SERVICE MANUAL
DOUBLE CASSETTE DECK
No.4363B
Jul. 2001
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
TD-W254BK
TD-W254BK
Supplement
Area suffix
J
C
EN
U
U.S.A
Canada
Northern Europe
Other Areas
The transformer and the circuit board have already been changed
in issued model TD-W254BK (No.4363).
STANDBY / ON
POWER
REC/REC MUTE PAUSE
COUNTER RESET
COUNTER RESET
PHONES
A B SYNCHRO DUBBING
NORM SPEED HIGH SPEED
PLAY
PLAY
MIN
MAX
1
2
5
3
4
6
INPUT LEVEL
MIN
MAX
1
2
5
3
4
6
7
8
9
INPUT LEVEL
TD-W254
ON
OFF
DOUBLE CASSETTE DECK
DOLBY B-C NR HX PRO
AUTO TAPE SELECTOR / CONTINUOUS PLAY
REVERSE MODE
DOLBY B NR
OFF C
B
B
REC/PLAYBACK
AUTO REVERSE
A
PLAYBACK
AUTO REVERSE
STANDBY
Please confirm this SCHEMATIC DIAGRAMS (No.4363BSCH) to the schematic diagram
and the circuit board.
Please refer to TD-W254BK (No.4363) for the content of the text.
200107
VICTOR COMPANY OF JAPAN, LIMITED
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.4363B)
TD-W254BK
AB
C
1
2
3
4
5
TD-W254BK
2-1
Bloc
k
dia
gram
FL MUTE
DI701
Q705
Q706
Q707
1
1
7
3
5
3
7
1
5
9
15
22
10
11
2
1
2
8
6
4
13
7
5
15
2
4
4
2
8
7
4
4
1
3
7
9
3
9
7
1
11
12
10
17
2
8
7
2
3
8
9
16
30
3
1
28
47
48
2
3
4
5
6
7
9
24
METER
(R)
METER
(L)
G0 G6
Q8251
REC MUTE
VR126
REC LEVEL ADJ
(L)
VR226
REC LEVEL ADJ
(R)
Q2251
Q1251
B70
Q1152
DECK B
PB HEAD AMP
REC
Q8163
IC815
6
3
VR217
B DECK LEVEL ADJ
(R)
Q2152
REC AMP
IC825
VR117
B PB LEVEL ADJ
(L)
S1-S16
~
IC701
IC861
HEADPHONES
IC852
LEVEL METER AMP
J8601
H.P.JACK
LINE OUT
L
R
IC835
DOLBY NR
REC
OUT
(R)
REC
OUT
(L)
PB IN
(R)
PB IN
(L)
12.13
Q8171
PB O
UT
(L)
REC
IN
(L)
REC IN
(R)
PB OUT
(R)
IC818
PB SIGNAL
SELECT
A70
5.6
Q8172
B PB
A PB
IC811
7
3
PB HEAD AMP
DECK A
IC851
VOL.CONTROL
& DD RP
IC812
PB EQ SWITCH
VCA
VCA
LINE IN
DECK A
PB HEAD
VR111
A PB EQ ADJ
(L)
VR211
A PB EQ ADJ
(R)
DECK B
REC/PB HEAD
VR116
B PB EQ ADJ
(L)
VR216
B PB EQ ADJ
(R)
ERASE HEAD
IC845
B
HX PRO
L2401
L1401
BIAS DSC
Q8491
Q8492
Q8481
Q8482
+B
-B
L8401
FREQUENCY ADJ
-7V
-7V
VR246
BIAS ADL
(R)
VR146
BIAS ADJ
(L)
REC/PB SELECT
IC816
Q2101
Q1101
DB101
VR212
VR112
HS
(R)
(L)
A PB LEVEL ADJ
HS
L
R
L
R
L
R
VR601
Input Level
< MEMO >
TD-W254BK
2-2
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
Recording signal
Indicator signal
P.B signal (Deck A)
P.B & H.P signal (Deck B)
Equalizer & headphone amp circuit
Standard schematic diagrams
AB
C
D
E
F
G
1
2
3
4
5
2-3
TD-W254BK
Note:/s/t/T235812AV.001
VDH2358-102AV_1/1
IC811
CN801
CN802
Q8163
Q8101
J701
VR117
