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Electronics => Repair => Topic started by: oulup on July 31, 2020, 01:39:47 pm

Title: goodwill gps 4303
Post by: oulup on July 31, 2020, 01:39:47 pm

Hi! I have here a broken goodwill gps 4303 power supply and I'd like to try and repair it. I still didn't try to turn it on. There was a message written on saying not to mount a fuse because it's broken, so I suspect some power device problems, it's quite probable they messed with the voltage change input switches. Anybody has got a schematic to share? thank you for the help.

Title: Re: goodwill gps 4303
Post by: cdev on July 31, 2020, 01:51:04 pm

Could you shoot a better picture of the front panel? It looks a lot like the digital version of the GWInstek bench PS that I have.  I want to see if it might be a clone of a power supply I may have a manual for.

It probably isnt, but you never know. These power supplies are often very similar.

Title: Re: goodwill gps 4303
Post by: oulup on July 31, 2020, 01:57:30 pm

here it is, the front plastic is missing, they threw it away, but you still can recognise the model i guess

Title: Re: goodwill gps 4303
Post by: cdev on July 31, 2020, 02:09:16 pm

It looks very similar, with some slight differences.

The manual I have thats similar is for a Tek badged PS with such similar layout that it may be useful, if not exactly the same.

See attached file, Tek_PS280-283_Service_Manual_Schematics.pdf

Title: Re: goodwill gps 4303
Post by: oulup on July 31, 2020, 02:11:57 pm

thanks: I'll read and compare