Samsung CKG7507L

7 Troubleshooting
7-8 CKG7507L
LED ColorVideoMode
Sync
H V
Normal Active Active Active Green
Stand-By Inactive Active Blank Amber
Suspend Active Inactive Blank Amber/Green blinking
Off Inactive Inactive Blank Amber blinking
7-10 Power Save Management System Failure
Does +5 V appear at
Pins 12 and 13 of IC201?
Yes
No
1.Check H & V Sync input (inactive)
2.Check IC201
Does Q604, Q606 and
Q302 activate?
Yes
No
No
Check Q604, Q606 and Q302.
Check Q605, Q404 and Q603.
Does Q605, Q404 and
Q603 in active?
Yes
OK
7-10-3 Off Mode
Table 7-1. DPMS Logic Table
Note: If the signal cable is removed, DPMS function does not operate and a self raster displays.
Does +5V appear at Pin 12
of IC201?
Yes
No
1.Check V-sync input (inactive)
2.Check IC201 and its related
circuits
Does Q604 and Q302
activated?
Yes
No
Check Q604, Q302, Q404,
D501 and D404.
OK
7-10-2 Suspend Mode
Does the pulse appear at
Pin 37 of IC201?
No
Yes
Check H-sync input of signal
cable.
OK
7-10-1 Stand-By Mode