Sony M-800-V Service manual

M-800V/850V

SERVICE MANUAL

Ver 1.2 2004.08

Photo : M-850V

SPECIFICATIONS

US Model

M-850V

AEP Model

M-850V

E Model

M-800V/850V

Chinese Model

East European Model

M-800V

Tourist Model

M-850V

Model Name Using Similar Mechanism Tape Tr ansport Mechanism Type MZ-730V -99

M-730V/830V

MZ-800V-99

Tape

Recording system

2-track 1-channel monaural

Speaker

Approx. 2.8 cm (1

Tape speed

2.4 cm/s (

Frequency range

300 - 4 000 Hz (with TAPE SPEED switch at 2.4 cm/s)

Input

Microphone input jack (minijack/PLUG IN POWER) sensitivity 0.21 mV for 3 kΩ or lower impedance microphone

Output

Earphone jack (minijack) for 8 - 300 Ω earphone

Power output (at 10% harmonic distortion)

250 mW

Power requirements

3 V DC batteries size AAA (R03) × 2/External DC 3V power sources

Dimensions (w/h/d)

Approx. 58.5 × 100 × 22.5 mm (2 and controls

Mass

Approx. 110 g (3.9 oz) (main unit only)

Supplied accessories

Microcassette tape MC-30 (1) (European model and world model of M-850V only) Batteries R03 (SB) (2) (European model and world model of M-850V only) Carrying pouch (1) (M-850V and European model of M-800V only)

Design and specifications are subject to change without notice.

(normal position type)

⁄8 in.) dia.

⁄16 ips), 1.2 cm/s (15⁄32 ips)

⁄8 × 4 × 29⁄32 in.) incl. projecting parts

9-873-543-03

Sony Corporation

Personal Audio Company Published by Sony Engineering Corporation

MICROCASSETTE

-CORDER

M-800V/850V

Ver 1.1 2004.01

TABLE OF CONTENTS

1. GENERAL ....................................................................3

2. DISASSEMBLY

2-1. Cassette Lid Assy····························································4 2-2. Cabinet (Rear) Sub Assy, Lid, Battery Case··················· 5 2-3. MAIN Board Section ······················································ 5 2-4. LED Board, Battery Holder ············································ 6 2-5. Mechanism Deck (MZ-730V-99)(MZ-800V-99)············6 2-6. Speaker (2.8cm) (SP901) ················································ 7 2-7. Microphone (MIC901)···················································· 7 2-8. Ceramic Head (HRPE901,902) and DC Motor (M901) ···················································· 8

3. MECHANICAL ADJUSTMENTS..............................9

4. ELECTRICAL ADJUSTMENTS ...............................9

5. DIAGRAMS

5-1. Block Diagram .............................................................. 11

5-2. Printed Wiring Board .................................................... 12

5-3. Schematic Diagram ....................................................... 13

5-4. Block Diagram .............................................................. 14

SERVICING NOTE

[How to recognize MZ-730V-99 and MZ-800V-99]

MZ-730V-99

DC motor (M901)

MZ-800V-99

6. EXPLODED VIEWS

6-1. Cabinet Section............................................................. 15

6-2. Mechanism Deck Section (1)

(MZ-730V-99)(MZ-800V-99)....................................... 16

6-3. Mechanism Deck Section (2)

(MZ-730V-99) .............................................................. 17

6-4. Mechanism Deck Section (2)

(MZ-800V-99) .............................................................. 18

7. ELECTRICAL PARTS LIST.....................................19

DC motor (M901)

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.

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.

SECTION 1

GENERAL

EAR

REC lamp (M-850V only) REC/BATT lamp (M-800V only)

M-800V/850V

This section is extracted from instruction manual.

MIC (PLUG IN POWER)

Microphone

> PAUSE

VOR

FAST PB (M-850V only)

Tape counter

BATT/E lamp (M-850V only)

CUE MARKER (M-850V only)

EAR

FAST PB (M-850V only)

Tape direction indicators

CUE/ REVIEW

TAPE SPEED

DIR

VOL

> PAUSE

CUE/ REVIEW

TAPE SPEED

DIR

M-800V/850V

SECTION 2

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set

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

Cabinet (rear) sub assy, Battery case lid

Cassette lid assy

MAIN board section

2-1. Cassette Lid Assy

6 cassette lid assy

LED board, Battery hoder

Mechanism deck (MZ-730V-99)

Microphone (MIC901)

Speaker (2.8cm) (SP901)

Ceramic head (HRPE901,902)

5 While push cassette lid ass

a bove remove

1 Open the cassette lid assy by pushing button (STOP).

2-2. Cabinet (Rear) Sub Assy, Battery Case Lid

1 four screws (1.7x16)

M-800V/850V

5 cabinet (rear) sub assy

2 claw

3 claw

2-3. MAIN Board Section

1 Remove the soldering (two portions)

6 battery case li

6 screw (IB lock)

2 Remove the soldering (eight portions)

3 Remove the soldering (two portions)

7 screw (IB lock)

5 screw (B1.7x9)

9 MAIN board

4 Remove the solderin

(four portions)

M-800V/850V

Ver 1.1 2004.01

2-4. LED Board, Battery Holder

MAIN board

1 Remove the soldering (four portions)

* Cautions when assembling

battery coil spring (-)

battery holder

On attaching the battery coil spring (-), fit it to the groove on the battery holder.

2-5. Mechanism Deck (MZ-730V-99)(MZ-800V-99)

Mechanism deck (MZ-730V-99)(MZ-800V-99)

7 LED board

6 claw

5 battery holde

button (REC)

button (PLAY)

button (STOP)

)

2-6. Speaker (2.8cm) (SP901)

M-800V/850V

2 knob (DIR)

3 two screws (B2.0)

5 speaker (2.8cm) (SP901

2-7. Microphone (MIC901)

4 microphone (MIC901)

2 claw

5 microphone cushion

3 microphone case

1 claw

+ 15 hidden pages