Need circuit diagram Sony TC-K511S cassette deck

have you got one cassette on play and the other on record

Get the service manual at stereomanuals dot com and then you will need the alignment tapes and other equipment to work on the deck just like a Technician does, I have been doing them for over 40 years now.

Then you should buy some.

A Tv repair shop carries a large stock of belts, probably a good place to start. The other option is order from Sony online and ask for the Technical Department.

Try
mauritron.com

They have the world's largest library of
owners user instructions operating guides
and
technical repair schematics circuits service manuals

I'm not connected to them, just a satisfied user.
Also if you don't find your item in their listing then ask and they will get it for you

You only need to measure the diameter of each belt you need in MM. Then put the result into Google as "Cassette Drive Belt ??MM."
Belts are generally universal and not made by any one maker. You don't have to be precise in the MM also, a few either way will work. Make a note of how they fit before removing any.

Hi,
Flat belt part number is..
301657001.. BELT (CAPSTAN)
and square belt part number is...
302440501.. BELT (FR2)
Above said info are taken from TC-WE435 cassette player s/m.
Thanks.

It depend of what you want, where you want use your equipment , and the amplifier have to match your need . This mean , any amplifier can work with your sony.

try factory restore settings

yes,
check the muting circuit.if cannot fing please mail me i will tell the whicharea.
send the diagram.
to [email protected]