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Manuals
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Pioneer Manuals
Stereo Receiver
QX-949A Series
Service manual
Pioneer QX-949A Series Service Manual
4 channel stereo receiver
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Table Of Contents
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Specifications
Front Panel Facilities
About 2CH Power Boosting Switch
Changing Line Voltage Setting and Fuse
Connection Diagram
Block Diagram
Level Diagram
Circuit Descriptions
FM Tuner Section
AM Tuner Section
IF Amplifier and Detector
CD-4 Demodulator Section
Sum Signal System
Recording and Playback of CD-4 Discs
Difference Signal System
AGC Amplifier
FM Demodulator
Synchronous Detector
Muting Circuit
CD-4 Indicator Circuit
Acc
SQ Full Logic/Rm Decoder Section
SQ System
Circuit Composition
Operating Description
Control Amplifier Circuit
Low Frequency Control
High Frequency Control
Power Amplifier Section
Protection Circuit
Relay Driving Circuit
2-Channel Power Boosting Circuit
Over Current and Overload Detection
Detection of DC Voltage
Disassembly
Wooden Gabinet
Bottom Plate
Front Panel
Adjustments
Required Measuring Instruments
AM Section
FM Section
FM MPX Section
Top View
Bottom View
Power Amplifier Section
Dial Cord Stringing
Parts Locations
Front View
Rear View
Exploded Views
Packing
Nomenclature of Screws, Washers and Nuts
Example
Schematic Diagrams, P.C. Board Patterns and Parts Lists
Capacitors
Resistors
Lamps
Fuses
Tuner Assembly
Part List of Tuner Assembly
Headphone Jack Assembly
Power Supply Circuit B Assembly
Parts List of Power Supply Circuit B Assembly
CD-4 Assembly
Part List of CD-4 Assembly
SQ/RM Decoder Assembly
Protection Circuit Assembly
Parts List of Protection Circuit Assembly
Control Amplifier Assembly
Power Supply Circuit a Assembly
Switch Circuit Assembly
Power Amplifier Assembly
Parts List of Exploded Views
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Protection Circuit
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Power Amplifier Section
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This manual is also suitable for:
Qx-949a f
Qx-949a kcu
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