Whites 6000/DI PRO SL Meter Probs

[exciter]

Hello,
got a Whites 6000/DI PRO SL detector, but the Meter isnt working currectly in both, disc and all metall mode.
Battery Test works fine i guess.
when i turn on the device, the meter goes hard to the left side.
I measured ~-2V between Meter- and Meter+. So the Meter+ is more negativ than Meter-??
Anyone heard of this Problem???
Other functions should work okay...but not the meter.
Looked at the schematic, maybe U25 TL064 is broken??

Regards

[exciter]

Also anyone knows what are the settings for the on PCB pots like VDI GAIN, VDI CENTER and so on???
Using DeepScan 950 Coil.

[kt315]

I can find a buyer on good price. it is all I can suggest on

yours sincerely
Anatolij in Lietuva

[exciter]

Na dont want to sell...
will try to replace tl064 tomorrow...

[kt315]

good luck, Exciter.
... much people try to update their 6000 to 5900 doing manual balance. killing the detector then goes on ebay and sell. some buy it thinking they can fix out the problem without a problem... hey!... but the PROBLEM may be did NOT get up if the people gripe out THE electronics...

yours

[exciter]

Don't know what have been done with it before...
I payed 20€, so why not give it a try.
In the schematic the arrows in the pots circuit symbol are indicating the stock settings???

regards

[kt315]

IMO, on first step you could be open the box and see inside. are there any thumb-marks on PCB?

[exciter]

Someone worked at the pcb, because two caps were replaced.
I also replaced a 10nF Capacitor...was broken.
Uploaded some pictures:

http://picasaweb.google.de/tertomium/Whites6000

First it would be great how to tune these Pots for proper work...

Steffen

[exciter]

So, meter is working now, but im not sure, how to tune the pots on the pcb for factory settings...
Anyone got a picture from these on a good working device??? whould be a starting point.

thanks steffen