Sony HCD-GNZ333D Service Manual page 30

HCD-GNZ333D/GNZ444D
Ver. 1.1
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DVD SECTION
When the optical pick-up assy is replaced, perform the "Execute
IOP Measurement".
Execute IOP Measurement (See page 25)
[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:
DMB16 board
CN105 pin 6 (RFMON)
CN105 pin 3 (GND)
TE
L 13942296513
Procedure:
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 (refer to the TEST DISC LIST) on the tray
and press button to playback.
DVD N
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
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oscilloscope
+
–
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 0.58 ± 1.23 Vp-p (DVD)
0.57 ± 1.1 Vp-p (CD)
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8
Checking Location: DMB16 board (Side A)
DMB16 BOARD
(SIDE A)
CN105
1 6
IC104
VIDEO SECTION
Video Level Check (MAIN BOARD)
Purpose
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
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3 6 7 1 3 1 5
set
J701
VIDEO OUTPUT
Procedure:
1. Connect oscilloscope to VIDEO output.
2. Load a DVD reference disc playback.
3. Check the video signal level is 1.00 ± 0.07Vp-p.
(WHITE 100%)
co
.
9 4 2 8
CN105 pin 3 (GND)
CN105 pin 6 (RFMON)
IC101
IC102
oscilloscope
0 5 8 2 9 9 4 2 8
75 Ω
1.00 ± 0.07 Vp-p
m
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