Look for answer on CScope schematic.

[Guzzi]

Hello all

I was reading a Cscope TR 770 schematic for an repair. On the schematic the 4 9Volt batteries were in series, 2 x 2, but in the Detector in parallel. I know from school this is not wise to do. The technicians from Cscope are no fools, but why this?

regards

Leendert

[homefire]

Guess they needed 9V . 4P (Parallel) provides more Amp Hours.

[kt315]

no data on this detector breeds speculation.

[kt315]

[Guzzi]

Yes this is the schematic i used, batteries in series, but in the detector in parallel.
Strange, and this is the third machine i had in repair with the batteries parallel.

[Carl-NC]

If the schematic is right, then there is no way they can be in parallel in the circuit.

[sinclairuser]

a lot of old cscope designs use 2 9v or 4 9v cells, in the case of two cell units, one battery provides 9v+ the other provides 9v- thats how they work old tech but functional, the 4 cell units work the same way but but use 2 cells in each "bank" to give more oomph!.

[kountzero]

Sorry to bump an old thread but would this be the case on all the circa 1980/90s tr models? Cant find schemstics for love nor money for these old beasties.
found an old one with half the wiring to the battery connectors adrift.

[Xtrem]

Sorry to bump an old thread but would this be the case on all the circa 1980/90s tr models? Cant find schemstics for love nor money for these old beasties.
found an old one with half the wiring to the battery connectors adrift.

See here..

https://www.geotech1.com/forums/show...&highlight=660

CS660 is the same with 770 but without the meter.