Table of Contents
Advertisement
4-1-1. No Power
The PD board relay does not work when connecting the power cord.
-
Symptom
The units appears to be dead.
-
The IP relay does not work when connecting the power cord if the cables are improperly connected or the
Main Board or IP is not functioning. In this case, check the following:
Check the internal cable connection status inside the unit.
-
Major
Check the fuses of each part.
checkpoints
-
Check the output voltage of IP.
-
Replace the Main Board.
-
Caution
Make sure to disconnect the power before working on the IP board.
When power on, check the sound of
A5V appear at the PIN 27 of CN201?
Diagnostics
A power is supplied to panel appear
relay on?
Yes
Does proper Stand-By DC
Yes
Does proper Main DC B12VS,
B5V,B13V appear at the PIN 21-22,
PIN 15-18, PIN 9-11?
Yes
Does proper DC A3.3V appear at the
Pin5 of IC202?
Yes
Does proper DC B3.3V appear at
1pin of IC208 and IC210, B9V
appear at 3pin of IC205?
Yes
Does proper chelsea core 1.2V, 1.8V
appear at C246, C236?
Yes
at C1019L?
No
Check a connection power cable.
P/N: BN96-09873A
Change the Main Power assembly
No
40" / 46" : BN44-00269A
55" : BN44-00271A
No
Check IC105 change the Main assy
No
40" / 46" : BN44-00269A
55" : BN44-00271A
Check IC205, IC208, IC210
No
Change the Main assy
Check IC203, IC207
Change the Main Assy
No
40" / 46" : BN44-00269A
55" : BN44-00271A
Check a other function (No picture part)
Replace a LCD Panel
No
40" : BN07-00700B
46" : BN07-00701B
55" : BN07-00702B
4. Troubleshooting
BN9402640B
4-5
Advertisement
Table of Contents
