LG LM-M1030A Service Manual page 11

• OPEN CLOSE NG
CONNECTOR LOCKING CHECK ( PN808,PN807 )
YES
CHECK POWER SUPPLY CIRCUIT( PN808 ,PN807)
PN808 PIN 5 = 6.2V, PIN 7 = 5V
PN807 PIN 1 = 5V
YES
CHECK VOLTAGE CHANGE OF OPEN CLOSE ,
AND BTLMUTE VOLTAGE(= 5V)
(PN807 PIN 20:OPEN, 19:CLOSE, 4:BTLMUTE)
YES
CHECK VOLTAGE CHANGE LO+, LO- OF IC803
(PN807, PIN OPEN:20, CLOSE:19)
NO
NO
NO
NO
- 2-4 -
DEFECTIVE MAIN
POEWR SUPPLY
DEFECTIVE MICOM
DEFECTIVE IC803
DEFECTIVE
MECHANISM