3 (9–11, 14–16, 19–21, 26,

28, 51)

x 4 (10, 11, 15, 16, 20–22, 26,

28, 51)

.> 5 (10, 11, 13, 15–17,

22–26, 30–41, 46–48)

m M 5 (10, 15, 36)

3 4

HCD-C7NT

Remote control

1 243

CD x qh (10, 11) CD X ws (10) CD N wd (9, 11, 21) CLEAR 9 (11, 13, 16, 30, 44) CLOCK/TIMER SELECT 6

(47, 48)

CLOCK/TIMER SET 7 (8, 46,

47) CURSOR T/t wh (8, 13, 30) DBFB qf (45) DISPLAY wk (8, 12, 17, 44) ENTER/YES 8 (8, 11, 13, 14,

16, 21–26, 29–42, 44, 46, 47) FM MODE qj (43) FUNCTION w; (9, 11, 13, 14, 16,

17, 19, 21–24, 26, 30–43, 50,

52)

GROUP ON/OFF wf (17, 27, 28,

30–34) GROUP SKIP qs (17, 28, 31–33) Letter/Number buttons wj (10,

13, 15, 30, 43)

wh wg wf wd

ws wa

qjqhqlqk

MD x qh (15, 16, 20–22, 26, 28,

51)

MD X ws (15, 26) MD N wg (14, 16, 17, 19, 20) MENU/NO q;3 (13, 14, 22–26,

29, 31–42)

NAME EDIT/SELECT (13,

29–31, 44)

PLAY MODE qk (9, 11, 13, 14,

16, 29, 40, 41) PRESET EQ qg (45) REPEAT qj (10, 15) SCROLL 5 (12, 14, 18, 31) SLEEP 1 (45) TIME 2 (8, 11, 12, 16, 17) TUNER BAND wa (42, 43) TUNING MODE qk (42, 43) TUNING +/– ql (42, 43) VOL +/– qd (46)

5 6 7 8

9 0

qa qs

qf qg

BUTTON DESCRIPTIONS

? 1/ (power) 4 (7, 19, 29, 43, 46,

48, 53)

. > qa (8, 10, 11, 13–17,

22–26, 30–41, 46–48)

–/+ qa (8, 46, 48) m M wh (10, 15, 36, 38)

Setting the time

Turn on the system.

Press CLOCK/TIMER SET on the remote.

If you are setting the clock for the first time, go to step 5.

Press – or + (. or >) on the remote repeatedly until “CLOCK SET?” appears in the display.

Press ENTER/YES on the remote.

The day indication flashes.

Press – or + (. or >) on the remote repeatedly to set the day, and then press ENTER/YES or CURSORt on the remote.

The hour indication flashes.

Press – or + (. or >) on the remote to set the hour, and then press ENTER/YES or CURSORt on the remote.

The minute indication flashes.

Press – or + (. or >) on the remote repeatedly to set the minute, and then press ENTER/YES on the remote.

If you made a mistake

Press TCURSOR or CURSORt on the remote until the indication you wish to change (day, hour, minute) flashes, and then change the setting.

To reset the time

Start over from step 1.

•This set can be disassembled in the order shown below.

BOTTOM PLATE, CASE

(Page 10)

JACK BOARD, HP BOARD,

REAR COVER

(Page 18)

OVER WRITE HEAD (HR901)

(Page 23)

SET

LOADING MOTOR (M703),

SPINDLE MOTOR (M701),

SLED MOTOR (M702)

(Page 22)

PANEL BOARD

(Page 10)

UCOM BOARD,

AMP POWER BOARD

(Page 19)

AUDIO BOARD,

POWER BOARD,

POWER TRANSFORMER

(T900) (1)

(Page 20)

CD MECHANISM DECK

(TN-CCD1001Z), BD (CD) BOARD

(Page 11)

AUDIO BOARD,

POWER BOARD,

POWER TRANSFORMER

(T900) (2)

(Page 20)

MD MECHANISM DECK

(MDM-7X2B),

MD DIGITAL BOARD

(Page 21)

CONNECTOR BOARD

(Page 12)

FEED MOTOR ASSY (M903)

(Page 15)

REAR DAMPER BRACKET

(Page 15)

SW BOARD

(Page 14)

FRONT BRACKET SECTION,

LOADING MOTOR ASSY

(M902)

(Page 13)

SPINDLE MOTOR ASSY

(M904)

(Page 18)

BASE SECTION

(Page 17)

OPTICAL PICK-UP (OPTIMA-720L1E),

SCREW GUIDE,

FEED SCREW ASSY, etc.

