Read Sony HCD-GN1200D / MHC-GN1200D Service Manual online
HCD-GN1200D
25
DVD SECTION
3. Mode: Playback
set
MAIN
board
CN510
test tape
P-4-A100
(10 kHz, –10 dB)
pin
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45o
90o 135o 180o
good
wrong
pin
pin
L
R
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
forward
reverse
[TEST DISC LIST]
Use the following test disc on test mode.
• CD:
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)
• DVD (SL)
NTSC
NTSC
HLX-503 (PART No. J-6090-069-A)
or
HLX-504 (PART No. J-6090-088-A)
PAL
HLX-506 (PART No. J-6090-077-A)
• DVD (DL)
NTSC
NTSC
HLX-501 (PART No. J-6090-071-A)
or
HLX-505 (PART No. J-6090-089-A)
PAL
HLX-507 (PART No. J-6090-078-A)
Note: When the BASE UNIT is replaced, perform the IOP mea-
surement
(Refer to page 18 of the TEST MODE).
[RFMON Level Check]
Connection:
Connection:
+
–
–
CN105 pin (RFMON)
CN105 pin (GND)
oscilloscope
DMB16 board
Procedure:
1. Connect an oscilloscope to CN105 pin 6 (RFMON) and CN105
1. Connect an oscilloscope to CN105 pin 6 (RFMON) and CN105
pin 3 (GND) on the DMB16 board.
2. Turn the power on.
3. Set the test disc (DVD: HLX-503 (NTSC) or HLX-504 (PAL),
3. Set the test disc (DVD: HLX-503 (NTSC) or HLX-504 (PAL),
CD: YEDS-18) on the tray and press
C#
button to play-
back.
4. Confi rm that oscilloscope waveform is clear and check RF-
MON 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.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
RFMON signal waveform
level: 0.58 to 1.23 Vp-p (DVDSL)
0.57 to 1.1 Vp-p (CD)
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