DON'T DO THAT! Put it into your junk box, instead! If you ever
build another, there are lots of salvageable parts that are
useful.
Paul -- AI7JR
On 9/28/23 04:36, GIUSEPPE wrote:
toggle quoted message
Show quoted text
hi Evan, thank you very much, I looked for a short
as you described and I didn't find it, only between Vdd and Gnd
of the 3.3v card both with the card inserted and without the
card it gives me a short, I don't know which Do.? And to think
that the QMX was turned on for a short time.? I hope there is
some other way to troubleshoot, unfortunately I don't have an
oscilloscope for better troubleshooting.? I mean I'm going to
throw it all away in the trash.? Thank you and good day
Giuseppe iu8eun
hi Evan, thank you very much, I looked for a
short as you described and I didn't find it, only between
Vdd and Gnd of the 3.3v card both with the card inserted and
without the card it gives me a short, I don't know which
Do.? And to think that the QMX was turned on for a short
time.? I hope there is some other way to troubleshoot,
unfortunately I don't have an oscilloscope for better
troubleshooting.? I mean I'm going to throw it all away in
the trash.? Thank you and good day
Giuseppe iu8eun
Il Gio 28 Set 2023, 07:22
Evan Hand <
elhandjr@...>
ha scritto:
Hi
Giuseppe,
There is no sure way other than to try to isolate the
problem.? If it is the MPU, the only choice is a new kit
(you can save the cost of a new enclosure).? I did this by
removing all the boards from the mainboard and measuring
the resistance between the Vdd pin on the mainboard to 3.3
volt SMPS.? It was shorted.? This meant there was a short
on the main board that was causing the problem.? I started
to remove components from the mainboard that use the 3.3
volts, measuring the resistance each time until the MPU
was left.? Since the short was still there, I gave up and
assumed the main processor was toast relegating the kit to
the parts bin.
73
Evan
AC9TU
Paul - AI7JR