Sony CCD-TR818 Standby (auto power off) Bypass

[key2way]

Hello,
I have a Sony CCD-TR818 and I need to disable the auto power off feature.

I would like to use this cam for a studio cam fed to a computer capture card but after a few minutes it shuts it's self off.

There is nothing in the menu to do this.
I have the service manual.
It looks like IC502 pin 5 would be the area I need? (page 41)

Any help would be great.

John