Samsung CKF5607L Service Manual page 34

7 Troubleshooting
7-10 Power Save Management System Failure
7-10-1 Stand-By Mode
Does DC +5 V appear at
Pin 7 of IC202?
Yes
OK
1. Check V-Sync input (inactive)
2. Check Q202.
7-10-3 Off Mode
Does +5 V appear at
Pins 1 and 2 of IC202?
Yes
Does 0 (zero) V appear at
the collector of Q603?
Yes
OK
Mode
H
Normal Active
Stand-By Inactive
Suspend Active
Off Inactive
Note: If the signal cable is removed, DPMS function does not operate and a self raster displays.
7-8
7-10-2 Suspend Mode
No
Does 0 (zero) V appear at
No
1. Check H & V Sync input (inactive)
2. Check IC202
No
Check D609, Q601 and Q603.
Table 7-1. DPMS Logic Table
Sync
Video
V
Active Active
Active Blank
Inactive Blank
Inactive Blank
Does +5 V appear at
Pin 1 of IC202?
Yes
Pin 2 of IC603?
Yes
OK
LED Color
Green
Amber
Green/Amber blinking
Amber blinking
1. Check H-sync input (inactive)
No
2. Check IC202 and its related
circuits
No
Check IC603.
CKF5607L