JVC MX J270V Schematic
Block diagram
MX-J270V
HEAD
PHONE
BOARD
FW851
5
4
ANTENNA TERMINAL
AM
FM
MAIN BOARD
AM
L2
COIL BLOCK
JA1
RF IN
TU1 FM
TUNER PACK
1
IF OUT
13
17
18
19
T2
23 21
IC1 FM AM IF/DET/MPX
24
CF1
Q1
AM IF
FM IF
AF
CF2
AMP
TRAP
114KHz
CN306
MIC/HEADPHONE
CN305
14
3
IC101 POWER AMP
1
3
IC307 BASS BOOST AMP
3
CN701
CONTROL BOARD
CN702
FW705
FW704
FW705
FW704
CN305
CN307
CN302
5
4
2
3 1
MIC
FW852
CN301
JA303
24
31
INPUT
SOURCE SELECT
IC302
TO SPK
RY901
IC306 VOL.AMP&EQ
LINE OUT
2
IC701
FL DISPLAY
CN700
FW703
FW702
FW701
FW703
FW702
FW701
SW. BOARDS
CASSETTE BOARD
CN306
CN309
CN651
CN152
CN151
CD SERVO BOARD
AUX IN
CN304 CN303 CN311
CN312
CN601
CN602
DSP BOARD
CN101
VIDEO CD BOARD
VIDEO BOARD
CN102
CN103
O/P
VIDEO
CN310
1
ABC
2-1
MX-J270V
Standard schematic diagrams
Power supply section
5
4
3
Version:U/UX/US
SHEET 2/8
FW999
S1
S1
S1
S2
S3
S3
S2/S3
S4
S4
S4
1
2
3
4
5
6
7
8
9
10
AC110V
3
1
7
5
6
2
4
F998 T 1.25A
F997
8
T 1.25A
1
AC127V
5
3
7
4
8
9
10
11
12
13
14 2
15
16
17
Th-Fuse
6
8
2
AC 110V / 127V / 220V / 230-240V 50Hz/60Hz
7
1
3
4
6
5
T999
TRANSFORMER
AC220V
5
3
1
7
4
5
3
1
7
4
F996 T 800mA
AC230-240V
5
6
8
2
3
6
1
8
2
7
4
F999
T 1.6A
6
8
2
S999
VOLT.-SEL
Mains
Plug
2
1
2-2
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified.
SHEET 1/8
ABCD
MX-J270V
Main section
1
+B
2
MIC
3
AG
TO MIC SECTION
L-CH
SHEET 8/8
CN301
JA301
AUX INPUT
R-CH
JA302
GND
REC-L
NC
REC-R
SW8V
PB-L
AG
PB-R
MSI
MB
MG
AM-IN
AM-G
FM-IN
ANT-TERMINAL
FM-G
L-CH
D301
1SS133
D302
1SS133
C301
0.001
R-CH
REC-OUT
D332
1SS133
Q302
CN302
R106 1K
1
2
R206
3
4
5
6
7
8
9
10
JA1
5
4
TO TAPE PCB
SHEET 4/8
3
DTA114ES
L302
10uH
+
1SS133
D6
16V1000
C303
R101
L301
F.B
R103 220
C101
C201
R203
R301 100K
D303
1SS133
1K
D305 1SS133
1SS133
D5
43K
C151
47P
R102 27K
D3111SS133
DTC114ES
Q306
DTC114ES
D310
C204 25V10
Q307
Q305
DTC114ES
+
1SS133
47P
C251
27K
43K
R202
R201
R104
2.2K
Q101
2SC3576
220P
R105
4.7K
R205
4.7K
Q201
2SC3576
220P
R204 2.2K
Q301
220
DTA114ES
+
10V100
1SS133
C302
D304
1SS133
C102
+
50V1
Q102
2SC3576
1N4003
R107
4.7K
D306
R207
4.7K
Q202
2SC3576
+
50V1
C202
D3
TU1 FM FRONT END
D4 1SS133
16V47
1K
+
R309 10K
R308 10K
R310
C308
-LED
TAPE
FAUX
R108
