Kenwood RXD-302 Service Manual page 14

U V
TUNER
-CN101
1/4
CASSETTE DECK
MECHA. ASS'Y
A
1
CD CKT
-CN04
2/4
C
A-HALF SW 1
A-HALF
A-MODE SW 2
A-MODE
A-PHOTO OUT 3
A-SOL. 4
GND 5
A-SOLENOID
2 NC. 6
VCC 12V 7
MOTOR H 8
MOTOR L 9
B-HALF SW 10
B-HALF SW
B-MODE SW 11
B-MODE SW
B-PHOTO OUT 12
B-SOL. 13
NC. 14
REC SW(FWD) 15
REC SW(FWD)
REC SW(RVS) 16
REC SW(RVS)
3
NC. 17
B-SOLENOID
IC201 : TAB189N
IC401 : TDA7439
IC402,602 : NJM4558L
IC501 : STK407-040
Q201-206,208,214,216,223,224,
4
401,402A,403-405,504 : 2SC945P
Q207,209,212,407 : DTA114ES
Q210,211 : 2SK2541
Q215,218,220,222,710 : DTC114ES
Q213,702,705 : 2SC2001L
Q217,219,221 : 2SA934R
Q408,409,505,506 : 2SC2878A
Q501,502 : 2SC1841E
Q503 : 2SA988F
Q704,706 : 2SD882P
Q708 : 2SA965Y
D201-203,401,404-407,
501,502,504,706 : 1SS133
D503 : MTZJ5.1B
D705 : MTZJ6.2B
The DC voltage is an
D708 : MTZJ9.1B
actual reading mea-
D709 : W02G
5
sured with a high D710 : GBU4D
D711 : MTZJ13B
impedance type volt-
D713 : MTZJ33B
meter with a cassette D714,715 : 1N4002L
D716 : MTZJ12B
loaded at playback
mode. The measure-
ment value may vary
depending on the mea-
RECORDING LINE
suring instruments SIGNAL LINE
GND LINE
used or on the product.
B LINE
+B
Bias circuit DC voltage B LINE
B
is measured while in
the record mode.
CAUTION: For continued safety, replace safety critical
6
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 measure-
ments shall be carried out (exposed parts are acceptably
CD CKT
insulated from the supply circuit) before the appliance is
-CN05
returned to the customer.
2/4
B
7
W X
MAIN PCB
L
H
MOTOR
8.1V
CN402
+7.5V 1 +B
A-PHOTO INTERRUPTER JA
MUTE 2
JB
GND 3
C
R407
22K
Lch 4
GND 5 R408
22K
Rch 6
GND
C400
JK401
0.1
R401
39K
Lch 1
B-PHOTO INTERRUPTER
AUX
INPUT
R402
Rch 2
39K
+B
C208
47u16
+
C204 C206
680P 220P
CN201
R202 C200B
10 680P
1 1
Rch
0V
0V
TAPE A
PLAY
2 2 IC201
(FULL LOGIC)
PRE/
REC
AMP
0V 0V
R201 C200A
10 680P
Lch
3 3
C203 C205
680P 220P
TAPE B
REC/PLAY
(AUTO REVERSE)
CN202
R246
10
5 5
Rch
4 4
3 3
R245
10
2 2
Lch
REC:0.7V
Q202 Q204
Q201 Q206
1 1
2 2
ERASE
1 1
REC:10.3V
CN203
Q208
REC:7.4V
R244
2.2K
C236
0.022
Q201-206
R/P SWITCHING
Y Z
+B +B
C407
2.2u50 LA03
+
C406
2.2u50 LA04
+
C413A
0.47u50 LA07
+
C412A
0.47u50 LA06
+
C428
4.7u50 LA05
+
REC:4.3V
PLAY:0V
Q224
R255
R254 4.7K
Q223
REC:8.5V
R744 4.7K
PLAY:8.4V
P.B
150K
MUTING R215
220
+B +B +B
1/4W
10.9V
R212
+ D203
12K
C210 R208
R213 47K
0.01 15K
R218 C222
C241 100u16 1.8K 22u16 Q216 R230
R204 4.7K
+ +
180K
R214 22K R220 330K
C237 1.3V
330u16
TAPE C246 R236 C226
1.3V
+
A:1.5V R216 C218 3.3u50 68K 3.3u50
1.4V B:0V
+ +
180K 220P
+
0.9V Q215
+
0V
1.4V
A/B
ALC
2.0V
REC:0V
PLAY:0.7V
Q214,216
0V
REC
2.0V
1.3V 1.4V MUTING
R217 C245
180K 3.3u50
1.3V
R203 +
+
180K
+
C209 R207
R229
0.01 15K
4.7K
+
+ +
Q214
R743 R209
150K 4.7K
Q203
BIAS OSC COIL
L201
Q205
8 7
9
6 REC:6.5V
BIAS OSC
3
5
Q213
Q207 2
REC:9.4V
4 1
BEAT
R233 220
CANCEL 1/4W REC:10.8V
+ Q212
REC:9.9V REC:5.2V
Q209
+B +B
10.9V
REC:10.9V
+ +
R235 Q211
Q210
REC:3.3V 4.7K REC:4.7V
REC:0V
BIAS
REC:4.7V
CONTROL
AA AB
A
CN101
10 9 8 7 6 5 4 3 2 1
MUTE
ON:4.6V
OFF:0V
10.9V
+B +B
ON:4.0V
OFF:0V
R410 TUNER
10K
MUTING
+
Q401 Q402A
+
+
C431
+
100u16
+B
+
4.0V
C426
IC401
220u16
3 BANDS DIGITALLY
+
CONTROLLED AUDIO LA12
4.7V
PROCESSOR
4.0V
4.7V
4.7V
C427
9.4V
LA08
4.7u50 4.7V C425
4.7V
10u50
+
4.7V
+
4.7V
4.7V
4.7V
+
4.7V
+
+B +B
C440A 47u16 R418 560 1/4W
10.9V
+B
+
REC:9.8V
R420 1M R419 1M
PLAY:9.9V 12.0V
+
C434 47P C435 47P
REC
Q403 BUFFER Q404 REC/PLAY:0V
5.0V
4.7V
R422 R421
5.0V
4.7K 4.7K
1
C433
0.47u50 REC/PLAY:4.7V
+
R227 C225
68K 3.3u50
4.7V
+
+ +
R427
100K
2
1.4V
0.7V
10.4V
R430 R429 R433
1K 4.7K 470
1/4W
Q405 + +
5.3V
D406
3
+
4
+B
+B
16 14
CN204
15
AC AD
R445 2.2K
C456 R444
2.2u50 2.2K
C425A
220P
Q702
IC401
4.7V
+
C710
47u10
+
+B
Q217
12.0V
+B
11.3V
R252
10K
Q218
Q219
+
R250
12.0V 10K
Q220
Q221
+
R248
12.0V 10K
Q222
MUTE
ON:4.1V
OFF:0V
D405
R276
4.7K
R277
4.7K
R278 R274
4.7K 4.7K
R280 R275
4.7K 4.7K
12.0V
R281 R279 C248
4.7K 4.7K 0.1
12 10 8 6 4 2
13 11 9 7 5 3 1