Sony M-440 Service manual
M-440
SERVICE MANUAL
Ver 1.0 2001. 02
SPECIFICATIONS
Tape
Recording system
2-track 1-channel monaural
Speaker
Approx. 3.6 cm (1
Tape speed
2.4 cm/s (
Frequency range
300 - 4,000 Hz (with TAPE SPEED switch at 2.4 cm/s)
Output
Earphone jack (minijack) for 8 - 300 ohms earphone
Power output (at 10% harmonic distortion)
160 mW
Power requirements
3 V DC batteries R6 (size AA) × 2/External DC 3V power sources
Dimensions (w/h/d)
Approx. 62.2 × 121.5 × 24.3 mm (2
parts and controls
Mass
Approx. 125 g (4.5 oz)
Supplied accessory
Microcassette tape MC-30 (1)
(normal position type)
7
⁄16 in.) dia.
15
⁄16 ips), 1.2 cm/s (15⁄32 ips)
1
E Model
Model Name Using Similar Mechanism M-430
Tape Transport Mechanism Type MZ-430-99
⁄2 × 47⁄8 × 31⁄32 in.) incl. projecting
9-873-090-11
2001B1600-1
© 2001.2
Design and specifications are subject to change without notice.
Sony Corporation
Audio Entertainment Group
General Engineering Dept.
MICROCASSETTE
-CORDER
TM
M-440
TABLE OF CONTENTS
1. GENERAL ....................................................................3
2. DISASSEMBLY
2-1. Lid Assy, Cassette.......................................................... 4
2-2. Lid, Battery Case ........................................................... 5
2-3. Cabinet (Rear) Assy....................................................... 5
2-4. Main Board.................................................................... 6
2-5. Mechanism Deck ........................................................... 6
2-6. Head, Ceramic ............................................................... 7
3. MECHANICAL ADJUSTMENTS ..............................8
4. ELECTRICAL ADJUSTMENTS ...............................8
5. DIAGRAMS
5-1. Block Diagram .............................................................. 9
5-2. Printed Wiring Board................................................... 10
5-3. Schematic Diagram ..................................................... 11
6. EXPLODED VIEWS
6-1. Cabinet Section ........................................................... 12
6-2. Mechanism Deck Section ............................................ 12
7. ELECTRICAL PARTS LIST..................................... 13
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
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
M-440
This section is extracted
from instruction manual.
A
(a)
Insert the # side first for each battery.
Introduisez d’abord le côté # des piles.
Inserte primero el lado # para cada pila.
Inserire prima il lato # di ogni batteria.
Introduza primeiro o lado # de cada pilha.
(b)
(d)
to the wall outlet
vers prise murale
a toma de alimentación
a una presa di rete
para uma tomada de parede
(c)
B
(a)
EAR
TAPE SPEED
(b)
(c)
Microphone
Microphone
Micrófono
Microfono
Microfone
BATT
> PAUSE
z
m CUE/
REVIEW M
xZ
xZ
AC power adaptor (not supplied)
Adaptateur secteur (non fourni)
Adaptador de CA (no suministrado)
Adattatore CA (non in dotazione)
Transformador de corrente CA (não fornecido)
C
EAR
TAPE SPEED
VOL
> PAUSE
n
m CUE/
REVIEW M
xZ
3
M-440
e
SECTION 2
DISASSEMBLY
• The equipment can be removed using the following procedure.
Set Lid assy,
cassette
Lid,
battery case
Note : Follow the disassembly procedure in the numerical order given.
2-1. LID ASSY, CASSETTE
Cabinet (rear)
assy
Main
board
Mechanism
deck
Head,
ceramic
top view
4
lid assy,
cassette
3
cabinet (front)
precision screwdriver
or equivalent
2 Stop the lid assy, cassette
halfway.
precision screwdriver
or equivalent
1
Note : When removing the cassette lid, put cloth on the end of a
screwdriver or use a polyacetal driver to avoid damage to
the cabinet.
9 lid assy, cassett
5 claw
6 axis
8
7 axis
4
2-2. LID, BATTERY CASE
M-440
3 two claws
2
1
2
2-3. CABINET (REAR) ASSY
Note : When installing, fit the knobs and switches.
1 two screws (1.7x16)
knob
5 lid, battery case
3 screw (B1.7x5), tapping
2 two screws (1.7x16)
5 claw
6 cabinet (rear) assy
switch
4 two claws
5
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