Sony XR-3750 User manual

MICROFILM
XR-3750/C350
AEP Model
UK Model
SERVICE MANUAL
FM/MW/LW CASSETTE CAR STEREO
SPECIFICATIONS
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MG-52A-135
Refer to RM-X2S/X3S SERVICE MANUAL (9-960-039-∏)
issued previously for information of remote commander
(RM-X2S) supplied with XR-C350.
Photo: XR-C350

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TABLE OF CONTENTS
1. GENERAL
Location of Controls (XR-3750) ..................................... 3
Location of Controls (XR-C350)..................................... 4
Installation ....................................................................... 5
Connections ..................................................................... 6
2. DISASSEMBLY.......................................................... 10
3. ASSEMBLY OF MECHANISM DECK ........... 12
4. MECHANICAL ADJUSTMENTS ....................... 18
5. ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 18
Tape Deck Section ........................................................... 19
Tuner Section................................................................... 19
6. DIAGRAMS
6-1. IC Pin Function Description ............................................ 22
6-2. Printed Wiring Boards –Main Section– ........................... 24
6-3. Schematic Diagram –Main Section– .............................. 27
6-4. Printed Wiring Board –Key Section– ............................. 32
6-5. Schematic Diagram –Key Section– ................................ 34
7. EXPLODED VIEWS ................................................ 39
8. ELECTRICAL PARTS LIST................................ 43
SERVICING NOTES
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-
aged by heat.

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SECTION 1
GENERAL This section is extracted
from instruction manual.

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Note: Follow the disassembly procedure in the numerical order given.
FRONT PANEL ASS’Y
1 Push the button
(release)
A
2 Remove the front panel ass’y
to the direction of the arrow A .
COVER ASS’Y
SECTION 2
DISASSEMBLY
2
1
3 cover ass’y
1
2