I have a panasonic cd stereo system SA-PM17. It's good, but i cannot turn it off. when i press turn off button, it turn off. then, i automatic turn on again in seconds. how to fix it

The versus Google query is useful

https://www.google.com/search?q=Panasonic+SA-AK750+vs+Panasonic+SC-AK750

which leads to

https://www.kleinanzeigen.de/s-anzeige/panasonic-sa-ak750-hi-fi-stereo-tape-usb-5x-cd/2580715678-172-2463
and
https://www.bhphotovideo.com/c/product/487963-REG/Panasonic_SC_K750_SC_AK750_660W_5_CD.html

And the manual explains they are the system and the main unit

System (model name) SC-AK750
Main unit (designation) SA-AK750
Front speakers SB-AK750
Subwoofer SB-WAK750

Here is the manual

Panasonic SC-AK750 Operating Instructions Manual

ManualsLib https://www.manualslib.com > manual > Panasonic-Sc-...

View and Download Panasonic SC-AK750 operating instructions manual online. Philips CD Stereo System Operating Instructions. SC-AK750 stereo system pdf ...

CD Stereo System

Panasonic https://www.panasonic.ca > ALL > rqtv0200-p
These operating instructions are applicable to the following system. System. SC-AK750. Main unit. SA-AK750. Front speakers. SB-AK750.

Here is the remote control for it.

https://www.google.com/search?q=panasonic+sa-ak750+replacement+remote+control

..

Service Manual, you need to test and/or replace.

Panasonic SA-AK47 Service Manual - ManualsLib

https://www.manualslib.com > manual > Panasonic-Sa-...

View and Download Panasonic SA-AK47 service manual online. SA-AK47 stereo system pdf manual download. Also for: Sb-ak47.

• 
  

  Panasonic SC-AK47 Operating Instructions Manual

  https://www.manualslib.com > ... > SC-AK47
  
  View and Download Panasonic SC-AK47 operating instructions manual online. Mini Stereo System with 5-CD Changer. SC-AK47 stereo system pdf manual download.
  
  ..

replace control board

This does happen with CD trays, it's quite common. I can't remember the exact mot common cause, but it's some worn out part, such as a small (plastic) cog wheel. Search on "cd tray won't open" on the internet to find a multitude of reasons, most to do with computer CD trays, but I guess the mechanism is essentially the same. These may also describe ways round the problem.
Some CD players have a small hole on the front near the tray into which poking a straightened out paperclip should enable you to open the tray by a few mm, enough to be able to pull it open in an emergency - but it's awkward to do on a frequent basis.

5.May.2014

there is hardware problem check out solution in https://www.triveditech.com/

The problem is in the audio output ic, it is loading the unit into shutdown. The only option is have the ic in the stereo replaced.

your system isn't turning back on it is a demo screen. find the button that says something about a demo and press it while the system is off. if that doesnt work press and hold the button while the system is off. if that doesn't work refer to your manual on how to shut off the demo

press the enter and number 1 button on remote simultanously

Hi. Got the very same problem. At christmas I had loaded two cd's in one of the racks. I used needlenose pliers as well and pulled each of the 5 trays out (well past their runners). Tried to dismantle the unit with the 3 screws on each side, but gave up. When I turn the power off and on and do a cd check the "hello" flashes then nothing, tried cd/change power button and basically everything else. All I can say is go easy on the unit as I was to forceful an now think i've ruined it. I'm gutted as this was a great mini hi-fi and has served me well. Best of luck with ur Panasonic, cheers.

F61 Power Amp IC output abnormal
Upon power on,
PCONT=HIGH,
DCDET=L after checking
LSI.
For power.
Press [STOP] on main unit for
next error.