Yamaha DRX-1 Service Manual page 61

DSW CHECK ANALOGUE BOARD
Start Diagnostic Software
and select Command mode
Echo Test Analogue Board
Command: 700
OK
Boot Code Version Test
Command: 703
Analogue Flash Checksum Test
Command: 724
OK
Hardware Version Check
Command: 704
OK
Clock Adjust Test
Command: 705 2001 07 16 09 15 45
(YYYY MM DD HH MM SS)
OK
Tuner Test
Command: 706
OK
Frequency Download Test
Command: 707
NVRAM Test
Commdo: 711
OK
Data Slicer Test
Command: 708
OK
Sound Processor Test
Command: 709
OK
Audio Video Selector Test
Command: 710
OK
DCW CHECK ANALOGUE
BOARD OK
4. Analog Board-5
- Check Reset signal(+5V) on F902
- Check Clock(20MHz) on I915
NOK
- Check connection to Digital Board
- Check IC 7803
NOK
- Check IC 7906
NOK
- Check IC 7906
- Check IC 7811
NOK
- Check x-tal 1602
NOK
- Check tuner 1705
NOK
- Check IC 7815
NOK
- Check IC 7990
NOK
- Check IC 7600
NOK
- Check IC 7507
Fig. 20
DRX-1
61