Schematic help.

Hi Im rusty on my schematics, help needed.
I am trying to decipher the DB-2 board on a 2275-130 (specifically which of the 5x 20uf capacitors are which: C34,35,36,42,43).
On the board I see two chips in their large heatsinks, and one small 8-pin "IC-8 LMM58" but I cannot apply / see an 8-pin symbol on the schematic, or indeed see the 2 chips either. Very strange: Im tearing my hair out trying to match my caps to C numbers you see.
Many thanks, RC

The DB-2 "driver board" if you divide above diagram into quarters is in the TOP RHS 1/4.

That's LM1458 and the IC is BOTH of those little triangle. That's the two halves of the dual op amp. If you look, they are numbered and then add in the +16v and the -16 volt contacts and you get 8. If you look, they are both numbered IC8. Mike.

Aha.. I was so confused about where pins 4 and 8 were I thought it must be two of godonlyknows what else!
Ok: so looking at the dual opamp in the board, it has a 'dip' in one end. Where is pin 1 and pin 5 inrelation to this 'dip'?
Im getting closer to ID'ing these goddam caps!! my soldering iron's been sitting waiting to pounce for 3 days, old 5 caps removed and new ones ready. So close!
thanks, rc

Here's the pinout of a 1458

Ok great- now I can try and find these damn two caps that -on the schematic- suggest to me, a 'pair' ie C35 and C36 (that join to pins 1 and 7 of the 1458.
Are these the two you referred to as the 'driver pair' you mentioned Mike? these two Ive been trying to locate for days now.

You can change this LM 1458 dual OP. It is VERY cheap ( 0.6 ?). I spent 1 year finding a trouble in my 2275-130, this OP was in short and every things was a mess, and very difficult to diagnose.