Here is
a new HS OPCOM 1.59 interface.
I did
not connect on either the USB or the 12Vdc ... prudent and I have no idea of the problems it is neither the circumstances in
why it
happened.
After dismantling, failure is immediately visible:
The
input capacitor of 22μF 12Vdc on to explode. This is the second I see like
this!
So I
replaced with a 22μF (226 / 35V) with a voltage withstand somewhat higher.
We can
see the black traces from that exploded on the LEDs media
I will
then check SS14 diode (Schottky) but before a bit of a multimeter to check
continuity between 12Vdc input pin
and the
anode No continuté ..... It's weird at first seen on the map, no problem but if
we look a lot closer,
under the white connector:
It is
hard to see and I have to have the heart net so the connector is removed
(without desoldering) taking care not to tear anything:
And voilou, here we see better:
The
track has fuse board; Normal designers OPCOM not have any protection on this
interface
Input
12Vdc vehicle (big mistake)
It also
checks the diode, therefore the Schottky voltage drop of around 0.2V across it:
Come on, we fix all this:
It all goes back and test the interface table:
On
connection of USB, the red LED lights; I run OP COM china clone
2012 version
and make
a test of the interface:
It works
(FW 1.39) ... I connect a 12 VDC power supply.
A small selection of vehicle diagnostics on a
computer:
Relays
slam is a good sign!
It
remains to make a real vehicle test to confirm operation ....
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