Kenwood RXD-A55 Service Manual page 22

A B
1
IC101
C607, R623,
MODEL NAME
608 624 IC301
RXD-A55 0.12 12K IC302
RXD-A75 0.1 4.7K IC303
IC601
IC860
RECORDING LINE
Q103-106 : 2SC1845F
SIGNAL LINE
Q107,108,121,122,
603-606,862,863,865
GND LINE
+B B LINE
Q109,360 :
B B LINE
Q110,111,126
Q124
Q128
Q302
2 Q850
Q851
Q852
Q864
D101,102,301-305,861,862
VD301
VD302
VD303
ZD351
ZD851
3
TUNER/MAIN SECTION
T303
AM CNP301
3
2 2
1 1
4
5
6
C338
1000P
+B
T306
4 6
4
5
3
FM FRONT END
IC301
B.P.F.
BF301
SO301
C303
5
10P
FM OSC
FM RF
D303 COIL
COIL
D304 T301
C301
1000P
C309 FM RF
1000P
C312
6 0.022
R314
22
R325
47K
0.9V
7
C D
AK-3
CNP701
: AN7345K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
: TA7358AP
: LC72131
C605
LA1832S
:
4.7u50
: LC75341
+
: KIA4558P 3
5
4
: KTC3199GR
KTA1266GR
6
: KRC104M
: 2SA1015GR
: KTC3203Y
: KTC3194Y
: KTC2026
: KIA7810AP
: KIA7805P
: RC102M
: DS1SS133
: SVC348S/-IT
: SVC211F
: SVC211SPA-C
: DZ5R1BSB
: DZ2R4BSB
2.3V
(2.1V)
AM
TRACKING
2
C331
R358
0.047
3.9K
C332
0.022 3.3V(3.5V)
1
4.8V
2.3V(2.1V) 2.6V
(5.0V)
(1.5V)
C335
560P
2
AM BAND
COVERAGE
1
2.2V
2.2V
+B
T351
AM IFT
5.0V
R309
10K
2.4V (0V)
R382
T302
150
1/4W VT
C393 R380
1u50 1.5K
5.1V
+
C381 IC302
12P 2.5V 0.8V
PLL
FM IFT
+B
R316
4.7K
C318
2.6V 100P
Q302
C382
15P 2.5V
OSC
BUFF.
R368
22K
R375
10.0V (0V)
+B
470
E F
U-3
16 17 18 19 20 21 22 23 24 25 26 13 12 11 10 9 8 7 6 5 4 3 2
5.0V
-13.4V
15V
+12V
R370
1K
R363
2.2K 21.5V
TP
R855
FM IF
3.3
DET/FM
1/2W
MPX/AM
IF
IC303
1.3V
2.2V
CD : 9.8V
3.7V
(1.9V)
C358
1u50
LG1
+
C357
2.2u50 R355
+
3.3K
+B
MECHA BASE
C370 1u50
+
ZD351
R395 C396
47K 100u10
+
L351
C395
100uH
0.022
0V
R392
(2.5V)
270 1/4W
ERASE
HEAD
R391
270 1/4W
TAPE 2
Q360 RECORD/
+B PLAYBACK
HEAD
FM +B
R383
SW 5.6K
R387 ST :
3.9V
5.6K
MONO :
0V
+B
+B
G H
CNS901
1
R609 R607 C613
330 10K 10u50
5.0V
+
SYSTEM MUTE
-20dB ATT
Q605 Q603
R621 R615
R605 C609
2.2K 2.2K
3.9K 0.12
C611
1500P
R622
2.2K R616
C619
2.2K
1u50
Q606
+
Q604
C621
MUTE ON : 1.3V
4.7u50
OFF : 0V
R610
+
330
C623
1u50
5.0V
+
C625
1u50 5.0V
+
C627
1u50
5.0V
+
R617 C629
10K 1u50
+
C642
+12V
47P
Q850 +12V AVR
12.2V
+B
C856
1000P
R869
12.7V
R879
Q851
5.6K 22K
Q863
IN OUT +B
R868
R878
GND 5.6K
+10V 22K
AVR
Q862
LVL-CTRL
C859
Q864
R871
1000P
Q852
10K 5.5V
IN OUT +B Q865
R870
GND
+5V
2.2K
AVR
-13.4V R866 330
15V
1/4W
+B +B
+B +B
PLAY : 3.9V
C153
PLAY : 8.0V
100u16
REC : 9.8V
+
R115 REC/PLAY
4.7K
R113 R114
10K 10K
Q109
CNP101
R102
1K
T1 R
PLAY : 7.3V
1 1
Rch
REC : 9.8V
Q103-109
SWITCHING
A GND
2 2
R101
T1 L 1K
Lch
3 3
TAPE 1
Q104 R104
PLAYBACK
2.2K
HEAD
CNS102
0V
M GND R106
C106
1 1
3.3K
ERASE
ERASE 180P
2 2
T2 R2
Q106
3 3
Rch
A GND
4 4
T2 R1
5 5
Lch
T2 L1
6 6
T2 L2
7 7
Q105 R105
C105 3.3K Q107
180P
R103
2.2K
Q103
I J
AUDIO PROCESSOR
IC601
1 D1 CLK 24
VDD 23
2 CE
VREF 22 5.0V
3 VSS
CCB
4 L OUT R OUT 21 5.0V
INTERFACE
5.0V
5.0V L BASS R BASS 20
5
5.0V 6 L TRE R TRE 19 5.0V
5.0V 7 L IN R IN 18 5.0V
5.0V 8 L SELO R SELO 17
5.0V
9 L4 R4 16 5.0V
AUX
10 L3 R3 15 5.0V
DECK
11 L2 R2 14
TUNER
5.0V
12 L1 R1 13
CD
5.0V
5.0V
OPE AMP
C866
9.6V
1000P IC860
10.0V
R865
D862
R873 1 8 100
VCC
7
1K 2 1/4W
D861
6
5
R867
100K 3
4
-15V
-11.8V
+B
+B
8
R120 C116 R174 C118 C120
56 100u25 1K 0.033 560P
+
R118 C114 R122 R124
REC : 0V
1K 330P 100K 3.9K
C122
1u50
C112
+
330P 0.5V
REC : 9.8V
PLAY : 0V
Q110
112K
Q111
Hich=T1
112K
0V
Q108
C111
0V 0V 0.5V
330P
R117 C113 R121 R123
1K 330P 100K 3.9K
R119 C115 R173 C117 C119
56 100u25 1K 0.033 560P
+
R125 C121
5.6K 1u50
+