Yamaha CDX-396, CDX-496 Service manual

CDX-396/496

COMPACT DISC PLAYER

CDX-396/496

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherant to the industry, and more specifically YAMAHA Products, are already known and understood by the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have accumu- IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.

■

CONTENTS

TO SERVICE PERSONNEL ....................................... 1-2

FRONT PANELS ............................................................ 3

REAR PANELS .............................................................. 4

SPECIFICATIONS .......................................................... 5

INTERNAL VIEW ........................................................... 5

DISASSEMBLY PROCEDURES ............................... 6, 7

STANDARD OPERATION CHART ........................... 7, 8

TEST MODE ............................................................... 8, 9

ERROR MESSAGE................................................ 10, 11

injury, destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that all service required should be performed by an authorized YAMAHA Retailer or the appointed service representative.

recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.

lated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).

IMPORTANT NOTICE

CDX-396/496

DISPLAY DATA ........................................................... 12

IC DATA .................................................................. 13-16

BLOCK DIAGRAM ....................................................... 17

PRINTED CIRCUIT BOARD ................................... 18-21

IC BLOCK .................................................................... 22

WAVEFORMS .............................................................. 23

SCHEMATIC DIAGRAM .............................................. 24

PARTS LIST ............................................................ 25-37

REMOTE CONTROL TRANSMITTER......................... 38

100707

CDX-396/496

■

TO SERVICE PERSONNEL

1. Critical Components Information. Components having special characteristics are marked

and must be replaced with parts having specifications equal to those originally installed.

2. Leakage Current Measurement (For 120V Models Only). When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits.

● Meter impedance should be equivalent to 1500 ohm shunted

by 0.15µF.

● Leakage current must not exceed 0.5mA.

● Be sure to test for leakage with the AC plug in both

polarities.

CAUTION: USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE

SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

THE COMPACT DISC PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLY QUALIFIED SERVICE PERSONNEL.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser. Therefore, be sure to carefully follow the instructions below when servicing .

1. Laser Diode Properties

● Material : GaAlAs

● Wavelength : 780 nm

● Emission Duration : Continuous

● Laser Output : max. 44.6 µW*

* This output is the value measured at a distance of

WARNING: CHEMICAL CONTENT NOTICE!

CDX-396/496

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSOEVER!

2. When checking the laser diode emission, keep your eyes more than 30 cm away from the objective lens.

about 200 mm from the objective lens surface on the Optical Pick-up Block.

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.

➀ G, B models

CLASS 1 LASER PRODUCT

➁ R, G, B model

CDX-396/496

English

➀

THIS PRINTING (SEE POSITION SHOWN IN THE ILLUSTRATION) INFORMS THE USER THAT THE APPARATUS CONTAINS A LASER COMPONENT.

➁ THIS LABEL (SEE POSITION SHOWN IN THE ILLUSTRATION) WARNS THAT ANY FURTHER PROCEDURE WILL

BRING THE USER INTO EXPOSURE WITH THE LASER BEAM. CAUTION : USE OF CONTROLS, ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE

SPECIFIED HEREIN, MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Swedish

DENNA MÄRKNING (SE FIGUR) UPPLYSER OM ATT DET I APPARATEN INGÅR EN LASERKOMPONENT AV TYP

➀

KLASS 1.

➁ VARNINGSMÄRKNING (SE FIGUR) FÖR STRÅLNING. INGREPP I APPARATEN BÖR ENDAST FÖRETAGAS AV

FACKMAN MED KÅNNEDOM OM LASER. APPARATEN INNEHÄLLER EN LASERKOMPONENT SOM AVGER STRÅLNING ÖVERSTIGANDE GRÄNSEN FÖR LASERKLASS 1.

VARNING : OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD: BETRAKTA EJ STRÅLEN.

Danish

DETTE MÆRKAT ER ANBRAGT SOM VIST I ILLUSTRATIONEN FOR AT ADVARE BRUGEREN OM AT APPARATET

➀

INDEHOLDER EN LASERKOMPONENT.

➁ DETTE MÆRKAT OM LASEREN ER ANBRAGT PÅ APPARATET SOM EN OPLYSNING OM AT APPARATET

INDEHOLDER ET LASERKOMPONENT. ADVARSEL : INDGREB BOR KUN FORETAGES AF EN FAGMAND DA DER ER RISIKO FOR RADIOAKTIV

STRÅLING.

ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING.

UNDGÅ UDSAETTELSE FOR STRÅLING.

