Sony XR-1800 Manual de usuario

MICROFILM

SERVICE MANUAL

AEP Model

UK Model

E Model

XR-1800

East European Model

XR-1803

Saudi Arabia Model

XR-1804

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type MG-36SZ9-32

SPECIFICATIONS

XR-1800/1803/1804

Photo: XR-1804

– Continued on next page –

XR-1800: AEP, UK Model/XR-1803

FM/MW/LW CASSETTE CAR STEREO

XR-1800: E Model

FM/AM CASSETTE CAR STEREO

XR-1804

FM/MW/SW CASSETTE CAR STEREO

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TABLE OF CONTENTS

1. GENERAL

Button Locations ............................................................. 3

Setting the Clock ............................................................. 3

Installation....................................................................... 4

Connections ..................................................................... 4

2. DISASSEMBLY ......................................................... 6

3. MECHANICAL ADJUSTMENTS ....................... 10

4. ELECTRICAL ADJUSTMENTS

Tape Deck Section .......................................................... 10

Tuner Section .................................................................. 11

5. DIAGRAMS

5-1. IC Pin Function Description ........................................... 14

5-2. Note for Printed Wriring Boards and

Schematic Diagrams ....................................................... 16

5-3. Printed Wiring Board – Main Section – ........................ 17

5-4. Schematic Diagram – Main Section (1/2) – ................... 19

5-5. Schematic Diagram – Main Section (2/2) – ................... 21

5-6. Printed Wiring Board – PANEL Section – .................... 23

5-7. Schematic Diagram – PANEL Section – ....................... 23

6. EXPLODED VIEWS................................................ 26

7. ELECTRICAL PARTS LIST ............................... 32

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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COVER ASS’Y

MECHANISM DECK BLOCK

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

SECTION 2

DISASSEMBLY

1

two screws

(PTT2.6

3

mechanism deck bloc

1

two screws

(PTT2.6

2

connector

(CN901)

cover ass’y

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MAIN BOARD, HEAT SINK

MECHANISM DECK

(MG-36SZ9-32)

1

two screws

(PTT2.6

)

2

heat sink

3

two screws

(ground point)

4

main board

1

five screws

(PTT2.6

1

two screws

(P2.6

mechanism dec

(MG-36SZ9-32)

1

two screws

(P2.6

2

bracket (MD)

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MOTOR ASS’Y (CAPSTAN/REEL) (M901)

CASSETTE HANGER (X)

1

two screws

(P2

3

motor ass’y (CAPSTAN/REEL

)

(M901)

2

belt

2

belt

Remove the claw toward

direction.

Remove the return link

toward direction.

cassette hanger

boss

two claws

Remove the claw toward

direction.

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CASSETTE HOLDER (X)

1

Push an arrow

part.

Removal the cassette holder (x

)

to direction of the arrow.

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SECTION 3

MECHANICAL ADJUSTMENTS

Mode Tension Meter Meter Reading

Forward CQ-403A more than 60 g

Reverse CQ-403R (more than 2.12 oz)

•TapeTension Measurement

1. Clean the following parts with a denatured-alcohol-moistened

swab:

playback head pinch roller

rubber belt capstan

idler

2. Demagnetize the playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. The adjustments should be performed with the power supply

voltage (14.4 V) unless otherwise noted.

•Torque Measurement

Mode Torque Meter Meter Reading

Forward CQ-102C 25 – 55 g•cm

(0.35 – 0.76 oz•inch)

Forward CQ-102C 1.5 – 4 g•cm

Back Tension (0.02 – 0.06 oz•inch)

Reverse CQ-102RC 25 – 55 g•cm

(0.35 – 0.76 oz•inch)

Reverse CQ-102RC 1.5 – 4 g•cm

Back Tension (0.02 – 0.06 oz•inch)

FF, REW CQ-201B 50 – 150 g•cm

(0.69 – 2.08 oz•inch)

SECTION 4

ELECTRICAL ADJUSTMENTS

TAPE DECK SECTION 0 dB= 0.775 V

1. The adjustments should be performed in the order given in

this service manual.

2. The adjustments should be performed for both L-CH and

R-CH.

TestTape

PB Head Azimuth Adjustment

Procedure:

1. Put the set into the FWD PB mode.

2. Turn the screw and check the output peak value. Adjust the

screw so that the peak value in channels L and R coincides

within 2 dB.

3. Check the phase in the FWD PB mode.

Type Signal Used for

P-4-A063 6.3 kHz, –10 dB head azimuth adjustment

WS-48A 3 kHz, 0 dB tape speed adjustment

screw

position

L-CH

peak

within

2 dB

output

level

L-CH

peak R-CH

peak

within

2 dB

angl

R-CH

peak

test tape

P-4-A063

(6.3 kHz, –10 dB)

L-CH

R-CH speaker out terminal

oscilloscope

––

Screen pattern

in phase good wrong

135

180

Ω

set

level

meter

test tape

P-4-A063

(6.3 kHz, –10 dB)

set

speaker out termina

Ω

–

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