BKF 12, error 12 & 30. R705

I'm looking for a circuit for bkf12. The problem is error 12 and 30. Appears 5-7 seconds after turning on the power.
Any ideas.

 

Hi sir:
Where is the errors appearing:
1) Feeder operation panel 2) printing unit 3) operation panel delivery 4) or others like ink zone keyboard?
Blessing
superchock@yandex.com
Mobile+WhatsApp:+505 8861 1441

 

CHOCK, error 12 end 30 can appears only on BKF.
....I'm not a printer.

 

Hi sir:
I did saw the problem in the main drive BKF 12 in Roland 705:
1) # 12: armature Voltage value at UA= 0V is false( Measuring during boost) ; Application: RESET!
2) #30 Offset error armature measurement(determined during boost), armature measurement disturbed or defect: No controller posible= RESET!
Blessing
superchock@yandex.com
Mobile+WhatsApp:+505 8861 1441

 

There is no armature tension. K50 is not active. Parameter 61 changes values from 0 to 95%. The problem is in the main board, the rest I've checked. it is good, but I do not have a circuit diagram.
This is the problem.

 

ok, Great .
Proceed with K50, parameters.
and repair or replace MOBO.
I do no have schematic d, maybe you have some friend or colleague_
Blessing
superchock@yandex.com
Mobile+WhatsApp:+505 8861 1441