Table Of Contents - Yaesu FT-2500M Technical Supplement

Contents
I. General
Information
Introduction
.
.1,-l
Specifications
. . . .
.].-2
ChipComponentlnformation
....L-3
CircuitDescription
. , .
.'1,-7
Block
Diagram
.1_-11
InterconnectionDiagram
...1-13
ExplodedView&MiscellaneousParts
...L-15
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
. .
.2-'1,
2-l
2-'t
2-1.
,-1
2-4
Alignment..
.....2-5
PLL
& Transmitter
2-6
PLL VCV
(Varactor
Control
Voltage)
. .
.
2-6
PLLReferenceFrequency
. . . .
.2-7
TrqnsmitterOutput
..2-7
TiansmitterDeai.ation
. . . . .
.2-7
Receiver
2-g
InterstageTransformers
......2-8
S-MeterCalibration
.
.2-B
ScannerCenterStop.
......2-B
Squelch
....2-B
III.
Board
Units
(Schematics, Layout
&
Parts
List)
VCOUnit.
...3A-L
MAINUnit.
.
.38-L
MIC Unit
CNTLUnit
.
..3D-L
DISPLAYUnit.
....3E-1,
IV. Optional
Board Units
(Schematics, Layout
&
Parts)
FRC-5
DTMF
Paging
Unit
.
.
4A-'t_
FTS-L7A CTCSS Tone Squelch
Unit
. . .
.48-1-
MH-26csyMicrophone
.
.
.
.4C
llv{IJ-z7 AsI
Microphone
.
. 4D-7
Cut out the label
at
the
right
and place
it
behind the clear plastic window in
the spine of the manual binder.
FT-2500M
Technical Supplement