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2 - 1
JA
CK1 unit*
FRONT unit
JA
CK2 unit*
TX unit
RX unit
P
A unit
REG unit
LOGIC
unit*
SECTION 2
INSIDE VIEWS
• BOARD LAYOUT
*: Located under side of this point.
• PA UNIT
T
op view
Pre-drive
(Q4:
2SK3475)
APC CTRL
(IC1:
T
A75S01F
Q9:
DTC143ZU
Q10:
DTC114EU)
+9 V
switch
(Q7:
DTC114EU
Q8:
2SA1362)
+5 V
regulator
(IC7:
T
A78L05)
P
ower amplifier
(IC2:
S-A
V32 50
W type
S-A
V33 25
W type)
1
2
3
4
5
6
7
8
9
10
...
70
71
VHF FM REPEATER
1
INTRODUCTION
2
ORDERING PARTS
2
REPAIR NOTES
2
TABLE OF CONTENTS
3
SECTION 1 SPECIFICATIONS
4
SECTION 2 INSIDE VIEWS
5
• LOGIC UNIT
6
• TX UNIT
7
• RX UNIT
7
SECTION 3 CIRCUIT DESCRIPTION
8
3-2 TRANSMITTER CIRCUITS
9
3-3 PLL CIRCUITS
11
3-4 OTHER CIRCUITS
12
3-5 POWER SUPPLY CIRCUITS
12
3-6 PORT ALLOCATIONS
13
3-6-6 CPU (LOGIC UNIT; IC33)
14
CPU-Continued
15
4-1 PREPARATION
16
• CONNECTION
16
CLONING SOFTWARE
17
■ EXITING THE ADJUSTMENT MODE
18
■ AFTER FINISHING ADJUSTMENT
18
A01 LW TXREF 127
19
4-2 PLL ADJUSTMENT
20
RX sensitivity chack point
21
Set to flat wave
23
SECTION 5 PARTS LIST
24
[FRONT UNIT]
25
[LOGIC UNIT]
25
[LOGIC UNIT][LOGIC UNIT]
26
[RX UNIT][RX UNIT]
31
[RVCO UNIT][RX UNIT]
33
[TX UNIT][TX UNIT]
34
[TVCO UNIT][TX UNIT]
35
[PA UNIT][PA UNIT]
36
[JACK1 UNIT][PA UNIT]
37
[VR UNIT]
37
[JACK2 UNIT]
38
[CHASSIS UNIT]
38
6-1 Opening the repeater’s
39
6-2 Voice scrambler unit
39
6-3 Duplexer and isolater
40
[CHASSIS PARTS]
42
[ACCESSORIES]
42
(F): FRONT UNIT
43
(L): LOGIC UNIT
43
(JA2): JACK2 UNIT
43
Screw abbreviations
45
8 - 1 TRANSISTORS AND FETS
46
8 - 2 DIODES
47
SECTION 9 BOARD LAYOUTS
48
VR UNIT
49
TVCO UNIT
49
RVCO UNIT
49
FRONT UNIT
49
9 - 5 LOGIC UNIT
50
LOGIC UNIT
51
9 - 6 RX UNIT
52
BOTTOM VIEW
53
9 - 7 TX UNIT
54
9 - 8 PA UNIT
56
PA U NIT
57
9 - 11 JACK2 UNIT ¡TOP VIEW
58
9 - 10 JACK1 UNIT
58
9 - 9 REG UNIT
58
JACK1 UNIT
59
JACK2 UNIT
59
REG UNIT
59
SECTION 10 BLOCK DIAGRAM
60
: RX LINE
61
: COMMON LINE
61
: CONTROL LINE
61
: DATA BUS
61
: TX LINE
61
SECTION 11 WIRING DIAGRAM
62
SECTION 12 VOLTAGE DIAGRAM
63
Voltage line
66
CHASSIS UNIT
69
Phone : +81 (06) 6793 5302
70
Fax : +81 (06) 6793 0013
70
S-14004MZ-C1-1
71
© 2003 Icom Inc
71
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