Read Sony XR-4950X / XR-4954X Service Manual online
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
2
TABLE OF CONTENTS
1. SERVICE NOTE
.............................................................
2
2. GENERAL
........................................................................
3
3. DISASSEMBLY
.............................................................. 13
4. ASSEMBLY OF MECHANISM DECK
................ 14
5. MECHANICAL ADJUSTMENTS
............................ 17
6. ELECTRICAL ADJUSTMENTS
6-1. Test Mode ........................................................................ 17
• Tape Deck Section ........................................................ 17
• Tuner Section ................................................................ 17
• Tuner Section ................................................................ 17
7.
DIAGRAMS
7-1. Block Diagrams
• TUNER/TAPE/MAIN Section ..................................... 18
• DISPLAY/KEY CONTROL/BUS CONTROL/
• DISPLAY/KEY CONTROL/BUS CONTROL/
POWER SUPPLY Section ........................................... 19
7-2. Printed Wiring Board – MAIN Board – ......................... 21
7-3. Schematic Diagram – MAIN Board (1/2) – ................... 22
7-4. Schematic Diagram – MAIN Board (2/2) – ................... 23
7-5. Printed Wiring Boards – KEY/SUB Boards – .............. 24
7-6. Schematic Diagrams – KEY/SUB Boards – .................. 25
7-7. IC Block Diagrams ......................................................... 26
7-8. IC Pin Function ............................................................... 27
7-3. Schematic Diagram – MAIN Board (1/2) – ................... 22
7-4. Schematic Diagram – MAIN Board (2/2) – ................... 23
7-5. Printed Wiring Boards – KEY/SUB Boards – .............. 24
7-6. Schematic Diagrams – KEY/SUB Boards – .................. 25
7-7. IC Block Diagrams ......................................................... 26
7-8. IC Pin Function ............................................................... 27
8.
EXPLODED VIEWS
................................................ 32
9.
ELECTRICAL PARTS LIST
............................... 35
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SECTION 1
SERVICE NOTE
SUB board
Front panel assembly
Please press on the sub board from above when checking it.
This assures that the connector does not lose contact.
This assures that the connector does not lose contact.
3
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
4
