Read Sony HCD-WZ88D Service Manual online
4
HCD-WZ88D
(23) Push A button to eject tray.
(24) Remove Test Disc YEDS-18 from tray.
(25) Push A button to close tray.
(26) Press 0 “R” button to the Drive Manual Operation menu.
(27) Press 0 “R” button to return to the Remocon Diagnosis
Menu.
(28) Press the ?/1 button to switch OFF set.
[EXECUTING IOP MEASUREMENT]
Refer to “• Execute IOP Measurement” on page 18.
[RF Level Check]
Connection:
Procedure:
1. Conect an oscilloscope to CN105 pin 6 (RFMON) and CN105
pin 3 (GND) on the DMB10 board.
2. Turn the power on.
3. Insert the CD test disc (refer to the TEST DISC LIST), and
3. Insert the CD test disc (refer to the TEST DISC LIST), and
press the H button to play the disc back.
4. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
Note:
A clear RF signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
5. Eject the CD disc, and insert the DVD SL test disk (refer to the
TEST DISC LIST), and press the H button to play the disc
back.
back.
Checking Location: DMB10 board (Side A)
+
–
–
CN105 pin
6
(RFMON)
CN105 pin
3
(GND)
oscilloscope
DMB10 board
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
RF signal waveform
level: 0.57
±
1.1 Vp-p (CD)
0.58
±
1.23 Vp-p (DVD)
IC102
IC101
IC104
IC201
CN105
CN106
CN105 pin
3
(GND)
CN105 pin
6
(RFMON)
1
6
