
Description
Replacement belt kit for Sony CFS-J711 cassette deck.
This kit is suitable for repair or maintenance when the original belts are worn, stretched or degraded.
Compatible brand: Sony
Compatible model: CFS-J711
Device type: Cassette deck
Package contents: 3 x Square Drive Belts
Condition: Brand New - Factory Fresh
Warranty: 5-Year Warranty: Guaranteed against manufacturing defects and material degradation.
Before installing new belts, clean the pulleys and flywheels to remove any residue left by old or degraded belts.
Note: This is a compatible replacement part and not an original Sony spare part.
Difficulty
Easy to moderate · typically 15–45 min for a first-timer with basic tools.
Tools needed
Phillips & flat screwdrivers, plastic tweezers, isopropyl alcohol (90%+), cotton swabs
Common mistakes to avoid
- Handling the new belt with bare fingers — skin oils cause slipping. Use tweezers or clean hands with alcohol first.
- Not cleaning old belt residue off the pulleys — degraded rubber turns to goo and the new belt will slip. Clean every pulley with isopropyl alcohol before fitting.
- Forgetting the routing — take a photo of the old belt path before removing anything.
- Twisting a flat or square belt during fitting — it must sit flat in the pulley groove.
- Overstretching the belt while installing — walk it gently over the pulleys instead of pulling hard.
If the old belt has melted into tar, remove all residue completely first — a lighter fluid–damped swab works on stubborn goo, followed by isopropyl alcohol. Let everything dry before fitting the new belt.
Stuck mid-repair? Send us a photo of the mechanism — free specialist support by vintage audio repairers.
Sony CFS-J711 Cassette Belt Kit for Portable Boombox
- ✓ Free 30-day returns
- ✓ Fast worldwide shipping
- ✓ Secure checkout
Shipped from Portugal. Select your destination to see estimated shipping options.
* Delivery estimates use working days, Monday to Friday, excluding National Holidays in Portugal.
Repairing this model?
More parts for
Confirmed in the compatibility database for this exact model.