Icom DC-197 Service Manual Addendum page 13

SECTION 6. VOLTAGE DIAGRAM
• MAIN-A1/-A2/-A3/-A4 UNIT
HF1 HF2
HF3
FGB
J2
EP2
3 3
2 2
EP3
1 1
HEP4
HEP5
11.7V / 12.0V
R2
11.08V / 11.06V
R68 R77
CP6
L2
Standby 0.29V
Charge 1.86V
Complete 1.87V
CP9
GND
CP10
RXD
CP11
TXD
CP12
RESET
CP13 R76
VDD
CP14 R25
VPP
Standby 0.40V
Charge 1.71V
Complete 0.40V
R71
DS1
DC IN
W1(CHASSIS)
1
2
11.7V / 12.0V
7.9V / 8.7V
Q2
4 3
5 2
6 1
GND1
Q1
R4
D2
10.42V / 10.39V 5.0V
10.4V
IC1
1 5
VO VIN
2
GND
3 4
CD VOR
12.0V
R6 R13 R15
C17 C18
Q3
R11 R14 R16
IC2
1 16
NO-INVIN NO-INVIN
5.0V / 5.0V
2 15
INVIN INVIN
3 14
FB REFOUT
4 13
DTC OC
5 12
R10
CT VCC
6 11
RT C2
7 10
GND E2
8 9
C1 E1
Q4
Q7
Ni-MH 2.42V
Li-ion 4.85V
Standby 4.85V
R66
IC3
HR88
1 30
P23 RXD
2 29
P24 TXD
3 28
P25 P20
4 27 CP17
AVDD P11
5 26
ANI0 P10
6 25
ANI1 VDD
7 24
ANI2 VSS
8 23
ANI3 X1
9 22
AVSS X2
10 21
IC0 IC0
11 20
P50 IC0
12 19
P51 RESET
13 18
P52 P03
14 17
P53 P02
15 16
P00 P01
X1
R70
CP5
Q10
6 - 1
+
C
T
R5
GND GND
LI
NI
GND
Ni-MH 9.21V
Li-ion 7.07V
Standby 0.35V
7.71V / 8.72V
R21
CP8
Ni-MH 9.23V
Li-ion 7.74V
Standby 8.7V(Li)
R31
IC4
R30 R32
R26
1 1 1
2 2 2
3 3 3
4 4 4
5 5 5
6 6 6
7 7 7
8 8 8
W 1 W 1 W 1
J 2 J 2 J 2
NOTICE: Refer to the PARTS LIST for the value and name of each component.
1 1
2 2
3 3
4 4
5 5
6 6
7
7
8 8
W 1 W 1
J 2 J 2