34
21HS-50N
NVM
(IC1002)
TV Processor
(IC801)
Sound Processor
(IC3001)
TUNER
(TU201)
Protector Circuit
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
AC 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
5 Times Flash
6 Times Flash
Power Led dark red
Note: 4 Times Flash change to NVM-DATA (S-L)
(R1028,D615,D612,D509,D510,D614,D604,D605,Q603)
Summary of Contents for 21HS-50N
Page 12: ...12 21HS 50N CHASSIS LAYOUT Mother unit CRT unit ...
Page 27: ...27 21HS 50N ...
Page 31: ...31 21HS 50N SCHEMATIC DIAGRAM OF CRT F7341N0 00 Version 1 I H G F E D C B A 2 3 4 5 6 7 ...
Page 32: ...32 21HS 50N CRT UNIT BLOCK DIAGRAM 1 I H G F E D C B A 2 3 4 5 6 7 ...
Page 33: ...33 21HS 50N MOTHER UNIT BLOCK DIAGRAM 1 I H G F E D C B A 2 3 4 5 6 7 ...
Page 43: ...43 21HS 50N NOTES ...
