Kenwood RXD-NV301 Service Manual page 19

K L
DECK BOARD
Q Q
3 7 6 3 1 5 1 5 0
1
IC402
HEAD SW
2
CN401
Lch
R401
1 1 1
10
TP405
REC : 4.7V
PLAY : 0.2V
1 2
3 2 2 2
Rch 3
3 3 4
TP404
2
1
R402
4 4 5
10
6
ERASE
5 5 7
T E
6 6 8
L 1 3 9 4 2 2 9 6 5 1 3
VR406
BIAS CURRENT
4
(R Ch)
VR405
BIAS CURRENT
(L Ch)
5
IC401 : CXA1897Q D401
IC402 : BA3126N
ZD401
Q401,402 : DTC343TK
Q403,408,410,414 : KTA1273Y
Q404,409,411 : DTC114ES
6
Q405 : DTC144EK
Q406 : DTA114ES
+B
Q407 : DTC143TK
Q413 : DTC114EK
Q415,416 : DTC114YS
w w w
Q417,418 : 2SC1740SR
Q419 : 2SD1302
Q420 : KTA1504Y
Q421 : 2SC3205Y
.
CAUTION: For continued safety, replace safety critical components only with manufacturer's
recommended parts (refer to parts list). indicates safety critical components. For continued
protection against risk of fire, replace only with same type and rating fuse(s). To reduce the
risk of electric shock, leakage-current or resistance measurements shall be carried out
7
(exposed parts are acceptably insulated from the supply circuit) before the appliance is
returned to the customer.
M N
C451 R417
220u25 6.8K
+
0V
P.B LEVEL
(L Ch)
7.9V
C409
1u50 2.6V 37 PB OUTB2
+
38
PB OUTA2
2.6V 39
PB FB22
C457
1.3V
0.01 C403 R405
10dB AMP
22u16 120 40
PB FB12
+
BD401
41 PB INB2
42
C401 820P
PB INA2
43
IC401
PB INA1
R403 47K
R449
C402 820P
2.7K
R404 47K
BD402
44 PB INB1
1.3V
C404 R406
22u16 120
45
PB FB11
+
2.6V
46
PB FB21
47
PB OUTA1
C410
1u50
48 PB OUTB1
+
2.6V
P.B LEVEL
(R Ch)
8.9V
R408
MUTING
1K
Q407
+B
T403 R439
TP406
10K
1
2
T402 R438
10K
3
T401
TP403
1
: 1SS133
2
: MTZJ5.1B
RECORDING LINE
SIGNAL LINE
GND LINE
B LINE
x a o
y
i
The DC voltage is an actual reading measured with a high impedance type
voltmeter with a cassette loaded at playback mode. The measurement value
may vary depending on the measuring instruments used or on the product.
Bias circuit DC voltage is measured while in the record mode.
O P
+B
8
R427
120K
T405
REC : 5.2V
PLAY : 0V
REC/PB
4.1V
C429 R429
2.2u50 5.6K
D R OUT2 24
NR
+
REC IN2 4.0V C433 2.2u50
23
+
22 R433 33K
GP CAL
R435 27K
21
EQ
FP CAL
20 R437 10K
SPEED
C435 2.2u50
REC/P.B AMP REC OUT2 19 4.0V
DOLBY B +
C436 2.2u50
REC OUT1 18 4.0V
+
17
B EQ
16
A EQ
EQ
15
DECK AB
C434
REC IN1 14 4.0V 2.2u50
10dB AMP
+
C430 R428
D R OUT1 13 2.2u50 5.6K
NR
+
4.1V
SIGNAL
CURRENT
(Rch)
Q Q
3 7 6 3
0.3V
C428
4.7u50
C418
4.7u50 +
+
T404
DOLBY
SW
Q413
+B
REC : 11.7V
Q421 Q414
+B +B +B
REC : 9.5V
C449
REC REC
C441 0.022 : 10.2V : 11.0V
0.047
Q419
C443 C440
BEAT
3300P 3300P
Q416 Q415
CUT
Q418 Q417
Q406
C442
2200P Cr02 : 0V
Nor : 5.0V
u 1 6 3 OSC
.
Q R
8.9V
2 4
9 9 8
C427 R423
4.7u50 1K
+
MUTE
Q405
ON : 1.7V
TP401
Q401
R469
1 Q403
10K
2
R459
10K
TP402 Q402
8.9V
1
2
R462
1K
MUTE MUTE
ON : 4.9V OFF : 8.9V
SIGNAL
OFF : 0V
CURRENT Q404
(Lch)
VR403
22K
+12V
R455
1
C467
0.01
3
R474 47K
R475 56K
4
R434 47K R465 10K
R432 10K R466 10K
Q420
TAPE
SPEED
11.9V
VR404
22K
R453
R430 C432 100
5.6K 0.22u50
11.7V
+
1 5 1 5 0 8 9 2 4
Q408
+12V
R450 11.1V
47K
Q409
Q410
R452
11.8V
47K
MOTOR
DRIVER
Q411
ZD401
3
4
1
REC
: 11.9V
+12V
REC : 4.9V
PLAY : 0.2V
R448
22K
m
REC/P.B
SW
c o
RXD-NV301/NV301E/NV701/NV701E
Y39-3640-10
S T
NV301 NV701
MUTE
11 11
FRONT-2 FRONT-2
2 REC(R)
9 9
10 10
-CP107 -CP107
GUARD
9 9
REC(L)
3/5 4/6
8 8
GUARD
7 7
PB(R)
B
6 6
A-GND
5 5
PB(L)
4 4
GUARD
3 3
+12V
2 2
+9.6V
1 1
CN402
DOLBY and the double-D symbol
are trademarks of Dolby Laborato-
ries Licensing Corporation. Noise
reduction circuit made under license
from Dolby Laboratories Licensing
Corporation.
LUG401
MECHA
CHASSIS
CN403
8.2K
(RVS) REC SW
1 1 1
2 2 2
CrO2 SW
3 3 3
MODE SW
4 4 4
COM
5 5 5
MOTOR-A
6 6 6
MOTOR-B M
7 7 7
9 8 2 9 9
+12V
+B 8 8 8
GND
9 9 9
R456
43K
HALF SW
10 10 10
SOL
11 11 11
PHOTO OUT
12 12 12
R457 (FWD) REC SW
13 13 13
22K
NV301 NV701
CN404
FRONT-2 FRONT-2
-CP106 -CP106
REEL
1 1
CrO2
3/5 4/6
2 2
MODE SW
3 3
STATUS
C
4 4
R436 (+5V)
5 5
47K
AMS
6 6
SOL
7 7
CN405 NV301 NV701
MOTOR-ON FRONT-2 FRONT-2
1 1
-CP105 -CP105
MUTE
2 2
SPEED
3/5 4/6
3 3
REC-MUTE
4 4
MOTOR-GND
5 5 D
DOLBY
6 6
BEAT-CUT
7 7
Cr02-REC
8 8
REC/PB
9 9
RXD-NV301(E,T,M,X,K,E2) (2/5)
RXD-NV701(E,T,M,X,K,E2,Y) (2/6)