(Page 16)

OPTICAL PICK-UP

(OPTIMA-720L1E)

(Page 16)

HOLDER ASSY

(Page 21)

OPTICAL PICK-UP

(KMS-262E)

(Page 23)

BD (MD) BOARD

(Page 22)

TUNER PACK,

D. C. FAN (M901)

(Page 19)

•The dotted square with arrow ( →) prompts you to move to the next job when all of the works within the dotted square ( ) are

completed.

HCD-C7NT

SECTION 3

DISASSEMBLY

HCD-C7NT

Note: Follow the disassembly procedure in the numerical order given.

3-1. Bottom Plate, Case

case

claw

screw

(+BVTT 3 x 5)

bottom plate

three screws

3-2. Panel Board

front panel section

screw (+K 3 x 6)

two claws

four screws

(+BVTT 3 x 5)

PANEL board

wire (flat type)

(16 core) (CN201)

screw

(+K 3 x 6)

six screws

(+B 2 x 6)

two screws

(+BVTT 3 x 5)

3-3. CD Mechanism Deck (TN-CCD1001Z), BD (CD) Board

)

CN1

CD mechanism deck

(TN-CCD1001Z)

board to board connector

two screws

(+BVTT 2.6 x 5)

CN103

cushion (A)

screw

(+BVTT 2 x 5)

bracket (CD), foot (felt

BD (CD) board

HCD-C7NT

four screws

(+BVTT 3 x 5)

two screws

(+BVTT 3 x 5)

screw

(+BVTT 3 x 5)

wire (flat type) (29 core)

(CN204)

screw

(+BVTT 3 x 5)

two screws

(+BVTT 3 x 5)

HCD-C7NT

3-4. CONNECTOR Board

Remove solderings

starting from the left LOADING (+), (–), red and black.

Remove solderings starting from

the top left SPINDLE (+), (–), FD MOTOR (+), (–) and the LIMIT switch that has no polarity.

Remove solderings starting from the left

green, yellow, orange, red and brown.

Remove the soldering.

screw

(+P 2 x 2.5)

wire clamper

fpc holder

CONNECTOR boar

3-5. Front Bracket Section, Loading Motor Assy (M902)

fpc holder

screw

(M 2 x 2.5)

screw

(+P 2 x 3.0)

wire clamper

Move down the gear mount bracket in the direction of the arrow

screw

(+P 2 x 3)

screw

(M 2 x 4)

Remove it in the direction of

the arrow

from the left side when viewed from the rear of the front bracket.

Remove the two

hang-up springs (FZ).

three claws

loading belt

Raise the

CONNECTOR board.

Note during re-assembling

When re-assembling, align the positions as shown.

front backet section

chassis section

Remove two solderings.

loading motor assy (M902)

HCD-C7NT

3-6. SW Board

Release it from

the detents.

SW board

eleven claws

(BRN) (RED) (ORG) (YEL) (GRN)

Remove five solderings.

switch (S3)

(Disc Existence, Chucking, Releasing detect)

Remove two solderings.

SW board

Remove two solderings.

switch (S2) (12cm Disc/12cm Disc Eject End detect)

switch (S1)

(Disc IN/8cm Disc detect)

switch (S4)

(8cm Disc Eject End detect)

Remove two solderings.

3-7. Feed Motor Assy (M903)

white

two screws

(+P 2 x 10)

Remove two

solderings.

red

pulley gear

screw

(+P 2 x 3.0)

feed motor assy

(M903)

FD gear bracket

HCD-C7NT

3-8. Rear Damper Bracket

screw

(+P 2 x 2.5)

screw

(+P 2 x 3)

wire clamper

two screws

(+P 2 x 3)

rear damper bracke

HCD-C7NT

3-9. Optical Pick-up (OPTIMA-720L1E), Screw Guide, Feed Screw Assy, etc.

screw

(+P 2 x 10)

optical pick-up (OPTIMA-720L1E), screw guide, feed screw assy, etc.

two screws

(+P 2 x 10)

pick-up flexible board

Slant the CONNECTOR board

in the direction of the arrow

feed motor assy (M903),

FD gear bracket, etc.

