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MICROFILM
SERVICE MANUAL
FM/MW/SW CASSETTE CAR STEREO
Saudi Arabia Model
Model Name Using Similar Mechanism
XR-4800
Tape Transport Mechanism Type
MG-25F-136
SPECIFICATIONS
XR-3750
– 2 –
TABLE OF CONTENTS
1.
GENERAL
Location of Controls .......................................................
3
Resetting the Unit ...........................................................
4
Detaching the Front Panel ...............................................
4
Setting the Clock .............................................................
4
Dismounting the Unit ......................................................
4
Installation .......................................................................
5
Connection ......................................................................
6
2.
DISASSEMBLY
.........................................................
8
3.
ASSEMBLY OF MECHANISM DECK
........... 10
4.
MECHANICAL ADJUSTMENTS
....................... 13
5.
ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 13
Tape Deck Section .......................................................... 13
Tuner Section .................................................................. 14
Tape Deck Section .......................................................... 13
Tuner Section .................................................................. 14
6.
DIAGRAMS
6-1. IC Pin Function Description ........................................... 17
6-2. Note for Printed Wiring Boards and
6-2. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 20
6-3. Printed Wiring Board – MAIN Section – ...................... 21
6-4. Schematic Diagram – MAIN Section (1/2) – ................. 23
6-5. Schematic Diagram – MAIN Section (2/2) – ................. 25
6-6. Printed Wiring Board – PANEL Section – .................... 27
6-7. Schematic Diagram – PANEL Section – ....................... 29
6-4. Schematic Diagram – MAIN Section (1/2) – ................. 23
6-5. Schematic Diagram – MAIN Section (2/2) – ................. 25
6-6. Printed Wiring Board – PANEL Section – .................... 27
6-7. Schematic Diagram – PANEL Section – ....................... 29
7.
EXPLODED VIEWS
................................................ 33
8.
ELECTRICAL PARTS LIST
............................... 36
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.
– 3 –
SECTION 1
GENERAL
This section is extracted from
instruction manual.
instruction manual.
– 4 –
