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SCHEMATIC DIAGRAMS
MX-KB2,MX-KB15
Contents
Wiring diagram
Block diagram
Standard schematic diagrams
Printed circuit boards
2-2
2-4
2-6
2-18 to 22
CD-ROM No.SML200408
COMPACT COMPONENT SYSTEM
No.MB287SCH
2004/8COPYRIGHT 2004 Victor Company of Japan, Limited.
Area suffix
C ------------------------- Canada
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety.
2-1
< M E M O >
2-2
AC CORD P/N.: 30-00300-00L(AC 120V - 60 Hz)
Tuner board
CN803
C
ECOHP-M MUTESTBYL-OUTGNDR-OUT
P/N:11-01002-03
R.CH-R.CH+GNDL.CH+L.CH-GNDE-S
IR1GNDIR3LED+
Display & Key
P/N:11-01002-10
P/N:11-01002-12
P/N:11-01002-09
Main key
P/N:11-01002-00Main board
P/N:15-01002-00
Transformer
FM ANT AM ANT
Top left key
Left key
LOGIC DECK
A PLAY HEADER B R/P HEADER
LOGIC DECK CONTROL BUS
L-IN AGNDR-IN
CN201
CN110
CN202
CN207
KE
Y1
KE
Y2
JOG
-BJO
G-A
IR-I
ND
-STB
D-C
LK
D-D
AT
+5.6
VC
GN
D-2
7V
AC
2A
C1
A-M-SWSOL-APHO-AGNDA-T-SWT-MOTORREC-SWPHO-BB-T-SWB-M-SWSOL-BNILGND
CN103
CN500
CN205
CN505
CN510
CN511
CN509
CN503
CN601
CN101
CN208
SJ500
AUX INPUT
P/N:20-61030-003 PIN UL2547#30 P=2 L=360 mm
P/N:20-61133-01 13P UL2547+2651 P=2 L=370 mm
P/N:25-61260-80 13 PIN UL2896 P=1.25 L=260 mm
P/N
:25
-83
10
0-0
2
P/N
:25
-94
06
0-8
0
P/N:202 PIN
P/N:20-41040-00 4 PIN UL2651#28 P=2 L=50 mm
P/N:20-41130-00 13 PIN UL2651#28 P=2 L=2
P/N:20-61070-00 7 PIN UL2854#30 P=2L=360 mm
P/N:20-61030-023P UL547#30 P=2 L=300 mm
J601J602
CN504
Wiring diagram
AC
9
AC
6
AC
7
P/N
:20
-61
07
3-1
17
P U
L2
54
7+
26
51
P=
2 L
=2
50
mm
AU
X in
pu
t bo
ard
P/N
:11-0
1002-0
5
TU
-RA
GN
DT
U-L
+12V
+5.6
VD
GN
DS
TE
RE
OC
D-E
NP
LL-D
AT
PLL-C
LK
PLL-P
ER
RD
S-C
LK
RD
S-D
AT
R-I
NG
ND
L-I
N
TU
-RA
GN
DT
U-L
+12V
+5.6
VD
GN
DS
TE
RE
OC
D-E
NP
LL-D
AT
PLL-C
LK
PLL-P
ER
RD
S-C
LK
RD
S-D
AT
OL-D
ET
OL-P
RO
T
AC
1A
C2
-27V
CG
ND
+5.6
VD
-DA
TD
-CLK
D-S
TB
IR-I
NJO
G-A
JO
G-B
KE
Y2
KE
Y1
2P
IN U
L2
65
1#
28
P=
2 L
=1
00
mm
2P
IN U
L2
46
8#
26
2-3
CN803
CN802
CN801
CN861
CN804
CN901
ECOHP-M MUTESTBYL-OUTGNDR-OUT
16.V-CEN
14. E
12. A
10. C
8. GND
6. VR
4. F+
2. T-
15. COM
13. D
11. B
9. F
7. LD
5. PD
3. T+
1. F-
P/N:11-01002-05
P/N:11-01002-07
P/N:11-01002-09
P/N:11-01002-13
P/N:11-01002-11
P/N:11-01002-14
Main key
Display board Top light key
Right key board
Remote receive
3C
D M
OD
UL
E
PICK UP
CD DECK
Motor board
P/N:11-01002-00Main board
P/N:11-01002-06
Speaker board
