10-16
JK408
J318
R401
JK409
J319
R402
C27
J1023
JK410
J320
J1024
JK411
J321
J1025
JK412
J322
JK413
J323
J1028
J324
R601
J325
R602
J902 RCV
DET
J327
R1100
J328
J904
GND
R1101
J329
R1102
R1103
R609
R1108
J330
J331
J332
J333
R610
J334
R611
R805
CN401
J335
R612
R806
J336
R613
J337
R614
CN404
J338
R615
R1111
R421
J339
R616
R617
R1113
R425
R619
R427
R1117
R1118
J340
R429
J341
J342
J343
R620
J344
J346
J347
R624
J348
R431
J349
R433
CN801
CN802
R436
R438
J350
J351
J352
J353
J354
J355
J356
J357
R635
R441
J359
R636
R442
R637
R638
Q10
R639
R445
R447
J360
GND
J361
GND
C601
R449
FH601
C602
J362
GND
FH602
R640
C605
R641
C606
C607
C608
R644
C415
R451
C609
R646
R452
C417
R453
R454
C419
R455
R456
R457
C804
R458
C805
R459
C806
C612
C807
C613
C808
C614
C615
R651
R652
C616
C422
R653
C618
C619
R656
R463
R659
C812
C814
C621
C622
C623
R660
C430
R661
C626
R663
C628
C629
R471
R669
R476
R477
C630
C632
R670
C637
C639
R675
R676
C640
C641
Q101
Q102
R680
R682
C647
R684
R685
R686
Q301
R689
Q302
Q303
Q305
TU10
R690
D401
R691
D402
D403
D404
D405
D406
D407
R697
D408
D409
D601
D602
D603
D604
D410
D605
D411
D606
D607
D413
D608
D414
D609
D416
D418
D801
D419
D802
D803
D804
D610
D805
D806
D612
D613
D420
D615
D421
D616
D422
D617
D423
D618
D424
D619
D425
D426
D427
D620
D621
SW101
POWER
D622
SW102
CH.UP
D623
SW103
CH.DOWN
D624
SW104
MENU
T601
IC605
D625
SW105
VOL.UP
D626
VOL.DOWN
SW106
D627
D628
CN1001
D629
CN1002
IC801
D631
D632
D633
D634
C1001
D635
D636
C1002
D637
D638
D639
C1005
Q1001
C1006
Q1002
C1007
Q1003
C1008
Q1004
C1009
Q1006
Q1007
J400
GND
D640
Q1008
D641
Q1009
D642
D643
C1010
D644
R104
D645
C1011
D646
C1012
R106
C1013
D648
C1014
Q1010
C1015
Q1011
D649
Q1012
CN101B
Q1014
Q1015
C1019
Q1016
Q1017
Q1018
R110
D650
D651
R305
Q1019
R111
R112
D653
R113
R308
R114
R309
R115
R116
C1023
Q1020
R118
D1001
D1002
D1003
Q1023
C1027
D1004
Q1024
J228
D1005
R1001
Q1025
J229
D1006
R1002
D1007
R1003
D1008
D1009
R1006
R1007
R1008
J230
C1031
J231
J232
C1033
J233
D1010
J234
D1011
CN301
J235
CN302
D1012
J236
CN303
D1013
J237
D1014
R1010
J238
D1015
J239
D1016
R1012
R1013
R1014
D1018
D1019
D671
RS101
D672
R1017
D673
J240
J241
J242
J243
D1020
L10
J244
D1021
L11
J245
D1022
J246
D1023
J247
D1024
J248
D1025
J249
C101
D1026
D1027
D1028
D1029
R1026
C107
C108
R1029
J251
C109
J252
C1053
J253
D1030
C301
C1055
J255
D1031
J256
D1033
J257
R1030
D1034
C1058
J258
R1031
D1035
C1059
J259
R1032
D1036
R1033
D1038
R1034
D1039
J260
J261
J262
R157
D1040
J264
J265
D1041
C312
J267
J268
R11
D1045
J269
R12
R1044
C318
C319
J270
J271
R1049
T1002
J272
J273
J274
J275
J276
J277
J278
J279
CN152
J280
J281
J283
J286
SCART
CVBS
OUT
J287
J288
J289
R1065
R1066
J290
J291
J292
J293
J294
SA601
J295
J296
J297
J298
J299
R1074
D101
ST.BY
POW.
