After swapp of ADF and formatterboard Duplex is always on - it should be selectable... How to do?

[Friedrich-Eugen]

I had to swapp my ADF, as its small eletric engine died. Follwing that I had to swapp the formatterboard. All that worked out fine. 

But: the printer now does - although it is not indicated by the system - print in duplex-mode- when ever there are two pages or more to print / copy ...
How to change this ?  

Note:

(1) the system does not indicate that it has the standard set to duplex. it just does it. 

(2) I can not change this, as I can not tell the system, which side (long/short) to use for switching page while printing in duplex-mode... 

Firmware is latest, software (HP) is latest, MS Windows is latest...

Any help welcome!!
 

[Valsimot]

From the printers internal Reports menu print Menu Structure and check settings for duplex printing. Change it later as guided by menu structure map.

[Friedrich-Eugen]

I did as You suggested... 

My Laserjet 500 Color M570dw it looks as if it is an "older" one (small display). The formatterboard has just been exchanged and has been updatet to 2022-firmware. Now the machine says (Origin?) Italy and no loger UK.
(I bought the printer in the UK in 2022 as used (above 120.000 prints) and refurbished.  It has been serviced successfully since than several times to keep and protect its printign qualities. )

The menue does only show once Duplex, (Fax-Setup and there the Topic Duplex Print) and there it was not active, which I did understand as no Duplex-print via Fax.  

The printer (laserprinter) does however - as a standard - print in duplex mode, it does not allow a change and it does not allow to adjust the way it turns pages over. 

Does this indicate the need for a complete reset of the printer?  Would that work?
Why can't I correct these settings?
How can I manage my printer via Printerhompage and my private network at home?

[Valsimot]

Can you scan printed Menu structure and post it here?