Electronics > Repair
What is this part and resistor value
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Peter Tryndoch:
What is this component that looks like a diode and is labeled "TRSB1" ?
My colour vision is not the best. Is the value of this shunt resistor 4R9?
Hopefully the image will get attached to this post Ok.
Altronics did not have a 4R9 so I went with a 5R6 5W

Some history - if you're interested:
This is the low voltage supply for an overly complicated clothes dryer.
The shunt resistor failed. I replaced it with the 5R6 and then the control chip let out the magic smoke.
I measured the DC resistance of the primary as 0R2.
I rewound the transformer and now the primary measures 15R. Much better.
Now waiting on delivery of replacement LNK364GN
fzabkar:
TRSB1 is a TVS diode (Transorb). The two numbers are wildly different parts, though. :-?

http://markingcodes.com/search/c/200a
http://markingcodes.com/search/c/26a

See the snubber components in this example:

https://www.eeweb.com/wp-content/uploads/articles-articles-flyback-transformer-design-1387179412.png
Peter Tryndoch:
Somehow I don't think the value of that shunt resistor is 4R9
Does anyone want to have a go at reading the colour code?
Just blew another shunt, chip and transformer primary.
Transformer rerewinding time - fun!
Luckily I bought 10 chips. Foresight?

What is my luck in getting a schematic?
Device: Electrolux clothes dryer EDP2074PDW
Circuit board 0194_0003 G

BTW Thank you  fzabkar for explaining TRSB1
PA0PBZ:
Unfortunately the service manual does not have schematics but it does have a better picture of the resistor:



I'd say it's 47 Ohms.

(At least when that's the resistor you are referring too)
Peter Tryndoch:
47R sounds better.
The board looks slightly different but the colours seem to match what I have found online.
I have attached some more pics of the resistor.
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