3-10. Optical Pick-up (OPTIMA-720L1E)

pulley M

screw guide

detent spring

optical pick-up

(OPTIMA-720L1E)

screw

(+P 1.7 x 6)

feed screw assy

pulley guide spring

screw

(+P 1.4 x 2)

3-11. Base Section

pick-up flexible

board

two screws

(+P2 x 5)

Remove solderings from

the damper pins.

springs (FZ) as shown.

Remove the two hang-up

Move the holder (L) in the

direction of the arrow A.

Remove the two damper

pins toward inside.

HCD-C7NT

Remove the two hang-up

springs (R) as shown.

base section (0 Remove the base block while the mechanism is in the Loading IN state.)

Slant the base block in the direction of the arrow B and remove the base block from the main unit in a manner that the lock pin passes through the groove of the holder (L) as shown.

Remove solderings.

holder (L)

lock pin

HCD-C7NT

3-12. Spindle Motor Assy (M904)

open to direction of the arrow

clip arm spring (L)

clip arm spring

two screws

(+P 1.7 x 2.2)

turn table

washer

spindle motor assy

(M904)

3-13. Jack Board, HP Board, Rear Cover

screw

(+BVTT 3 x 5)

four screws

(+BV 3 x 12)

three screws

(+BV 3 x 8)

connector

(CN109)

two nuts

(N4)

spindle motor

connector

(CN110)

screw

(+PTPWH 3 x 8)

connector

(CN107)

HP board

rear cover

JACK board

two screws

(+BV 3 x 8)

two screw

(+B 4 x 16)

D.C.fan

(M901)

Note for re-installation-1

When installing the rear cover, be careful that the three harnesses coming from

Connector (CN107)”,

“

Connector (CN109)”,

“

Connector (CN110)”,

“ and the harness coming from the DC fan (M901) must not contact the heat sink (IC902) and the diode (D981) and the heat sink (IC904).

POWER board

heat sink (IC902)

diode (D981)

Note for re-installation-2

When installing the rear cover, be careful that the three harnesses coming from

Connector (CN107)”,

“

Connector (CN109)”,

“

Connector (CN110)”,

“ and the harness coming from the D.C. fan (M901) must not be pinched by the rear cover, the UCOM board, power transformer (T900) and tuner pack.

3-14. Tuner Pack, D. C. Fan (M901)

Note for re-installation

When installing the tuner pack, insert the three harnesses connected to CN105 and connected to CN106 and connected to CN108 of the AUDIO board, in between the flat cable (11 core or 15 core) and the tuner pack in the direction of the arrow so that the flat cable (11 core or 15 core) must be inserted.

CN108

D.C.fan (M901)

CN105

CN106

wire (flat type)

(11 core or 15 core)

(CN105)

HCD-C7NT

connector

D.C. fan

(M901)

screw

(+BV 3 x 8)

wire (flat type)

AUDIO board

(11 core or 15 core)

tuner pack

3-15. UCOM Board, AMP POWER Board

AMP POWER baord

CN852

Note for re-installation (routing the harnesses)

Be careful that the two harnesses between CN995 and CN992 of the power transformer (T900) and the POWER board must not contact the heat sink (IC902) on the POWER board and the flat cable (19 core) that is inserted to CN203 on the UCOM board.

heat sink (IC902)

CN995

POWER baord

wire (flat type) (19 core)

CN203

AMP POWER board

tuner pack (After slanted toward outside, remove it straight up toward outside.)

board to board

connector

wire (flat type)

(19 core) (CN203)

CN206

CN901

connector

(CN851)

wire (flat type)

(19 core) (CN101)

CN205

board to board

connector

(+BVTT 3 x 5)

wire (flat type)

(16 core) (CN201)

UCOM board

two screws

UCOM board

CN851

CN992 power transformer (T900)

HCD-C7NT

3-16. AUDIO Board, POWER Board, Power Transformer (T900) (1)

AUDIO board, POWER boad,

power transformer (T900 ), etc.

two screws

(+BVTT 3 x 5)

connector

(CN102)

two screws

(+BVTT 3 x 5)

3-17. AUDIO Board, POWER Board, Power Transformer (T900) (2)

connector (CN105)

AUDIO board

D.C.fan (M901)

board to board

connector

nylon rivet (DIA 3.5)

POWER board

screw

(+BV 3 x 8)

four screws

(+BVTT 3 x 5)

insulated plates (POWER)

insulated plates (POWER) 2

connector (CN992)

clamp

connector (CN995)

CN103

wire (flat type) (11 core)

(from tuner pack)

CN902

tuner pack

connector (CN991)

power cord

power transforme

(T900)

3-18. MD Mechanism Deck (MDM-7X2B), MD DIGITAL Board

two screws

(+BVTT 3 x 5)

shield (MD2)

two screws

(+BVTT 3 x 5)

Slant the shield (MD1), shield (MD2) and the MD DIGITAL board in the direction of the arrow and remove the two screws (+BVTT 3 x 5).

