Sony wm ex 658 service manual
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Page 1
WM-EX658
SERVICE MANUAL AEP Model
lawman
\ came"
Dolby noise reduction manufactured under license from Model Name Using Similar Mechanism WM
DOLBY and the double-D symbol m are trademarks of Tape Transport Mechanism Type MT-WMEX633-112
Dolby Laboratories Licensing Corporation.
SPECIFICATIONS
Tape player section and general
Frequency response (III NR switch off)
30-l 8.000 H2
Output
Headphones (Q REMOTEjack)
Load impeadance 8-300 ohms
Power output
SmW + 5mW at DC operation
Power requirements
I.5V DC
Rechargeable battery tNC-6WM). |.2 V. 600mAH. Ni-Cd) One R6
(size AA) battery
Battery life (Aprrox. hours)
Rechargeable NC-GWM 9
Fully charged
Sony R6? (SR) 9
Sony alkaline LR6 (WM) 33
Rechargeable NC'6WM 40
Sony alkaline LR6 (WM)
Used together
Dimensions
Approx. 108.6x78,6x2|.5 mm (w/h/d)
Weight
Approx. l40 g (Main unit)
Approx. 225 g (incl. Headphones with remote control. Rechargeable
battery NC-6WMtS), Tape (C«6OHF)
Design and specifications are subject to change without notice.
CASSETTE PLAYER
ONY;
MICHOFILM
Page 2
TABLE OF CONTENTS
Specifications 1
1. GENERAL
Location and Function of Controls ........................................ 3
2. SERVICE NOTE 4
3. DISASSEMBLY 6
4. ADJUSTMENTS
4»l, Mechanical Adjustments
4.2, Electrical Adjustments ..
5. EXPLANATION OF ICTERMINALS 9
6. DIAGRAMS
6-]. Printed Wiring Boards
62. Schematic Diagram
7. EXPLODED VIEWS
7- l . Cassette Lidet Case Section ..
7~2. Audio Board Section ..
7-3, Mechanism Deck Section (MT~WMEX633-l 12) .
23
8. ELECTRICAL PARTS LIST
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 cir-
cuil board (within 3 times).
° Be careful not to apply force on the conductor when soldering or
unsoldering.
Notes on chip component replacement
0 Never reuse a disconnected chip component.
° Notice that the minus side ota tantalum capacitor may be dam-
aged by heat.