Q1101
R1104
R1109
IC811
VR217
IC815
IC816
Q2101
R2104
R2109
Q8471
R8151
VR116
VR216
Q8171
C8901
VR112
C1154
C2154
R2155
R1154
R1159
Q8172
IC815
R8152
IC861
J8601
IC891
VR212
R1155
R1158
R2158
R2154
R2159
C1156
C2156
Q1152
Q2152
R1108
R1106
R1105
R2108
R2106
R2105
C1104
C2104
R1110
R2110
C2106
C1106
R1601
R2601
R1602
R2602
R1604
R2604
IC861
L8401
R2452
C2456
C2452
R2451
R1452
R1451
C1452
C1456
Q8481
R8482
R8484
R8483
Q8482
Q8491
Q8492
R8492
R8493
C8496
C8495
CN815
CN811
C8493
IC818
VR146
C1152
R8101
C2152
R1152
VR246
VR111
R2152
R8173
CN861
R8171
C1101
C1108
C1102
R1102
C1103
C1105
D8481
C8101
R8172
R8102
C8102
R8471
C2107
C2101
C2108
C2102
R2102
C2103
C2105
R1111
C1601
C1107
R8451
C1151
C1153
C1155
R8104
C2169
C8151
C1169
C1602
C8152
C2602
C2151
C2153
C2155
C8453
R1165
R2165
IC812
R1107
R2107
R8103
VR211
R1101
R2101
C2601
R1603
R1605
R2605
R2603
C8602
C8601
R2111
R1160
R2160
R1161
R2161
R8452
R8453
D8451
D8452
CN845
R8472
CN862
R8474
R8473
R8475
D8101
C8483
C2454
IC845
C2453
C2455
R1453
C1457
C2451
R2453
C1451
C1453
C1454
C1455
C2457
C8451
C8454
C8455
L1401
L2401
C8452
R8481
C8481
C8482
C8492
R8485
R8486
R8491
C8494
C8491
AN6557F
QGF1205C1-06
QGF1205C1-20
QMS3533-V01
QVP0004-101Z
270K
15
AN6557F
QVPA601-101AZ
AN6557F
UPC1330HA
270K
15
22k
QVP0004-104Z
QVP0004-104Z
0.01
0.012
0.012
6.8K
270K
15
AN6557F
22K
BA15218N
QNS0092-001
M50253P
6.8K
4.7K
4.7K
270K
15
4.7/50
4.7/50
3.6K
4.7K
3.3K
3.6K
4.7K
3.3K
0.01
0.01
33K
33K
4.7/50
4.7/50
150
150
120K
120K
5.6K
5.6K
BA15218N
QQR0845-001
33K
0.039
100P
270K
33K
270K
100P
0.039
15
1K
1K
82K
82K
0.0015
0.0015
QGF1220F1-06
QGF1220F1-06
0.022
BU4066BC
QVP0004-203Z
330P
22k
330P
4.7k
QVPA601-203AZ
QVP0004-104Z
4.7k
100K
QGB2003L1-05
1K
470P
150P
150P
4.7K
150P
220/10
0.01
100K
100K
0.01
1.8K
470P
470P
150P
150P
4.7K
150P
220/10
12K
0.022
470P
4.7K
0.001
QVP0004-101Z
150P
220/10
47K
270P
10/25
270P
0.0022
0.01
0.0022
0.001
QVPA601-101AZ
150P
220/10
1/50
1M
1M
BU4066BC
2K
2K
1K
QVP0004-104Z
1M
1M
0.022
10K
1.8K
1.8K
10K
0.01
0.01
12K
33K
33K
12K
12K
3.6K
3K
QGA2512C1-05Z
22K
QGB2003M2-05
1.8K
22K
47K
330/25
0.01
UPC1297CA
560P
0.022
10
10/25
560P/100
10
560P/100
560P
0.01
0.022
10/25
10/25
100/10
100/10
QQR0847-001
QQR0847-001
10P
10K
4.7/50
100/10
47/25
470
3.3K
6.8
0.001
0.01/100
HS
RECSIG-R
MUTE
LINEOUT-L
LINEOUT-R
NS
7V
RECSIG-L
GND
PBIN-L
-7V
PBIN-R
5V
RECMUTE
NRREC
DUB
NRSW
DDRP
DDRPSEL
-24V
F1
F2
5.6V
11V
STBY
VOLRETURN
VOLSEND
METER-L
METER-R
RESET
POFF
BCrO2
B70
BMETAL