MD DIGITAL board

four screws

(+BVTT 3 x 5)

shield (MD1)

four insulators

HCD-C7NT

four screws, step

wire (flat type)

(17 core) (CN703)

3-19. Holder Assy

screw

(+BTN 1.7 x 3)

tension spring (holder)

ground wire

holder assy

wire (flat type)

(27 core) (CN702)

MD mechanism deck

(MDM-7X2B)

hoo

HCD-C7NT

)

3-20. BD (MD) Board

Remove two solderings.

(spindle)

Remove two solderings.

(sled)

M702

M701

(CN101)

two screws

(+BP TRI 2 x 6 CZN)

flexible board

BD (MD) board

connector (CN104)

Remove two solderings. (loading)

3-21. Loading Motor (M703), Spindle Motor (M701), Sled Motor (M702)

torsion spring (spindle)

M703

S102

Remove three solderings.

lever (head)

belt (loading)

two screws

(+PWH 1.7 x 3.5)

loading motor (M703)

(+PWH 1.7 x 3.5)

spindle motor (M701)

three tapping screws (M1.7)

two screws

sled motor (M702

3-22. Over Write Head (HR901)

)

over write head

(HR901)

screw (+P 1.7 x 6)

HCD-C7NT

3-23. Optical Pick-Up (KMS-262E)

main shaft

flexible board

screw

(+BP TRI 2 x 6 CZN)

base (BU-D)

optical pick-up (KMS-262E)

screw

(+BP TRI 2 x 6 CZN

base (BU-A)

screw (+KTP 2 x 6)

HCD-C7NT

SECTION 4

TEST MODE

[Factory Preset Mode]

∗ This mode clears all data including preset data stored in the

RAM to initial conditions. Excute this mode when returning the set to the customer.

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press the FUNCTION z button to set the CD function.

(except the TUNER function)

3. Press three buttons VOL + , CD Z and MD Z

simultaneously.

4. The message “COLD RESET” blinks and the present contents are reset to the default values.

[Version and Destination Display Mode]

∗ The version or destination is displayed.

Procedure:

1. Press the ?/1 button to turn the power on.

2. To enter the test mode, press the three buttons VOL + , x and MD Z simultaneously.

3. The model and destination are displayed.

4. Press the REC/REC IT/NORMAL and u buttons simultaneously.

5. The version is displayed as “STR/CD V . ”.

6. Press the REC/REC IT/NORMAL and u buttons simultaneously.

7. The version is displayed as “MD V . ”.

8. Press the REC/REC IT/NORMAL and u buttons simultaneously, then the mode returns to step 3.

9. To exit from this mode, press the ?/1 button to turn the power off.

[FL T ube Test Mode]

∗ All fluorecent segments and LEDs are tested.

Procedure:

1. Press the ?/1 button to turn the power on.

2. To enter the test mode, press three buttons VOL + , x and ./m TUNING - simultaneously.

3. All segments and LEDs are turned on.

4. Press the REC/REC IT/NORMAL and u buttons simultaneously.

5. All segments are turned off (All LEDs still lit).

6. Press the REC/REC IT/NORMAL and u buttons simultaneously.

7. Almost half segments are turned on. (PATTERN 1)

8. Press the REC/REC IT/NORMAL and u buttons simultaneously.

9. The segments which are turned on in step 7 are turned off, then remaining segments are turned on. (PATTERN 2)

[Key T est Mode]

∗ Keyboard check.

Procedure:

1. Press the ?/1 button to turn the power on.

2. To enter the test mode, press three buttons VOL + , x and >/M TUNING + simultaneously.

3. In the key test mode, the fluorecent indicator displays “KEY00”.

4. Each time a button is pressed, “KEY ” value increases. However, once a button is pressed, it is no longer taken into account.

5. To exit from this mode, press three buttons simultaneously as step 2 , or disconnect the power cord.

[Amp Test Mode]

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press three buttons VOL - , CD Z and MD Z simulta- neously.

