Classic Garrett Groundhog circuit board help needed

[SVEN1]

Recently picked up a non working circa 1986 Garrett AM-2 VLF/TR detector.
Found some broken and chipped resistors, decided to replace them all with new metal film resistors as well as the three electro caps.
I noticed on this particular unit Garrett decided to grind off the IC chip identification numbers. Makes it hard to replace the IC's if you don't know what they are.

I know the Groundhog series is very popular in Oz, maybe by chance someone here also has a AM-2, possibly with the IC number not ground off. If so would it be possible, if you so please, take clear pictures of the circuit board with the IC's. Or does anyone have a schematic?

Thanks

[SVEN1]

Obtained the IC ID numbers.
Another hobbiest had identical unit still with the numbers on the IC's

[Rwork]

Hope you get it working,i never used that machine and not familiar with the number.  The unit similar that found the  "hand of faith" is still here in Vic.  A2b probably.   Needs a battery box. 

[jackthehound]

G'day SVEN1, not sure if this may help you, have a look on the Treasure Enterprises of Australia website. David is having a sale and retiring after over 30 years in the detecting game and has got all sorts of spare parts including resistors,capacitors, and PCB's as well. Hope you find what you are looking for.  Cheers jackthehond

[SVEN1]

Found all the info I needed on the IC chips. I did rework the board with new resistors, pots and several caps. Reassembled the unit and it did work to some extent, looks like there still is a bad part on the board. Going to assume it might be one of the chips. Would have to check it out. Unfortunately decided to use it as a parts machine. The housing and shafts are going to be used for another project. The coil makes a good back up for my two other Garrett Groundhogs---Gold Hunter and S-4.