Yamaha DRX-1 Service Manual page 51

DSW VIDEO PART CHECK
Start Diagnostic Software
and select Command mode
Gateway Test to Analog Board
Command: 700
Color Bar ON Test
Command: 120
Check Red Video Out on pin 5 of con.1601
Check Green Video Out on pin 3 of con.1601
Check Blue Video Out on pin 1 of con.1601
Check CVBS Video Out on pin 11 of con.1601
Check Y-Video Out on pin 9 of con.1601
Check C-Video Out on pin 7 of con.1601
Check HSYNC on testpoint I221
Check VSYNC on testpoint I701
Color Bar OFF Test
Command: 121
VBI(Vertical Blanking Interval) Loopback Test
Command: 903
Check the Color Bar on the TV creen
VIDEO PART OK
3. Digital Board-7
OK
OK
OK
OK
OK
OK
Fig. 10
- Check Analog Board
NOK
- Check IC 7100
- Check T7600, T7601, T7603
NOK
T7604, T7605 and T7606
- Check IC 7200
- Check IC 7200
NOK
- Check IC 7701
- Check IC 7702
- Check IC 7200
NOK
- Check IC 7500
- Check IC 7100
DRX-1
51