Bc-156 Voltage Diagram - Icom IC-R20 Service Manual

12-3 BC-156 VOLTAGE DIAGRAM

• MAIN UNIT
13.5V (EXT DC)
F3
F2
S-N5051 S-N5051
EXT.
F1
DC IN
FGB 2A
13.5V
J1
C1
C7 C8
0.22
0.22 100
D6
SB20-03P
MAIN UNIT
Explanatory notes
VOLTAGE LINE
• TANSHI BOARD
J1
CHGOUT
1
CHGOUT
2
DET2
3
to
BATT–
4
BC-156
DET1
5
MAIN unit
BATT+
6
J4
5V
7
CONT
8
THD
9
R2
10k
TANSHI BOARD
Q7
R19
2SJ377
0.15 (1W)
R18
C10
1k
0.001
C9
0.22 R17
680
8 1
CD CS
7 2
SI ES
6 3
V+ CT
5 4
INVIN GND
C2
470
IC2
NJM2360AM
R15
R16
150k
47k
C12
470
R23 10
5.1v
D4
MA132WK
R1
0.15
D1
C1
1SS53
0.047
DET1
DET2
5.4V 5.2V
L1 HK-
R3
08S050-2010 R21
560
560
Q5
DTA114EE
D2
SB20-03P
Q6
DTA114EE
C3
470p
R6
120k
R5
10k
C4
470 G R
C5
0.01
DS1
VRPG3349S-734
C21
47
Q2
DTA114EE
R9
220k
DET1
4
1
DET2
3 2
Q4
D5
DTA114EE
DWA010
Q8
DTC114EE
CONT
CHG ON 1.2V
CHG OFF 0V
RL1: ON 0V
RL1: OFF 5.1V
BATT+
BATT–
RL1
A-5W-K
Explanatory notes
VOLTAGE LINE
12 - 2
3.0 Vp-p
CHG ON
1.77 ms
CHG OFF
D1
SB20-03P
Q1
C13
2SB1184
0.001
R2 C15
0.001
150
C6
D3
0.1
MA2S111
C36
CP1
4.7
IC1
MM1433EVBE
R12
R11
2.7k
R14
12k
100k
C19 C18 R22
0.1 0.1 56k
C20
0.001
Q3
UNR9214J
DET1
DET2
SBATT+
SBATT–
DET1 DET1
BATT+
BATT–
DET1
DET2
0.6V
C22
C14
0.1
0.001
C23
0.001
C24
C16
0.1
0.15
C25
0.001
C26
0.1
C27
0.001
J4
CHGOUT
1
CHGOUT
2
DET2
3
BATT–
to
4
DET1
TANSHI board
5
BATT+
J1
6
SW
7
CONT
8
THD
9
C28
0.1
C29
0.001
C30
0.1
C31
0.001
C32
0.1
CONT
C33
0.001
C34
SW
0.1
C35
0.001
CP1
+
CP2
–
CP3
CP4
+
CP5
–
CP6