Table Of Contents - Yaesu FT-2500M Technical Supplement

I. General Information
Introduction . . . . . . . .
Specifications . . . . . . .
Chip Component Information . .
Circuit Description· . . . . .
Block Diagram . . . . . . . . . .
Interconnection Diagram . . . .
Exploded View & Miscellaneous Parts .
II. Servicing
Case Disassembly & PCB Access
LCD & Control Unit Access
Lithium Backup Battery Replacement
Panel Lamp Replacement
9600 Baud Packet Modification
Channel Display-Only Mode
Alignment ......... .
PLL & Transmitter
PLL
VCV (Varactor Control Voltage)
PLL
Reference Frequency
Transmitter Output .................................................... 2-7
Transmitter Deviation ................................................... 2-7
Receiver
Interstage Transformers ......................................... . . ........ 2-8
S-Meter Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
........ . ........................................... 2-8
Scanner Center Stop
Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
III. Board Units (Schematics, Layout & Parts List)
VCOUnit ..
MAINUnit.
MIC Unit ...
CNTL Unit ..
DISPLAY Unit .
IV. Optional Board Units (Schematics, Layout & Parts)
FRC-6 DTMF Paging Unit . . . . .
FTS-17A CTCSS T one Squelch Unit
MH-26GSJ Microphone
MH-27 ABJ Microphone . . . . . . . .
Cut out the label at the right and place
it behind the clear plastic window in
the spine of the manual binder.
Contents
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