| Electronics > Repair |
| Blaupunkt CR-4096 AM/FM/Cassette playing speed too fast |
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| Uunoctium:
this chinese seller offers a lot of pinch rollers and transmission belts for cassette decks. Packed in lots of 50 or 90 pcs with different diameters https://www.ebay.de/str/chocalaestore |
| Stray Electron:
At one time there was a series of radio repair manuals that were being printed for repair shops by the name of Sam's Photo Facts or something close to that. Each book typically covered about five models and there were hundreds of volumes published. There is a very good chance that one of the volumes covers your model. Do some looking around on the net and see what you can find. FWIW about fifteen years ago I passed up a set of about 170 the books because they would have literally filled up a closet! |
| bostonman:
A 70s cassette that plays too fast? You got quite lucky because I had a car that was five-years-old and it played fast. I brought it to one or two repair places, but they never fixed it. Eventually I upgraded the stereo system so the issue never got resolved. |
| floobydust:
OP, you know the little circuit board the motor connects to, is the speed controller. I don't see a tachogen for feedback so it must be motor back-EMF? The board has a trimpot to adjust motor speed. But if yours is way fast then the power transistor could have shorted. How I used to calibrate speed, is record a test tone say 10kHz on a cassette deck that I know has correct speed, musicians can tell right away if pitch is off. Then put the cassette in the deck and adjust speed until a freq. counter reads correctly. |
| Jeff eelcr:
Belts, PRB Projejtor Recorder Belt Co. SAMS Photofacts, AR Radio Series. Jeff |
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