Equipment information
Icom IC-449A Transceiver
Manufacturer:
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Model:
IC-449A
Date:
1991
Category:
Group:
Description:
430 MHz FM TRANSCEIVER
Manual Type:
Service Manual
Pages:
47
Size:
16.44 Mbytes (17233643 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, all readable.
Upload date:
2016 01 06
MD5:
8ab7cc17f37476e6b49a4a9689a75a08
Downloads:
1490
Information
This service manual describes the latest information for the
following transceivers at the time of publication.
SECTION 1 SPECIFICATIONS
...
1—1
SECTION 2 INSIDE
VIEWS ...
2—1
SECTION 3 CIRCUIT DESCRIPTION
... 3-1-5
3-1 Receiver CIRCUITS
...
3—1
3-2 Transmitter CIRCUITS
...
3—2
3-3 PLL
CIRCUITS ...
3—3
3-4 LOGIC CIRCUITS
...
3—3
3-5 OTHER CIRCUITS
...
3—5
SECTION 4 ADJUSTMENT PROCEDURES
... 4-1-4
4-1 PREPARATION BEFORE SERVICING
...
4—1
4-2 PLL
ADJUSTMENT ...
4—2
4-3 Receiver ADJUSTMENT
...
4—3
4-4 Transmitter ADJUSTMENT
...
4—3
SECTION 5 MECHANICAL PARTS AND DISASSEMBLY
... 5-1-2
5-1 Transceiver
...
5—1
5-2 ACCESSORIES
...
5—1
SECTION 6 CONNECTOR ASSEMBLY
...
6—1
SECTION 7 PARTS
LIST ... 7-1-7
SECTION 8 BOARD
LAYOUTS ... 8-1-7
8-1 LOGIC
UNIT ...
8—1
8-2 MAIN UNIT
...
8—2
8-3 PLL-A UNIT
...
8—4
8-4 IF UNIT
...
8—4
8-5 APC
UNIT ...
8—4
8-6 VCO
UNIT ...
8—5
8-7 MIC-AMP
UNIT ...
8—5
8-8 YGR
UNIT ...
8—6
8-9 A-BANDUNIT
...
8—6
8-10 UT-51 TONE ENCODER UNIT
...
8—7
SECTION 9 OPTION UNITS
... 9-1-2
9-1 UT-50 TONE SQUELCH UNIT
...
9—1
9-2 UT-55 DTMF ENCODER/DECODER
UNIT ...
9—2
SECTION 10 VOLTAGE
DIAGRAM ... 10—1
SECTION 11 BLOCK DIAGRAM
... 11—1