47K
4.3K
R109
4
G
+
IC301
-
BA15218N
R208
567
47K
R209
4.3K
1.5K
+
10V100
C305
R303
-
+
D307 M TZ5.1JA
R110 15K
123
VCC
8
R210
15K
+
10V100
C304
C103
+
25V10
R112
100K
R212
100K
C203
+
25V10
R302 220
RF-IN1GND2GND3+B4VT5OSC-OUT6GND7IF-OUT
1SS133
1SS133
1SS133
D8
D7
C1
0.1
FLAME GND
1K
R51
2
1SS133
0.001
0.001
D1
D2
C36
C37
C24
0.01
C54
1-TF
C55
+
3.3K
4.7K
0.0039
16V47
R52
R53
C53
20
19
22
21
C51
12P
XT
LPFI
GND
LPFO
XTI1FM2CE3DI4CLOCK5DO6VCOSTOP7AM/FM8LW9MW10SDIN
1K
R60 1K
R59
C63
100P
D51
1SS133
SDATA
PERIOD
C52
12P
Q51
DTA114YS
X1
VCX5044-001
C62 150P
+
10V100
R2 27
C2 0.1
C3
47PF
C64
R54
1.8K
C56
R55 4.7K
16
17
18
15NC14
PD
VCC
FMIN
AMIN
1K
R61
100K
R63
R64
SCK
R1 1K
C57
C58
0.001
0.01
0.01
47K
+
330
2.2K
C59
R57
10V100
R56
12
13
L51
220uH
IFIN
IFCNT
R58
10K
C60
150P
IC2 LC72136
11
R70 10K
R307 10K
R111
R211 470
Q303
DTA114ES
8
R6
R8
C104 25V10
C105
C106
C107
CF1
C5 0.01
470K
330
CF2
VCF2L3B-113
+
25V10
+
25V10
+
25V10
+
5
6
7
8
Y34Y1
VSS
VEE
INHI
CNT B9CNT A10X311X012X13X114X215VDD
+
C207
C206
25V10
25V10
D309
1SS133
R306 10K
Q304
DTC114ES
D308
1SS133
FTU
470
Q103
2SC3576
R113
4.7K
R213
4.7K
Q203
2SC3576
R304
1K
+
C306
16V47
L2 MW Block Coil
0.047
C9
VCF2L3B-113
R5 330
C6 0.001
Q1
2SC1923(O)
R7
56
C16 0.047
1
SHEET 7/8
TO DSP PCB
SCK
DSPSTB
DSPRESET
FTU
D.GND
SDATA
CN303
2
3
Y
Y01Y2
IC302 4052
16
+
+
C205
25V10
FTU
SDATA
DSPSTB
R115 4.3K
R114
47K
SCK
567
47K
R214
1234567
-
+
+
-
4.3K
R216
11K
R215
+
R305 220
C307 10V100
R342
2.2M
C331
33P
Q313
KTC3199
C330
0.015-M
1K
100K
0.047
10P
R9
C8
C7
R10
R17
+
C11
25V10
C10
0.047
TA2057N
IC1
10V100
R13 100K
C12
C17
270
VQF1Z2Z-115
T2
VQT7A21-111
CF3
22
23
21
24
20
VST
QUAD
FMIFIN
AMIFIN
MIXOUTAM
AMRF1AMSENS2FMSENS3AMOSC4OSCAM5VCC6AGC7GND8IFOUT9TUIND10STIND11ROUT
+
10K
R12 5.6K
C13
R11
SHEET 7/8
TO DSP PCB
A.GND
RIN
LIN5VA.GND
MIC
DSPL
DSPR
CN304
1234567
R118 470
R117 47K
+
C108
25V10
R218
470
R116
11K
123G4
IC303
BA15218N
VCC
+
C209
+
25V10
7
4
6
VSS
CNT B5CNT C
I/O C8O/I C9O/I D10I/O D11CNT D12CNT A13VDD
C109
25V10
R120 2.4K
R119 3.3K
2
O/I B3I/O B
8
+
2.4K
C210
25V10
R220
R219 3.3K
+
C208
25V10
47K
R217
R344
C332
0.0018
R343 22
R28 1.5K
C4
68P
0.01
C19
C20
18
19
FMOUT
AMOUT
