DOWNLOAD Sharp 28HW-53 (serv.man9) Service Manual ↓ Size: 4.65 MB | Pages: 44 in PDF or view online for FREE

Model
28HW-53 (serv.man9)
Pages
44
Size
4.65 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / CTR
File
28hw-53-sm9.pdf
Date

Sharp 28HW-53 (serv.man9) Service Manual ▷ View online

10
28HW-53H
Contrast Adjustments
Three types of contrast levels can be varied as listed be-
low:
• TELETEXT MIX MODE CONTRAST
• TELETEXT CONTRAST
• OSD CONTRAST
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
DVCO Adjustment (PAL)
Carry out the DVCO Adjustment (PAL) as shown below:
1.
Receive a Phillips pattern signal.
2.
While in the DVCO ADJUSTMENT (PAL) menu, press
the standby button.
3.
The adjustment will be carried out automatically and
stored.
DVCO Adjustment (NTSC)
No adjustment required.
Auto Installation On/Off
To return the receiver to the original Auto Installation mode,
using the volume up or down button, set the Auto Installa-
tion On/Off to On. This setting is automatically stored and
when the receiver is turned on the next time it will start up in
Auto Installation mode.
AGC Adjustment
To correctly align the Automatic Gain Control, follow the
procedure outlined below:
1. Tune the set into a pattern generator on CH10.
2. Adjust the signal strength of the pattern generator to 57uV
3. Enter the service mode.
4. Enter the AGC Adjustment menu.
5. Press the standby button on the remote control.
6. The adjustment will be carried out and stored
automatically.
AFT Adjustment
To correctly align the Automatic Fine Tune, follow the
procedure outlined below:
1. Tune the set into a pattern generator on CH69.
2. Enter the service mode.
3. Enter the AFT Adjustment menu.
4. Press the standby button on the remote control.
5. The adjustment will be carried out and stored
automatically.
LED FLASHING CODES
This model is not provided with stereo led, so to let “flashing
codes” for IC failures detection when the TV set does not
work, we have answered with the next solution:
• The detection of failure will be made with an external LED.
• The output of the flashing code will be via AV1 (pin 12).
• Insert a generic led diode between pin 12 and ground (i.e.
pin 5, 13 or 21) as shows the below picture.
Follow the sequence according to the information below, as
a guide to fault finding.
1. Unable to read or write into NVM: 66% ON, 33% OFF
twice and OFF for a second.
2.  MSP failure:  66% ON, 33% OFF for three times and
OFF for a second.
3. VDP failure: 66% ON, 33% OFF for four times and OFF
for a second.
NOTE:
If you want to check that the system is working, open resis-
tor R307 to avoid I
2
C comunication with MSP. The TV set
will flash three times and OFF for a second, showing MSP
failure.
Then the system is working properly.
21
21
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
On        Off
On        Off
On        Off
11
28HW-53H
22
23
24
25
17
18
19
20
21
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
Y
X
0
1
2
3
4
5
6
7
8
R6701
C6701
(CC)
(FV)
C6428
L6318
(SS)
3
1
(HD)
R6317
R6316
L6317
CN4
J401
S6702
S6703
S6704
S6705
1
2
3
4
C6746
(A)
1
2
C6429
C6337
C6336
JF3
R6449
JF2
JF1
3
2
1
(H)
F6701
C6702
C6703
C6704
C6705
(SW1)
(SW2)
(RC)
LP6701
R6702
L6701
A
S6701
F7342BMN1
FRONTAL POWER SWITCH / AV  UNIT (F7342N1) PWB.
Component  Side
Copper Side
Y
X
22
23
24
25
17
18
19
20
21
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
0
9
8
7
6
5
4
3
2
1
R6701
C6701
(CC)
(FV)
C6428
L6318
(SS)
(HD)
R6317
R6316
L6317
71
3
5
62
4
CN4
J401
T3.15AH
ESPA¥A
IC6701
S6702
S6703
S6704
S6705
12
34
C6746
1
2
(A)
C6429
C6337
C6336
JF3
R6449
JF2
JF1
(H)
3
2
1
F6701
C6702
C6703
C6704
C6705
(SW1)
(SW2)
(RC)
LP6701
1
3
(AA)
R6702
L6701
K7342BM
F7342BMN1
A
THE "        " SYMBOL
CAUTION
THE ACTIVE SECTION
IS INDICATED WITH
S6701
12
28HW-53H
Page 13
MOTHER UNIT PRINTED WIRING BOARD. Component side.
