Read Sony CX-JD33 / CX-JD55 / JAX-D33 / JAX-D55 Service Manual online
6
CX-JD33/JD55
DECISION TO PASS OR FAIL OF THE OPTICAL PICK-UP
BLOCK
BLOCK
Connection:
Procedure:
1. Connect an oscilloscope to test point 1 pin and 3 pin of
CN901 on the DMB07 board.
2. Turn the power on.
3. Put the disc (LUV-P01) (Part No.:4-999-032-01) (CD) in to
3. Put the disc (LUV-P01) (Part No.:4-999-032-01) (CD) in to
playback.
4. Confirm that oscilloscope waveform is clear and check RF
signal level is correrect or not.
5. Put the disc (TDV-520CSO) (Part No.:J-2501-236-A) (DVD)
in to playback.
6. Perform Comfirmation in the same manner as step 4.
Note:
A clear RF signal waveform means that the shape “
◊
” can be clearly
distinguished at the center of the waveform.
Checking Location:
– DMB07 BOARD (Component Side) –
– DMB07 BOARD (Component Side) –
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF
A
2
Turn the loading gear
in the direction of arrow
in the direction of arrow
A
.
1
Remove the steel cabinet case.
3
Pull-out the disc tray.
+
–
–
oscilloscope
DMB07 board
CN901
1
pin
CN901
3
pin
RF signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
CD: 1.05
±
0.2 Vp-p
DVD: 1.09
±
0.2 Vp-p
1
7
CN901
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