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TROUBLESHOOTING GUIDE
POWER DOES NOT TURN ON
Does DISPLAY light ?
is F501 broken ?
Replace F501.
< Is the voltage at collector
of Q509 6V ?
Check 1C1008.
Check the peripheral circuit to
pin 11 of T501.
< Is the voltage at pin 84 of
1C1006 about 5V ?
Check IC 1006.
Is the voltage at base of
Q509 about 5V 7
Replace Q505.
Yes
Replace Q509.
24
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