— 7 —
DC CORD
ANT
J501
L205
RT201
J502
Microphone jack J751
WA901
GND(BLK)
13.8v(RED)
FUSE
Transceiver
AF Oscillator
PTT
MIC
Jack
ANT
Jack
J501
J751
Dummy Load
(50-ohm)
And Attenuator
RF Power Meter
Modulation Meter
5
4
10 F
16V
+
ALIGNMENT OF TRANSMITTER SECTION
Test Equipment Required and Connections
•
DC power supply: 13.8 V
•
Modulation meter
•
AF oscillator
•
RF power meter
•
Dummy load (50-ohm) & attenuator
Preset
•
ALERT/WX/CB position: CB
Alignment Procedure
Alignment Point Locations (Main PCB)
Step
Preset to
Adjustment
Remarks
1
No modulation
19 CH
L205
Adjust L205 by turning the core clockwise to obtain 3.8 W
reading on the RF power meter.
2
No modulation
—
Confirm frequencies of all channels are within specification.
3
No modulation
RT201
Adjust RT201 to position the indicator in the meter MT501
just on "SIG9".
Summary of Contents for TRC-447
Page 5: ...5 BLOCK DIAGRAM...
Page 16: ...16 WIRING DIAGRAM...
Page 17: ...17 PRINTED CIRCUIT BOARDS Main Top View...
Page 18: ...18 Bottom View...
Page 19: ...19 SWITCH VOLUME LED MIC CH SW SWR PCBs Top View Bottom View...
Page 21: ...21 5 13 20 1 21 9 10 26...
Page 22: ...22 12 11 18 23 24 25 19 18 20 3 20 9 20 5 20 10 20 11 20 3 20 12 20 13 20 14 20 12...
Page 50: ...51 50 SCHEMATIC DIAGRAMS 21 1576 Main PCB...
Page 51: ...52 SWITCH VOLUME LED MIC CH SW SWR PCBs 21 1576...
Page 52: ...RadioShack Corporation Fort Worth Texas 76102 21 1576 04A04 Printed in Japan...