Thank you for contacting me Michael.
The Dell Printer I have does not appear to have tabs at the front to open the front cover. It is a Dell 1350 cnw. There are tabs to open the right side cover where the ink cartridges are and a back tab to remove jammed paper.
Please advise. The printer in Fig 1 does not look like the Dell I have.
It is nearly 5 hours since I sent you an email advising that your recommendations were not helpful.
Please let me know when you expect to be in a position to give me a fix to my problem.
I have taken down the back cover. I cannot see two sensors as you describe.
Can you send me a diagram showing exactly where these two sensors are?
The problem is now fixed!
I had a subsequent problem with paper jamming!
However this problem appears to be fixed now!
Many thanks for your help.