CDX-396/496

Finnish

VARO! : AVATTAESSA OLET ALTTIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

CDX-396/496

■

FRONT PANELS

CDX-396

CDX-496

CDX-396

CDX-396/496

CDX-496

OUTPUT LEVEL

■

240V

120V

110V

REAR PANELS

U, C models

R model

CDX-396/496

A model

G, B models

120V

220V

110

240V

CDX-396/496

■

SPECIFICATIONS

Output Level

1kHz, 0dB 2.0 ± 0.5Vrms

Signal to Noise Ratio (EIAJ) 105dB Dynamic Range 95dB Harmonic Distortion+Noise (1kHz) 0.003% Frequency Response

2Hz — 20kHz ±0.5dB

Power Requirements

U, C models (CDX-396 ONLY) 120V AC 60Hz B, G models 230V AC 50Hz A model (CDX-396 ONLY) 240V AC 50Hz R model 110/120/220/240V AC 50/60Hz

Power Consumption 9W Dimensions (W x H x D) 435 x 96 x 277mm

Weight 3.7kg (7 lbs 11 oz) Finish

CDX-396

CDX-396BL Black color CDX-396TI Titanium color

CDX-496

CDX-496BL Black color CDX-496TI Titanium color

Accessories Pin plug cord

*Specifications are subject to change without notice.

U ................... U. S. A. model

C ................Canadian model

A .............. Australian model

(17-1/8" x 3-3/4" x 10-7/8")

Remote control transmitter

(Dry-cell : x 2: Size “AA”, R06)

B .................... British model

G ............... European model

R .................. General model

● DIMENSION

435(17-1/8")

(1/4")

277

261.5 (10-7/8")

(10-5/16")

5.5

(3/16")

(3-1/18")

(3-3/4")

(5/8")

Unit : mm (inch)

■

INTERNAL VIEW

CDX-396/496

1 MAIN P.C.B. (3) 2 MAIN P.C.B. (6) 3 MAIN P.C.B. (1) 4 MAIN P.C.B. (4) 5 CD MECHANISM UNIT 6 MAIN P.C.B. (2) 7 MAIN P.C.B. (5) (CDX-496 ONLY)

5 6 7

CD Mchanism Unit

Front Panel

Top Cover

Lid

■

CB200

CB101

PJ100

CB1

CB2

CB3

CB301

CB100

CB202

CB203

DISASSEMBLY PROCEDURES

1. Removal of Top Cover

a. Remove 4 screws ( 1 ) and 3 screws

(2)

in Fig. 1.

b. Lift the Top Cover at the rear and move it rear-ward.

2. Removal of Front Panel

a. Press the OPEN/CLOSE key and open the tray.

Then remove the Lid attached to the front edge of the tray in Fig. 2. Press the OPEN/CLOSE key and close the tray,

then unplug the power cord. b. Remove 2 connectors (CB202, CB301) in Fig. 2. c.

Remove a connector (CB100) in Fig. 2. (CDX-496

only) d. Remove 5 ( 3 ) screws in Fig. 1. e.

Remove 2 hooks and then pull the Front Panel for-

ward.

3. Removal of CD Mechanism Unit

a. Remove 3 connectors (CB1, CB2, CB3) in Fig. 2. b. Remove 4 screws ( 4 ) in Fig. 1.

CDX-396/496

(Remove parts in disassembly order as numbered.)

4. Removal of Tray Unit

a. Remove 2 screws ( 5 ) and then remove the

Chucking Unit in Fig. 3. b. Remove 1 hook and then remove the Stopper Pin

in Fig. 3. c. Rotate the Drive Gear and then open the Tray Unit

in Fig. 3. d. Detach the Stoppers on both sides and then pull

out the Tray in Fig. 3.

5. Removal of Pick-up Head

a. Remove 2 screws ( 6 ) in Fig. 4. b. Remove 4 screws ( 7 ) and then remove the Drive

Unit in Fig. 4. c. Remove the gear A in Fig. 5. d. Pull out the Sled Shaft in Fig. 5. e. Remove the Pick-up Head.

Chucking Unit

Stopper

Stopper Pin

Sub Chassis (S)

Drive Unit

Fig. 1

CDX-396/496

Fig. 2

Drive Gear

Hook

Stopper

Fig. 3 Fig. 4

CDX-396/496

Pick-up Head Gear A

Check that the disc table height is as specified below.

Sled Shaft

Stopper

■

STANDARD OPERATION CHART

POWER ON If a disc is not loaded, "0:00" appears in the time indicator.

Press OPEN/CLOSE key.

Forced feed return operation

Clamp down operation

OPEN

"TRV" signal is output until detection of LIMIT switch.

Disc Table

19.4 ± 0.2mm

Fig. 5

" appears in the TIME indicator.

CDX-396/496

Tray open

Load a disc.

Press PLAY key or push the tray.

Tray closed

Disc mechanism unit clamped up.

Feed inward switch reached.