P/N:11-01002-16
Power board Headphone board
R
L
CW3
CN206
CN201
N110
MO
+M
O-
CATH
EM
T+5V
RL+
RL-
SW
1G
ND
SW
2
CN204S
W2
GN
DS
W1
RL-
RL+
+5V
EM
TC
AT
HM
O-
MO
+CN207
KE
Y1
KE
Y2
JOG
-BJO
G-A
IR-I
ND
-STB
D-C
LK
D-D
AT
+5.6
VC
GN
D-2
7V
AC
2A
C1
CN500
CN205
CN402
CN401
CN501
CN502
CN508
CN506CN512
CN514
CN513
CN902
CN208
P/N:25-61135-80 16 P Ul2896 P=1 L=135 mm
P/N:25-94060-80 2 PIN UL2468#26
P/N
:25
-83
10
0-0
2
P/N:20-42110-00 11PIN P=2.5 L=250 mm
P/N:20-41051-37 5P UL2651#28 L=500 mm
P/N:20-51061-20 6 PIN UL1571#30 P=2 L=100 mm
P/N:20-41020-00 2 PIN UL2651#28 P=2 L=250 mm
P/N:20-41101-24 10 PIN UL2651#28 P=2 L=250 mm
P/N:20-41040-00 4 PIN UL2651#28 P=2 L=50 mm
P/N:25-83050-05 5 PIN UL2651#28 P=2 L=50 mm
P/N:20-41130-00 13 PIN UL2651#28 P=2 L=250 mm
P/N
:20
-45
04
1-8
04
P U
L1
00
7#
20
L=
25
0 m
m
GN
D1
AC
3
AC
5
AC
10
AC
11
AC
8
AC
9
AC
6
AC
7
P/N
:20-6
10
73-1
17
P U
L2
54
7+
26
51
P=
2 L
=2
50
mm
+9V
AG
ND
DG
ND
DG
ND
+12V
+5V
+5.6
VC
GN
D-2
7V
AC
1A
C2
GN
DS
LT
FM
+F
M-
DM
-D
M+
OL-D
ET
OL-P
RO
T
2P
UL
26
51
#2
8 P
=2
l-1
00
mm
CG
ND
KE
Y1
KE
Y2
JO
G-A
JO
G-B
CG
ND
KE
Y1
KE
Y2
JO
G-A
JO
G-B
AC
1A
C2
-27V
CG
ND
+5.6
VD
-DA
TD
-CLK
D-S
TB
IR-I
NJO
G-A
JO
G-B
KE
Y2
KE
Y1
2-4
Block diagram
Key board section
CD2
VFD
S501 KE
Y2
KE
Y1
FilamentAC3.3V
+5V+5V
+5V
STANDBY LED
U500 SC6311
VFD CONTROL / DRIVER
KEY SCAN
SC6122
REMOTE RECEIVER
ENCODE VOLUME
4 5
DA
TA
CL
K
ST
B
LE
D5
00
R5
03
68
0R
GVSWCDR-W GAIN
CONTROL
+5V
VCC
JOG-A
JOG-B
DATA AND CONTROL
BUS
PICKUP
E D A B C F LD
U402 TA2153
RF AMPLIFIER
RF
RF
PP
RF
CT
FE
O
F-
T-
T+
F+
U403 TA20
DIGITAL SERVO
U405 SRAM
128k x 8 (15
FOO
TRO
DMO
FMO
LIMIT SW
U401 TC9462
DIGITAL SERVO
1 BIT D/A CONVERTER
ADDRESS BUS
DATA BUS
VDD 3V
VDOT 3.3V
U404 TC94A02F
CD ROM DECODE
MP3 DECODE
D/A CONVERTER
CPU
87EP26F-4K76
L CH
R CH
SDA
REQ
SCLU406
TC74HC14
EN
50
0
3 2 1
+9V
U101
TA8189
4CH Pre+Rec
AMP with ALC
H CASS A
L CASS B
BIAS OSC
R/P SWITCH CIRCUIT
LOGIC DECK-TP+9V
REC-E
H-PLAY
L-REC
IC602
TA2149BFN
IC600
TC9257 PLL
IF
STB
DATA
CK
L CH
R CH
L C
H
R C
H
REC SIGNAL
OUTPUT
+9V
U201 TC9422F
SYSTEM E.VOLUME
(Tone control input
selector Main volume)
R832
10k
R83110k
+V
C
-VC
IC801 STK402-050
When use head
the control volt
logic low le
LOW LOGIC DETECT
PROTECT ENABLE
Q860,Q861,Q864,Q865
SYS_MUTE
D803
IN4001
Q812
8050
Q813
8050 OV
ER
LO
AD
DE
TE
CT
PR
OT
EC
T
EN
AB
LE
L CH
R CH
AUX INPUT
2-5
7
910
86
54
32
111
!
