"Reading" Display Check - LG LM-U1060 Service Manual

I " READING " DISPLAY CHECK (= ONLY "CD" DISPLAY)
CONNECTOR LOCKING CHECK
(PN802, PN803,PN804,PN805,CN806 )
CHECK POWER SUPPLY PORT( PN805,
CN806) CN806 PIN1: 12V, PIN2: 6.3V,
PIN4: 5V PN805 PIN8 = 5V_AD
CHECK VOLTAGE THE PIN 2 OF IC804
IC804 PIN2 : 3.3V
CHECK RESET SIGNAL OF PN805
PN805 PIN19: 5V
CHECK MICOM INTERFACE CIRCUIT( PN805 )
PN805 PIN 1,3,4,15,19,26 SIGNAL CHECK
(1: CE, 3: DI, 4: CLK, 15: D0, 19: RST, 18:
FSEQ, 26: WRQ)
PIN3 DI : FROM DSP TO MICOM
PIN15 DO: FROM MICOM TO DSP
CHECK THE WAVE FORM #1
DEFECTIVE IC801
DEFECTIVE CONNECTOR OR
MAIN POWER SUPPLAY
DEFECTIVE MICOM OR CONNECTOR
DEFECTIVE MICOM OR CONNECTOR
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DEFECTIVE IC804