LG FH6 - Lighting (Spk Led, Sparkling Led)

3-17
ONE POINT REPAIR GUIDE
6. NO LIGHTING (SPK LED, SPARKLING LED)
6-1. SPK LED, Sparkling LED
6-1-1. Solution
Check the following steps.
6-1-2. How to troubleshoot (Countermeasure)
1) Check CN104 and harness cable connection.
Check LED control signal of CN104.
- SPK LED : pin5, 6, 7, 9, 10, 11
- Sparkling LED : pin13, 14, 15, 17, 18, 19
If the signal is OK, check LED PCB assembly.
2) Check LED control signal of IC101.
- SPK LED : pin5, 15, 16, 20, 21, 22
- Sparkling LED : pin24, 25, 26, 27, 28, 29
If the signal is abnormal, replace IC101.
3) Check LED_5V of LED control TR emitter.
If LED_5V is abnormal, check IC307.
4) Check LED control TR. (Q101 ~ Q124)
6-1-3. Service hint (Any picture/ Remark)
< MAIN board top view >
IC307
IC307
(TJ4310)
(TJ4310)
CN104
CN104
IC101
IC101