Alinco DR-140T User Manual

DR-140T/E/TE1/TE2
Service Manual
C O N T E N T S
• SPECIFICATIONS
1) G eneral................................................................................2
2) Transm itter................* ........................................................ 2
3) Receiver...............................................................................3
• CIRCUIT DESCRIPTION
1) Receiver S yte m ......................................................... 4 -5
2) Transmitter System ....................................................5-6
3) PLL Circuit.........................................................................6
4) Terminal Function of C PU ........................................... 7
• SEMICONDUCTOR D ATA
1) AK2341 . ...........................................................................10
2) AN78L05M ................................................................... 11
3) LA4425A..........................................................................11
4) M 5218 FP .........................................................................11
5) M 56760FP...................................................................... 12
6) M 67746............................................................................13
7) M 68702H..........................................................................13
6) M 68702L..........................................................................13
9) MC7808CT...................................................................... 14
10) RH5VL32AA-T1 ............................................................14
11) RH5VL45AA-T1 ............................................................14
12) TK10930VTL...................................................................15
13) jczPC2710T...................................................................... 16
1 4 )24LC16B 16
15) . Transistor,Diode and LED Outline D raw ings ....... 17
16) L C D ....................................................................................18
• EXPLODED VIEW
1) Bottom V ie w ...................................................................19
2) LCD Assem bly...............................................................20
3) Top, and Front View .....................................................21
• PARTS LIST
Main Unit...................................................................... 21-22
Packing.................................................................................23
CPU Unit...............................................................................23
SP Unit ................................................ . ............................. 23
VCO U nit.............................................................................23
Mechanical P arts..............................................................23
EJ-20U .................................................................................24
• AD JUSTM EN T
1) Required Test Equipm ent .......................................... 25
2) PLL Adjustm ent.............................................................26
3) TX A djustm ent ......... . ...................................................26
4) RX Adjustment...... . .......................................................27
5) Adjustm ent Points ........................................................28
• PC BOAD VIEW
1) Main Unit Side A ...........................................................29
2) Main Unit Side B...........................................................30
3) CPU Unit Side A ..........................................................31
4) CPU Unit Side B............................................................31
5) VCO Unit Side A ...........................................................32
6) VCO Unit Side B ...........................................................32
7) EJ-20U (CTCSS Unit: O ption)..................................33
• BLO CK D IA G R A M ...................................................................34
• SCHEMATIC DIAGRAM
1) Main Unit T/E .................................................... ..... 35 -3 6
2) Main Unit T E 1/TE 2...............................................37-38
3) CPU U n it ........................................................................ 39
4) VCO U nit ............. . ..........................................................40
5) EJ-20U (CTCSS Unit: Option) ............................... 41
ALINCO, in c

Alinco DR-140T Specifications

General

Output Power	50W
Modulation	FM
Current drain RX	0.5 A
Current drain TX	10 A
Voltage	13.8 VDC
Impedance	50 Ω
Type	Mobile

Summary

SPECIFICATIONS

1) General

Provides general specifications for the DR-140T/E/TE1/TE2 radio.

2) Transmitter

Details the specifications related to the transmitter functionality.

3) Receiver

Outlines the specifications for the receiver system.

CIRCUIT DESCRIPTION

1) Receiver System

Describes the circuit blocks and operation of the receiver system.

2) Transmitter System

Explains the circuit blocks and operation of the transmitter system.

3) PLL Circuit

Details the phase-locked loop circuit used for frequency synthesis.

Terminal function of CPU

SEMICONDUCTOR DATA

1) AK2341 (XA0239) CTCSS Encoder/Decoder

Technical data for the AK2341 CTCSS encoder/decoder IC.

2) AN78L05M (XA0238)

Technical data for the AN78L05M 5V voltage regulator.

3) LA4425A (XA0410)

Technical data for the LA4425A 5W audio power amplifier.

5) M56760FP (XA0235)

Technical data for the M56760FP 540MHz frequency synthesizer.

Transistor, Diode and LED Outline Drawings

LCD

16) LCD Pattern

Shows various display patterns and their corresponding segment assignments.

EXPLODED VIEW

1) Bottom View

Illustrates the internal layout and component placement from the bottom view.

2) LCD Assembly

Shows the exploded view of the LCD module and its components.

3) Top and Front Views

Provides exploded views of the radio's top and front panels.

PARTS LIST

1) Main Unit

Lists the parts used in the main unit of the radio.

2) Packing

Lists the parts included in the packing and accessories.

3) CPU Unit

Lists the components used in the CPU unit.

4) SP Unit

Lists the parts used in the speaker unit.

5) VCO Unit

Lists the components used in the Voltage Controlled Oscillator unit.

ADJUSTMENT

1) Required Test Equipment

Lists the necessary test equipment for performing adjustments.

2) PLL Adjustment

Details the procedure for adjusting the Phase-Locked Loop circuit.

3) TX Adjustment

Describes the steps for adjusting transmitter parameters.

4) RX Adjustment

Outlines the procedure for calibrating the receiver performance.

5) Adjustment Points

Identifies specific locations on the circuit boards for making adjustments.