Troubleshooting Guide - LG STUDIOWORKS 77M Service Manual
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Also See for STUDIOWORKS 77M:
- User manual (25 pages) ,
- User manual (20 pages) ,
- User manual (18 pages)
Table of Contents
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NO POWER
(POWER INDICATOR OFF)
CHECK
FUSE OK?
YES
CHECK
C907 VOLTAGE?
(AC120V: 170VDC,
AC220V: 310VDC)
YES
CHECK
IC901 PIN 3
WAVEFORM
(SQUARE WAVE
COMES OUT?)
YES
CHECK
D920, D922, D924,
D923, D926
VOLTAGE?
YES
TROUBLE IN
IC923, IC925, Q922,
Q923, Q924, Q926
TROUBLESHOOTING GUIDE
1. NO POWER
NO
NO
NO
NO
TROUBLE IN FUSE
(F901)
TROUBLE IN
D901, D902, D903, D904
TROUBLE IN
IC901, IC902
TROUBLE IN
D920, D922, D923,
D924, D926
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Table of Contents