22
23
24
25
17
18
19
20
21
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
Y
X
0
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
JL40.
E
Q718
B
C748
IC704
C651
C652
A
F7241BMN7
K7241
JF63
J363
+
C1823
C
Q912
E
+
C1807
JF65
(H).
C1826
J362
C1825
+
C1824
D1815
D1813
D1814
R1833
R1831
R1835
R1801
JF64
JF66
ESPA¥A
1
9
IC1801
(K).
+
C1811
+
C703
D701
C704
R564
JF61
R703
R563
R518
C648
FB603
R604
JF55
D611
(EW)
JF56
JF57
L703
C746
D708
+
C724
D707
C702
(G)
2
1
JF54
JF53
L705
FB705
JF28
J86
J85
R727
D714
F601
F602
C618
C611A
JL17
R763
D516
J288
J300
1
(MO)
4
(L5)
FB701
R713 R730
(L4)
(ST)
(OPC)
(RC)
(SW2)
(SW1)
R628
R608
J320
J100
JL1
R611A
D719
R610
C619
+
+ C620
+
C528
R606
R617
C607
+
D612
(AV).
R408
JL14.
J284
1
3
(PW)
C504
R553
L604
R603
J316
JF29
C634
D609
JF8
JF9
D608
M1000
R792
J10
R741
C616
+
J101
J134
D610
R616
J174
J175
J176
J177
R533
+
C
J4
CF701
1
THE "        "SYMBOL
CAUTION
THE ACTIVE SECTION
IS INDICATED WITH
E
Q711
C
T3.15AH
C615
J173
C610
R613
+
C719
R728
J99
J33
C718
+
R624
J172
R609
R641
D606
R623
D621
L606
J171
Q605
JF1
QKI
DIP
(L2)
IC1008
J6
J5
R714
C705
D712
R716
J178
JF10
J211
C613
D613
R612
FB601
D603
C601
D604
D605
1
(CW)
1
2
3
4
S701
S
D
G
20
21
21
20
S705
S704
D1001
D1002
LP701
S703
S702
18
10
9
1
T701
1
2
3
4
5
6
7
8
9
10
11
12
T601
MODULO_DIGITAL
6
12
Q701
L701
B
Q602
E
Q601
B
C
E
(F)
1
2
3
4
5
J208
J209
J210
R791
R790
C706
+
IC706
R742
R1036
IC501
20
J69
D711
FB702
C711
C714
L603
R50
L609
J207
L609A
C770
D718
L502
TP601
TP602
K7240BM
+
C707
+
C526
1
2
3
(A)
+
C509
R643
R503
FB501
C642
C611
C641
+
C723
+
C501
JL2
C631
C720
+
D720
C713
FB1002
JF48
J326
5
(H)
R536
C638
L612
C637
R614
L611
(AA)
3
1
C701
F701
FB704
FB703
D722
J321
C721
+
J317
R619
JF51
JF50
L605
(STB2)
1
5
POR701
L702
IC701
J17
D731
D734
R721
R778
R771
J344
+
C739
R770
D623
J133
D735
J358
R651
J306
D702
(L6)
R715
C710
D716
R723
J68
J67
IC705
D703
D704
F702
IC703
J366
C632
JF73
VR1801
13
28HW-53H
MOTHER UNIT PRINTED WIRING BOARD. Component side.
Page 12
Y
X
22
23
24
25
17
18
19
20
21
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
29
30
31
32
33
20
21
22
23
24
25
26
27
28
17
18
19
J368
+
C815
(STB1)
JL17.
E
Q502
B
R565
K7241BM
C1826
2
5
+
C1824
D1809
5
1813
1814
1833
1831
1835
(L3)
5
6
7
8
9
10
11
12
GND
TRC
L1801
C1812
+
R1832
R1834
R1836
C1814
(G2)
GND
JL12.
