Electrical Troubleshooting Guide; Power Supply On Smps Board - LG LAS950M Service Manual
Smart hi-fi audio wireless multi-room sound bar
Hide thumbs
Also See for LAS950M:
- Owner's manual (71 pages) ,
- Simple manual (4 pages) ,
- Owner's manual (71 pages)
Table of Contents
Advertisement
ELECTRICAL TROUBLESHOOTING GUIDE
1. POWER SUPPLY ON SMPS BOARD
Power on mode no output 25 VA.
Power off mode no output 12 VA.
Is F901 normal?
Is IC901 normal?
Is the VCC
(10 ~ 28 V) supplied to IC901
pin4?
Is Q901 normal?
Is PC901 normal?
Is IC910 normal?
Is D917 normal?
Power line of MAIN board is short.
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
Check or replace
NO
NO
NO
NO
2-12
Replace F901.
(same fuse)
Replace IC901.
Replace D903.
NO
D904.
YES
Replace Q903.
Replace Q901.
Replace PC901.
Replace IC910.
Replace D917.
Hide quick links:
Advertisement
Chapters
Table of Contents