!
+9V
T+
F+
CN
40
2
TO
CD
DE
CK
1 2 3 4 5 6
1 2 3 4 5 6
DM
+
DM
-
FM
-
FM
+
SLT
M-
M+
R241
10k
R242
10k
IN2
IN2
IN1
IN1
EMIT
ML+
ML-
R233
10k
R232
10k
+9V
U203 TA7219S
BRIDGE DRIVER
U202 TA7219S
BRIDGE DRIVER
TO 3CD DECK
CN204
1
2
3
4
5
6
7
8
9
10
MO+
MO-
CATH
EMIT
+5V
RL+
RL-
SW1
GND
SW2
3CD CHANGER DRIVER SECTION
AC PLUG
SW1
SW2
D849-D852
+VC
-VC
+12V
VDD 3.3V
U403 TA2092N
AL SERVO DRIVER
05 SRAM (SDJ)
28k x 8 (15ns)
HEADPHONE
Q862
8550 +12V
+9V
D806-D809
L7809CV
Q803
CE803
100uP/50V
D845
IN4001
U803
L7806CV
T802
T06910A
AC5
AC7
AC10
AC12
AC11
AC8
AC9
AC3
AC4
TRANSFORMERF804
T2.0A/250V
GRID VOLTAGE -27VAC 3.3V
FILAMENT VOLTAGE
+6V TO CPU
R862
10k
R877
22k
Q867
8050
n use headphone
control voltage is
ogic low level
2-6
!
PROTECT CIRCUIT
AMPSTK402-050
PRE_AMP
Standard schematic diagrams
Primary / Power amp section
2-7
!
!
!
!
! !
!
