Sony HCD-ZUX9 Service Manual - Page 33

Sony HCD-ZUX9 Manual

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HCD-ZUX9 CD SECTION [TEST DISC LIST] 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) Note: 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. [S-CURVE CHECK] BD91 board TP106 (FE) TP124 (VC) oscilloscope + - [RF LEVEL CHECK] BD91 board TP123 (RFO) TP124 (VC) oscilloscope + - Procedure : 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. Note: Clear RF signal waveform means that the shape "◊" can be clearly distinguished at the center of the waveform. RFMON signal waveform VOLT/DIV: 200 mV TIME/DIV: 500 ns level: 1.3 ± 0.3 Vp-p Procedure : 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 3 ± 0.5 Vp-p. S-curve waveform symmetry Connecting Location: CD board - BD91 Board (SIDE B) - A within 3 ±0.5Vp-p B TP124 (VC) 28 15 IC401 1 14 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. TP123 (RFO) 75 76 51 50 IC101 100 1 TP106 (FE) 26 25 33

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33
HCD-ZUX9
[TEST
DISC
LIST]
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)
Note:
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.
[S-CURVE
CHECK]
Procedure :
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 3
±
0.5 Vp-p.
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.
CD SECTION
+
–
TP106 (FE)
TP124 (VC)
oscilloscope
BD91 board
symmetry
S-curve waveform
within 3
±
0.5Vp-p
A
B
[RF
LEVEL
CHECK]
Procedure :
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.
Note:
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