Sangean MMR-77 Service Manual

MMR-77
FM/AM 2 BAND RECEIVER
CONTENTS
Specification ………………………………………………………………………………………………………2-3
Block Diagram ………………………………………………………………………………………………………4
Algnment Instructions………………………………………………………………………………………………5-9
Test Points Diagram…………………………………………………………………………….……….……………10
MAIN PCB Top View.………………………………………………………………………….……..………..…..11
MAIN PCB Bottom View…………………………………………………………………………….………….……12
CONTROL PCB Top View.……………………………………………………………………….……..………..…..13
CONTROL PCB Top View.……………………………………………………………………….……..………..…..14
Wiring Diagram..….………………………………………….………………….….……………..……….15
Troubleshooting Flow Chart..….………………………………………….……………….….……………..……16-17
Electrical Parts List………………………………………………..………………………………....……………18-19
Mechanical Parts List……………………………………………………………………………….…………….20-21
Exploded Views.…………………………………………………………………………….…………….……………22
IC Circuit Block Diagram…………………………………………..…………….………………………………23-24
Voltage Chart……………….……………………………..…………………………….…………………25-26
Semiconductor Lead Identifications……………………………………………………………………..……..…27
Schematic Diagram………………………………………….……………………………………………………28

Sangean MMR-77 Specifications

General

Radio type	Portable
Tuner type	Analog
AM band range	520 - 1710 kHz
FM band range	87.5 - 108 MHz
PLL synthesizer	-
Supported radio bands	AM, FM
Number of built-in speakers	1
Product color	Black, Silver
Volume control	Rotary
Protection features	Water resistant
Battery type	AA
Number of batteries supported	2
RMS rated power	- W
Built-in display	No
Apple docking compatibility	Not supported
Power source	AC/Battery