Electrical Adjustments - Sony HCD-GZR9D Service Manual

DVD SECTION
When the optical pick-up assy is replaced, perform the "Execute
IOP Measurement".
Execute IOP Measurement (See page 35)
[TEST DISC LIST]
Be sure to use the DVD disc that matches the signal standards of
your region.
• CD
YEDS-18 (Part No.: 3-702-101-01)
PATD-012 (Part No.: 4-225-203-01)
• DVD SL (Single Layer)
NTSC : HLX-503 (Part No.: J-6090-069-A)
HLX-504 (Part No.: J-6090-088-A)
PAL : HLX-506 (Part No.: J-6090-077-A)
• DVD DL (Dual Layer)
NTSC : HLX-501 (Part No.: J-6090-071-A)
HLX-505 (Part No.: J-6090-089-A)
PAL : HLX-507 (Part No.: J-6090-078-A)
[RFMON Level Check]
Connection:
DMB18 board
CN105 pin (RFMON)
CN105 pin (GND)
Procedure:
1. Connect an oscilloscope to CN105 pin 6 (RFMON) and
CN105 pin 3 (GND) on the DMB18 board.
2. Turn the power on.
3. Set the test disc (refer to the TEST DISC LIST) on the tray
and press [Y] button to playback.
4. Confi rm 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
SECTION 6

ELECTRICAL ADJUSTMENTS

oscilloscope
+
–
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
level: 0.58 ± 1.23 Vp-p (DVD)
0.57 ± 1.1 Vp-p (CD)
HCD-GZR7D/GZR8D/GZR9D
Checking Location: DMB18 board (Side A)
DMB18 BOARD (SIDE A)
IC102
IC101
IC201
CN110
CN105 pin
(RFMON)
TUNER SECTION
FM Tune Level Check
signal
generator
set
Procedure:
1. Turn on the set.
2. Input the following signal from signal generator to FM
antenna input directly.
Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBμ (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and
the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Confi rm "TUNED" is lit on the display for A, B and C
signals.
When the selected station signal is received in good condition,
"TUNED" is displayed.
CN401
CN105
CN105 pin
(GND)
39