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IC-E90
Icom IC-E90 Service Manual
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9 - 6
VCO UNIT
• BOTTOM VIEW
1
2
3
2
1
3
4
S251
S253
S252
UP
E
DN
1
15
30
16
to RF unit
J251
J51
CK
DATA
PLSTB
DASTB
T43
T50
T14
B4C
AGC
B1C
VCC
B5
B3
GND
REF
PDA/UL
VMOD
HV
VSHFT
+3
PATMP
B2C
+10V
BSFT
V2
FSET
V3
V1
IF
CHG
The combination of this page and the previous
page shows the unit layout in the same
configuration as the actual P
.C. Board.
AF unit
• BOTTOM VIEW
48
50
Table of Contents
Default Chapter
3
Table of Contents
3
Circuit Description
9
Receiver Circuits
9
Transmitter Circuits
12
Pll Circuits
13
Port Allocations
15
Adjustment Procedures
18
Power Supply Circuits
15
Preparation
18
Trimmer Adjustment
20
Adjustment Mode Adjustments
22
Logic Unit
26
Af Unit / Vco Unit
29
Vco Unit
39
Block Diagram
50
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Instruction Manual
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Icom IC-E90 Specifications
General
Brand
Icom
Model
IC-E90
Category
Transceiver
Language
English
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