Service manual

21HT-15C
21HT-16C
35
Explanation:
NVM
(IC1002)
TV Processor
(IC801)
TUNER
(TU201)
Protector Circuit
(R1028,D615,D612,D509,D510,D614,D604,D605,Q603)
NO RASTER
Does F701
appear blown
out?
NO YES
Check D1001
Does Power LED
bright red Turn on?
Check CRT
connector K1-K5
BIAS
Check IC701, D701, D702,
D703, D704, C705, Q701
Check F701
Replace the fuse
Does F701
appear blown
out again?
Check T701 pin
16 voltage.
Does 290V
appear at pin (16)
of T701 (SMT
Transf.)
YES NO
END
NO YES
Check
R701,S701 and
A
C in.
Does 110V
appear in
Main+B C752
) ?
Check F751, D758, C702
IC702, Q752 and R615 line
NO YES
See Many often D1001
Flashes in red, this indicates which
IC to check up.
NO YES
Check C878
NO YES
Check IC801
Heater
TROUBLESHOOTING TABLES
2 Times Flash
3 Times Flash
6 Times Flash
Power LED dark red