Tracking offset auto ADJ

Laser ON

Focus offset auto ADJ

Disc scan

Focus gain rough ADJ

Focus search operation

Focus lock servo ON

Spindle motor accelerated.

Tracking servo ON

Stop after detection of LOADING switch.

Proceeds to next step after detection of LOADING switch.

if FLSW = L (IC300, 23 pin) Proceeds To Next Step.

LDON = H (IC1, 5 pin)

FLOCK = H → L (IC300, 18 pin)

TLOCK = H → L (IC300, 19 pin)

Spindle servo ON

VCO lock

Feed servo ON

CDX-396/496

Tracking gain rough ADJ

- * Data f etch cycle -

After searching the beginning, PLAY starts.

- PLAY -

MUTE ON

TRACK search

MUTE ON

Spindle motor stop

: MUTE OFF = H → L (Q201 Collector) 0:00 appears in the time indicator.

Tracking balance ADJ (only tray OPEN/CLOSE)

Focus balance ADJ

Focus gain ADJ

Tracking gain ADJ

* TOC READ

TRACK NO. 1 is searched.

Set to SEARCH by means of , key.

After searching the beginning, MUTE is cancelled.

- PLAY -

Press the STOP key.

Laser OFF

Forced feed return

- STOP -

: MUTE ON = L → H

: MUTE OFF = H → L 0:00 appears in the time indicator.

: LDON = H → L (IC1, 5 pin)

■

TEST MODE

(1) Turning ON the POWER while pressing the keys "PLAY/PAUSE" and "STOP" will set to the TEST mode.

(When the TEST mode is set, all indicators light for 1 second.)

CDX-396/496

(2) Shown below are the panel key and remote control transmitter functions in the TEST mode.

● Function List of Panel keys Note) "Traverse servo" means the same as "feed servo".

PANEL KEY

OPEN/CLOSE

(SKIP/SEARCH)

+10

1 2 3 4 5 6 7 8 9 0

Tray open/close. FOON, TRON, SPON, TVON(FEON). All stop. (Focus, spindle, feed, laser, tray, etc.) Initializes FL display

Inner circumference traverse servo.

Outer circumference traverse servo. Rotating the mode of coefficients. (Coefficient mode --- Coefficient setting --- product mode)

Pressing twice will set to the product mode. Returns to product mode. Auto adjustment mode 1 (TR-off set, FO-off set, FO-rough gain adjustment) Auto adjustment mode 2 (TR-balance, TR-rough gain adjustment) Auto adjustment mode 3 (FO-fine gain, TR-fine gain, FO-balance adjustment)

1 TRACK KICK (–) continuously (Coefficient set up mode : address down)

1 TRACK KICK (+) continuously (Coefficient set up mode : address up) 30 TRACK KICK (–) continuously (Coefficient set up mode : upper digit down) 30 TRACK KICK (+) continuously (Coefficient set up mode : upper digit up)

150 TRACK KICK (–) continuously (Coefficient set up mode : lower digit down) 150 TRACK KICK (+) continuously (Coefficient set up mode : lower digit up)

FUNCTION

● Function List of Remote Control Transmitter

CODE

01 02 04 05 06 07

08 0A 0B 0C 0D 0F 10 11 12 13 14 15

CDX-396/496

16 17 18 19 1A 1B 1E 55 56 57 58 5D

KEY

OPEN/CLOSE

REPEAT

TIME INDEX PROG

CLEAR SPACE

0 1 2 3 4 5 6 7 8 9

+10

RANDOM

DIMMER

TAPE

SYNCHRO

PEAK

CUSTOM CODE = (79)x

FUNCTION

Tray open/close. PLAY (FOON, TRON, TVON(FEON), SPON) Inner circumference traverse servo. Inner 10 tracks kick continuously. Outer 10 tracks kick continuously. Outer circumference traverse servo. FOON, TROF (Enter focus search if focus servo is off.) Checks FL display. (88 8888 --- goes out --- All lamps.) FOON, TROF, TVOF(FEOF) (Enter focus search if focus servo is off.) Rotates or accelerates spindle. Decelerates spindle. (checking EFM pattern and reflected STAT) FOOF, TROF, TVOF(EFOF) 150 TRACK KICK (+) continuously (Coefficient set up mode : lower digit up) Returns to product mode. (tray inoperative.) Auto adjustment mode 1 (TR-off set, FO-off set, FO-rough gain adjustment) Auto adjustment mode 2 (TR-balance, TR-rough gain adjustment) Auto adjustment mode 3 (FO-fine gain, TR-fine gain, FO-balance adjustment)

1 TRACK KICK (–) continuously (Coefficient set up mode : address down)

150 TRACK KICK (–) continuously (Coefficient set up mode : lower digit down) Rotating the mode of coefficients. SPON (Spindle servo on.) Checks FL display. (All lamps --- 88 8888 --- goes out.) FOON, TROF, TVOF(EFOF) (Enter focus search if focus servo is off.) All stop. (Focus, spindle, traverse, laser, tray, etc.) Spindle free (off) TV(Feed) REV

CDX-396/496

■

ERROR MESSAGE

(1) When operation is terminated in an abnormal condition (stop or open), pressing STOP on the remote control while

pressing STOP on the panel will set to the error message display enable mode.

