CTC-10 adjustment lug?

[frenchy]

It is supposed to take a 4.2V battery, this adapter is set to 4.5 volts, is actually putting out 5 volts. Another adapter I have says 4.5 volts but is putting out SIX volts so am not using it. I figured 5 volts would be no big deal instead of 4.2, no (?) I was going to worry about rigging up or finding a battery that would fit after I make sure it's working in the first place.
I'm going to go thru the chassis fully now and measure every voltage that is on the schematics, and will buy a scanner this weekend so I can post the schems here and maybe somebody can point me to potential bad caps to change. At the phono plug where the mic plugs into the chassis, the schems say should be 165 volts so I'll start there...Frenchy