+
0.01
C14
Q308
DTC114ES
+
C319
R314
16V47
47K
Q314
KTC3199
100K
10K
R313
MSIN
+
C334 50V1
680P
100K
1SS133
C333
R345
D322
0.01
R18
R19 27K
0.033
16
15
17
LPF1
LPF2
MPXIN
15P
C34
25V10
R14 10K
27K
14
VCO
R16 1K
50V0.1
+
C22
50V3.3
+
13
12
10K
R15
LOUT
C18
CF4
150P
C15
C21 0.01
CMU2-456A05
R23 3.9K
C25
0.039
C27
+
+
C28 50V1
C26
0.039
R22
3.9K
MPX
+
R20 22K
50V1
4.3K
R123
22K
R122
+
+
C111
25V10
C110
25V10
R121
4.7K
I/O A1O/I A
+
IC304
4066
-
R221
4.7K
14
+
25V10
C211
R222 22K
4.3K
R223
10V47
1.5K
+
+
R312 220
C321
R349
C311 10V100
C23
50V0.47
10K
10K
C30
R151
R251
470P
C29
470P
2.2K
R27 2.2K
R26
5.6K
R25 5.6K
R24
C31
0.01
L1 F.B
TP-GND
TP-L
C113
25V10
+
R124
4.7K
C112
470P
-
+
6
7
C212
470P
4.7K
R224
MTZ5.1JA
D330
R1622.7K
+
25V10
C312
32
123G45
IC305
BA15218N
VCC
8
+
2.7K
C213
25V10
R262
R311 220
TP-R
PERIOD
R67
MPX
SCK
R66 2.2K
SDATA
R65 1K
C118 470P
R125
+
IN231RIP
10K
C114 25V10
C115 0.047-M
29
30
NF2
28
27
BIN2
BVN2
BVO2
IC306 BH3854
C116 0.039-M
26
TIN2
C117 0.01-M
24
TVO225OUT2
180K
50V4.7
R315
50V4.7
50V4.7
R316 330K
+
+
+
C315
C314
C313
20
23
21
19
22
TC
VC
BC
CLK
DATA
GND1IN12NF13BVN14BIN15BVO16TIN17TVO18OUT19VCC10SC11PORT112PORT213PORT3
14
C216 0.039-M
C217 0.01-M
1SS133
D323
12345678910111213
DG
FL1
FL2
-35V
+
C339
50V0.22
Q315 KTC3199
C335
SCK
MCLK
MSTAT
SDATA
10V100
100K
R322
C320
0.022
+
R348
6V
NC
MCMD
SAFETY
+
25V10
C215 0.047-M
C214
R225
10K
C218 470P
C337
+
50V47
2.2K
1SS133
D53
CN306
C316 150P
R323 5.6K
FAUX
SHEET 3/8
+
C318
C317
10V100
R317
17
18
1K
2.2K
VREF
LATCH
R319
R320
PORT415VSS
D313 1SS133
16
LATCH
DATA
C219
0.12-M
R346 470
R347 10K
3.3K
D324 1SS133
1142153164175678910111213
OSD
MPX
OSCS
MSIN
OSCK
OSDATA
TAPE LED
SHEET 3/8
C119 0.12-M
0.022
R318
120K
R321
D314 1SS133
SCK
DSPSTB
MRESET
8.2K
R129
R127
2.2K
R128
C120
220K
1K
C121
+
10V100
0.12-M
R126
120K
4
123
G
-
+
+
IC307
-
BA15218N
567
10V100
2.2K
8.2K
R229
VCC
8
C221
+
R228
KTC3199
R226
120K
C220
0.12-M
R227
+
D315
MTZ5.1JA
R325 1.5K
C322 16V47
R324 100
Q913
2SA1175
Q914
KTC3199
MTZ3.9JAT
D916
1K
+
+
R930
C922 16V22
220
R350 220
R351
CN307
PRI
SPK
FTU
POUT
MRDY
LATCH
SMUTE
PERIOD
OSD
P.ON
SHEET 5/8
KTC3199
2.2K
C921 25V4.7
OSDATA
Q104
2.2K
