TROUBLESHOOTING GUIDE
E-1
(LCD SECTION)
POWER DOES NOT TURN ON
NO
IS F3801 BROKEN ?
YES
CHANGE F3801.
NO
YES
CHECK IC3803, AND AT 5V
LINE.
IS THERE VOLTAGE
OF 2 PIN OF IC3803
AT11.8V AND 4 PIN
AT5V ?
NO
IS THERE VOLTAGE
AT PINS 1~6, 10 AND
11 OF CD3804 ?
CHECK Q3804, IC3804, IC3805,
IC3806 AND IC3809.
NO
YES
CONNECT CD2200
IS CD2200
CONNECTED ?
YES
NO
CHECK IC101.
YES
CHANGE SCALER PCB.
AT STATE OF POWER
KEY PUSHING, IS THERE
LOW AT PIN 93 OF IC101 ?