3. Press two buttons REC/REC IT/NORMAL and x simultaneously.

4. The message “7 [TESTMIN]” is displayed for a few seconds.

5. Press two buttons REC/REC IT/NORMAL and x simultaneously again.

6. Each time two buttons are depressed, the display changes as “8 [TESTMID]” , “9 [TESTMAX]”, and “10 [TESTSUR]” .

7. Press the VOL + button, the display changes “V OLUME 21” to “VOLUME MAX”.

8. Press the VOL - button, the display changes “VOLUME 21” to “VOLUME MIN”.

9. To exit from this mode, press the ?/1 button to turn the power off and cold reset is executed.

[CD Test Mode]

∗ The CD system versions are displayed.

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press the FUNCTION z button to set the CD function.

3. Press three buttons of VOL + , x and CD SYNC HIGH simultaneusly.

4. The message “dut CD VER” is displayed.

5. Press the CD Z button and the version “CD played.

6. Press the >/M TUNING + button and “CDSYS ” is displayed.

7. Each time the >/M TUNING + button is depressed , the display changes as “CDMA S”, “CDBDU”, “CDBDL”, “CDMU”, “CDML”.

8. By depressing the ./m TUNING - button the ver sions are displayed in reverse.

9. To exit this mode, press the ?/1 button to turn the po wer off.

. ” is dis-

GROUP

10. Press the REC/REC IT/NORMAL and u buttons simul-

taneously, the mode returms to step 3 and all segments are turned on.

11. To exit from this mode, press the ?/1 button to turn the power off.

DISC GROUP

L-SYNC SHUF

HCD-C7NT

[CD Aging Mode]

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press the FUNCTION z button to set the CD function, and

insert a disc.

3. Press three buttons of VOL - , CD Z and >/M TUNING + simultaneusly.

4. The message “Eject” is displayed, a disc is ejected and inserted again automatically.

5. The sequence during the CD aging mode is following as below.

CD aging mode sequence:

CD disc eject

CD disc in

TOC reading Playback the first track Playback the last track

Display the number of aging

6. To exit this mode , press the ?/1 button to turn the power off.

[CD/MD Aging Mode]

∗ Aging of CD and MD is performed at the same time.

Procedure:

1. Press the ?/1 button to turn the power on.

2. Press the FUNCTION z button to set the CD function.

3. Insert a disc (CD) and a recordable disc (MD).

4. Press three buttons of VOL + , u and MD Z simultaneusly.

5. The message “Eject” is displayed and aging started.

6. The sequence of CD aging is same as the CD aging mode, however the MD aging is r epetition of changing the track after a few seconds recording.

7. The number of aging is displayed in hexadecimal. For example, AGING00000011 means the 17th rouine of aging.

8. To exit this mode, press the ?/1 button to turn the po wer off, or press three buttons of VOL + , CD Z and MD Z simul- taneously and cold reset is executed.

MD SECTION

Note 1:About “R”

As this unit has only a few buttons, some operations require the use of remote commander buttons. These operations are indicated as “R” in this manual. Example: MENU/NO “R” ...Press the MENU/NO button of the remote commander.

Note 2:Incorrect operations may be performed if the MD test mode

is not entered properly. In this case, press the ?/1 button to turn the power off, and retry to enter the MD test mode.

1. PRECAUTIONS FOR USE OF TEST MODE

• As operations related to loading will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the MD Z button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating. Therefore, it will be ejected while rotating. Be sure to press the MD Z button after pressing the MENU/NO “R” button and the rotation of disc is stopped.

1-1. Recording laser emission mode and operating

buttons

• Continuous recording mode (CREC 2MODE)

• Laser power check mode (LDPWR CHECK)

• Laser power adjustment mode (LDPWR ADJUST)

• Comparison with initial Iop value written in nonvolatile memory (Iop Compare)

•Write current Iop value in read nonvolatile memory using microprocessor (Iop NV Save)

•Traverse (MO) check (EF MO CHECK)

•Traverse (MO) adjustment (EF MO ADJUST)

•When pressing the REC/REC IT button.

2. SETTING THE TEST MODE

The following is the method of entering the test mode. Procedure: 1. Press the ?/1 button to turn the power on.

2. Press the FUNCTION z button to set the MD

function.