1
+
C415
JL12
(CV1)
C426
+
L203
(CC)
1
R471
R653
J136
R534
R508
J359
R563
JL14
(K)
9
1
R815
J228
J234
+
C804
R814
JL27
JL26
JL28
JL10
C305
+
+
C306
C381
C356
R650
A
A
1
(VS)
3
+
C377
JL11.
X1002
J288
J300
C353
J62
+
C1027
JL1.
C1032
+
J24
JL12,,
C644
+
R530
J183
D622
R234
X301
J170
1
(SS)
3
+
C229
J271
R1055
J44
L1002
L1001
J309
J201
J199
IC302
10
11
R526
R550
J90
R1008
J91
JF31
J60
L316
L315
J27
R1050
R618
J297
J116
J94
GND
GND
FB302
JL15
+
C437
C812
1
+
C818
+
R230
J303
JL11..
C1031
+
JL6.
R436
J177
R533
J249
J64
J314
+
C511
C524
C821
R231
C820
J221
J222
J241
J242
J32
J305
J31
R1047
J45
J46
L301
J14
J13
J12
C332
+
J301
C205
+
C204
J225
C209
+
R232
R233
C228
J280
R426
R419
J216
15
+
JF19
C514
J137
C365
+
J401
J47
C376
KITP7240BMN7
ESPA¥A
F7240BMN7
(YA)
(YB)
(YC)
J141
J143
J144
J153
J154
J155
J142
C431
C430
J145
J189
+
C210
J160
J161
J162
J151
L803
C343
+
R455
J246
L317
J9
J8
J191
+
C313
+
C314
+
C311
L201
J169
C324
C325
C315+
C326
+
C329
IC1002
12
6
1
(SA)
(SB)
16
L351
L350
IC203
C215
+
J275
J278
5
1
SF203
+
C206
CF202
1
J230
J131
+
IC301
1
10
20
52
27
26
1
IC2401
J274
J178
L503
J179
211
R425
R424
1
2
2
1
(AV)
CN3
4
2
6
5
3
1
7
TH201
AGC
TU
AS
CL
DA
B+
33V
IF1
IF2
1
6
12
6
1
12
6
1
L501
FB301
J265
J266
+
C218
64
33
32
1
IC305
J129
J128
8
1
IC304
C358
IC801
1
32
33
64
J232
J231
5
1
SF201
SF202
15
R306
R307
C220
+
J168
J167
J166
J165
J164
J147
J146
+
C211
J163
JF14
JF6
C322
C323
J157
J48
J49
J50
R501
+
C520
D510
J156
J152
J253
+
C219
J63
J251
J236
R451
J250
J74
J118
J95
J92
J41
J40
R1027
FB303
J252
TP701
TP201
1 (FV)
(FV).
1
J203
J223
C362
J39
J117
J61
J72
J75
JL7
J243
J206
R420
J312
J138
J139
JF32
JF33
JF34
JF35
J318
J113
J114
J115
L2401
L2402
J88
J106
J194
J193
J192
(RGB)
J42
J28
J224
C501
JL12,
C822
J322
JL2.
J159
+
C342
J71
J311
J119
J140
R229
R620
X2401
J212
R519
J190
J185
J180
JL11
C1001
+
+
C825
J248
J260
C536
+
J87
R359
C361
+
C363
L352
+
C351
C352
+
C372
JL6
J78
J79
J80
J81
J82
IC1005
1
3
J93
L318
J130
R315
C341
1
(HD)
3
4
(S)
1
J255
C422
+
R418
R464
+
C433
J331
1
AV
(RT)
J304
R1022
J270
J269
J323
J343
JL2..
50Hz
50Hz
1
(STB3)
R1058
R1059
R1018
(L2)
JL19
R1064
D623
C368
L353
+
C378
C382
C370
J30
C373
D206
JL18
J347
J348
J349
JL29
JL29.
JL27.
JL26.
JL28.
J307
J214
L801
+
C802
J319
D803
JL31.
JL31
R379
R380
R381
R382
F702
JF40
JL7.
JL10.
R541
J150
J187
JF67
L804
JL40
JF73
1801
J43
J121
J122
J120
(SC)
(CENTRAL)
J357
J127
J367
X801
JL2
J83
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