Q204
R130
10K
C122
25V10
+
R131
R231
+
C222
25V10
+
C347
16V47
R230 10K
39 UNF.RES (1/4W)
R929 100K
FTU
220
R352 220
R353
12345
CN308
OSCS
OSCK
D317
R327
120K
1SS133
ST-BY GND1IN -2IN +3IN + MUTE4N.C5BOOST6VDD-PRE7VSS-PRE8ST-BY9MUTE10N.C11N.C12VDD-OUT13OUTPUT14VSS-OUT
R133
50V2.2(BP)
4.7K
C123
2.2K
R132
8.2K
8.2K
R326 22K
+
100
R928
D326
16V22
C920
1N4003
R134
4.7K
2.2K
R232
R233
4.7K
D316
1SS133
+
25V10
C360
R927
POUT
10V100
+
C919
R261
+
C340
10V470
C341
+
10V1000
C348
0.047
2SC3576
4.7K
R234
Q205 2SC3576 Q105
C223
50V2.2(BP)
+
C917
D914
50V22
4.7K
4.7K
R921
R922
Q909
KTC3199
R920
2.2K
5.6K
2.2K
C918
0.01
R926
R925
47K
R923
D915
MTZ5.6JAT
27K
4.7K
4.7K
R161
R260
50V3.3
+
+
C240
C140 50V3.3
+8V
+8V
OUT.R
OUT.L
D.GND
D.GND
A.GND
A.GND
M.GND
M.GND
SHEET 5/8
R135 100K
R235 100K
MTZ9.1JA
C916
220P
R160
BU5V
100P
C124
C224 100P
1
Q912
F.B
L303
27K
C342
BU5V
+
+
2
IN -
ST-BY GND
R919 4.7K
KTC3199
Q910
2SB1375
D327
L304
6.3V470
+
R939 220
TX
MCS
MRESET
R136
R236
MCLK
560
C126
C226
560
3
IN +
1N4003
220
R940
MRDY
C125
R137 82K
16V47
16V47
R237
C225
4
IN + MUTE
1K
R918
+
R924 680
Q911
F.B
220
R941
11421531641751861978910111213
MCMD
MSTAT
100P
C127 10P
R138
100K
R238
100K
C227
100P
5
N.C
Q908
KTC3199
C915
25V10
KTC3199
3.3 UNF.RES (1/4W)
220
R942
CN309
R912
R917
6
10P
BOOST
6.8K
470
50V22
0.015-M
C228
0.015-M
82K
C229
50V22
C129
C128
7
R936
IC101
+
+
8
VDD-PRE
Q904
2SB1375
R916 330
VSS-PRE
9
ST-BY
330
R915
1-MLC
C927
L901 10uH
TDA7295
R140
R139
+
C323
+
R239
1.2K
R240
1K
10
N.C11N.C
MUTE
R908
R909
R910
Q906
DTA144TS
R913
R914
+
C926 6.3V470
3
OUT
IC901 7805
CN310
SHEET 6/8
1K
1.2K
50V10
C324
12
910
DTC144TS
750
C930 120P
50V10
Q907
2
GND
6
Y.OUT
D318
13
VDD-OUT
1
1
1
2SA1175
R911
0.01
C925
1
L305 F.B
C.OUT
IN
5V
15
L101
R142
10 UNF.C (1/4W)
R328
1N4003
R329
10 UNF.C (1/4W)
R242
L201
14
15
OUTPUT
VSS-OUT
Q905
820
+
50V2.2
C923
C343
6.3V4700
+
C344 0.01
12345
5V
D.GND
D.GND
D101
1SS133
0.22 UNF.M.F. (1/2W)
R145
22K
10 UNF.C (1/4W)
1K
10 UNF.C (1/4W)
0.22 UNF.M.F. (1/2W)
R245
IC201
TDA7295
R907 470
D913 1SS133
4.7K
R934
4.7K
R935
Q916
2SB1375
CD/AUDIO signal
FM/TUNER signal
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified.
