Suspend Mode - Samsung CKA4217L Service Manual

6-7 Power Save Management System Failure
6-7-1 Stand-By Mode
Does 0 V appear at
Pin 3 of IC202?
Yes
OK
1. Check H-Sync input (inactive)
2. Check IC202
6-7-3 Off Mode
Does +5 V appear at
Pin 12 and 0 V at Pin 13
of IC202?
Yes
Does Q603 cutoff?
Yes
OK
Mode
H
Normal Active
Stand-By Inactive
Suspend Active
Off Inactive
Note: If the signal cable is removed, the DPMS function does not operate and a self raster displays.
CKA42*7L/5227L

6-7-2 Suspend Mode

No
Does 0 (zero) V appear at
No
1. Check H & V Sync input (inactive)
2. Check IC202
No
Table 6-1. DPMS Logic Table
Sync
Video
V
Active Active
Active Blank
Inactive Blank
Inactive Blank
Does +5 V appear at
Pin 12 of IC202?
Yes
Pin 2 of IC604?
Yes
OK
Check Q603 and Q606.
LED Color
Green
Green blinking
Green blinking
Green blinking
6 Troubleshooting
1. Check V-sync input (inactive)
No
2. Check IC202 and its related
circuits
No
Check IC604 and Q602.
6-5