Convection mod of T 962A oven with hot air fan, manual override switches
first taking off the top cover which was screwed down with 4 scres that were below the amulinum tape, but easy to locate
hot air oven fan 230V AC motor
open compartment with the IR tubes exposed, I measured those below the rated power, maybe replace later IR camera test will follow to see if the boards heat up evenly
fan blade made from aluminum, have simple bent it so it fits below the IR tubes and the compartment top cover
I removed both thermocopuple tubes and placed the fan in the middle of the compartment, the sensors get later mounted on dummy PCBs as just measuring air temperature gets inaccurate readings
as the compartment is from thin steel, so I used a 4mm aluminum plate that I found in my used metal box, already marked the drill spots using the old mounting plate
I used 5 washers to lift the mounted fan motor enough to clear the IR tubes, holding it in place unscrewed fitted,
screwed down it was stuck on the IR tubes but as I had about 2mm distance from fan wheel to the cover
I added one more 1mm thick washer and that was enough to make it spin freely
hot air fan switch and manual override of cooling fan and IR tubes
proper holes made for them, but I might buy another switch for the fan so I can manually disable the cooling fan when IR tubes are manually on
will see if the profiles work good enough so no manual heating on the end of the cycle is needed
wiring switches with heat resistant silicone wire
drawer was modded with lifted PCBs, simply 3mm screws with fitting washers and threads cut in the PCBs
so the boards are thermally decoupled from the drawer
the bigger one got the 2 original thermal probes attached with SMD hot glue
full Modding description here http://budgetlightforum.com/node/66551