3. Press three buttons of VOL - , x , and CD SYNC HIGH (MD) simultaneously. When the test mode is set, “[Check]” will be displayed. Pressing the . “R” or > “R” button between the following three groups; ··· Tt [Check] Tt [Service] Tt [Develop] Tt ···.

Note: Do not use the test mode in the [Develop] group.

If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the MENU/NO “R” button immediately to exit the [Develop] group.

3. RELEASING THE TEST MODE

Procedure 1: Press the REPEAT “R” button to display “Initial-

ize”, then release the MD test mode.

Procedure 2: Press two button of VOL - and MD Z to display

“Intialize”, then release the MD test mode.

HCD-C7NT

4. BASIC OPERATIONS OF THE TEST MODE

All operations are performed using the . “R” , > “R” , ENTER/YES “R” and MENU/NO “R” . The functions of these buttons are as follows.

Function name Function

. “R” , > “R” buttons Changes parameters and modes

ENTER/YES “R” button Proceeds onto the next step. Finalizes input MENU/NO “R” button Returns to previous step. Stops operations

5. SELECTING THE TEST MODE

There are 26 types of test modes as shown below. The groups can be switched by pressing the . “R” or > “R” button. After selecting the group to be used, press the ENTER/YES “R” button. After setting a certain group, pressing the . “R” or > “R” b utton switches modes shown below . Refer to “Group” in the table for details can be selected. All items used for servicing can be treated using group [Service]. So be carefully not to enter other groups by mistake.

Note: Do not use the test mode in the [Develop] group.

If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the MENU/NO “R” button immediately to exit the [Develop] group.

Display

AUTO CHECK Err Display TEMP ADJUST LDPWR ADJUST Iop Write Iop NV Save EF MO ADJUST EF CD ADJUST FBIAS ADJUST AG Set (MO) AG Set (CD) TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK ScurveCHECK VERIFYMODE DETRK CHECK 0920 CHECK Iop Read Iop Compare ADJ CLEAR INFORMATION CPLAY2MODE CREC 2MODE

No.

Automatic self-diagnosis

C01

Error history display, clear

C02

Temperature compensation offset adjustment

C03

Laser power adjustment

C04

Iop data writing

C05

Writes current Iop value in read nonv olatile memory using microprocessor

C06

Traverse (MO) adjustment

C07

Traverse (CD) adjustment

C08

Focus bias adjustment

C09

Auto gain output level adjustment (MO)

C10

Auto gain output level adjustment (CD)

C11

Temperature compensation offset check

C12

Laser power check

C13

Traverse (MO) check

C14

Traverse (CD) check

C15

Focus bias check

C16

S-curve check

C17

Nonvolatile memory check

C18

Detrack check

C19

Most circumference check

C25

Iop data display

C26

Comparison with initial Iop value written in nonvolatile memory

C27

Initialization of nonvolatile memory for adjustment values

C28

Display of microprocessor version, etc.

C31

Continuous playback mode

C36

Continuous recording mode

C37

Details

Mark

Group

Check Service

•For details of each adjustment mode, refer to “5. Electrical Adjustments”.

• If a different mode has been selected by mistake, press the MENU/NO “R” button to release that mode.

• Modes with (×) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the MENU/NO “R” button to release the mode immediately.

HCD-C7NT

“CREC 2MID” t “CREC 2OUT” t “CREC 2IN”

5-1. Operating the Continuous Playback Mode

1. Entering the continuous playback mode

(1) Set the disc in the unit. (Whichever recordable discs or discs

for playback only are available)

(2) Press the . “R” or > “R” button to display

“CPLAY2MODE” (C36).

(3) Press the ENTER/YES “R” button to change the display

to “CPLAY2MID”.

(4) When access completes, the display changes to “C =

AD = )”.

Note: The numbers “ ” displayed sho w you error rates and ADER.

2. Changing the parts to be played back

(1) Press the ENTER/YES “R” button during continuous play-

back to change the display as below.

“CPLAY2MID” t “CPLAY2OUT” t “CPLAY2IN”

When pressed another time, the parts to be played back can be moved.

(2) When access completes, the display changes to “C =

AD = )”.

Note: The numbers “ ” displayed show you error rates and ADER.

3. Ending the continuous playback mode

(1) Press the MENU/NO “R” button. The display will change

to “CPLAY2MODE” (C36).

(2) Press the MD Z button and take out the disc.

