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| GW Instek GPD-3303S channel 1 output voltage issues |
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| nikhilji:
Newbie here. Need some troubleshooting help. I have a GW Instek GPD-3303S that started giving me some trouble. when I press the output button for a preset voltage/current for channel 1, channel 1 goes to 0V, 0A. Any idea why this is happening? The other channel works just fine. I don't see the OV LED coming on either. I might be missing something very trivial, but appreciate any help with troubleshooting this. Thanks! |
| electr_peter:
What voltage and current setting is for channel 1? Does it go into CC (constant current) mode? If current is set to a low value, it is possible to have 0V 0A on display in CC mode. Also, try measuring both output voltage and current on channel 1 with external multimeter. What values do you get? |
| nikhilji:
Thank you for your response. Turned out the fuse for the channel 1 was blown. These fuses are the axial leaded types so I didn’t behave them in my parts bin. Waiting for the fuse to arrive in the mail. Hopefully nothing else is blown that caused the fuse to blow in the first place. |
| nikhilji:
Fuse F101 keeps blowing. I posted the schematic below. I checked c101 electrolytic cap - seems to show the correct value on my MM. What else should I be checking? Any troubleshooting help is appreciated. Thanks! |
| srb1954:
--- Quote from: nikhilji on September 13, 2022, 05:38:37 am ---Fuse F101 keeps blowing. I posted the schematic below. I checked c101 electrolytic cap - seems to show the correct value on my MM. What else should I be checking? Any troubleshooting help is appreciated. Thanks! --- End quote --- Have you checked that none of the diodes in the bridge rectifier are shorted? |
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