One Point Repair Guide - LG SPM2 Service Manual

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Table of Contents

1. NO BOOTING WHEN YOU TURN THE UNIT ON, STANDBY LED DOESN'T WORK

When you turn on your set, LED doesn't work.

1-1. IC801 STBY_5V

1-1-1. Solution

Replace MAIN board.

1-1-2. How to troubleshoot (Countermeasure)

1) Please check 20 VA of IC801 pin3(VIN).

2) If 25 VA is abnormal, please check SMPS.

3) If 25 VA is OK, but STBY_5V is abnormal pin2 of IC801 (VOUT), replace MAIN board.

1-1-3. Service hint (Any picture / Remark)

L804

220ohm /2200m A

ONE POINT REPAIR GUIDE

ST-BY5V

CKST 0603-10UH /M

L805

< MAIN board top view >

Vout= 0.596 x { 1 + (R2/R3)}

L805

 

IC801

3-4

ST BY _5V



670m A

L806

220ohm /2200m A

D GND

Only for training and service purposes.

Table of Contents

Table of Contents