If Unit - Yaesu FT-23R Technical Supplement

The FT-23R has been aligned by highly-skilled
technicians at the factory, and is designed so that no
further alignment should ever be required. However, in
the unlikely event of a component failure, realignment
may be necessary. All component replacement and ser­
be
vice should performed only by· an authorized Yaesu
representative , or the warranty policy may be voided.
Required Test Equipment
RF Signal Generator with calibrated output level at
•
1 50 MHz
Spectrum Analyzer
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RF Sampling Coupler
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Oscilloscope
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Make sure the transceiver is off. Remove the hard or
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soft case, if used, and remove the battery pack.
Remove the four screws affixing the battery spring
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plate on the bottom of the transceiver, and carefully
remove the plate.
Pull off the knobs, and remove the f o ur screws affix­
•
ing the top panel. Remove the panel and rubber
gasket under it.
Remove the two screws affixing the front and re ar
•
halves of the c ase, and gently separate the halves,
using care not to stress the interconnecting wires.
)
B oard Locations
A L I G N M E N T
Case Disassem bly
I F U N I T
SW
A N T U N I T
M OT H E R BOA R D
V C O U N IT
P L L U N I T
AF Millivoltmeter
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•
Deviation Meter
SINAD Meter
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Inline Wattmeter with 5% accuracy at 150 MHz
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Regulated DC Power Supply adjustable from 10 to
1 5V, 2A
50-Q Non-reactive Dummy Load: l OW at 1 50 MHz
•
•
Frequency Counter: ±0.2ppm accuracy at 1 50 MHz
AF Signal Generator
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•
DC Voltmeter: high impedance
External Loudspeaker or 8-Q load resistor.
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2 - 1 3
C N T L U N IT
R E G U N IT
M I C A M P U N IT
D U M M Y U NIT