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TROUBLESHOOTING GUIDE
No Yes
Replace F501.
Yes
No
No
Check IC1002.
Yes
POWER DOES NOT TURN ON
Does DISPLAY light ?
Is F501 broken ?
Check the peripheral circuit to
pin 14 of T501.
Check IC1002.
Replace Q510.
No
No
Yes
Yes
Replace Q502.
Is the voltage at pin 20 of
IC1002 about 5V ?
Is the voltage at base of
Q502 about 5V ?
Is the voltage at collector
of Q507 about 5.6V ?
TROUBLESHOOTING GUIDE
E-1