MAIN signal
VIDEO/CD signal
D201
1SS133
R331
0.1-M
C130
C131
R144
R244
0.1-M
C231
C230
0.1-M
Q316
DTA114ES
C336
25V10
470K
0.1-M
+
820
R933
10K
R932
1SS133
Q915
DTC114ES
L306
D319
C325
+
50V0.47
56K
+
50V1
R330
C326
3K
56K
R147
R247
100K
R246
R146
100K
Q309
R334
C329
R335
22K
KTA1267
R333
100K
Q311
KTC3199
100K
+
C327
16V47
R332
C328
16V22
10K
D320
1SS133
50V1
+
10K
R336
L307
F.B
+
C905
50V2200
RELAY
RY901
MTZ24C
D321
1K UNF.C (1W)
R338
R248680 UNF.C (1/4W)R249
R148
R339
1K UNF.C (1W)
D901
KTC3199
R337 1.2K
820
1N5401
680 UNF.C (1/4W)
R250
R149 820
0.068-M
C901
KTA1267
R341 10K
R355 22K
10K
Q312
Q318
DTC114TS
1SS133
2SC3576
10K
R150
C903
D331
Q106
Q206
2SC3576
0.068-M
Q310
+
1N5401
L +
L -
R -
TO SPEAKERS
R +
JA303
SP-TERMINAL
CN305
SHEET 8/8
TO HEADPHONE PCB
4
SPK-SW
3
R-OUT
2
GND
1
L-OUT
EP901
GND
D903
+
C906
D904
C904
0.068-M
C902
1N5401
Q317
DTA114ES
+
C336A
25V10
D325 1SS133
PRI
SMUTE
F.B
50V2200
+
C908
C907
0.1-M
25V3300
C910
D908
63V47
1N4003
+
C911
50V22
+
R903
2.2K
D909
MTZ33JCT
R904 100K
+
C909 50V22
1K
Q903
R906
DTC114YS
SPK
CN311
1
VIDEO
2
V.GND
D906
D905
C913
0.01
Q902
CN312
1N4003
1N4003
120 UNF.RES (1/4W)
MTZ6.2JAT
+
DTC114YS
C345
+
1
2
Q901
R901
50V4.7
D910
2SA934(R)
C912
50V1
C914
6.3V470
47P
C346
0.068-M
+
MTZ5.1JA
D912
100K
R354
1N5401
CN901
D902
10
S4
9
S4
8
S4
7
S2/S3
6
S3
5
S3
4
S2
3
S1
2
S1
1
S1
SHEET 1/8
FL1
FL2
-35V
10K
R905
D911
1SS133
JA304
VIDEO OUT
MTZ6.8
D328
MTZ6.8
D329
GND
DSP signal
TAPE P.B. signal
MIC signal
AM signal
SHEET 2/8
ABCD E F G
2-3
Control section
MX-J270V
CLOCK
78
KEY2
RA708 220K
2.2K
R717
KEY1
RA709 220K
G1177G10
KEY128KEY227KEY326K1
R718 2.2K
X701
8.0MHz
FL701 QLF0021-001
10G
11G
220K
RA710
RA711 220K
76
S1373S1474S1575S16
IC701
UPD78044FGF-039
XT232XT131AVREF
AVDD
30
29
L704 4.7uH
R778 220K
R779 1M
C721 22P
C720 22P
A.BASS EX S.MODE
REC
S16
S15
S14
S13
S12
220K
RA712 220K
RA713 220K
RA714 220K
RA715 220K
RA716
71
72
69
S12
S1170S10
VLOAD
65
S968S867S766S6
PERIOD
LATCH
BACKUP
PROTECTOR
SPK
VOL+
VOL-
VDD
FTU
MRDY
SMUTE
ICVSS
PEM
POUT
OSDATA
DSPSTB
OSD
OSCS
OSCK
VSS33X134X235BEAT36MSI37MPX38+BCTL39MRESET
