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550
Bose 550 Service Manual
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Model 550
AM/FM Stereo Receiver
®
®
Part Number 1
12429 REV 01
Service Manual
2
Table of Contents
Table of Contents
2
Safety Information
3
Electrostatic Discharge Sensitive (ESDS) Device Handling
4
Specifications
5
Technical Description
7
Top Cover Removal
8
Top Cover Replacement
8
Front Panel Replacement
8
Disassembly/Assembly Procedures
8
Volume Control Removal
9
Meter Lamp Assembly Replacement
9
Dial Lamp Assembly Replacement
9
Dial Lamp Assembly Removal
9
AM Alignment Procedure
10
AM Tuner Adjustment Procedure
10
FM/MPX Tuner Adjustment
10
Test Procedures
10
FM Alignment Procedure
11
MPX Alignment Procedure
11
Low Filter Procedure
13
Low Frequency Control Procedure
13
High Frequency Procedure
13
Loudness Control Procedure
13
Amplifier Adjustment Procedure
14
Amp Adjustment Location
14
Block Diagram
15
Wiring Diagram
16
Main PCB Layout
17
PCB Layout
18
Exploded View
19
Dial String Diagram
20
Pinout Location Diagram
21
Part List Notes
22
Part List
23
Main Assembly
24
Miscellaneous
24
Variable Resistors
25
Resistors
25
Integrated Circuits
30
Diodes
30
120 To 240 Voltage Conversion
31
240 To 120 Voltage Conversion
31
FM 50 Microsecond De-Emphasis Change
31
Voltage Conversion Instructions
31
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Owner's Manual
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4
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Bose 550 Specifications
General
Type
Stereo receiver
Tuner Bands
AM/FM
Input Sensitivity
200 mV
Built-in Display
Yes
Input Impedance
47 kOhm
Bass Control
Yes
Treble Control
Yes
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