For Owners of any model of Technics Piano
Technics SX-PX1 help with repair
I receive a SX-PX1 as donation and want to repair it to keep it in my house. It is really beautiful!
After a quick look in the system the following issues were found:
1- 3 dead keys
I cleaned the contacts and now are working.
2- Volume potentiometer not working.
It’s not possible to adjust the volume, but I can hear it. I tried the HF jack, line out and effect output. Is that normal?
I dessoldered the potentiometer from the PCB and it is working.
Other pots in the PCBA are working normally.
3- “Ticks” in the sound
When a key is pressed, a constant “Tick” start and keep for some seconds after the key released.
I could remove it when the input ground pin in the Filter PCB is left floated.(CI LM1894N)
I also noticed that just one channel have this click.
I believe that issue 2 and 3 are correlated. I requested some components to change, but everything that I’m doing is empirical because I could not find a service repair manual or even the user manual.
So, I would like to ask if some have any kind of information to help or where I can download/buy the service repair, I will really greatfull.
Thanks in advance,
Ps. Later I will attach some photos of what I did.
- You must be logged in to reply to this topic.