Note: The playback start addresses for IN, MID, and OUT

are as follows. IN : 40h cluster MID : 300h cluster OUT : 700h cluster

5-2. Operating the Continuous Recording Mode (Use

only when performing self-recording/palyback check)

1. Entering the continuous recording mode

(1) Set a recordable disc in the unit. (2) Press the . “R” or > “R” button to display “CREC

2MODE” (C37).

(3) Press the ENTER/YES “R” button to change the display to

“CREC 2MID”.

(4) When access completes, the display changes to “CREC 2(

)” and “ REC ” is displayed.

Note: The numbers “ ” displa yed shows you the recording posi-

tion addresses.

REC

2. Changing the parts to be recorded

(1) When the ENTER/YES “R” button is pressed during con-

tinuous recording, the display changes as below.

When pressed another time, the parts to be recorded can be changed. “ REC ” goes off.

REC

(2) When access completes, the display changes to “CREC 2(

)” and “ REC ” is displayed.

Note: The numbers “ ” displayed shows you the recording posi-

tion addresses.

REC

3. Ending the continuous recording mode

(1) Press the MENU/NO “R” button. The display changes to

“CREC 2MODE” (C37) and “ REC ” goes off.

REC

(2) Press the MD Z button and take out the disc.

Note 1: The recording start addresses for IN, MID, and OUT are

as follows.

IN : 40h cluster MID : 300h cluster OUT : 700h cluster

Note 2: The MENU/NO “R” button can be used to stop recording

Note 3: Do not perform continuous recording for long periods of

Note 4: During continuous recording, be careful not to apply vi-

anytime.

time above 5 minutes.

bration.

HCD-C7NT

6. FUNCTIONS OF OTHER BUTTONS

Function

x M “R” m “R” x + >/M TUNING +

VOL - + CD Z MD Z REPEAT “R”

Sets continuous playback when this is pressed in the STOP state. When this is pressed during continuous playback, playback position moves.

Stops continuous playback and continuous recording The sled moves to the outer circumference only when this is pressed The sled moves to the inner circumference only when this is pressed Switches the spindle servo mode (CLV S y CLV A) Switches the displayed contents each time the button is pressed Ejects the disc Releases the test mode

7. AUTOMATIC SELF-DIAGNOSIS FUNCTION

This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform AUTO CHECK after the laser power check and Iop Compare.

Procedure:

1. Press the . “R” or > “R” button to display “AUTO CHECK” (C01).

2. Press the

performed. In this case, perform the laser power check and Iop Compare, and then repeat from enter the MD test mode.

3. If a disc is in the mechanical deck, it will be ejected forcibly.

“DISC IN” will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded.

4. If a disc is loaded at step 3, the check will start automatically.

5. When “XX CHECK” is displayed, the item corresponding to XX will be performed.

When “60 CHECK” completes, the disc loaded at step 3 will be ejected. “DISC IN” will be displayed. Load the check disc (TDYS-1).

6. When the disc is loaded in step 5, the check will automatically be resumed from “07 CHECK”.

7. After completing to test item 12 (“0C CHECK”), check OK or NG will be displayed. If all items are OK, “CHK ALL OK” will

be displayed. If any item is NG, it will be displayed as “NG:xxxx”.

ENTER/YES “R” button. If “LDPWR ” is displayed, it means that the laser power check has not been

Contents

When “CHK ALL OK” is displayed, it means that the optical pick-up is normal. Check the operations of other parts (spindle motor, sled motor, etc.). When displayed as “NG:xxxx”, it means that the optical pick-up is faulty. In this case, replace the optical pick-up.

8. INFORMATION

Display the software version.

Procedure:

1. Press the . “R” or > “R” button to display “INFORMATION” (C31).

2. Press the ENTER/YES “R” button.

3. The software version will be displayed.

4. Press the MENU/NO “R” button to end this mode.

HCD-C7NT

Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD (MD) BOARD) ARE REPLACED

The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory . By recording the v alue, it will eliminate the need to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD (MD) board), record the Iop value on the optical pick-up according to the following procedure.

Record Procedure:

1. Press the ?/1 button to turn the power on.

2. Press the FUNCTION z button to set the MD function.

3. Press three buttons of VOL - , x and CD SYNC HIGH ,

simultaneously to enter the MD test mode and display “[Check]”.

4. Press the . “R” or > “R” button to display

“[Service]”.

