HCD-RV2, HCD-RV5, HCD-RV6 - Sony Audio Service Manual (repair manual). Page 9

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

Therefore, check each item in order given.

2. Use LUV-P01 (Part No. 4-999-032-01) unless otherwise indi-

cated.

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.

Procedure :
1. Connect an oscilloscope to TP68 (FE) and TP73 (DVD) on the

BD board.

2. Turn the power ON.
3. Load a disc (LUV-P01) and actuate the focus search. (In conse-

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

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

cal between A and B. And confirm peak to peak level within 2 ±
0.5 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.

Procedure :
1. Connect an oscilloscope CH1 to TP71 (RFDC), CH2 to TP72

(RFAC) and TP73 (DVD) on the BD board.

2. Turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
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.

Procedure :
1. Connect an oscilloscope to TP70 (TE) and TP73 (DVD) on the

BD board.

2. Turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the  hH  button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope

waveform.

+
–

oscilloscope

BD board

TP68 (FE)

TP73 (DVD)

symmetry

S-curve waveform

within 2 

±

0.5Vp-p

A

B

+
–

oscilloscope

TP71 (RFDC)

TP72 (RFAC)

BD board

TP73 (DVD)

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500ns

level : 0.75 

±

0.1Vp-p (RFDC)

1.05 

±

0.3Vp-p (RFAC)

TP70 (TE)

TP73 (DVD)

BD board

+
–

oscilloscope

level=1.2 

±

0.55Vp-p

symmetry

A (DC voltage)

center of
waveform

B

DVC

1 track jump waveform

– BD BOARD (Conductor Side) –

TP70

(TE)

TP68

(FE)

TP71

(RFDC)

TP73

(DVD)

TP72

(RFAC)