(2) Shown below is an example of display. ("E-73" as an example)

(3) This function stays effective till the power is turned OFF. (It is cleared at OFF.) (4) Listed in the table below are error messages.

● Error Messages List

ERROR MESSAGES

E–X0 E–X1 E–71 E–72 E–73 E–94 E––5 E–X7 E–X8

Er r

Data cannot be read after finishing search. Data cannot be read during PLAY(X=0), PAUSE(X=3), or SCAN(X=2). At the start, tracking servo is not effective. At the start, spindle servo PLL is not effective. At the start, data cannot be read. Close switch does not work with tray closed. Open switch does not work with tray open. Traverse(Feed) inner switch does not work. Recovery action fails after focus drop.

MN35511AL does not give response of SENSE, with resetting by the

DESCRIPTION

unit’s microcomputer.

1) Error Code Troubleshooting

Error code X0 , X1 , 73 ...... Data cannot be read.

Is disc dirty or

scratched?

Pick-up position

Within disc range

Pick-up defective, Spindle system defective (Motor fails to run, etc.).

YES

Outermost

(on mirror surface)

Check by using

another disc.

TRACKING servo defective. FEED servo defective.

*No. for each state (meaning of "X")

PLAY X="0" SCAN X="2" PAUSE X="3" PEAK SEARCH X="4" SEARCH X="5" START X="7" STOP X="8" LOADING X="9" OPEN X="-" NO DISC X="C"

Error codes 94 , – 5 ..... Poor tray loading operation.

Does tray

operate when

OPEN/CLOSE key is

pressed?

Motor defective. Control IC (IC2) defective. Microcomputer defective.

Loading switch defective.

YES

Poor Microcomputer defective.

CDX-396/496

Error code X7 ............. FEED operation defective.

(Limit switch fails)

Is forced

feed operation

available in TEST

mode?

FEED servo defective. Microcomputer defective.

Y...Outward T...Inward

Feed limit switch

YES

defective. Microcomputer defective.

Error code X8 ............ Focus drops.

Is disc dirty or

scratched?

Pick-up position

Within disc range

FOCUS servo defective. Pick-up defective.

YES

Outermost (on mirror surface)

Check by using

another disc.

TRACKING servo defective. FEED servo defective.

CDX-396/496

2) Troubleshooting from System Malfunctions a) Tray fails to come out/go in.

Tray starts to

move but stops.

Is output

available at LOADING

terminal?

FLSW = L

Limit switch defective. FEED servo system defective. Microcomputer, IC1 or IC3 defective.

When tray fails to close completely (when it stops midway)

[Corrective measure]

1) Turn ON the power and open the tray. * If it failed to open (head and tray contacting each other),

open it after removing the chucking unit.

2) Turn OFF the power and force the tray to go in fully and close.

3) With the power turned ON, open and close the tray to check if the tray close completely.

b) No sound generated, Sound cut during play.

( but time display advances properly)

MUTING applied.

CDX-396/496

IC3 or IC200 defective.

c) Operates as if no disc loaded. (although loaded)

Does tray

YES

Poor mechanism operation. Wire caught. Loose gear, etc.

Motor defective.

Microcomputer or LOADING IC (IC2) defective.

load properly?

YES

Is pick-up at

innermost position?

YES

Is FOCUS

lock done?

YES

Does spindle

motor run?

YES

Is EFMI signal

normal?

YES

IC3 defective. Microcomputer defective.

Poor tray loading.

Feed limit switch defective.

FOCUS servo system defective.

Spindle servo system defective.

Jitter defective.

d) Sound skips.

(Time display fails to advance properly)

Is disc dirty,

scratched or

warped?

Is disc or disc

stabilizer in contact with

mechanism?

Tracking servo system defective. FEED servo system defective. FOCUS servo system defective.

YES

MUTING circuit defective. Microcomputer defective.

Pick-up defective.

e) No search provided. (Sound skipped after search)

Is disc dirty,

scratched or

warped?

Is TER

waveform normal?

IC3 defective.

YES

Check by using a known good disc.

Poor mechanism

YES

accuracy. Floating rubber/ spring deformed. Pick-up connector assembly caught.

Check by using a known good disc.

Tracking servo system defective. FEED servo system defective. FOCUS servo system defective. Pick-up defective.

+ 26 hidden pages