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9 Troubleshooting
Power save management system feilure
Suspend Mode
Does DC +5V appear
at pin 50 of 1C201?
Stand-By Mode
.
Does DC +5V appear at
pin 20 of IC201?
No
1.Check H-Sync input (inactive).
2.Check IC201 and its related
Circuits
Does 0 (zero) V appear at
pin 2 of IC605?
Check IC605 and Q606.
1.Check V-Sync input (inactive).
2.Check IC201.
Off Mode
Does DC +5V appear
at pins 49 and 50 of 1C201?
1.Check H & V Sync input (inactive).
2.Check 1C201.
Check D624, IC602,
0603, 0604, 0607
Does DC +20V appear at
collector of 603?
Table 9-2. DPMS Logic Table
nas
ae
:
LED Color
Normal
Active
Active
Active
Green
Stand-By
Inactive
Active
Blanked
Orange
Suspend
Active
Inactive
Blanked
| Orange/Green-blanking
Off
Inactive
Inactive
Blanked
Orange blanking
Note: If signal cable is removed, DPMS function does not operate and a self raster is displayed.
Samsung Electronics SyncMaster 15GLi
9-7
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