Electrical Troubleshooting Guide; Power (Smps) - LG MCV902 Service Manual

SECTION 3 AUDIO PART ELECTRICAL

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER (SMPS)

NO POWER
NO SOUND
PORTECTION
CHECK AC
LINE PATTERN
CHECK F901 FUSE
CHECK C986
VOLT(5.6V)
INSERT POWER CORD
AFTER 10 SECONDS
CHECK C961, C951
VOLT (OVER
CHECK C958, C968
VOLT (OVER
DISPLAY INSERT POWER
CORD AFTER 1 MINUTE
3-1
CONNECT
THE OPEN LINE
REPLACE FUSE
CHECK BD901 + TO
- PIN IMPEDANCE
CHECK LINE SHORT
CHECK CONNECTION
CN902, CN903
40V)
9V)
CHECK NO SOUND LISTS
LOW IMPEDANCE
CHANGE ASSY
CHECK THE AMP
MODULE SHORT
CHANGE
FR971, 972, 974, 975