A horrible electronic - absolutely non-automotive concerning components, layout and soldering.
All solder joints look bad, no pronounced, shiny solder meniscus visible. => reliability problem , will fail temperature shock test (1000..2000 cycles)
It's also eye-catching, that the chicken food (R + C) all sit askew on their pads.. too small capillarity.. obviously the reflow soldering profile / peak temperature was too low, or the solder depot was too less.
Or has this PCB been soldered manually??
Look at these gruesome bodgers of the H-bridge drivers!
The pad geometry of several components are really bad, especially many power components have too small pads, or not sufficient cooling area.
On top side, the big 22 Ohm resistor has no copper cooling area at all. (The heat normally is dissipated to 90 % over the solder junctions into the cooling area.)
The solder junctions look, as if it already de-soldered itself.. getting too hot.
The big size of this component is also critical, as it will destroy the solder junction simply by temperature changes (mismatch PCB vs. resistor ceramics).
All these glass diodes are also no preferred automotive components, due to reliability issues.
This big axial electrolytic caps is no-name.. also bad..
The SMD UHF type maybe from Nichicon, that would be ok.
On the bottom, the crystal quartz is absolutely not suited to automotive vibration requirements. (1G .. 5G)
If this is a powertrain electronics, not at all.
The legs of this construction are sharply bent and will be torn very soon.
Even if this electronic is sold as an aftermarket product, it should anyhow fulfill basic automotive requirements.
If this is intended for a 4W drive function, it's even dangerous.
Frank
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