How do I connect Onkyo cassette deck TA RW 470 to Onkyo receiver TX 903?

Take it to a local audio repair engineer. There may be a broken drive belt. Or take the case of and take a look.

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cassette tape stops 5 seconds

Hi,
I can give you this link. You can download the service manual of this Onkyo. I hope it will be usable for you.
When you get to the site using the link it is possible that you have to wait a little bit to be able to download.
After waiting you should see a button as "Get Manual" and simply click on it and save the file.
Thanks.
gylacz

Can't find it but I imagine just about any one would get you going.

http://63.148.251.135/redirect_service.cfm?type=own_manuals&file=TA-RW255_En.pdf

I have found a service manual for you that can be downloaded free:

http://elektrotanya.com/onkyo_ta-630m-sm-tape-deck.pdf/download.html

After the page is appeared fully, click on this place:

Get Manual
Not logged in
Only 2 downloads
allowed a day

and the downloading will begin.
Good luck!
gylacz

Sounds like the cassette tape itself is too tight to play, try fast forwarding or rewinding the tape in the deck all the way to the end of tape several times before trying to play. This may solve the problem

HELLO

By the fault you describe this sounds very much like a belt problem. Take the case off the deck and check the belt(s). Some decks can use more than one belt and you need to look at their condition.

Are they too slack around pulleys maybe? Belts don't last forever and I'm not too sure of the age of your deck. But personally, I would change them all.

Make sure the tape path is clean as well, clean heads, pinch roller and capstan.

i bought some today from **** smith electronic store , i paid $7.97 for a pack of ten assorted sizes

The best cleaner for heads is Servisol Video 40. You can get it from Maplin's UK or Amazon.

The gearing and rubber parts involved in FF or REW vs. play are different. This unit should be overhauled and all of the rubber parts replaced.
Dan