Sangean WR-2 Service Manual

WR-2
FM RDS/AM PLL SYNTHESIZED
RECEIVER
CONTENTS
Specification ………………………………………………………………………………………………………2-8
Block Diagram ………………………………………………………………………………………………………9
Alignment Instructions……………………………………………………………………………………………10-15
Test Points Diagram…………………………………………………………………………….……….……………16
Main PCB Top View…………………………………………………………………………….……….……………17
Main PCB Bottom View.………………………………………………………………………….……..………..…..18
Control PCB Top View……………………………………………………………………………….………….……19
Control PCB Bottom View……………………………………………………………………………………………20
Wiring Diagram..….………………………………………….………………….….……………..……….21
Troubleshooting Flow Chart..….………………………………………….……………….….……………..……22
Electrical Parts List………………………………………………………………………………....……………23-26
Mechanical Parts List………………………………………………………………….………….…………….27-28
Exploded Views.…………………………………………………………………………….…………….……………29
IC Circuit Block Diagram…………………………………………..…………….………………………………30-37
IC and Transistor Voltage Chart….……………………………..…………………………….…………………38-41
Semiconductor Lead Identifications……………………………………………………………………..……..…42
Main Schematic Diagram………………………………………….…………………………………………………43
Control Schematic Diagram……………………………………….…………………………………………………44
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Sangean WR-2 Specifications

Frequency Coverage

FM frequency range	87.50 – 108 MHz
AM frequency range (10 kHz version)	520 – 1710 kHz
MW frequency range (9 kHz version)	522 – 1629 kHz

Power

AC power	120V/60Hz/24W
DC input voltage	12V/1A
operational voltage range	9-14V

Audio Output

output power	7 W 10% T.H.D.@100 Hz
headphones output	5 mW + 5 mW
output impedance	2.2 Kohm

Weight and Dimensions

dimensions	240x115x183 mm
weight	2.6 kg