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38E: dot in upper left corner of display
01-20-2020, 02:11 PM
Post: #12
RE: 38E: dot in upper left corner of display
(01-20-2020 08:43 AM)jebem Wrote:  Remove the batteries.
Check your multimeter by shorting the two probes in low ohm scale and take note of the reading (this value is to be subtracted from the next procedure readings).
If the resistance measured between each battery contact and the corresponding PCB pad is above 0.3 ohm, there is a conductivity issue that needs to be addressed.
In this case, use a external battery holder (or power supply) to apply the voltage directly to the PCB, to confirm the issue.

Excellent tips, thanks. I will definitely do that if I get brave enough to remove the plastic spine and let all the chips fall loose. Smile (Mine isn't a later soldered model.)

Annoyingly, the power input pads on the PCB are buried under the plastic spine so it's pretty much impossible to test them or solder replacement wires without really tearing the thing apart.
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RE: 38E: dot in upper left corner of display - Dave Britten - 01-20-2020 02:11 PM



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