5. Press the ENTER/YES “R” button to display “AUTO CHECK”, and press the > “R” button to display “Iop Write”.

6. Press the ENTER/YES “R” button.

7. The display becomes “Ref= @@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.

8. Input the Iop value written on the optical pick-up. To select the number : Press the

. “R” or > “R” button.

To select the digit : Press two buttons of VOL - and

CD Z simultaneously.

9. When the ENTER/YES “R” button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).

10. As the adjustment results are recorded for the step 9 value. Leave it as it is and press the ENTER/YES “R” button.

11. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop Write”.

12. Press the REPEAT “R” button, or press two buttons of VOL - and MD Z simultaneously to complete. “Initialize” will be displayed and release the MD test mode.

WHEN MEMORY NG IS DISPLAYED

If the nonvolatile memory data is abnormal, “E001 MEMOR Y NG” will be displayed so that the MD deck does not continue operations. In this case, set the test mode promptly and perform the following procedure.

Procedure:

1. Enter the MD test mode.

2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be displayed “INIT EEP?”.

3. Press the x and MD Z buttons simultaneously.

4. Press the . “R” or > “R” button to display “MDM-7X2B”.

5. Press the FUNCTION z button. If the nonvolatile memory is successfully overwritten, the normal MD test mode will be set and a message to select the MD test mode will be displayed.

Display Precedure:

1. Press the ?/1 button to turn the power on.

2. Press the FUNCTION z button to set the MD function.

3. Press three buttons of VOL - , x , and CD SYNC HIGH

simultaneously to enter the MD test mode and display “[Check]”.

4. Press the . “R” or > “R” button to display “[Ser-

vice]”.

5. Press the ENTER/YES “R” button to display “AUTO CHECK”, and press the > “R” button to display “Iop Read”.

6. Press the ENTER/YES “R” button.

7. “@@.@/##.#” is displayed and the recorded contents are displayed. @@.@ : Indicates the Iop value labeled on the pick-up. ##.# : Indicates the Iop value after adjustment.

8. Press the REPEAT “R” button or press two buttons of VOL - and MD Z simultaneously to complete. “Initialize” will be displayed and release the MD test mode.

HCD-C7NT

CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS IN MD

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

Criteria for Determination

(Unsatisfactory if specified value is not satisfied)

Laser power check

(6-2 : See page 37)

Auto check

(6-4 : See page 38)

Temperature compensation offset check

(6-1 : See page 37)

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.

• 0.9 mW power Specified value : figure1

• 8.4 mW power Specified value : figure2

Iop (at 8.4mW)

• Labeled on the optical pick-up Iop value ± 10mA

• Unsatisfactory if displayed as “NG: XXXX” (X is an arbitrary number)

• Unsatisfactory if displayed as “T=@@ (##) [NG]” (@@, ## are both arbitrary numbers)

• Clean the optical pick-up

• Adjust again

• Replace the optical pick-up

• Check for disconnection of the circuits around D101 (BD (MD) board)

• Check the signals around IC101, IC151, CN102, CN103 (BD (MD) board)

Measure if unsatisfactory

Figure1:

SPECIFIED VALUE

KMS-262A KMS-262E

0.84 to 0.92 mW

0.90 to 0.96 mW

Figure2:

SPECIFIED VALUE

KMS-262A KMS-262E

8.1 to 8.7 mW

8.4 to 8.9 mW

RETRY CAUSE DISPLAY MODE IN MD

• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the “track mode” for obtaining track information will be set. This is useful for locating the faulty part of the unit.

•The following will be displayed. During recording and stop : Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright. These are displayed in hexadecimal.

Precedure:

1. Load a recordable disc whose contents can be erased into the unit.

2. Press the MENU/NO “R” button. When “Edit Menu” is displayed on the fluorescent indicator tube, p ress the

. “R” or > “R” button to display “All Erase?”.

3. Press the ENTER/YES “R” button.

4. When “All Erase??” is displayed on the fluorescent indicator tube.

5. Press the ENTER/YES “R” button to display “Complete!”.

6. Press the REC/REC IT button to start recording. Then press the u button and start recording. If recording cannot be performed,

press the FUNCTION z button and set a different function.

7. Press three buttons of VOL - , u and CD SYNC HIGH simultaneously to enter the retry cause display mode.

8. To check the “track mode”, press the u button to start playback.

9. To release this mode, press the ?/1 button to turn the power off. When “TOC” goes off , disconnect the power plug from the

outlet. If the test mode cannot be released, refer to “Factory Preset” on page 24.

+ 76 hidden pages