Alinco DR-235 - Service Manual

DR-135 / DR-235 / DR-435
Service Manual
CONTENTS
SPECIFICATIONS
GENERAL ........................................................................................ 2
TRANSMITTER ................................................................................ 2
RECEIVER ....................................................................................... 2
CIRCUIT DESCRIPTION DR-135
1) Receiver System (DR-135) ........................................................... 3, 4
2) Transmitter System (DR-135) ....................................................... 4, 5
3) PLL Synthesizer Circuit (DR-135) ................................................. 5, 6
4) Receiver System (DR-235) ........................................................... 6, 7
5) Transmitter System (DR-235) ....................................................... 7, 8
6) PLL Synthesizer Circuit (DR-235) ................................................. 8, 9
7) Receiver System (DR-435) ......................................................... 9, 10
8) Transmitter System (DR-435) ......................................................... 10
9) PLL Synthesizer Circuit (DR-435) ................................................... 11
10) CPU and Peripheral Circuits(DR-135 DR-235 DR-435) ............. 11,12
11) Power Supply Circuit ....................................................................... 13
12) M3826M8269GP (XA0818) ....................................................... 14~16
SEMICONDUCTOR DATA
1) M5218FP (XA0068) ........................................................................ 17
2) NJM7808FA (XA0102) .................................................................... 17
3) TC4S66F (XA0115) ........................................................................ 17
4) TK10930VTL (XA0223) .................................................................. 18
5) BU4052BF (XA0236) ...................................................................... 19
6) TC4W53FU (XA0348) .................................................................... 19
7) M64076GP (XA0352) ..................................................................... 20
8) LA4425A (XA0410) ......................................................................... 21
9) M67746 (XA0412) .......................................................................... 21
10) M68729 (XA0591) .......................................................................... 22
11) M57788 (XA0077A) ........................................................................ 23
12) mPC2710T (XA0449) ..................................................................... 24
13) NJM2902 (XA0596) ........................................................................ 24
14) 24LC32A (XA0604) ........................................................................ 25
15) S-80845ALMP-EA9-T2 (XA0620) ................................................... 25
16) L88MS05TLL (XA0675) .................................................................. 25
17) AN8010M (XA0119) ....................................................................... 26
18) TK10489M (XA0314) ...................................................................... 26
19) Transistor, Diode, and LED Ontline Drawings .................................. 27
20) LCD Connection (TTR3626UPFDHN) ........................................... 28
EXPLODED VIEW
1) Top and Front View ......................................................................... 29
2) Bottom View .................................................................................... 30
3) LCD Assembly................................................................................ 31
PARTS LIST
CPU ..........................................................................................32, 33
Main Unit(DR-135) .................................................................... 33~36
Main Unit(DR-235) .................................................................... 36~39
VCO Unit(DR-235) ......................................................................... 39
Main Unit(DR-435) .......................................................................... 42
VCO Unit(DR-435) ......................................................................... 42
Mechanical Parts ............................................................................ 43
Packing Parts ................................................................................. 43
ACCESSORIES.............................................................................. 43
ACCESSORIES(SCREW SET) ...................................................... 43
TNC(EJ41U) .................................................................................. 44
TNC (EJ41U) Packing Parts ........................................................... 45
DR-135 ADJUSTMENT
1) Adjustment Spot ............................................................................ 46
2) VCO and RX Adjustment Specification ........................................... 47
3) Tx Adjustment Specification ............................................................ 47
4) Rx Test Specification ....................................................................... 48
5) Tx Test Specification ....................................................................... 49
DR-235 ADJUSTMENT
1) Adjustment Spot ............................................................................ 50
2) VCO and RX Adjustment Specification ........................................... 51
3) Tx Adjustment Specification ............................................................ 51
4) Rx Test Specification ....................................................................... 52
5) Tx Test Specification ....................................................................... 53
DR-435 ADJUSTMENT
1) Adjustment Spot ............................................................................ 54
2) VCO and RX Adjustment Specification ........................................... 55
3) Tx Adjustment Specification ............................................................ 55
4) Rx Test Specification ....................................................................... 56
5) Tx Test Specification ....................................................................... 57
PC BOARD VIEW
1) CPU Unit Side A ............................................................................. 58
2) CPU Unit Side B ............................................................................. 58
3) Main Unit Side A DR-135 (UP 0400B) ............................................. 59
4) Main Unit Side B DR-135 (UP 0400B) ............................................. 59
5) Main Unit Side A DR-235 (UP 0414) ............................................... 60
6) Main Unit Side B DR-235 (UP 0414) ............................................... 60
7) Main Unit Side A DR-435 (UP 0415) ............................................... 61
8) Main Unit Side B DR-435 (UP 0415) ............................................... 61
9) Tnc Unit Side A (UP 0402) (DR-135TP only) .................................. 62
10) Tnc Unit Side B (UP 0402) (DR-135TP only) .................................. 62
SCHEMATIC DIAGRAM
1) CPU Unit DR-135 / DR-235 / DR-435 ............................................. 63
2) Main Unit DR-135 ........................................................................... 64
3) Main Unit DR-235 ........................................................................... 65
4) Main Unit DR-435 ........................................................................... 66
5) TNC Unit (DR-135TP only) ............................................................. 67
BLOCK DIAGRAM
1) DR-135 ........................................................................................... 68
2) DR-235 ........................................................................................... 69
3) DR-435 ........................................................................................... 70
ALINCO,INC.
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Summary

