Audio Technica AT-LP60X turntable does not switch on

[Francesc V.]

Hi:

I bought this broken item for trying to repair and it simply doesn't turn on.
I've seen that input is shorted, and I guess that is because of this diode.

Which diode is BG 1F77V?



Thanks in advance,
Francesc.

[R_J]

Re: Audio Technica AT-LP60X turntable does not switch on

BG is a Bi-polar tvs diode used for protection. SMBJE13CA
If you have the correct voltage and polarity adaptor, you can remove the shorted diode to test the operation of the turntable, but it should be replaced to provide future protection.

It is likely that someone used either too high a voltage or wrong polarity adaptor and the protection diode shorted, as it should.

[Francesc V.]

Re: Audio Technica AT-LP60X turntable does not switch on

Thank you so much for the feedback. I've replaced with a M7 (1N4007).......that I guess it won't do anything for protection. I already ordered the one you mention :-)

Now it turns on again!! However I need to see why the right channel doesn't sound. I've already checked the 4 wires that come from the "needle" to the PCB and they are ok.
(pcb has 2 positions "phone" and "lineout".....first one is a direct conection to preamp.)

So, it's the needle itself or the shell..........will see.

Regards,
Francesc.

[alfatv]

Re: Audio Technica AT-LP60X turntable does not switch on

You can remove that diode, but make sure 12V power supply is good.
Most likely it's TVS, pick one with same size and slightly higher voltage rating than power supply.