ManRoland 305 - GraphoMetronic

Does anyone know what this error means and how to fix it? "white calibration field; incorrect density value 0705237" (see pic attached). This code affects our sheet scanner to not start a scan, so we have to shut down press for 2 minutes and reboot for it to work again.
Any insight would be appreciated
Thx
Paul

 

Hi sir:

Please Reset the Master CPU, see that his 1) Vcc regulated power supply is in tolerance for 0.&% up or down.
2) Clock measure in MHZ for CPU.

3) Locate the pin RESET and Ground according with the CPU models, data sheet in Google, Yahoo, bing,etc

4) However measure the battery in CPU for circuit Mosfet..!! and replace if necessary if too low, according with the printed voltage in battery....!!

 

Chock I have a question regarding a Polar 76 EM…on powering up the unit turns on, the fence moves forward and then returns to the rear and the display shows “0”. Can you please offer some guidance Sir? Blessings

 

Hi sir:
First Step: Test all Regulated power Supply of machine in tolerance 0.7% up or down!!.

Blessings.

 

Thank you very much Chock!...Since veteran press operators who can troubleshoot and fix issues are far & few between these days, now I just need to find a MR technician who knows how to do all this stuff...lol.

 

It looks like a loss of position. Possible causes are dirt on the guide bearings or a damaged belt.
PP You can reset directly. There is a computer reset button under the center console keyboard.
It is not bad to write which model the densitometer is or at least the year the press was manufactured.

 

Thank you! We'll try this...

 

GraphoMetronic - FMD15
Press manufactured - 1995

 

OK.

Blessings.

 

Found the reset switch on the FDM 15 unit under the keyboard, thx guys! But the more we think about it, as it always seems to be intermittent, working after a reboot, then days later not until we reboot, then fine again for a few days...we think it may be giving us a false error code and could just use a really good electronic cleaning!