D102
D103
D104
D301
D302
Q401
R1091
R1092
R1093
R1094
Q404
R1095
Q405
R1096
Q406
R1097
AC601
D501
D502
D503
Q601
Q602
D506
Q603
Q604
D508
Q605
D509
Q606
Q607
L401
Q609
L402
L403
D510
D511
Q801
L405
Q802
L406
D513
Q803
L407
Q610
Q804
L408
Q611
Q612
Q613
Q614
L601
BC401
Q615
Q616
BC601
BC602
D151
J1003
GND
J300
ALL+3.3V
J1004
J301
J1005
J1006
J302
J1007
J303
J304
J305
J306
J307
J308
J309
J1010
C14
J1011
J1012
C16
J1013
C18
J310
JK401
C19
J1015
J311
JK402
J1016
J312
JK403
J1017
J313
JK404
J314
JK405
J315
JK406
J316
JK407
J317
BA0CN0F0101 2
B
BA0CN0F0101 2
A
P-ON-H2
P-ON+5V
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VCOM-PWM
VCOM-PWM
C1
2IN+
2IN+
PANEL+25V
+3.5V
+3.5V
BL-SW
BL-SW
P-ON/OFF
PANEL+13V
PANEL-6.8V
P-ON+3.3V
P-ON+3.3V
P-ON+3.3V
P-ON-H1
+15V
+15V
BL-ADJ
ALL+3.3V
ALL+3.3V
PON+11V
PON+11V
PON+11V
PON+11V
A-MUTE
SCART-OUT-SEL
VDACOUT1
AMP-R
AMP-L
+33V
GND
GND
GND
PCB STUD
PCB STUD
PROTECT
1
UVP
2
UVP
1
BL
ON+7.5V
BL
ON+7.5V
BL
ON+7.5V
PROTECT
3
P-ON/OFF
PROTECT
3
PROTECT
1
ON/OFF
H1
CVBS
VN
ON/OFF
H1
CVBS
L
SLOW
SW-IN
SIF
P
SIF
N
TU
CVBS
PROTECT
1
PROTECT
3
ALL+3.3V
GND
GND
TU
CVBS
CVBS
V
GND
SP-GND
+33V
POW
for
1.1V
GND
+3.5V
ON/OFF
H1
SPDIF
SLOW
SW-IN
GND
P-ON-H2
P-ON+5V
1
2
10
11
J358
SW601
J1026
J1027
J263
Q617
J410
R665
Q608
J411
D1046
J412
J1019
J1020
D611
D670
J250
C611
COLD
HOT
F
E
G
4
3
D
C
B
A
1
2
5
HOT
1
2
28
29
2
1
2
1
2
1
29
28
29
28
29
28
P
b
6
1
C21
C22
R403
R404
C24
R405
R406
R407
R408
R409
R410
R411
R412
R413
R1104
R415
R1105
R1106
R1107
R419
R801
R1109
R802
R803
R804
R807
R808
R1110
R809
R422
R1112
R423
R424
R1114
R1115
R426
R1116
R810
R428
R811
JS901
R812
JS902
R813
JS903
R814
R815
R816
R817
R818
R430
R625
R819
R626
R432
R627
R628
R629
R437
R820
R439
R823
R630
R824
C401
R825
R826
R827
C404
R440
C405
R829
C406
C407
R443
C408
R444
C409
R446
R448
R830
R831
C410
C411
R642
C412
R643
C413
R450
C414
C416
R648
C418
C801
R649
C802
C803
R650
C420
C809
C423
R654
C424
R461
R655
C425
C426
C427
R657
R464
C428
R658
C810
C811
C429
C813
R467
R468
R469
C815
C817
C819
C625
C431
C432
C433
R470
C434
C435
R666
R472
C436
R667
R473
C437
R668
C820
R474
C438
R475
C821
C439
C822
C823
R478
C824
C631
R479
C825
C440
R671
C441
C636
R672
C442
R673
C443
C638
R674
C444
R480
R481
C445
R482
C446
R677
R483
C447
R678
R484
C448
R485
C449
R486
R487
C642
C643
C644
C450
R681
C451
C646
R683
