Read Sony XR-1890 Service Manual online
MICROFILM
SERVICE MANUAL
FM/AM CASSETTE CAR STEREO
US Model
Model Name Using Similar Mechanism
XR-1790
Tape Transport Mechanism Type
MG-36SZ9-32
SPECIFICATIONS
XR-1890
– 2 –
TABLE OF CONTENTS
1.
GENERAL
Location of Controls .......................................................
3
Setting the Clock .............................................................
3
Installation .......................................................................
4
Connections .....................................................................
5
2.
DISASSEMBLY
.........................................................
6
3.
MECHANICAL ADJUSTMENTS
.......................
9
4.
ELECTRICAL ADJUSTMENTS
Tape Deck Section ..........................................................
9
Tuner Section .................................................................. 10
5.
DIAGRAMS
5-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 12
5-2. Printed Wiring Board – MAIN Section – ...................... 13
5-3. Schematic Diagram – MAIN Section (1/2) – ................. 15
5-4. Schematic Diagram – MAIN Section (2/2) – ................. 17
5-5. Printed Wiring Board – PANEL Section – .................... 19
5-6. Schematic Diagram – PANEL Section – ....................... 19
5-7. IC Pin Function Description ........................................... 22
5-3. Schematic Diagram – MAIN Section (1/2) – ................. 15
5-4. Schematic Diagram – MAIN Section (2/2) – ................. 17
5-5. Printed Wiring Board – PANEL Section – .................... 19
5-6. Schematic Diagram – PANEL Section – ....................... 19
5-7. IC Pin Function Description ........................................... 22
6.
EXPLODED VIEWS
................................................ 24
7.
ELECTRICAL PARTS LIST
............................... 30
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 –
