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4. Adjustment Procedure
8
Refer to the Location of the Test Points and Adjusting
Controls on this page.
(1). Input Signal Clamp Level Adjustment
Test Point:
TD311 (CLAMP)
Main Board
Adjust:
VR302 (CLAMP)
Main Board
8
Type 108 and press the ENTER key, then the MSM
Decoder mode will start.
8
Connect the terminated Oscilloscope with 75
Ω
to TD311
on the Main Board.
8
Adjust VR302 so that the DC level of Sync Chip becomes
600 mV ± 50 mV as shown in Fig. 4-1.
Fig. 4-1
(2). Input Level Adjustment
Test Point:
Multiscreen Output Connector
Rear Panel
Adjust:
VR301 (DECODER)
Main Board
8
Connect the terminated Oscilloscope with 75
Ω
to the
Multiscreen Output Connector on the Rear Panel.
8
Adjust VR301 so that the signal level becomes 714 mV ±
35 mV (NTSC) or 700 mV ± 35 mV (PAL).
Fig. 4-2
8
After finishing the adjustment, turn off the WJ-HD200 and
quit the Hyper Terminal.
600 mV
±
50 mV
GND
714 mV
±
35 mV
(NTSC)
700 mV
±
35 mV
(PAL)
LOCATION OF TEST POINTS AND ADJUSTING CONTROLS
Main Board
Rear Side
Front Side
VR301
(DECODER)
VR302
(CLAMP)
(CLAMP)
TD311
(CLAMP)
(CLAMP)
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