Icom ID-52A Service Manual page 19

(Amended page)
February 2022
SECTION 9 SECTION 9 VOLTAGE DIAGRAM VOLTAGE DIAGRAM
• MAIN UNIT (1/5)
TTEMP
3VS
3VS
5V
5V
VCC-I
I
VCC-
Q10
2SA1832
5VS T5
T5
Q31 Q322
LDTC144EE LDTC144EE
R5
T5C
1k
TX: 4.8 V
RX: 0 V
R182
4.7k
RN142SM
C47
TXLO
TXLO
5P
Q12
To MAIN UNIT (4/5)
LDTC144EE
T5
4V
ISET1 ABPF1
ISET2 ABPF2
ATT
PSET BBPF1
UHFRF
VHFRF
Q33
LDTA114YE
VR4 _ 1
VR4
4V
4V
17
5 QF 16
VCC
6 QG 15
IC9 QA
EAR 7 QH 14
SN74HC595BRWN
SER
8 GND 13
OE
R206
5V
0
UR4
Q37
LDTA114YE
3VS
I
VCC-
R34
EP3
10
MMZ2012Y102B
R35
10
D315
RN142SM
During TX: 2.0 V
R1107
10
C93 C97 L12
D313 D314
C75
Q15
0.001 0.001 15N
2SC3356G
0.001
RN142SM
Q320
LDTC144EE
R55
1k
R41
0
LDTC144EE
T5
R114
100
During VHF operation: 4.9 V
During UHF operation: 0 V
R49 R59
560k 10k
C83
0.01
5 3
4
1
IC3 2
NJU7056F3
TXMUTE
4V
17 17
5 QF 16 5 QF 16
VCC VCC
6 QG 15 6 QG 15
IC4 QA IC5 QA
7 QH 14 7 QH 14
SN74HC595BRWN SN74HC595BRWN
SER SER
8 GND 13 8 GND 13
OE OE
IOSTB
CK
5V
The underlined parts have been updated from the addendum of the previous version, or from the original page.
3VS
EP4
MPZ1608S101A
C145
Q22
18P
RD08MUS2
C110 C146
Q18
0.001 18P
RD01MUS2B
MP1
3867
R66 C114
0 47P
R67
0
Q321
EP5
MMZ1005Y102CT
T5
Q19
LDTC114YE
VHFC
Q20
LDTC114YE
UHFC Q36
LDTA114YE
TX on VHF: 0 V
on UHF: 4.5 V
RX: 0 V
Q17 During VHF operation: 0 V
LDTC144EE
During UHF operation: 3.1V
UHFRF
VHFRF
RX: 4.0 V
TX: 0 V
4V
1
DA1
2
DA2
17 3
DA3
4
DA4
5 16 5
QF VCC DA5
6 15 6
QG IC8 QA DA6
7 14 7
SN74HC595BRWN
QH SER DA7
8 13 8
GND OE DA8
4V
DATA
5V
9-1a
R80
D24
R109
NTCG10
JDP2S12CR 33
D23
C156 C164 L38
16.1N
10P 47P 1SV307
C203
0.5P
C303
0.5P
R134
47k
C211
R95
0.001
100
L39 R124
18N 150
D25
C171
100P RN142SM
D26
RN142SM
3VS
DALD
R180
IC7 10k
16
GND
15
SO
14 DATA
DI
13 CK
CLK
12 DALD
CSB
11 IOSTB
TEST
10 DASTB
RESET
9 Q32
VCC
RUM002N02
BH2226FV
DASTB
IOSTB
TX on VHF: 3.8 V
on UHF: 0 V
RX: 0 V
D41
RN731V
MP2
L43 C249 C258 C269
3867
20N
68P 8P 12P
C226
0.3P
C235
0.001
C246
0.1
C256 C270
C223
0.001
4P 4P
VCC-I
VCC-I
5VS
5VS
3VS
3VS To MAIN UNIT (5/5)
5V
5V
4V
4V
RES _ R To MAIN UNIT (3/5)
IFRES
IFRES
AIFSTB
AIFSTB
To MAIN UNIT (3/5)
BIFSTB
BIFSTB
SEN _ R
SEN _ R
DALD
DALD To MAIN UNIT (5/5)
STEN
STEN To MAIN UNIT (5/5)
3VS
STSTB
STSTB
DATA
DATA
LIOEN
To MAIN UNIT (5/5)
CK
CK
TXSTB
PLLCK
PLLDATA