Sony M-640-V, M-645-V, M-647-V Service manual
M-640V/645V/647V
SERVICE MANUAL
Ver 1.0 2001.02
SPECIFICATIONS
US Model
M-645V/647V
East European Model
E Model
Chinese Model
Tourist Model
M-640V
Model Name Using Similar Mechanism M-530V
Tape Transport Mechanism T ype MZ-530V-99
9-873-059-11 Sony Corporation
2001B0500-1 Audio Entertainment Group
C 2001.2 General Engineering Dept.
MICROCASSETTE
TM
-CORDER
M-640V/645V/647V
TABLE OF CONTENTS
1. GENERAL ................................................................... 3
2. DISASSEMBLY
2-1. Disassembly Flow ........................................................... 4
2-2. Lid Assy, Cassette ........................................................... 4
2-3. Lid, Battery Case ............................................................ 5
2-4. Cabinet (Rear) Assy ........................................................ 5
2-5. MAIN Board ................................................................... 6
2-6. Mechanism Deck (MZ-530V-99) ................................... 6
2-7. LED Unit ......................................................................... 7
2-8. Head, Ceramic (HRPE901)............................................. 7
3. MECHANICAL ADJUSTMENTS ....................... 8
4. ELECTRICAL ADJUSTMENTS......................... 8
5. DIAGRAMS
5-1. Block Diagram ................................................................ 11
5-2. Printed Wiring Board ...................................................... 12
5-3. Schematic Diagram ......................................................... 13
6. EXPLODED VIEWS
6-1. Cabinet Section ............................................................... 14
6-2. Main Group Section ........................................................ 15
6-3. Mechanism Deck Section (MZ-530V-99) ...................... 16
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.
7. ELECTRICAL PARTS LIST ............................... 17
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIA GRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
2
SECTION 1
GENERAL
M-640V/645V/647V
This section is extracted from
instruction manual.
3
M-640V/645V/647V
)
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SECTION 2
DISASSEMBLY
Set
Note: Follow the disassembly procedure in the numerical order given.
Lid Assy, Cassette
Lid,
Battery Case
Cabinet (rear)
Assy
2-2. LID ASSY, CASSETTE
top view
4
lid assy,
cassette
3
cabinet (front)
Main
Board
precision screwdriver
or equivalent
Mechanism
Deck
(MZ-530V-99)
2
Stop the “lid assy, cassette”
halfway.
precision screwdriver
or equivalent
Head,
Ceramic (HRPE901
LED
Unit
7
boss
6
boss
8
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, cassette
5
claw
4
2-3. LID, BATTERY CASE
3
two claws
2
M-640V/645V/647V
2
1
2-4. CABINET (REAR) ASSY
Note: When installing, fit the knobs and switches.
1
two screws (1.7x16)
knob
4
lid, battery case
3
screw (B1.7x5), tapping
2
two screws (1.7x16)
5
claw
6
cabinet (rear) assy
switch
knob
switch
4
two claws
5
M-640V/645V/647V
2-5. MAIN BOARD
1
8
mic assy
Remove two solders.
9
lock, serrat IB
2
Remove two solders.
0
lock, serrat IB
3
Remove four solders.
4
Remove two solders.
qa
MAIN board
5
Remove two solders.
7
Remove the solder.
6
Remove four solders.
2-6. MECHANISM DECK (MZ-530V-99)
•
How to apply the belts
flywheel assy
belt (counter, tape)
belt (flywheel)
M901
1
5
mechanism deck
(MZ-530V-99)
2
button (REC)
3
button (PLAY)
4
button (STOP)
6
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