Osc Unit - Icom IC-7800 Service Manual Addendum

11-23 OSC UNIT

OSC UNIT
J73
to RXPLL-B S10M
unit J10
-0.6dBm
high frequency voltage tester
50Ω terminal
J72
to RXPLL-A M10M
unit J10
IC10 12.02V
BA12FP
L10
HF50ACC322513
1 2
I O
G
J71
to MAIN REF_IN/OUT
unit J491
5.00V
10.21V
X1
C20
CR-772.
Q21
5 1
0.1 2SC4081
+DC REF V
2
+VC C22 R23
4 3
OUT GND
0.1
4.7
5.00V
Q42
2SC4215
C42 R43
0.1 22
IC91
AD5260BRU50
1 14
A SDO
2 13
C94
W NC
3 12
B VL
4 11
0.0047
VDD VSS
5 10
SHDN GND
6 9
CLK PR
7 8
IC92
SDI CS
TC7W04F
5 4
6 3
7 2
8 1
ODAT
OCK
L92
HF50ACC322513
C76 R82
0.0047
47
Q70
2SC4081
C72
R75
C75
0.0047 47
0.0047
75m 0V
L24
C25 L23
0.1 0.68µ 0.82µ
Q22
2SC4215
C27 C30
82p 22p
R25
3.3k
Q23
DTC114EU
C45 L43 L44
0.1 0.68µ 0.82µ
C47 C50
82p 22p
R45
3.3k
Q43
DTC114EU
CP71
C71
R72
0.0047 39
ODAT
OCK
R77
100
C73
0.0047
RL11
FTR-B4CA012Z
Q11
DTC114EU
R61
Q12
DTC114EU
22
C61
Q61
2SC4081
0.1
RL10
C63 R64
FTR-B4CA012Z
0.1 47
2.91V
Q10
DTC114EU
Q13
Explanatory notes
DTC114EU
Q101
2SC4097
R101
220
OCK
ODAT
ODAT
OCK
11 - 23
C66
10p
L61
L62
LS-476
LS-476
Q62
2SC4081
MESUREMENT CONDITIONS
voltage at RX
frequency: 14.1 MHz
mode: J3E(USB)
ANT(RX): no input
Digital tester
range: input impedance
VOLTAGE LINE
200mV: 100MΩ
2V: 11MΩ
20V,200V,1000V: 10MΩ
J2
GND
OCK
ODAT
R3 1k OCS
R2 1k OSS2
to LOGIC
R1 1k OSS1
unit J814
L2
P+8V
P+15V
HF50ACC322513
P+15V
GND
L1
HF50ACC322513