40
R720 2.2K
R719 2.2K
C722 0.001
R780
Q706
2SC2668
R784 2.2K
4.7K
C723
39P
R800 10K
L705
MSI
4.7uH
X702
M2Z4.19
C724 18P
R781 8.2K
RA720 220K
R,D,S
RA721 220K
RA722 220K
R744 10K
R753
2.2K
R737 2.2K
R736 2.2K
R769 2.2K
R768
R733 2.2K
R732 2.2K
RA723 220K
2.2K
NEWS INFO EOS
TA
SLEEP MONO ST
S11
S10S9S8S7S6S5S4S3S2
RA717 220K
RA718 220K
RA719 220K
64
S5
63
S4
62
S3
61
S2
60
S1
59
58
57
56
55
54
53
52
51
R730 10K
50
49
R703 2.2K
48
47
46
45
44
43
42
41
C726
39P
C725 22P
R782 8.2K
Q707
2SC2668
R728 2.2K
R704 1K
R721 1K
R726 220
R724 220
R723 220
R722 220
MPX
R783 4.7K
C727 0.001
220K
RA724
R700 10K
R731 1K
R788 2.2K
R789 10K
R725 2.2K
MRESET
RA725 220K
RA726 220K
RA727 220K
L708 22uH
C714 0.001
R745 47K
PERIOD
LATCH
PRI
SPK
FTU
MRDY
SMUTE
POUT
OSDATA
DSPSTB
OSD
OSCS
OSCK
C730 0.001
S1
FL2
9G
Q771 KTC3199
R738 220K
R761 10K
R758 10K
L702 47uH
L701
47uH
+
+
C701
C702
50V22
50V22
L706 10uH
FFC-13P
5
4
FL2
-35V
FL1
DG
SDATA
SCK
MCLK
MSTAT
MCMND
SHEET 2/8
NC
6V
SAFETY
FAUX
TAPE LED
MSIN
MPX
OSDATA
OSCK
OSCS
OSD
MRESET
DSPSTB
POUT
SMUTE
SHEET 2/8
MRDY
FTU
SPK
PRI
LATCH
PERIOD
CN701
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CN702
FFC-17P
3
FFC-11P
CN700
R806 390K
1
2
3
4
5
6
7
8
9
10
11
R804 82K
R805 82K
R807 390K
R809 100K
R808 100K
STTA
SLC-SDATA
SW5V
SLC-SCK
DG
NC
TKEY1
TKEY2
BPHOTO
SHEET 4/8
TKEY3
APHOTO
2
KTC3199
C739 0.01
C740 0.01
Q709
R765 330
Q708
KTC3199
SLC-SDATA
SLC-SCK
FAUX
TAPE-LED
STTA
MCLK
MCMND
MSTAT
SAFETY
TKEY3
TKEY2
TKEY1
L709 B.F
R729 1K
D701 1SS133
D705
MTZ5.1JA
D706
1SS133
0.12
C703
C715 16V10
+
R771
22K
C735 16V47
R766 1K
R767 1K
R764 27K
C718 6.3V100
C719 0.001
R754 4.7K
R755 100K
R709 2.2K
R710 2.2K
R756 100K
L703 10uH
L707 10uH
R772 10K
Q703
KTC3199
+
+
R770
R702 220
R762 100K
R757 10K
Q704
DTC114TS
22K
R773 10K
1
FL1
R701 220
R727 1K
R705 2.2K
R791 1K
R763 1K
R707 1K
R708 2.2K
R786 10K
D702 1SS133
3
2
CONT. RANDOM
1
6
543
2
FL1
1G2G3G4G5G6G7G8G9G
RA701 220K
RA702 220K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
R712 2.2K
R713 2.2K
R714 2.2K
R785 10K
4.7K
R774
C716 50V1
22
23
24
R715 2.2K
R787 10K
