Kenwood TX-21AP2D, Service Manual

Page: 9 / 22

9
CONTROL BLOCK DIAGRAM
IC601
M
ICRO
PRO
C
ESSO
R
1
KEY
S
C
A
N
Q110
0
TUNE
R
Q110
2
5
SD
A
4
SCL
LOC
A
L KE
Y
S
S
W
ITCHING
MA
T
R
IX
2
SL
O
W
1
RES
E
T
6
5
LE
D
EHT
/PRO
T
ECT
34
SDA
72
SCL
71
MU
T
E
80
SERVICE
77
SCL
_SW
1
6
IC1103
EA
R
O
M
SD
A
_
SW
1
5
Q110
3
XTAL
64
XTAL
63
IC2101
A
U
D
IO
PRO
C
E
SSO
R
SCL_SW1
2
SDA_SW1
3
21
RST
_M
S
P
71
XT
A
L
_I
N
72
XT
A
L
_O
U
T
5 6
D7
RM
7 8
SERVICE/TEST
A
V
1 21 PI
N SCA
R
T
LE
D
RM
KE
YS
C
A
N
LED
69
RM
8
SLOW1
Q110
1
X
210
1
Q230
6
12
SDA_SW2
10
SCL_SW2
X
601
D - B
O
A
R
D
D
583
Q238
0
Q238
5
ST
/O
N
70
Q852
POWER
SU
PPLY
REM
O
T
E
IC1062
AG
C
22
1
AG
C
RM
SDA SC
L
KE
YS
C
A
N
D1061
SER
VIC
E
SD
A
SCL
SCL
-SW
1
SCL
-SW
2
SD
A
-SW
1
SD
A
-SW
2
D
2101
Q210
1
SER
VIC
E
SER
VIC
E