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DRX-1
VIDEO PART CHECK PROGRESSIVE SCAN
52
3. Digital Board-8
Start Diagnostic Software
and select Command mode
Generate NTSC Testpicture
Command: 135 10 1
Switch off Macrovision
Command: 137
Route PS to Analog Board
Command: 1415
Route Video on Analog Board
Command: 712
Check activity on Yy_OUT(0:7) of IC7801
Check activity on Cr_OUT(0:7) of IC7801
Check activity on Cb_OUT(0:7) of IC7801
OK
Check HSOUT on testpoint I824
Check VSOUT on testpoint I825
OK
Check DAC-A/Y on testpoint I808
Check DAC-B on testpoint I809
Check DAC-C on testpoint I812
OK
Check Y-signal on testpoint I821
Check Cb-signal on testpoint I822
Check Cr-signal on testpoint I823
OK
Video Part Progressive Scan OK
- Check IC 7800
NOK
- Check IC 7801
- Check IC 7701 and IC 7702
NOK
- Check IC 7200
NOK
- Check IC 7801
- Check IC 7802
NOK
- Check IC 7803
- Check R3801, R3812 and R3819
Fig. 11
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