Sony WM-EX610 Servicing

If you are planning to service the Sony WM-EX610, you will need the part numbers of some of the components. The replacement parts usually end up costing "mega-bucks" and it might work out cheaper to buy a working second-hand player for a fraction of the price on eBay.

Sony Part Numbers

• Drive Belt (F4)
• 3-220-035-01

• HP901 Playback Head
• 1-500-576-11

• Pinch Roller NA
• X-3377-362-1

• Pinch Roller RA
• X-3377-363-1

Torque Measurements

Of course, being a professional, I have a torque meter, and can therefore make repairs more accurately. Using the CQ-102D torque meter, I measured the torque parameters for the fast-forward (FF), and rewind (REW) tape functions. The values shown below are the recommended parameters.

• FWD
• 15 g/cm to 25 g/cm

• REW
• 0.3 g/cm to 1.5 g/cm

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