CFD-RS60CP - Sony Audio Service Manual (repair manual). Page 16

16

Use the following test disc on test mode.

• CD:

YEDS-18 (PART No. 3-702-101-01)

or

PATD-012 (PART No. 4-225-203-01)

1. CD Block is basically designed to operate without adjustment.

Therefore, check each item in order given.

2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MW impedance.
4. Clean the object lens by an applicator with neutral detergent

when the signal level is low than specified value with the
following checks.

1. Connect an oscilloscope to TP106 (FE) and TP124 (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and actuate the focus search. (In

consequence of open and close the disc tray, actuate the focus
search).

4. Confirm that the oscilloscope waveform (S-curve) is

symmetrical between A and B. And confirm peak to peak level
within 1.7 

±

 0.7 Vp-p.

• 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.

+
–

TP106 (FE)

TP124 (VC)

oscilloscope 

BD91 board

symmetry

S-curve waveform

within 1.7 

±

0.7Vp-p

A

B

1. Connect an oscilloscope to TP123 (RFO) and TP124 (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF

signal level is correct or not.

Clear RF signal waveform means that the shape “

◊” can be clearly

distinguished at the center of the waveform.

Connecting Location: CD board

+
–

TP123 (RFO)

TP124 (VC)

oscilloscope 

BD91 board

RFMON signal waveform

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

level: 1.3 

±

 0.3 Vp-p 

IC401

– BD91 Board (SIDE B) –

TP124

(VC)

TP123

(RFO)

TP106

(FE)

IC101

1

1

14

15

28

25

26

50

51

75

76

100