Icom ID-52A Service Manual page 74

• MAIN UNIT (3/5)
4V
BPS4 BPS4
BLO
D101
C405 RN142SM R404
0.01 6.8k
R547
BLO
5.6k
R546
5.6k
1 15
NC DOUT
2 14
FMI LOUT
3 13
RFGND IC100 ROUT
4 12
SI4704
LPI GND
5 11
RST
VA
EP104
MMZ1005S601CT
B2LO
A2LO
4.0 V
APS4
B2LO
A2LO
During AM operation in A-Band: 3.7 V
APS4
R490
100
Q113
LDTA144EE
C512
0.01
Q110
Q109
2SC4738
2SC4738
C513
R496
0.1
27k
R555 C551
10k 0.22
R499
1M
C505
0.22
5
R491
3
10k 4
R501 1
IC104
56k 2
NJU7056F3
ALO
4V
ALO
BLO
R435
EP107 100k
MMZ1005Y102CT
25 DVDD
26 DVSS
27 VREFD
28 AVSS3
29 AGNDOUT
30 AGNDIN
31 LOCAP
32 LOIN
C418
WFM _ DET
33
1
R407
0
C496
100P
3VS
B2LO
A2LO
APS4
R436
R556
EP106 100k
MMZ1005Y102CT
0
R557
0
25
DVDD
26
DVSS
27
VREFD
28
AVSS3
C518 R430 C441
29
AGNDOUT
30
0.01 4.7k 0.01 AGNDIN
31
LOCAP
32
LOIN
33
D109
1SS390SM
C495
100P
R484
220k
C549
1
5
3
4
1
4V
2
IC105
NJU7056F3
C548
0.1
FM/DV: H
AM: L
ALO
4V
BPS4
3VS
R495
47k
1st IF
16
RSSIOUT
15
PDOUT
14 R456
DISCOUT
13 1M
IC101 AUDIOOUT
C464
12
AK2365AM
NAMPI 0.001
11
NAMPO
10
R457
NRECTO
Q106
9
BIAS
2SC4215
470
C462
390P
R461
C460
120k
390P
IF AMP
EP101
MMZ1005Y102CT
APS4
1st IF
16
RSSIOUT
15
PDOUT
14 R453
DISCOUT
IC102 13 1M
AUDIOOUT C463
AK2365AM 12
NAMPI 0.001
11
NAMPO
10 R454
NRECTO
9 Q105
BIAS
470 2SC5108
C461
390P
R459
C459
180k
390P
IF AMP
EP102
MMZ1005Y102CT
4V
ALO
9-3
BPS4
BLO
3VS
3.8 V
BPS4
To MAIN UNIT (2/5)
FI101
FL-500
2 OUT 3 Q111
GND R514 C523
3SK294
4 GND 1
C482
IN
0
0.01
0.01
1.4 V
57.15MHz
APS4
FI100
FL-496
2 3 Q112
OUT GND
R516 C524 3SK294
4 1
C480
GND IN
0 0.01
0.01
1.4 V
58.05MHz
ARFAGC
AAM
ADET
ALO
BLO
80RF
To MAIN UNIT (2/5)
BCATT
3VS To MAIN UNIT (5/5)
BDET
BDET
WFM _ DET
BMIXIN
WFM _ DET
ANOISE
ANOISE
BNOISE
BNOISE
ARSSI
ARSSI
BRSSI
3.2 V To MAIN UNIT (5/5)
BRSSI
ANOISEO
ANOISEO
BNOISEO
BNOISEO
DATA
DATA
CK
CK
C542
AIFSTB
AIFSTB
100P
C540 BIFSTB
To MAIN UNIT (1/5)
BLO BIFSTB
IFRES
IFRES
0.001
1.5 V
SEN _ R
SEN _ R
To MAIN UNIT (1/5)
RES _ R
RES _ R
32K
32K To MAIN UNIT (5/5)
3.2 V
C543
AMIXIN To MAIN UNIT (2/5)
100P
C541
ALO
0.001
1.5 V
AFM _ DET
To MAIN UNIT (5/5)
ARFAGC
To MAIN UNIT (2/5)
AAM
To MAIN UNIT (5/5)
ADET
ALO