Sony Cassette Deck Repairs
High end Sony deck from late 1970's. This would ff & rewind but not play. I found many dry joints on the transistors on the heat sink behind the cassette mechanism and on the right hand circuit board with the signal section.
This would make a noise when trying to play a cassette, the small 24 mm belt inside the mechanism needed replacing.
This did nothing but power up, no drive to the tape etc. This uses idler drive for transport except for one belt for rewind and a belt for the tape counter. The pivots had solidified themselves with the grease and needed freeing, a general re-greasing sorted everything except for one speaker that refused to work which was caused by a faulty 3.5 mm plug.
This was a 10 cassette jukebox (auto changer) which did precisely nothing. The worm gear which drives the cassette in\out of the play position had locked up. Two of the small (18mm dia) belts were needed. The capstan belt was replaced (72mm dia) as the deck was not auto reversing. The deck started playing up, only accepting the same cassette continuously, the micro switch on the right-hand side of the gear mechanism had a bad solder connection.
This didn't move the tape in play, as with most Sony stuff I expect the unexpected! The capstan shaft was loose in the flywheel, glued it back in, some (most) Sony stuff is so s**t. Another wouldn't play tapes, the motor was faulty. The anmt10 from CPC are a direct fit for this and many others.