2-8
1 2 3 4 5 6 7 8 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Vss
XO
UT
XIN
RE
ST
XT
-OU
T
XT
-IN
TE
ST
F-S
HIF
T
RE
MO
TE
MU
TE
VF
D-C
LK
VF
D-F
TB
VF
D-D
AT
ES
S-C
LK
ES
S-D
AT
ES
S-S
TB
RE
C-E
N
SO
L-A
SO
L-B
EC
O
VO
L-S
TB
PO
WE
R
MR
+
VO
L-D
AT
VO
L-C
LK
RD
S-C
LK
D-S
EN
MR
-
CD
.RW
CD
.RE
S CEE
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
38
35
-C
38
35
-B
38
35
-A
PR
O-E
N
OL
-DE
T
MP
3-S
CL
K
MP
3-S
DA
T
MP
3-R
EQ
T-A
/B
B-C
UT
T-M
OT
O
A-P
HP
A-P
HO
A-M
-SW
B-T
-SW
B-P
HO
B-M
-SW
RE
C-S
W
RE
C-S
W
JO
B-A
JO
B-B
VD
D
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
Vss
BOOT
VREF
KEY1
KEY2
KEY3
POW-D
STEREO
RDS-DAT
SW2
SW1
STL
MD+
MD-
DUCK3
DUCK2
DUCK1
BUCK0
DUCK
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
PLL-DAT
PLL-CLK
PLL-PER
VDD
3835-AIN
U300
87EP26F-4K76
1 2 3 4
1 2 3 4 5 6 7 8 9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
CH
1/A
CH
1/B
NF
1
ME
/01
PR
E/0
1
MIX
/0
AG
ND
M/N
RE
C/0
2
CN
F
RE
C/I
2
GN
D
CH
2/A
CH
2/B
NF
2
ME
/02
PR
E/0
2
A/B
VC
C
DE
T
RE
C/0
1
RN
F
RE
C/I
1
AL
C
U101 TA8189N
Main section
2-9
1 2 3 4 5 6 7 8 9
10
11
12
13
2-10
3CD 08 00:08
FROM MAIN PCBDISPLAY BOARD
MAIN KEY BOARD
ST
AN
DB
Y L
ED
Display / Key control section
2-11
N KEY BOARD
ENCODER VOLUME
RIGHT KEY BOARD TOP RIGHT KEY BOARD
LEFT KEY BOARD TOP LEFT KEY BOARD
2-12
TC9462F
U401
TO MCU
CD section
2-13
TO PICK UP
TO CD DECK
2-14
U404TC94A02F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
RESET
MIMD
AD0
AD1
SDA
SCL
AD2
VDDT
SD0
AD3
AD4
SDIO
BCKIA
LRCKIA
AD5
CE
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
VSS
IO1
IO0
AD15
AD16
WR
AD14
AD13
VSS
REQ
AD6
AD7
AD8
VDDT
AD9
AD10
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
VS
SX
XO XI
VD
DX
CK
O
VD
DP
VC
OI
PD
O
VS
SP
IO7
ID6
IO5
VD
D
IO4
IO3
IO2
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
DE
VD
D
ST
AN
DB
Y
VS
S
VS
SL
VR
AL
LO
VD
AL
VD
AR
RO
VR
AR
VS
SR
TE
ST
P
CK
S
AD
12
AD
11
TO MCU
SDA
REQ
SCL
MP3 section
2-15
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
S
1
0
5
6
R
4
3
S
Q
6
7
8
T
9
0
16
45
14
13
12
11
10
9 8 7 6 5 4 3 2 1
GN
D
IO3
IO2
IO1
AD
0
AD
1
AD
2
AD
3
AD
4
AD
5
AD
6
AD
7
AD
12
AD
14
AD
16
NC
IO4
IO5
IO6
IO7
IO8
CE
1
AD
10
OE
AD
11
AD
9
AD
8
AD
13
WE
CE
2
AD
15
VD
D
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
2-16
RGND FM-RF LOWCUT
MIXOUT
VCC AM-IF FM-IF GND AGC Q
MPDET-OUTIF-REQSTDSC-OUTAM-OSCFM-OSCAM-RFRF-VCCFM-RF/O
IC602 TA2149BFN
Tuner section
2-17
NOTES:
ALL OF THE VOLUME OF THE COMPONENT VOLTAGE
TESTED AT THE FM MODE. NO SIGNAL INPUT STATUS
AM-IF FM-IF GND AGC QUAD R/OUT L/OUT
LPF2LPF1MPX-INDET-OUTIF-REQSTDSC-OUTC
02 TA2149BFN
PLL_PER
PLL_CLK
PLL_DATA
CD_EN
ST
DGND
+5.6V
+12V
TU_L
AGND
TU_R
2-18
Main board
(forward side)
Printed circuit boards
2-19
(reverse side)
2-20
Display board
(forward side)
(reverse side)
2-21
Tuner board
(forward side)
(reverse side)
2-22
! ! !
!
!
!
(forward side)
(reverse side)
Trans board
2-23
< M E M O >
Victor Company of Japan, Limited
(No.MB287SCH)Printed in Japan
WPC
AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
