Samsung SYNCM.400B - Page 54

6 Troubleshooting
CKA42*7L/5227L 6-5
LED ColorVideoMode
Sync
H V
Normal Active Active Active Green
Stand-By Inactive Active Blank Green blinking
Suspend Active Inactive Blank Green blinking
Off Inactive Inactive Blank Green blinking
6-7 Power Save Management System Failure
Table 6-1. DPMS Logic Table
Note: If the signal cable is removed, the DPMS function does not operate and a self raster displays.
Does +5 V appear at
Pin 12 of IC202?
Yes
No
No
1.Check V-sync input (inactive)
2.Check IC202 and its related
circuits
Does 0 (zero) V appear at
Pin 2 of IC604?
Yes
No
Check IC604 and Q602.
OK
6-7-2 Suspend Mode
Does 0 V appear at
Pin 3 of IC202?
Yes
1.Check H-Sync input (inactive)
2.Check IC202
OK
6-7-1 Stand-By Mode
Does +5 V appear at
Pin 12 and 0 V at Pin 13
of IC202?
Yes
No
1.Check H & V Sync input (inactive)
2.Check IC202
Does Q603 cutoff?
Yes
No
Check Q603 and Q606.
OK
6-7-3 Off Mode