C648
R687
R688
R694
R695
R696
R698
IC402
C1003
C1004
Q1005
R101
R102
R103
R105
R107
R108
R109
CN101A
C1016
C1017
C1018
R301
R302
R303
R304
R306
R307
C1020
R117
C1024
R501
C1025
Q1022
C1026
R310
C1028
R311
CN101
R312
R313
R1004
R314
R1005
R318
IC1001
R319
IC1002
C1032
C1034
C1035
C1036
C1037
C1038
R320
R1011
C1039
R321
R322
R1015
R1016
R1018
C1040
R1019
C1041
C1042
C1043
C1044
C1045
C1047
R1020
C1048
R1021
C1049
R1022
C102
R1023
C103
R1024
C104
R1025
C105
C106
R1027
R1028
C1050
C1052
C1054
C302
C1056
C303
C1057
C304
C305
C306
C309
R1035
R1036
R1037
R1038
C1060
R1039
C501
R156
C502
C503
C310
C504
C311
C505
C313
C314
R1040
R10
C315
R1041
C316
R1042
C317
R1043
R13
R15
R1045
R16
R1046
R18
R1048
R19
C320
R20
R21
R1052
R22
R1053
R23
R1054
R24
R1055
R25
R1056
R26
R1057
R27
R28
R1058
R1059
R1060
R1061
R1067
R1068
R1069
R1070
R1071
C151
R1072
C152
R1073
C153
C154
C155
R1081
R1082
R1083
R1084
R1086
R1087
R1088
R1089
R1090
R1099
IC301
C10
C11
C12
C13
C15
C17
R417
R416
R604
R605
R606
R607
R119
R1121
R1120
R1119
C1061
R1122
R1123
R120
C506
JS611
JS612
H.V CAUTION
1
1
6
6
1
6
1
2
2
1
COLD
WF8
PIN 29 OF
CN404
WF9
PIN 28 OF
CN404
WF10
PIN 26 OF
CN404
WF1
PIN 2 OF
CN404
WF2
PIN 27 OF
CN401
WF3
PIN 29 OF
CN401
WF4
PIN 4 OF
CN404
WF5
PIN 6 OF
CN404
WF6
P I N 8 O F
CN404
WF7
PIN 22 OF
CN401
Main CBA, Function CBA & Junction CBA Bottom View
BA0CN0F01012
Junction CBA
Main CBA
Function CBA
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
Because a hot chassis ground is present in the power supply
circuit, an isolation transformer must be used when repairing.
Also, in order to have the ability to increase the input slowly,
when troubleshooting this type of power supply circuit,
a variable isolation transformer is required.
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
CAUTION !
For continued protection against fire hazard,
replace only with the same type fuse.
Summary of Contents for LT850-M19 - SERVICE
Page 13: ...4 2 A0CN0DC 2 Rear Cabinet 1 Stand Assembly S 3 S 2 S 2 S 2 S 2 S 2 S 4 S 4 S 1 Fig D1...
Page 36: ...10 4 A0CN0SCM2 Main 2 Schematic Diagram...
Page 37: ...10 5 A0CN0SCM3 Main 3 Schematic Diagram...
Page 38: ...10 6 A0CN0SCM4 Main 4 Schematic Diagram...
Page 39: ...10 7 A0CN0SCF Function Junction Schematic Diagram...
Page 70: ...LT850 M19 LT851 M19 A0CN0EP A0CN1EP 2010 05 25...
