Heidelberg MOPV 1991 Plate register not working

[andrea De Bortoli]

all duct roller are working fine

 

[Michael Lee]

check all register keys on CPC1-02 see if they are leaky.

 

[andrea De Bortoli]

To check if the botton make continuity?

 

[Michael Lee]

check the resistance of the key after disconnecting one of the pin of the key.
it should show infinity.

 

[andrea De Bortoli]

ok now i will check that if it's the problem

 

[Michael Lee]

did any key for register work? since you have 7 keys for register.

 

[andrea De Bortoli]

all the key works and they make continuity

 

[Michael Lee]

are you on site now?

 

[andrea De Bortoli]

Here is a video showing the error 9 in the CPC and the button working fine but the register not working
https://youtube.com/shorts/xr4Wn3FNH3k?feature=share

 

[Michael Lee]

i am not talking about continuity.
check the resistance of the key after disconnecting one of the pin of the key.
it should show infinity.
if the key has leaky, will cause the key malfunction.

 

[andrea De Bortoli]

when the key is not press the key show infinite when i press the key show 0 Ohm

 

[Michael Lee]

the keys should be ok.

 

[Michael Lee]

did any key for register work? since you have 7 keys for register.

 

[andrea De Bortoli]

no any register key doesen't work

 

[Michael Lee]

so all the keys for register not working.

 

[andrea De Bortoli]

yes

 

[Michael Lee]

after i watched the video you post, all circumferential register led display for all printing units stay at negative max position, but 7 segment display for circumferential register at the bottom shows different number.
i am sure that if 7 segment display for circumferential register at the bottom shows around 0 , the led display for circumferential register at the top should show zero.

 

[Michael Lee]

after i watched your video again, found circumferential register for printing unit #1 and #2 and #3 don't match at both top and bottom led display, but both led display at top and bottom for circumferential register at printing unit #4 match up.
I can't see circumferential register number at 7 segment display at printing unit #4, maybe it is -1.08?

 

[andrea De Bortoli]

Also the 7 segment display doesn't change numbers and the position stayed the same

 

[Michael Lee]

maybe feedback potentiometer for circumferential register printing unit #1 and #2 and #3 missed positive voltages supply.