Author Topic: Iso-Tech IPS2302A PSU schematic? (2x 30v 2A + 5v 3A)  (Read 2661 times)

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Offline m100

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Iso-Tech IPS2302A PSU schematic? (2x 30v 2A + 5v 3A)
« on: September 21, 2016, 06:58:55 pm »
Does anyone have a schematic for an Iso-Tech IPS2302A power supply?  Externally similar to quite a few other far east designs the main pcb does not seem to match any I've found on here or elsewhere.

Front Panel view & Main PCB (bad light and ancient phone so pretty low res)

« Last Edit: September 21, 2016, 07:00:53 pm by m100 »
 

Offline macboy

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Re: Iso-Tech IPS2302A PSU schematic? (2x 30v 2A + 5v 3A)
« Reply #1 on: September 24, 2016, 12:26:49 pm »
Try this one http://www.ko4bb.com/manuals/download.php?file=Tektronix/Tektronix_-_PS280_Power_Supply/Tek_PS280-283_Service_Manual_Schematics.pdf

It is for the Tektronix PS280/PS283. I have a few different manuals for this type of widely cloned/rebadged supply, and the Tek manual is in a different league from the others for obvious reasons. It seemed a pretty good match to my IPS2303D (digital display). It doesn't have the analog display part, but the power section is all there including master and slave sides as well as the 5 V section.

Note that the 5 V section has fold-back current limiting. So it will deliver its rated 3 A into a 1.66 Ohm load, but if you connect a 1 Ohm load, it will deliver less than 3 A, and even less still with a short circuit. Initially I thought my supply had a fault since it wasn't cranking 3 A into a short, but this is by design.
 

Offline JacquesBBB

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Re: Iso-Tech IPS2302A PSU schematic? (2x 30v 2A + 5v 3A)
« Reply #2 on: September 25, 2016, 09:54:58 am »
THis schematics is from  SL-1731SB or PS23023, a 2x 30V 3A PSU,

Which has larger transformers,  and two separate boards, but it is the same level of construction, and there is good chance
that the schematics are very close.

 


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