Sony CDPEX-100 Service manual

CDP-EX100

SERVICE MANUAL

This set is the CD player section in MHC-EX50/EX70AV/EX100AV.

SPECIFICATIONS

AEP Model

UK Model

E Model

Model Name Using Similar Mechanism CDP-EX10 CD Mechanism Type CDM28-5BD19 Base Unit Name BU-5BD19

MICROFILM

COMPACT DISC PLAYER

– 1 –

The laser component in this product

is capable of emitting radiation exceeding the limit for Class 1.

TABLE OF CONTENTS

1. SERVICE NOTE .................................................................. 3

The following caution label is located inside of the unit.

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

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 dam-

aged by heat.

2. GENERAL ............................................................................. 4

3. DISASSEMBLY

3-1. Loading Panel.......................................................................... 4

3-2. MD Block................................................................................ 5

3-3. Holder (BU) Assy.................................................................... 5

4. ELECTRICAL ADJUSTMENTS .................................... 6

5. DIAGRAMS

5-1. IC Pin Function ....................................................................... 8

5-2. Circuit Boards Location ........................................................ 10

5-3. Printed Wiring Board – BD Section –................................... 11

5-4. Schematic Diagram – BD Section –...................................... 13

5-5. Printed Wiring Boards – Main Section – .............................. 16

5-6. Schematic Diagram – Main Section –................................... 19

6. EXPLODED VIEWS

6-1. Chassis Section...................................................................... 26

6-2. Front Panel Section ............................................................... 27

6-3. CD Mechanism Section......................................................... 28

6-4. Base Unit Section .................................................................. 29

7. ELECTRICAL PARTS LIST .......................................... 30

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

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown 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.

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 objectiv e lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE P AR TS 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.

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SECTION 1

SERVICE NOTE

• How to operate with a single unit

Normally this set does not operate with a single unit. When you must be mending, connect to other unit. If the SYSTEM POWER switch of the amplifire is set to ON, the power supply of the set is turned on. In case of other unit is nothing, the service box (PFJ-1) and exclusive jig (J-2501-078-A) are necessary to operate the set with a single unit. In case of above mentioned, press the p button and TIME button at the same time, to enter the power on.

SERVICE BOX (PFJ-1)

POWER SW

JIG (J-2501-078-A)

SET

FH-E939, 838, 737 CDP/TC

CORD WITH CONNECTOR 17P (attached to PFJ-1)

• FL tube/ KEY check mode

After to enter the power on, when p button, TIME button and

) button are pressed at the same time, you will be check FL

tube. Whenever press the above mentioned three buttons at the same time, change to check mode of FL tube. Under check mode of FL tube when any pressing button or turn

= AMS + button, change to KEY check mode. To finish KEY check mode, press the above mentioned three buttons at the same time.

All FL tube indicator light on

nn n

(Press three buttons at the same time)

A segment pattern mode 1

(Press three buttons at the same time)

A segment pattern mode 2

(Press three buttons at the same time)

Finish the test mode

CN904

17P

CN902

CORD WITH CONNECTOR 7P (attached to set)

CN301 7P

SYSTEM CONTROL

Any pressing button or turn = AMS + button.

(

KEY check mode

(Press three buttons at the same time)

Note 1)

All FL tube light on mode is kept when three buttons which is pressed to enter all FL tube light on mode, release at the same time. If you will be release failure them, it is moved to KEY check mode after all FL tube light on mode.

Note 2)

Under KEY check mode, every time and button pressed or = AMS + button turned on, figure on “ KEY= ” of FL tube is increased.

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SECTION 2

GENERAL

Front Panel Display Window

This section is extracted from instruction manual.

SECTION 3

DISASSEMBLY

Note : Follo w the disassembly procedure in the numerical order giv en.

3-1. LOADING PANEL

bottom of chassis

Turn the cam in the

direction of arrow.

bottom of chassis

Pull out the disc table.

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claws

Remove the loading panel

in the direction of arrow.

3-2. MD BLOCK

claws

BVTP 3×8

MD block

(CDM28-5BD19)

CN202

3-3. HOLDER (BU) ASSY

Turn the cam in the direction of arrow.

holder (BU) assy

(BU-5BD19)

CN201

yoke bracket

Pull out disc table.

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SECTION 4

ELECTRICAL ADJUSTMENTS

Note :

1. Basically designed to operate without adjustment. Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the objective lens by an applicator with neutral detergent when the signal level is low than specif ied value with the following checks.

5. Adjust the focus bias adjustment when optical block is replaced.

Focus Bias Adjustment

oscilloscope (DC range)

BD board

TP (RF)

Procedure:

1. Connect oscilloscope to test point TP (RF). (GND terminal : VC)

2. Turn Power switch on.

3. Put disc (YEDS-18) in and playback.

4. Adjust RV101 so that the waveform is clear. (Clear RF signal waveform means that the shape “ ≈ ” can be clearly distinguished at the center of the waveform.)

5. After adjustment, check the RF signal level.

S Curve Check

oscilloscope

BD board TP (FEO)

TP (FOK)

Procedure:

1. Connect oscilloscope to test point TP(FEO).

2. Connect between test point TP(FOK)and GND by lead wire.

3. Turn Power switch on.

4. Put disc (YEDS-18) in and turnd Power switch on again and actuate the focus search. (In case of using SER VICE BO X actuate the focus search when disc table is moving in and out.)

5. Check the oscillosope waveform (S-curve) is symmetrical between A and B. And conf irm peak to peak level within 2.4±0.7 Vp-p.

S-curve waveform

symmetry

within 2.4±0.7 Vp-p

• RF signal VOLT/DIV : 200 mV TIME/DIV : 500 nS

level

1.3±0.3 Vp-p

6. After check, remove the lead wire connected in step 2. Note : • Try to measure several times to make sure than the ratio of

A:B or B:A is more than 10:7.

• Take sweep time as long as possible and light up the brightness to obtain best waveform.

RF Level Check

oscilloscope

BD board

TP (RF) TP (VC)

Procedure:

1. Connect oscilloscope to test point TP (RF) on BD board.

2. Turn Power switch on.

3. Put disc (YEDS-18) in and playback.

4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

Note :

Clear RF signal waveform means that the shape “ ≈ ” can be clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV TIME/DIV : 500nS

– 6 –

level : 1.3±0.3 Vp-p

E-F Balance Check

oscilloscope

BD board TP (TEO)

TP (VC)

Procedure:

1. Connect oscilloscpe to test point TP (TEO).

2. Turn Power switch on.

3. Connect pin @¢ of IC60I on the P ANEL board to GND with a lead wire.

4. Put disc (YEDS-18) in and playback.

5. Push TIME button.

6. Confirm that the oscilloscope waveform is symmetrical on the top and bottom in relation to 0Vdc, and check this level.

Adjustment Location : [BD BOARD] (Conductor Side)

RV101

IC101

RV103

TEO

RV102

FEO

TEI

FEI

FOK

IC102

Traverse waveform

symmetry

level : 300±100 mVp-p

7.Remove the lead wire connected in step 3.

Focus/Tracking Gain Adjustment (RV102, 103)

This gain has a margin, so even if it is slightly off. There is no problem. Therefore, do not perform this adjustment. Please note that it should be fixed to mechanical center position when you moved and do not know original position.

IC104

GND

PCK

[PANEL BOARD] (Conductor Side)

IC601

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+ 16 hidden pages