Specifications

General Specifications

Provides general operational parameters like frequency range, operating mode, and power requirements.

Transmitter Specifications

Details transmitter output power, modulation system, and noise characteristics.

Receiver Specifications

Outlines receiver sensitivity, circuitry, and selectivity parameters.

Circuit Description DR-135

Receiver System (DR-135)

Details the double superheterodyne receiver system, including front end and IF circuits.

Transmitter System (DR-135)

Explains the transmitter circuitry, including modulator and power amplifier stages.

PLL Synthesizer Circuit (DR-135)

Describes the Phase-Locked Loop synthesizer for frequency control.

Circuit Description DR-235

Receiver System (DR-235)

Details the double superheterodyne receiver system for the DR-235 model.

Transmitter System (DR-235)

Explains the transmitter circuitry for the DR-235, covering modulation and power stages.

PLL Synthesizer Circuit (DR-235)

Describes the Phase-Locked Loop synthesizer specific to the DR-235.

Circuit Description DR-435

Receiver System (DR-435)

Details the double superheterodyne receiver system for the DR-435 model.

Transmitter System (DR-435)

Explains the transmitter circuitry for the DR-435, including modulation and power stages.

PLL Synthesizer Circuit (DR-435)

Describes the Phase-Locked Loop synthesizer specific to the DR-435.

CPU and Peripheral Circuits

Power Supply Circuit

Manages power ON/OFF and voltage distribution for radio operation.

Parts List

Main Unit (DR-135) Parts List

Main Unit (DR-235) Parts List

Main Unit (DR-435) Parts List

DR-135 Adjustment

DR-235 Adjustment

DR-435 Adjustment

Adjustment Spot

Specifies voltage and output conditions for initial adjustments.

VCO and RX Adjustment Specification

Details VCO and RX sensitivity adjustment procedures and targets.

Tx Adjustment Specification

Outlines adjustment procedures for transmitter power and modulation.

Rx Test Specification

Defines test standards and conditions for receiver performance.

Tx Test Specification

Defines test standards and conditions for transmitter performance.

Schematic Diagram

CPU Unit Schematic

Schematic diagram for the CPU unit of all models.

Main Unit DR-135 Schematic

Schematic diagram for the DR-135 main unit.

Main Unit DR-235 Schematic

Schematic diagram for the DR-235 main unit.

Main Unit DR-435 Schematic

Schematic diagram for the DR-435 main unit.

TNC Unit (DR-135 TP only) Schematic

Block Diagram

DR-135 Block Diagram

Functional block diagram for the DR-135 radio.

DR-235 Block Diagram

DR-435 Block Diagram

Alinco DR-235 Specifications

General

Brand	Alinco
Model	DR-235
Category	Radio
Language	English