Electrical Adjustments - Sony DVX-100 Service Manual

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Preparation
• Use DVD-ROM disc for test as follows.
NTSC:
HLX-504 (J-6090-088-A) (single layer)
HLX-505 (J-6090-089-A) (dual layer)
PAL:
HLX-506 (J-6090-077-A) (single layer)
HLX-507 (J-6090-078-A) (dual layer)
• Before perform the adjustments, connect the FM modulator.
Video Frequency Adjustment
Connection:
MPEG board
TP (27MHz)
Procedure:
1. Connect a frequency counter to TP (27MHz) and GND on the
MPEG board.
2. Adjust CT501 on the MPEG board so that the frequency
counter reads 27 MHz ± 0.1 kHz.
TE
L 13942296513
Adjustment Location:
– MPEG BOARD (Component Side) –
Video Output Level
– MPEG BOARD (Conductor Side) –
CS151
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ELECTRICAL ADJUSTMENTS

frequency counter
+
–
SVR181
CT501
Adjustment
Video Frequency
Adjustment
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SECTION 5
8
Video Output Level Adjustment
Connection:
CS151 1 (VIDEO OUT REAR)
Procedure:
1. Connect an oscilloscope to CS151 pin 1 (VIDEO OUTPUT
REAR) and pin 3 (GND) on the MPEG board.
2. Playback the color bars (100%) of the test disc.
3. Adjust SVR181 on the MPEG board so that the waveform level
of the oscilloscope is 1.0 ± 0.1 Vp-p.
Q Q
3 6 7 1 3
u163
TP (27MHz )
.
2 9 9 4 2 8
MPEG board
CS151 3 (GND)
1 5 0 5 8 2 9 9 4
m
co
DVX-100
9 9
oscilloscope
+
–
1.0 ± 0.1 Vp-p
2 8 9 9
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