One Point Repair Guide - LG SNC4R Service Manual

1. How to Duplicate Problem
Wireless rear speaker doesn't output a sound.
1-1. Solution
Replace SMPS board (No PVDD).
1-2. How to troubleshoot (Countermeasure)
Check LED color of RX BOX.
Color is yellow?
Try to remate or reset.
2. How to Duplicate Problem
Wireless rear speaker doesn't output a sound.
2-1. Solution
Replace AMP board (No 12 V).
2-2. How to troubleshoot (Countermeasure)
AMP 12 V
(RIC308 pin4)
no output.
NO
Check 3.3 V.
2-3. Service hint (Any picture / Remark)
RIC307 RIC307 RIC307
< AMP board top view >

ONE POINT REPAIR GUIDE

YES
NO
YES
Replace AMP board.
RIC308 RIC308 RIC308
14 VA
YES
(RIC308 pin2)
no input.
NO
5-4
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Replace SMPS board.
Replace SMPS board.
Only for training and service purposes.