Reading Display Check (= Only "Cd "Display) - LG LM-M540 Service Manual

READING DISPLAY CHECK (= ONLY "CD "DISPLAY)

CONNECTOR LOCKING CHECK
(PN808,PN807,PN802,PN801 )
YES
CHECK POWER SUPPLY
PORT( PN808 ,PN807)
PN808 PIN 5 = 6.2V, PIN 7 = 5V
PN807 PIN 1 = 5V
YES
CHECK VOLTAGE THE PIN 2 OF IC805
IC805 PIN2 : 3.3V
YES
CHECK RESET SIGNAL OF PN807
PN807 PIN12 : 5V
YES
CHECK MICOM INTERFACE
CIRCUIT( PN807 )
PN807 PIN 11,13,14,15 SIGNAL CHECK
(11: STAT, 13: MDATA, 14:MCLK, 15:MLD)
CHECK THE WAVE FORM #1
YES
NO
NO
NO
NO
NO
- 2-12 -
DEFECTIVE CONNECTOR OR
MAIN POWER SUPPLAY
DEFECTIVE IC805
DEFECTIVE MICOM OR
CONNECTOR
DEFECTIVE MICOM OR
CONNECTOR
DEFECTIVE IC801