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21HS-50N
Check T701 pin
Does 290V
NO
appear at pin (16)
of T701 (SMT
Check
R701,S701 and
AC in.
Check F751, D758, C702
IC702, Q752 and R615 line
See Many often D1001
Flashes in red, this indicates which
IC to check up.
NVM
(IC1002)
TV Processor
(IC801)
Sound Processor
(IC3001)
TUNER
(TU201)
Protector Circuit
(R1028,D615,D612,D509,D510,D614,D604,D605,Q603)
Note: 4 Times Flash change to NVM-DATA (S-L)
TROUBLESHOOTING TABLES.
NO
16 voltage.
YES
Transf.)
NO
Does 110V
appear in
) ?
Main+B C752
NO
NO RASTER
Check F701
YES
Does F701
appear blown
out?
NO
END
YES
YES
Check D1001
Does Power led
bright red Turn on?
NO
Check C878
Power Led dark red
34
Replace the fuse
Does F701
YES
appear blown
out again?
Check IC701, D701, D702,
D703, D704, C705, Q701
YES
Check CRT
connector K1-K5
BIAS
Check IC801
Heater
2 Times Flash
3 Times Flash
5 Times Flash
6 Times Flash
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