Circuit Diagrams; Main Pwb Circuit Diagram - JVC LT-26A70BJ Service Manual

CIRCUIT DIAGRAMS

MAIN PWB CIRCUIT DIAGRAM (1/4) SHEET1
TU 1 U/V TUNER
R27
C253
100k
TU_AGC OPEN
SHEET 3
TU_AGC
R8
C200
220k
GND
GND 5V0
GND
L39
C149 C130
.01/16
GND
TU_AFT
SHEET 3
TU_AFT
5V0
Q17
C88 NPN R238
.1/16 100
GND
R37
C92 OPEN
.1/16
TU_CVBS
SHEET 4
TU_CVBS
R296
GND
0
R297
820
GND
C256
.01/16
8V0
R240
0
R312 R314
C305
2.2k 680
JP3
OPEN
R90 R310
1k 330
GND
SHEET 3
RESET_L
SCL3
SHEET 3,4 SCL3
SDA3
SHEET 3,4
SDA3
SCL5
SHEET 2,3,4
SDA5
MAIN PWB ASS'Y(1/4)
SFT-1051A-U2 [LT-26A70BJ, LT-26A70BU, LT-26A70SJ, LT-26A70SU]
SFT-1052A-U2 [LT-32A70BJ, LT-32A70BU, LT-32A70GU, LT-32A70SJ, LT-32A70SU]
GND
GND
GND
R293
100k
BT32V
GND
GND
R308 D57
100k OPEN
C94
GND GND
GND
SDA5
SCL5
GND
5V0
C150
R59
100/16
10
R237
100
Q18
NPN
C89
R239
.1/16
100
R82 C183
1k 4700p
5V0
L16
R313 R316
2.2k 270
Q26
NPN C203
JP1
OPEN
C304 C291 L38
R94
820p 47p
1k
Q28
NPN C255
C91
R326 .01/16
.1/16
180 SIF
Q27
R317
NPN JP2 C257 47p
47
OPEN
C258 47p
C343
C289 OPEN
C259
.01/16
C290 R292
1p
.01/16 1k
C260 R20
100
1p
X3
R138
4.7k
GND
R83
1k
GND
RESET_L
R241
100
SCL5
RESET_L
C261
33p
3V3_SB 5V0_SB
R242
100
SDA5
R211
R140 4.7k
4.7k
C262
33p
SCL5
Q7
3V3_SB 5V0_SB
R139 R213
4.7k 4.7k
SDA5
Q6
SCL5
SDA5
TP1 TP2
OPEN OPEN
GND GND
R602
FB50 FB61 1K
GND
SP.GND SP.GND
5V0_SB
FB40 FB62
R619
OPEN
GND
SP.GND SP.GND
FB46 FB63
D605
R620
OPEN
OPEN
D606
Q608
OPEN
GND OPEN
SP.GND SP.GND
FB10 FB64
GND
SP.GND SP.GND
5V0 8V0
FB39 FB65
Y607 Y608
OPEN 0
SP.GND GND SP.GND
D601
Q607
PNP
R616
100k R626
56k
C202
GND
C133
.01/16
8V0
L17
C132
.01/16
C201 C190 C204
1000p 10/16
C206
10/16 C231 330p
C229 330p
C205
10/16
R248 100 SC1_AL_OUT
R247 100 SC1_AR_OUT
R246 100 SC2_AL_OUT
IC11
R245 100 SC2_AR_OUT
AUDIO
C230 330p
SIGNAL
SELECT
& C228 330p
DSP
C266 3900p
C240 1/16 SP_L
C241 1/16 SP_R
C265 3900p
HP_L
C264 6800p
C263 6800p
HP_R
C90
GND .1/16
GND
L15 C131 C235
.01/16 47/16
GND
5V0
GND
GND
HP_SW
SHEET 2 SHEET 4
(No.YA492)2-7 2-8(No.YA492)
L603
SP_VCC
C622
C625 0.33
.1/25
C624
0.22
L604
C626
C623
IC601 0.22
POWER AMP
SP.GND
GND
R601 C603 C605
1K 1/16 1/16
IC601
Q601 Q602
C604 C606
OPEN OPEN
1/16 1/16
R605
R621 GND GND GND
OPEN OPEN
R622 R606
SP.GND
OPEN OPEN
R608
100K
Q610 Q606
Q609 OPEN OPEN
OPEN
R623 R617
SP.GND SP.GND SP.GND
OPEN OPEN
Y601 Y602 Y603
C609 C610
OPEN OPEN OPEN
.22/16 .22/16
L601
GND GND GND
R607
100K
5V0_SB
C611
.33/25
SP.GND
L602
R618 R612
10k 100K
R613
D603 12k
D602
R614
2.7k
Q604
NPN
Q603
NPN
D604
GND GND
R615
2.7k
Q605
NPN
SP.GND
GND
5V0
5V0
D302
Q39
PNP
R328
R331 C342
47k
100k 100/16
R344 D303
56k R327
0
GND
R249 Q37 R330
4.7k PNP 0
HP_SW
C338
D301
1/10
Q38
R329
100k
GND
C152
C146
R284 R303
1/10
0 22
HP_R
R89
R54 C339 1k
OPEN C273
.0022
.1/50
GND
R55 C340
GND
OPEN .0022
R88
1k
C272
C238
C147 .1/50
R285 100/16
1/10
0
HP_L
C337
R302
47/16
22
C151
GND
C621
.22
SP.GND
C620
.22
SP.GND
SP_VCC
Y613 Y614
0 0
C619
1/25
C618
CN0LR
C617
1/16
SPEAKER
C616
1/16
SP.GND
C615
GND
C614
SP_VCC 1/25
Y611 Y612
0 0
C612
.22/16
SP.GND
C613
.22/16
SP.GND
SP_VCC
GND
S_PWR
SHEET 3
S_MUTE
SHEET 2,3
A_MUTE
C303
100p
GND
CN00R
FB22
FB36 CONTROL PWB
FB37
CN70R
GND
SHEET 6
FB23
FB24
C302
100p
C301
100p
GND
KEYA
KEYA
KEYB
KEYB
SHEET 3
HP_DET
HP_DET
c10496001a001_1106_1/4_0.0