Icom IC-RX7 Service Manual Addendum page 29

Feb. 2009
• 1st VCO UNIT
R57
R56
R55
PLL
IC3
20 GNDOSC 12
FINRF1
21 SWA2 11
FINRF2
22 SWB2 10
XFINRF
23 GNDDIG 9
GNDRF
24 SWA1 8
PS
MB15T61U L
R35 C38 0.68 SVA R24 R23
2.7K 3.3K 1k
0.68 SVA C39
C35
0.0033
R26 R25
Q7
2SC4117
6.8K 220
Loop Filter
R5
VCO1 150
939.1000-1170.1499MHz
C3
L1 3.5P
602MHz:0.8 V
LQW18ANR15G00D
Q1
R60 1SV309 L3
C2 C7
0 D2 0.001 C2012C 1P
2SC5006
R3
4.7K
R10
VCO2
220
700.9000-939.0999MHz
C16
5P
435MHz:0.75V
Q2
R61 L5 L6
C10 C14
0.001 0.5P
0 0.22U C2012C
2SC5006
R8
4.7K
R15
VCO3
220
511.6400-712.0999MHz
C19
9P
988MHz:0.7 V
Q3
R62 L8 L9
C18 C23
0.001 0.5P
0 0.22U C2012C
2SC5006
R13
4.7K
R19
VCO4
150
311.9500-520.8999MHz
C27
18P
ERJ2GE-JPW
50MHz:0.75V
ERJ2GE-JPW
Q4
R63 L19 L12 R64
C29 C45
1P
0.47U 0.001 C2012C *L21
0 *L20
2SC5006
R59
*C75 *C77
4.7K
J1
VP VCO3V
1 2
GND VCO1
3 4
PS VCO2
5 6
1k PSTB1 VCO3
7 8
PDATA VCO4
9 1 0
1k PCK OSC
11 12
GND GND
13 14
1k 1Lo +3V
15 16
C41 C42 C60
0.001 0.001 0.01
0.001 1k
Q12
2SC5277
*C43 C31
R46
Q8
2SC5231A 8-E
D7
1SV308
D8
4 3
1SV308
2
5 1
4 3
2
5 1
D9
1SV308
BUFF
0.001
IC2
R65 D10 R41
C47
3 4 C52
GND OUT
2 5
1SV308 0.001
*C49 GND GND 15
1 6
IN VCC
R42
C50
UPC2746TB
47 0.001
*; Refer to "PARTS LIST."
12
• 2nd VCO UNIT
3076
MP 1
10K
R2
6
RX:1.1V
5
L4 L1 C3
4
0.22U 15P
18N
FH102A-E
Q1
2ndVCO
409.4500MHz
or
448.7500MHz
M B15E03SLPFV1
9
10
11
12
13
14
R22 R14
15
16
330 10
+3V
R21
OSC
1k
1
2
C7 L3
3
4P 22N
C8
1P
PLL
CLK FIN
8
DAT XFIN
7
LE GND
6
PS DO
5
ZC VCC
4
L/F VP
3
P OSCO
C24
2
R OSCI
1
0.01
IC1
C22
Q3
2SC5277
0.01
Reference frequency signal Buffer
J1
PCK
1 2
PDATA
3 4
PSTB2
5 6
PS
7 8
GND
9 1 0
2Lo
11 12
13 14
R3V
15 16
R16
1k
*; Refer to "PARTS LIST."