Sony TC-KA6ES transport woes.

[Michael Maurice]

I am trying to repair this machine, I've replaced both belts. The problem is that when you play is selected, at first the tape heads dont fully move up to the tape, I then found that after a while I could get the heads to move up to the tape but the take up spool doesn't rotate.

I've tried cleaning the mode switch ( without dismantling it) by spraying switch cleaner in it but it hasn't cured it.

I've tried it with an empty cassette shell but again the take up spool doesn't rotate.

If the fault is the switch, where can I obtain one?

[paulsherwin]

I don't know this deck at all well, but does it have mechanical 'soft touch' controls rather than electronic ones controlling solenoids? Such mechs are prone to jamming and erratic operation as the lubrication dries out, particularly if used in a dusty environment. The only real solution is to dismantle, clean, relube and reassemble the mech, which is a pig of a job as there will be many small parts and springs.

[Michael Maurice]

It does have touch controls, I don’t think its mechanical.

[Red to black]

It is electronically controlled, it uses 3 separate chains of resistors to sense which key has been pressed, although that doesn't really help you with your current problem.

This is a complicated machine with separate servo control for both the capstan and loading motors as well as electronic torque control for the reel drive motor.

The 12.4 volt line is common to both the loading and reel drive systems, the Capstan Servo/drive has its own 9.6v rail.