Sony HCD-BC150 Service Manual page 71

DVD SECTION
AUTO SERVO ADJUSTMENT
After parts related to the servo circuit (RF amplifier (IC001), DSP
(IC509), motor driver (IC501), EEPROM (IC903) so on) are
replaced, re-adjusting the servo circuit is necessary. Select "ALL"
at "1. DRIVE AUTO ADJUSTMENT" (Refer to page 4 in TEST
MODE) and adjust DVD-SL (single layer), CD and DVD-DL (dual
layer).
[TEST DISC LIST]
Use the following test disc on test mode.
TDV-520CSO (DVD-SL): PART No. J-2501-236-A
LUV-P01 (CD): PART No. 4-999-032-01
TDV-540C (DVD-DL): PART No. J-2501-235-A
Note: Do not use exiting test disc for DVD.
[RFMON Level Check]
Connection:
DMB07 board
CN901 pin 1 (RF)
CN901 pin 3 (GND)
Procedure:
1. Connect an oscilloscope to CN901 pin 1 (RF) and CN901
pin 3 (GND) on the SUB board.
2. Turn the power on.
3. Set the test disc (DVD: TDV-520CSO, CD: LUV-P01) on the
tray and press H button to playback.
4. Confirm that oscilloscope waveform is clear and check
RFMON signal level is correct or not.
Note: A clear RFMON signal waveform means that the shape " " can be
clearly distinguished at the center of the waveform.
RFMON signal waveform
Checking Location: DMB07 board (Side A)
DMB07 BOARD (Side A)
IC901
CN901 pin 1 (RF)
SECTION 2
ELECTRICAL ADJSTMENT
oscilloscope
+
–
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 1.09 0.2 Vp-p (DVD)
1.05 0.2 Vp-p (CD)
IC801
IC207
IC509
IC701
CN501 CN901
CN901 pin 3 (GND)
HCD-BC150/BC250
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