TROUBLESHOOTING GUIDE
E-1
(LCD SECTION)
POWER DOES NOT TURN ON
YES
NO
CHECK IC101.
NO
YES
CHANGE LCD PCB.
IS THERE VOLTAGE AT
PIN 1~6 OF CD3804 ?
CHECK Q3804, IC3804, IC3805,
IC3806 AND IC3809.
NO
IS F3801 BROKEN ?
YES
CHANGE F3801.
NO
YES
CHECK IC3803, AND AT 5V
LINE.
IS THERE VOLTAGE
OF 1 PIN OF IC3803
AT9.5V AND 3 PIN
AT5V ?
AT STATE OF POWER
KEY PUSHING, IS THERE
HI AT PIN 6 OF IC101 ?