DOWNLOAD Sharp 21HT-15 (serv.man8) Service Manual ↓ Size: 4.47 MB | Pages: 40 in PDF or view online for FREE

Model
21HT-15 (serv.man8)
Pages
40
Size
4.47 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / CTR
File
21ht-15-sm8.pdf
Date
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Sharp 21HT-15 (serv.man8) Service Manual ▷ View online

29
21HT-15H
 SCHEMATIC DIAGRAM OF CRT (F7341N0, 00 Version)
1
I
H
G
F
E
D
C
B
A
2
3
4
5
6
7
30
21HT-15H
CRT UNIT BLOCK DIAGRAM
1
I
H
G
F
E
D
C
B
A
2
3
4
5
6
7
31
21HT-15H
MOTHER UNIT BLOCK DIAGRAM
1
I
H
G
F
E
D
C
B
A
2
3
4
5
6
7
32
21HT-15H
TROUBLESHOOTING TABLES.
Check F701.
Blown out.
Abnormal
Normal
Replace the fuse.
Check R701 Q701.
Check T701 pin16 voltage.
The fuse is again blown out.
and IC701
(Approx. 290V at 220V AC)
Check IC701,D701,D702,
Normal
D703,D704 and C705.
Check Secondary Main+B.
Abnormal
(Approx. 11
0V)
Normal
            
YES
Check D758,IC702,IC753
Check CRT connector K1-
D1001 (Power LED Bright Red)
and D762.
K5 bias.
turns on.
        NO
Normal
Normal
Abnormal
                 NO
          D1001 (Power LED Dark Red)
Check R615.
Check
Check
turns on 
C878.
IC801.
     Checking the
D1001 turns on
     protector circuit.
brightly and darkly.
          (Bus error)
NVM
(IC1002)
See many often D1001
TV PROCESSOR
flashes in red.
(IC801)
This indicates which IC to 
check up.
TUNER
(TU201)
NO RASTER
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