Samlex SSW-2000 Pure Sine Power Inverter Repair: Part 2

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Bassguitarist1985

10 жыл бұрын

The entire DC input section is shorted. 6 out of 10 fuses were blown. These are a pain in the balls to remove being they are not socketed but directly soldered to the board.
***The gamble is for the cost of parts and my hourly labor to get the input section rebuilt. There is no way to tell if the drive circuitry for both the input/output stages was damaged. I can fix the drive circuitry boards however if I have to do that, the cost is over half of what this inverter costs new. The owner of this unit may/may not want to go ahead and repair it.

Пікірлер: 15

@user-se8st1og4c 8 жыл бұрын

sr what is the transistor code in input section and output section

@Speedracer415 8 ай бұрын

Hey, the guy that is 9 Years behind. Where did the 2 grounds screw in ... Please and thank you

@Bassguitarist1985 8 ай бұрын

I dont recall. Maybe to the heat sink? Apologies.

@ixamraxi 9 жыл бұрын

Just a note, fuses *should* look like dead-shorts, so if your inputs indicate a short, that suggests, instead, that at least some of the fuses were still good (and that some *other* components in the circuit are shorted), It doesn't indicate that some of the fuses are bad. If your inputs had been open/infinite resistance, *then* it would have suggested the fuses were all blown.

@Bassguitarist1985 9 жыл бұрын

Amra True fuses show a dead short, but not wanting Murphys Law to hit me because i didn't check all the fuses I removed and inspected each one. Without the daughter board installed it did not hold the FETS to ground keeping their gates closed. Applying DC voltage to the input without the daughter board I realized only later was causing an avalanche effect and caused the resistance to lower and cause the FETS to overheat because they were not shutting off like they should in the push/pull config in the boost stage.

@ixamraxi 9 жыл бұрын

***** Yeah, removing them all, given their location, was probably the best course of action, and doing so would also indicate which areas of the board to inspect first (i.e. the areas protected by the blown fuses are more likely to have faulty components). Watched the whole series, nice to see you were able to get it going, got lucky on that daughterboard working in the old ones place!

@gearup603 9 жыл бұрын

one like. what it the part number for the mosfet power output side? irfpXXX

@Bassguitarist1985 9 жыл бұрын

IRFP4332PBF for the output transistors, and IRF3205PBF for the input transistors

@user-se8st1og4c 8 жыл бұрын

sr can you give me the numbers of the transistors ....

@Bassguitarist1985 8 жыл бұрын

I show the transistor numbers in another video in this series thank you for watching!

@cruzincondo3395 8 жыл бұрын

So, I take it that an ANL 200A fuse on the positive cable would've avoided such catastrophic failure?

@Bassguitarist1985 8 жыл бұрын

not necessarily.

@cruzincondo3395 8 жыл бұрын

OK, watched all 5 vids....overload heat/power surge blew the weakest link with domino effect. Samlex aren't cheap.....Exeltech are well made; brass posts, coated boards, direct connectors, yet hard to find......GREAT show! Thanks.