Platemaker troubleshooting (JET A4)

We have two platemakers in our storage and I recently started to test out our A4 Jet model. I’ve performed a few test runs and just started to hone in on calibration for a nice sharp plate. Then it started to leak water onto the lightbulbs…I pulled out the brush in the wash tank and saw a lot of corrosion; there are several places where the leak could be from. It could also be from the drain pipe under this. I am prepared to replace, polish and seal but I’m hoping to save some time with a schematic. Does anyone have any experience taking this apart? Am I supposed to access the drain by removing the light fixture under the wash tank or is there a way to open that back door?

Much appreciation,

Necole

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