Samsung SyncMaster 700s Plus Service Manual page 34

7 Troubleshooting
7-10 Power Save Management System Failure
7-10-1 Stand-By Mode
Does the pulse appear at
Pin 37 of IC201?
No
OK
Check H-sync input of signal
cable.
7-10-3 Off Mode
Does +5 V appear at
Pins 12 and 13 of IC201?
Yes
Does Q604, Q606 and
Q302 activate?
Yes
Does Q605, Q404 and
Q603 in active?
Yes
OK
Table 7-1. DPMS Logic Table
Sync
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
Yes
Does +5V appear at Pin 12
of IC201?
Does Q604 and Q302
activated?
No
1. Check H & V Sync input (inactive)
2. Check IC201
No
Check Q604, Q606 and Q302.
No
Check Q605, Q404 and Q603.
Video
V
Active Active
Active Blank
Inactive Blank Amber/Green blinking
Inactive Blank
No 1. Check V-sync input (inactive)
2. Check IC201 and its related
Yes
No
Yes
OK
LED Color
Green
Amber
Amber blinking
circuits
Check Q604, Q302, Q404,
D501 and D404.
CKG7507L