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?

 

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!

 

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

 

Hi Drukman,

Do you have green light for the run command?
when you press run the first time do you have the warning alarm?
after pressing for second time for run the contactor K050 is activated?
Do you have voltaje present at field, this voltaje must be present even when machine is standstill? how many volts you have?
for the field can you check the impedance and compare with the data on plate at main motor using ohms law.
If K050 is not activated please verify the safety relay secuence from manroland, make sure the brake is open in the correct timing, for this chec the input signal to confirm the brake is open. there is a green led that turn on in main drive to check this at same time.
please inform...

 

Guys, I had no problems with machine electronics. The problem is, what I wrote in my 1st post, in the BKF 12....... tantalum capacitor for $ 0.1