[Snarf81]

You need to take off the circlip on the left, then slide out the metal rod enough to lift the pulley slightly, then with a bit of wiggling you can get the old belt off and the new belt in, but be careful not to loose the small black plastic shim that fits between the pulley and metal bracket.

If there's no light bulb illuminating when you power on the player then the cassette bulb has blown which will mean no tape transport.

Good luck

Richard.