SONY CDP-EX100 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

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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 mak e 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

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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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