Riso GR3770 blank prints

[tufbnme]

Customer asked me to look at their GR3770, don't have much experience with these. The machine will create a master but it is blank and there is no image on the prints. Nearest I can figure is the printhead is not working but not sure. Can someone tell me if I am on the right path or what to check out.

[laitang]

Re: Riso GR3770 blank prints

GR3770 _SW.jpg
Check the interlock switch for thermal print head

[tufbnme]

Re: Riso GR3770 blank prints

You wouldn't happen to know where I can purchase that switch do you?

[laitang]

Re: Riso GR3770 blank prints

You can temporary remove the switch then short it's circuit.

[tufbnme]

Re: Riso GR3770 blank prints

Switch tests good, printhead?

[DAG COPIERS & COMPUTERS]

Re: Riso GR3770 blank prints

You wouldn't happen to know where I can purchase that switch do you?

Don't rush to buy any part as yet! Riso parts are extremely robust and reliable. Take your time and carefully troubleshoot the problem, it might turnout to be something else. For example is the scanning lamp lighting?

[antoniovs]

Re: Riso GR3770 blank prints

Is the drum fully inked? sometimes this happens when the drum hasnt been used for a while ...