Icom IC-2730A Service Manual page 50

• MAIN UNIT (5/8)
R_VVCOC
R_UVCOC
R859
X201
560k VCC OUT
4 3
R782
R_REF VCON GND
1 2
1M
CR-993
15.3MHz
R:4.88V
R785
R_R5
10
C1019 C1022
R_2LO
3P 4P
Q220
C1026
2SC4738 R:0.62V
R_UNLK
R_PLLSW
R_LV
C1109 R857
0.1 10k
R870
2.2M
R868 C1002
REFMOD
10k 1
C1006
1
2
1
3
VCOMOD
4
5
R_MODMUTE
6
7
TC74VHC4066AFK
L_MODMUTE
R_VCOSHIFT
3.30V
22
R794
4.99V
R866
68k
7
8
C1029
9
C1137
10
0.001
11
0.001
12
R784
1k
10P R795
0
8.00V
Q222
LDTC144EE
R796
0
R797 R799
0 390
R792
10k
R790 Q221
2SK880
47k
3.30V
IC205
14
I/O1 VDD
13
O/I1 CONT1
12
O/I2 CONT4
11
I/O2 I/O4
10
CONT2 O/I4
9
CONT3 O/I3
8
VSS I/O3
7.99V Q226
2SC4738
EP201
MMZ1005Y102CT
25
24
LD
23
PDN2 SWIN
22
PDN1 CPZ
21
REFIN IC206 CP
20
AK1542A
TEST2 PVSS
19
GPO1 BIAS
C980
C993
0.22
100P
7.14V
3.36V
C1069
18P
R805
C1066
560
0.001
R820
4.7k
Q228
RUM002N02
7.06V
6.63V
R856 C1047
10k
0.1 C1068
3.5P
L326 R813
C1065
1U 100k
0.001
R819
4.7k
R863
0
Q227
RUM002N02
Q229
LDTC114YE
Q231
1 5
2
EP202
3 4
7.15V
MMZ1005Y102CT
Q230 DMA501010
LDTC114YE
R822
4.7k
5.58V
EP200 R835
MMZ1005Y102CT 470
R861 C1085
0.75V
0 0.001
Q234
C1089 R844
180
3P
2SC5108
6.96V
4.23V
2SC5231A
Q233
C1093 D232
C1083
22P 1SS390
0.5P
Q236
2.75V 2SC5108
0.74V
6.38V
D231
R875
L1SS400
120
3.63V
3.99V
L353 D233
Q232 18N
1SS390
2SC5231A
C1097
C1079
0.001 1.75V
1P
Q235
2.40V 2SC5108
0.75V
*: Refer to the PARTS LIST for the value and name of component.
10-6
RVCO
3179 2775
MP204 MP206
R:7.83V
R853
R_UR8
4.7k
R847
C1488 L344
R_ULO
8P 47N
0
L350
39N
R885 C1127 L338
R_VLO
0 0.001 82N
R:7.94V
R_VR8
C1101
0.001
6.78V
Q238
U_LOOUT
2SC5108
1.09V