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M-800V/850V
SERVICE MANUAL
Ver 1.2 2004.08
Photo : M-850V
SPECIFICATIONS
Model Name Using Similar Mechanism
M-730V/830V
Tape Transport Mechanism Type
MZ-730V-99
MZ-800V-99
US Model
M-850V
AEP Model
M-850V
E Model
M-800V/850V
Chinese Model
East European Model
M-800V
Tourist Model
M-850V
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-873-543-03
2004H16-1
© 2004.08
MICROCASSETTETM-CORDER
Tape
(normal position type)
Recording system
2-track 1-channel monaural
Speaker
Approx. 2.8 cm (11/8 in.) dia.
Tape speed
2.4 cm/s (15/16 ips), 1.2 cm/s (15/32 ips)
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 k
or lower impedance microphone
Output
Earphone jack (minijack) for 8 - 300
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 3/8 × 4 × 29/32 in.) incl. projecting parts
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.


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2
M-800V/850V
TABLE OF CONTENTS
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.
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
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
SERVICING NOTE
[How to recognize MZ-730V-99 and MZ-800V-99]
MZ-730V-99
DC motor (M901)
MZ-800V-99
DC motor (M901)
Ver 1.1 2004.01


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3
M-800V/850V
SECTION 1
GENERAL
nN
>
PAUSE
CUE/
REVIEW
Tx
TAPE SPEED
DIR
EAR
Tape
direction
indicators
VOL
EAR
Tape counter
VOR
REC lamp (M-850V only)
REC/BATT lamp (M-800V only)
FAST PB (M-850V only)
CUE MARKER
(M-850V only)
BATT/E lamp
(M-850V only)
Microphone
z
>
PAUSE
CUE/
REVIEW
Tx
TAPE SPEED
MIC (PLUG
IN POWER)
DIR
FAST PB
(M-850V only)
This section is extracted from
instruction manual.


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4
M-800V/850V
SECTION 2
DISASSEMBLY
· The equipment can be removed using the following procedure.
Note : Follow the disassembly procedure in the numerical order given.
2-1. Cassette Lid Assy
Cabinet (rear) sub assy, Battery case lid
LED board, Battery hoder
Mechanism deck (MZ-730V-99)
Speaker (2.8cm) (SP901)
Ceramic head (HRPE901,902)
Microphone (MIC901)
Cassette lid assy
MAIN board section
Set
2
3
6
cassette lid assy
5
4
1
Open the cassette lid assy
by pushing button (STOP).
5
While push cassette lid assy
a bove remove


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5
M-800V/850V
1
four screws (1.7x16)
2
claw
3
claw
5
cabinet (rear) sub assy
6
battery case lid
4
5
screw (B1.7x9)
7
screw (IB lock)
6
screw (IB lock)
9
MAIN board
3
Remove the soldering (two portions)
8
2
Remove the soldering (eight portions)
1
Remove the soldering
(two portions)
4
Remove the soldering
(four portions)
2-2. Cabinet (Rear) Sub Assy, Battery Case Lid
2-3. MAIN Board Section