Sony XRC-340 Service manual
XR-3740/C340
SERVICE MANUAL
Photo: XR-C340
Refer to RM-X2S/X3S SERVICE MANUAL (9-960-039-∏)
issued previously for information of remote commander
(RM-X2S) supplied with XR-C340.
AEP Model
UK Model
Model Name Using Similar Mechanism NEW
T ape Transport Mechanism T ype
MG-52A-135
SPECIFICATIONS
MICROFILM
FM/MW/LW CASSETTE CAR STEREO
TABLE OF CONTENTS
SERVICING NOTES
1. GENERAL
Location of Controls (XR-3740) ..................................... 3
Location of Controls (XR-C340)..................................... 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
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.
– 2 –
SECTION 1
GENERAL
This section is extracted
from instruction manual.
– 3 –
– 4 –
– 5 –
– 6 –
– 7 –
– 8 –
– 9 –
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
FRONT PANEL ASS’Y
1
Push the button
(release).
2
Remove the front panel ass’y
to the direction of the arrow A.
COVER ASS’Y
1
2
A
3
cover ass’y
– 10 –
2
1
SUB PANEL, MECHANISM DECK (MG-52A-135)
3
connector
(CN302)
2
sub panel
1
three screws
(PTT2.6 × 8)
5
screw
(PTT2.6 × 6)
6
mechanism deck
(MG-52A-135)
4
flexible flat cable
(CN301)
1
three screws
(PTT2.6 × 8)
MAIN BOARD, HEAT SINK
2
two ground point
screws
3
main board
5
heat sink
4
screw
(PTT2.6 × 8)
(XR-C340 only)
1
screw (PTT2.6 × 8)
4
screw (PTT2.6 × 8)
(XR-C340 only)
4
six screws
PTT2.6 × 8 : XR-C340
PTT2.6 × 10: XR-3740
– 11 –
1
two screws
(PTT2.6 × 8)
SECTION 3
ASSEMBLY OF MECHANISM DECK
Note: Follow the assembly procedure in the numerical order given.
ALIGNMENT OF FRONT SWITCH
hole
1
Align ¢ mark on the rotary switch
the position shown in the figure.
chassis (S) ass’y
GEAR (LDGE)
1
Align hole as shown in the figure.
2
Align hole in the gear (LDG-D) with the
position shown in the figure.
2
Install the gear (LDG-E).
– 12 –
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