help with Service Manuals

[taiheiyo]

Dear Iqbal Haroon
There is no good PCB diagrams provided in S226P wiring diagrams.
So I had to read wiring diagrams from sheet detectors to every plugs, connectors.
Then I found detectors were connected to large PCB inside delivery operating panel in drive side.
I am not have notes now but my memory says Toshiba TD62083AP and/or TD62084AP.
If you can not identify which UL driver for sheet detectors, change them all.
If you have a tool like Huntron Tracker, you can find which UL driver is causing your problem in matter of minutes.
Those are not expensive ICs and easy to replace.
Before power up you should check detector wires and cables because UL driver may have been damaged by short circuits and bad connections.
But I remember one thing clearly, it was pain to put delivery panel together.