c.scope cs9000 HPX

[surfdetector]

can't unscrew HEX screws on coil ((( it is unstandart -! not 3 and not 4mm bites. something near 3.5...
must grind out one... or it is in inch standart???

Yes it will be inches. Most likely .125" if you say it is close to 3.5mm.

[kt315]

can't unscrew HEX screws on coil ((( it is unstandart -! not 3 and not 4mm bites. something near 3.5...
must grind out one... or it is in inch standart???

[kt315]

welcome. i hope with my info you will get the end result. i soldered all back now and will search the coils.

[Jose]

KT315, Thanks for the photos, I built this detector some time ago, with some doubts and improvisations. The images are very useful to me.

[kt315]

invisible track

a way of grounded: -Batt --> 8 pin U1 --> rotary switch housing --> detector housing.

[kt315]

check a BOM

[kt315]

invisible track

[kt315]

yes i will desolder rotary switch. it hard work but possible. for desoldering of phone socket i did special nozzle.
i also got TM-808 in repair.
i found a problem in C-Scope, it is the pots. they are lost a contact, in sound devices we say that as 'noised pots'.
but i did not find same type in ali for order, with the long pins. must repair.
i do not know a place where to find same rotary switch. its very specific.
i compared all components with the sch and all are matched, just two resistors seems like mixed up.
will tell later.

[chafik]

thank you for sharing .can you please desolder the rotary switch and take picture or if you know where i can find it send us link please

[kt315]

i put files in an album if someone does not see it. after some time i will
delete them. https://www.geotech1.com/forums/album.php?albumid=136

[kt315]

Hello
In the schematic cd4069 does not exist

look on right side from IC3, #14 o-scope pic.

[mmh]

Hello
In the schematic cd4069 does not exist

[kt315]

thank you Melbeta for the connection. yes, we have TM800 sch and it is very same
as i see. this is Rev E board and thinking it is last done before a closure.
pleasure

[Melbeta]

The Discovery TF-900 was originally built for Whites as TF-800 model. They had some kind of parting, and Discovery quit building the TM-800 for Whites, and Whites then came out with their own TM-808 model. So if you find a schematic for the TM-800 model, it should be identical to the TF-900 Discovery model.
Melbeta

[kt315]

pcb pics