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TRC-447
Radio Shack TRC-447 Service Manual
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— 37 —
Ref.
No.
Description
RS Pa
r
t No.
Mfr’
s Part No.
W2
Wire
UL 1430
#24 10- 50- 3 BLK
CUFK005041Z
W3
Wire
UL 1430
#24 5-210- 3 BRN
CUF
A021021Z
W4
Wire
UL 1430
#24 5-210- 3 RED
CUFB021021Z
Miscellaneous
B1
PCB:Main (Not repairable)
P
A-432AA
BP
A
Y0432AA1
TP1
T
est Pin
TP-122
1820-01-PP1
BTPY0122001
Shield Case
SPTE,T=0.3
HSDC453000Z
Shield Plate
SPTE
HSDC454315Z
Cushion
NEOPRENE SP 25*15*15T
RCUN435264Z
Cushion
NEOPRENE
RCUN4B6610Z
36
38
Table of Contents
Table of Contents
1
Specifications
2
Cb Transmitter Portion
3
Cb Receiver Portion
3
Weather Radio Section
3
Channel Frequency of Pll Synthesizer
4
Cb Band
4
Wx/Alert Band
4
Block Diagram
5
Alignment Point Locations (Main PCB)
6
Alignment Procedure
6
Alignment of Pll
6
Alignment and Adjustment
6
Alignment of Transmitter Section
7
Preset
7
Alignment Procedure
7
Alignment of Receiver Section
8
System Control Section Clock
10
Troubleshooting
10
Pll Circuit
12
CB no Good
12
WX no Good
13
Does Not Receive
14
Rx Section Check
14
Tx Section Check
15
Does Not Transmit
15
Wiring Diagram
16
Main
17
Printed Circuit Boards
17
SWITCH/VOLUME/LED/MIC/CH SW/SWR Pcbs
19
To Remove the Top and Bottom Covers
20
Exploded View and Disassembly Instructions
20
Mechanical Parts List
23
Main Pcb Assembly
24
Electrical Parts List
24
Switch PCB ASSEMBLY
38
Volume PCB ASSEMBLY
39
Led Pcb Assembly
40
MIC Pcb Assembly
41
Other Electrical Parts
42
Diodes
43
Transistors
43
Semiconductor Lead Identification
43
IC Internal Diagrams
44
IC and Transistor Voltage Chart
46
Main PCB
50
Schematic Diagrams
50
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Radio Shack TRC-447 Specifications
General
Brand
Radio Shack
Model
TRC-447
Category
Radio
Language
English
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