Hello and asking for help with HP 67 power unit

[AndiGer]

I'm no expert in electronics. As Jacques Laporte explains Vgg is derived thru C1/CR6 and C2/CR7 interaction. C1 and C2 are 2.2µF tantalums. I think those are the small black ones in the picture shown at http://home.citycable.ch/pierrefleur/Jac...ceDeck.htm
(also seen as black ones in pictures from Alberto).
Correct me if I'm wrong. Colour code is not always on the parts I found out.