D703 1SS133
+
+
C717 10V1000
AB
REC
ALL PRGM
9
8
7
1011121314151617181920212223242526272829303132333435363738
RA703 220K
RA704 220K
RA705 220K
RA706 220K
RA707 220K
80
G9798G
7G
6G
5G
4G
3G
2G
1G
VDD
SCKO/SLC-SCK
SDATAO/SLC-SDATA
FAUX
LED-TAPE
SLC-STTA
MCLK
MCMND
MSTAT
RESET
PHOTO A
PHOTO B
AVSS
N.C
SAFETY1
SLC K3
SLC K2
SLC
25
R716 2.2K
KEY3
Q705
D704
1SS133
R776 10K
2SA1175(E.F)
R777
1K
R775 330
39
FL2
10K
R739
CXXX 0.01
CONTROL PCB
10G
Q772 KTC3199
10K
R741
R740 220K
C713 0.001
C708 150P
KEY2
KEY3
KEY1
C462
0.001
Q773 KTC3199
R742 220K
DTA114ES
R747 1K
R752 10K
IC404
GP1U261X
3
Q711
D709
1SS133
D708
1SS133
+
FW701
1
2
3
C737
150P
11G
R743 10K
FW702
1
P-LED
2
KEY_2
3
GND
FW703
1
KEY_3
2
KEY3
3
GND
R750 10K
R748 10K
FW704
1
KEY1
2
KEY_2
3
KEY_3
4
GND
1
PERIOD
2
FTU
3
TAPE
4
FAUX
5
6V
FW705
P-LED
KEY_2
GND
KEY1
KEY_2
KEY_3
GND
PERIOD
FTU
TAPE
FAUX
6V
FW701
FW702
1
2
3
1
2
3
FW704
FW705
GND1VCC2OUT
C461
16V47
C734 0.01
D707
POWER
red
KEY PCB
1
2
3
4
1
2
3
4
5
C733 0.01
>>
S414
<<
S415
TUN+
S416
TUN -
S417
1
2
3
QSW0538-001
R880 300
POWER
Q472
DTA114ES
S709
D415
JS701
green
Q473
DTA114ES
R491
R492
R493
R494
DISC1
S700
1K
EJECT1
R751
S701
1K
DISC2
R690
S702
1.2K
R691
EJECT2
S703
1.5K
DISC3
R692
R693
2.2K
D412
green
KEY CON[+]
S710
KEY CON[-]
S711
ECHO
S712
MPX/V,MASK
S713
SOUND MODE
S714
SBASS
S715
AUX
S406
S407
TUNER
S408
TAPE
S409
S704
EJECT3
S705
[TUNER]
R486 270
Q471
DTC114ES
CD
D413
green
R792
R793
R794
R795
R796
R797
R798
R480
R481
R482
[CD]
R487 270
1K
1.2K
1.5K
2.2K
2.7K
3.9K
5.6K
10K
18K
47K
FW703
1
KEY_3
2
KEY3
3
GND
R475
R478
[AUX]
R694
R695
R696
R473
R474
R476
R477
R488 120
green
D414
[TAPE]
Q470
DTC114ES
Q474
DTC114ES
R490 4.7K
2.7K
RANDOM
S706
3.9K
REPEAT
S707
5.6K
PAL/NTSC
S708
2K
STOP/CLR
S418
DECK A/B
7.5K
S422
REVERSE
3.9K
S423
5.6K
DUBBING
S424
REC
10K
S425
18K
CD REC
S426
R489 120
1K
2.2K
1.5K
2.2K
1
2-4
SHEET 3/8
HABC DEFG
MX-J270V
Cassette amplifier & Mechanism control section
5
4
3
2
1
SHEET 2/8
SHEET 3/8
Note
VDH1033-003PV
ABCD E F G
TAPE P.B. signal
SHEET 4/8
2-5
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