Checkpoints By Error Mode - Samsung LE23R86BD Service Manual

4 Troubleshooting

4-2 Checkpoints by Error Mode

4-2-1 No Power
LAMP off, power indicator
LED red color?
Yes
Does proper DC 13V
appear at JP845?
Yes
Does proper DC A3.3V,
A5V appear at
C854, C1166_LCD?
Yes
Does proper DC 5V, 3.3V,
1.2V appear at C1153, C1178,
C1170?
Yes
A power is supplied to set?
TIP: How to drive the circuit by force when LCD panel Lamp is faulty.
- It is available to drive the circuit when the pin of 2 in Main_Power_control CN1101
connect the pin of 4.
4-2
No
Check a connection a power cable.
No
Change a Assy PCB Power.
No
Check a IC1112, Q1103.
Change a main PCB ass'y.
No
Check a IC1111, IC1102, IC1113.
Change a main PCB ass'y
Check a other function.
No
(No picture part)
Replace a lcd panel.