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PX-201 only outputs very quiet aux output - even after amp board replaced.

Hi, I have a Technics PX-201. I get no audible sound from the speakers and only a very quiet output over the aux output (that I need an external amp to even really hear). I thought the issue was the amp board not delivering enough power, so I replac…

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PX-201 only outputs very quiet aux output - even after amp board replaced.

mandragara

mandragara
Australia

Total Posts: 4
Joined: March 15, 2019

Hi,

I have a Technics PX-201. I get no audible sound from the speakers and only a very quiet output over the aux output (that I need an external amp to even really hear).

I thought the issue was the amp board not delivering enough power, so I replaced it with an identical working board I got off of the internet. However this did not fix the issue, with the same quiet sound being output over aux.

I'm quite stumped as I know the amp is fine and I know the tone chip and ROMs are fine as the piano plays it's keys and demo recordings perfectly well.

Any ideas?

Tags: Repair
Attachments: SXPX201_SM_TECHNICS.pdf
Posted on March 15, 2019 at 9:23 AM
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4 Replies

admin

admin
United Kingdom

Total Posts: 1055
Joined: February 2, 2014

Re: PX-201 only outputs very quiet aux output - even after amp board replaced.

Hi,

A few ideas to try.

Does the volume slider make any difference to the output?

Try disconnecting the pedal cable (maybe a bad connection from the soft pedal would make it quiet).

How is the volume through headphones?

Try playing something through AUX input, such as a CD player, how is the volume of that?

Cheers,
Mike

Posted on March 15, 2019 at 7:48 PM

mandragara

mandragara
Australia

Total Posts: 4
Joined: March 15, 2019

Re: PX-201 only outputs very quiet aux output - even after amp board replaced.

Hi Mike,

> Does the volume slider make any difference to the output?

It does, the volume scales with the slider. I've also bypassed the slider electrically and that doesn't help either.

> Try disconnecting the pedal cable (maybe a bad connection from the soft pedal would make it quiet).

Doesn't help sad

> How is the volume through headphones?

Barely audible without an external amp. With an external amp on max it's audible but with a lot of hiss, think bad AM radio.

> Try playing something through AUX input, such as a CD player, how is the volume of that?

Inaudible without an amp.

Thanks a lot Mike smiling

Posted on March 16, 2019 at 10:41 AM

admin

admin
United Kingdom

Total Posts: 1055
Joined: February 2, 2014

Re: PX-201 only outputs very quiet aux output - even after amp board replaced.

Sorry, it's beyond my limited engineering capabilities. Hopefully, someone more experienced will be able to help.

Posted on April 1, 2019 at 12:41 AM

mandragara

mandragara
Australia

Total Posts: 4
Joined: March 15, 2019

Re: PX-201 only outputs very quiet aux output - even after amp board replaced.

Thanks,

I messed up a soldering job (inexperienced) and one of the circuit boards popped, so it's of no concern anymore! New piano it is.

Kawai CA98 in polished ebony is the plan

Posted on April 1, 2019 at 7:40 AM