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Sony XR-4950X Service Manual

Sony XR-4950X
42 pages
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SERVICE MANUAL
FM/MW/SW CASSETTE CAR STEREO
E Model
Model Name Using Similar Mechanism XR-C5100
Tape Transport Mechanism Type MG-25F-136
SPECIFICATIONS
XR-4950X/4954X
Photo: XR-4950X
Ver 1.1 2001.05
9-870-103-12 Sony Corporation
2001E0500-1 e Vehicle Company
C 2001.5 Shinagawa Tec Service Manual Production Group
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

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Sony XR-4950X Specifications

General IconGeneral
BluetoothYes
Backup Camera InputYes
Apple CarPlayYes
Android AutoYes
USBYes

Summary

Service Notes

Flexible Circuit Board Repairing

Guidelines for repairing flexible circuit boards, focusing on soldering iron temperature and conductor care.

Chip Component Replacement Notes

Precautions for replacing chip components, including reuse and tantalum capacitor handling.

Installation Procedures

Installation Precautions

Safety and mounting considerations, including clearances, environment, and hardware usage.

Connections and Wiring

Connection Cautions

Essential safety warnings for connecting the unit, including grounding, wire pinching, and power lead connections.

Disassembly Procedures

Sub Panel, Mechanism Deck Disassembly

Step-by-step guide for disassembling the sub panel and mechanism deck (MG-25F-136).

Mechanical Adjustments

Torque Measurement

Procedures and specifications for measuring torque on various parts like heads and rollers.

Tape Tension Measurement

Method for measuring tape tension using specific meters for forward and reverse modes.

Electrical Adjustments

Test Mode Procedure

Steps to enter and exit the test mode for electrical adjustments.

Tape Speed Adjustment

How to adjust tape speed using the speed checker and frequency counter.

Diagrams - Tuner/Tape/Main Section

Block Diagram: Tuner/Tape/Main Section

Illustrates the signal flow and connections within the tuner, tape, and main sections.

Diagrams - System Control Sections

Block Diagram: Display/Key/Bus/Power Supply

Shows signal paths for display, key control, bus control, and power supply.

Printed Wiring Boards: Main Board

Main Board Printed Wiring Diagram

Detailed layout of components and traces on the main board's printed wiring.

Schematic Diagrams: Main Board (1/2)

Main Board Schematic Diagram (Part 1)

Electrical schematic for the main board, covering signal paths and component interconnections.

Schematic Diagrams: Main Board (2/2)

Main Board Schematic Diagram (Part 2)

Continuation of the main board schematic, detailing further circuit connections and functions.

Printed Wiring Boards: Key/Sub Boards

Key and Sub Boards Printed Wiring

Layout of components and traces for the key and sub boards' printed wiring.

Schematic Diagrams: Key/Sub Boards

Key and Sub Boards Schematic Diagrams

Electrical schematics detailing the circuitry for the key and sub boards.

IC Block Diagrams

Integrated Circuit Block Diagrams

Illustrates the internal block structure of key integrated circuits used in the unit.

IC Pin Functions: Microcomputer

IC501 Master Microcomputer Pin Functions

Detailed description of each pin's function for the Master Microcomputer (IC501).

IC Pin Functions: Microcomputer (Continued)

IC501 Microcomputer Pin Functions (Part 2)

Continues the pin function details for the Master Microcomputer (IC501).

IC Pin Functions: Microcomputer (Continued 2)

IC501 Microcomputer Pin Functions (Part 3)

Further pin function details for the Master Microcomputer (IC501).

IC Pin Functions: Microcomputer (Continued 3)

IC501 Microcomputer Pin Functions (Part 4)

Additional pin function details for the Master Microcomputer (IC501).

IC Pin Functions: Microcomputer (Continued 4)

IC501 Microcomputer Pin Functions (Part 5)

Final pin function details for the Master Microcomputer (IC501).

Exploded Views: Chassis Section

Exploded Views: Front Panel Section

Exploded Views: Mechanism Deck Section

Electrical Parts List: Main Board Components

Electrical Parts List: Main Board Components (Continued)

Electrical Parts List: Keypad Components

Electrical Parts List: Keypad and Miscellaneous

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