Samsung AQ17LS Service Manual page 18

5 Troubleshooting
5-1-2 DPMS Failure
Check signal source
H/V Sync. video level.
Make No H/V Sync. (power off
mode)
LED blinks?
Yes
+12 V line off?
Yes
IC601 Pin 1 output
2
voltage exists?
Yes
Done
5-2
No
Check IC201 Pin 40.
No
Check IC201 Pin 6.
No
Refer to 5-1-1 No Power Supply.
WAVEFORMS
100 V (IC601, #1)
2
CH1 P-P = 100 V CH1 RMS = 325.8 V
AQ17LS