Tx-Rx Unit (X57-5630-Xx) - Kenwood FM Transceiver TK-481 Service Manual

A B C D
TK-480/481
PC BOARD VIEW
1
TX-RX UNIT (X57-5630-XX) -10 : TK-480 -11 : TK-481 Component side view
2
3
4
GND
SQ
D2
D1
5
OPT
5C
LOK
AAC
6
RXEMAI
RXWMAO
RXD
TXD
7
RSSI
AUXRXD
AUXTXD
SB
AUDIOBEEP
8
9
10
DTA144EE 2SB1132
DTC114EE
DTC144EE
11
2SA1832
2SC4617
2SC4619
2SC5108
12
3SK318 3SK274
MA742
13
47
14
E F G H
R419
MONI
R420
R4
R5 R3
LAMP
C197
CN2
DEO
+
C195
C11 R7 C92
+
C123
DI9
C111 S
Q7
D
G
C112
R98
Q22
G
D
S
+
C109
R86
F1
+ C263
C58
RXAO
C100 R13 R422
CN10
C18
RXAI
R11
1
8
IC3
B
4 5
PTTOUT
C196
R32
+
C10
TXAO
R148
PTTIN
CN3
TXAI/MUTE
DI/ANI
IMN10 2SB798 2SC4988
UPA672T 2SJ243 S-81350HG-KD
2SK1824
I J K L
VC
X2
C15
C80
C60
R161
R25
R23
+
C79
R57
C75
CF1
C62
C55
R49
J72-0812-02
DA221
I
G
O
48
M N O P
IC30
1 2 3 4
D7
L25 C160
+
L20
XF1
Ref No. Address Ref No. Address Ref No. Address
IC1 4H IC14 6K D7 5P
IC2 8R IC30 3O D9 6Q
IC3 7F Q5 9L D10 6R
IC4 5G Q7 5F D17 9G
IC5 9S Q22 6F D18 9F
IC8 7I D2 9R
IC10 7I D6 5M
Q R S
C173
ANT
L30
L31
C174
C166
C40
L29 CN1
L11
+
C12
IC5
O
R17
D2
G
R2
I
C4 R1
R103
Component side
Pattern 1
Pattern 2
Pattern 3
Pattern 4
Pattern 5
Pattern 6
Foil side