Sharp VC-M29GM Serviceanleitung Seite 14

7. TROUBLESHOOTING
FLOWCHARTNO.I POWERTROUBLESHOOTING (1)
Unplugthe AC power cord.
Replug it a few minutes later.
Is the fuse good?
YES
Is AT 5V voltage line normal?
YES
AreAT45V, AT18V, AT
AT5.5V, AT-25V and filament voltage
lines normal?
YES
Is "H" level applied at pjn (56) of
YES
Check system control circuit (IC701)
and cam switch circuit.
No power.
See FLOW CHART NO.2 POWER
TROUBLE SHOOTING (2)
NO
NO
Check primary circuit.
NO
Check each rectifier circuits and
short-circuit of secondary circuit.
NO
Check peripheral cirsuits Q923 and
P-FAIL (L) signalline etc.
NO
Replace fuse.
FLOWCHARTNO.2
In case of F
Replace F901, 0901, IC903 and
R902,check D901 as a result of
check,jf poor, replace at the same
time.
FLOWCHARTNO.3P
In case of ab
Check 0927, D921and D926.
FLOWCHARTNO.4P
In case of outp
Check the 13928, 0921 and Q922.
YES
Check IC901
YES
Check short-circuit or leak of T901.
YES
Check primary circuit, Q901and
IC903.
NO
NO
NO