Sony XRC-7203-SP Service manual

XR-C7203SP

SERVICE MANUAL

For RM-X2S (Remote Commander),
please refer to RM-X2S/X3S Service
Manual (9-960-039-∏) previously issued.

Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trade­marks of Dolby Laboratories Licensing Corporation.

SPECIFICA TIONS

East European Model

Model Name Using Similar Mechanism XR-C653SP
T ape Transport Mechanism Type MG-25D-136

MICROFILM

FM/MW/LW CASSETTE CAR STEREO

TABLE OF CONTENTS

1. GENERAL

Location of Controls ....................................................... 3

Installation....................................................................... 5

Connections ..................................................................... 7

2. DISASSEMBLY ......................................................... 9

3. ASSEMBLY OF MECHANISM DECK........... 11

4. MECHANICAL ADJUSTMENTS....................... 14

5. ELECTRICAL ADJUSTMENTS

Test Mode........................................................................ 14

Tape Deck Section .......................................................... 14

Tuner Section .................................................................. 15

6. DIAGRAMS

6-1. IC Pin Function Description ........................................... 19

6-2. Printed Wiring Board – MAIN Section –...................... 24

6-3. Schematic Diagram – MAIN Section –.......................... 29

6-4. Printed Wiring Boards – PANEL Section – .................. 33

6-5. Schematic Diagram – PANEL Section –....................... 35

7. EXPLODED VIEWS ................................................ 40

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 ˚C dur­ing 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 dam­aged by heat.

8. ELECTRICAL PARTS LIST ............................... 43

– 2 –

SECTION 1

GENERAL

This section is extracted from
instruction manual.

– 3 –

– 4 –

– 5 –

– 6 –

– 7 –

– 8 –

SECTION 2

)

(

)

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

SUB PANEL ASS’Y

2

two claws

1

two screws
(PTT2.6

×

8)

2

claw

1

two screws
(PTT2.6

MECHANISM DECK (MG-25D-136)

2

connector
(CN201)

×

8)

4

mechanism deck
(MG-25D-136)

3

sub panel ass’y

1

two screws
(2.6

×

6)

1

screw
(PTT2.6

×

8

3

flexible flat cable

CN231

– 9 –

HEAT SINK

d

2

heat sink

1

four screws
(PTT2.6 × 8)

1

four screws
(PTT2.6 × 8)

MAIN BOARD

1

two screws
(PTT2.6 × 8)

1

two ground point screws

1

ground point screw

2

main boar

– 10 –

3

insulator

SECTION 3

2

Move the arm (suction) in the arrow
direction and fit on projection.

1

Fit the arm (suction) on the shaft.

projection

ASSEMBLY OF MECHANISM DECK

Note: Follow the assembly procedure in the numerical order given.

HOUSING

4

Fit claw on B part.

3

Put the housing
under A part.

housing

5

Fit projection on C part.

2

Install the hanger onto
two claws of the housing.

C

part

7

Holder the hanger by bending the claw.

1

Install the catch to the hanger.

hanger

6

Fit projection on D part.

8

Hold the hanger by
bending the claw.

D

part

ARM (SUCTION)

A

part

B

part

– 11 –

LEVER (LDG-A) / (LDG-B)

shaft

A

1

Fit the lever (LDG-A) on
shafts A – C and install it.

shaft

B

shaft

C

3

type-E stop ring 2.0

shaft

A

Fit the lever (LDG-B) on

2

shafts
install it.

A

and B and

shaft

B

GEAR (LDG-FT)

hole

hole

gear (LDG-D)

lever (LDG-A)

gear (LDG-FB)

4

Align hole in the gear (LDG-D)
with hole the lever (LDG-A).

2

tension spring (LD-2)

5

gear (LDG-FT)

1

6

polyethylene washer

2

tension spring (LD-1)

– 12 –

3

Move the lever (LDG-B)
in the arrow direction.