Voltage Diagrams; Control Unit - Icom IC-208H Service Manual

SECTION 11

VOLTAGE DIAGRAMS

11-1 CONTROL UNIT

DS1 L2-0736TAY
R9 R11
47k 47k
S1
JRS0000-1401
DIAL-A
2
A
3 DIAL-B
B
1
COM
6 5 4
VOL
C1
R2
0.0047
1k
1
2 3
R24 4.7k
R25 10k
SQL
C3 SEG34 76
R6 P91/SEG34
0.0047
SEG35 77
1k
P92/SEG35
SEG36 78
P93/SEG36
R14 47k 79
P94/SEG37/M
80
S3-S11
P95/SEG38/DO
SKQDPA 81
PWR
P96/SEG39/CL2
82
S3 P97/SEG40/CL1
83
P40/SCK32
84
P41/RXD32
85
P42/TXD32
BAND PWR PWR 86
P43/IRQ0
S4 87
AVCC
VOL VOL 88
PB0/AN0
SQL SQL 89
PB1/AN1
VMHZ 90
PB2/AN2
91
S5
PB3/AN3
92
PB4/AN4
93
PB5/AN5
M/CALL 94
PB6/AN6
S6 95
PB7/AN7
96
PC0/AN8
97
PC1/AN9
TONE 98
PC2/AN10
S7 99
PC3/AN11
100
AVSS
LOW
S8
MONI
S9
SET
S10
SMW
S11
R22 Q3
470k 2SA1734
Q1
2SC4116
R13 4.7k
D5
MA8068
RDATA
TDATA
DS13-DS20
SML-512MW
CONTROL UNIT
50 SEG8
P57/WKP7/SEG8
49 SEG7
P56/WKP6/SEG7
48 SEG6
P55/WKP5/SEG6
47 SEG5
P54/WKP4/SEG5
46 SEG4
P53/WKP3/SEG4
45 SEG3
P52/WKP2/SEG3
44 SEG2
P51/WKP1/SEG2
43 SEG1
P50/WKP0/SEG1
42 COM4
PA0/COM1
41 COM3
PA1/COM2
40 COM2
PA2/COM3
39 COM1
IC6 PA3/COM4
38
HD6433842RB36H VCC
37 R84 4.7k
V0
36
V1
35
V2
34
V3
33 C34 0.01
VSS
32
CVCC
31
P37/AEVL
30
P36/AEVH
29
P35/TXD31
28
P34/RXD31
27
P33/SCK31
26
P32/RESO
HV
A amber :0.57V
yellow :0.2V
DS22
CV1074 green :10.0V
G A
W1
GR AM
R41 1M
R43
R42 4.7k 4.7k
X1
EFOS4914E3
Q6 Q7
2SC4116 2SC4116 G O
amber : 9.9V
yellow : 0.1V
green : 0.46V
R44 82
RDATA
TDATA
IC2
S-80945CLMC-G7F
1 5
R75 10k
OUT CD amber : 6.3V
2
VDD yellow : 5.8V
3 4
VSS NC C26 green : 6.5V
0.01
IC5 EP9 HV
TA78L05F EP10 TDATA
EP11 RDATA
EP12 GND
O I
G
C25 C27
0.001
0.001
C31 C30 C29
47p 47p 0.001
J3
to MAIN
unit J503
11 - 1