I am trying to fix a broken 13.8V 10A DC Regulated Power Supply.
It is a Spectrum PS4140M Model DF1763SCT.
The PCB is marked AQF7820.7409.
I cannot fine the schematic, after a lot of searching, so I thought I would
ask our resident gurus for help.
I have AC coming in to the transformer, being rectified and fed into the regulation circuit.
I have found what looks like a totally disintegrated diode - see the first picture below of
what was left on the PCB!
I am trying to identify this diode in order to replace it.
The 2nd pic shows the bottom of the PCB, showing where the diode fits, and where it connects to.
The 3rd picture shows the top of the PCB, where the broken diode was removed.
Nearby is another diode, all I can see is 1N5... so it is probably a 1N5401-5408.
Could the mystery diode be one of the same? I have new 1N5408 diodes.
If I fit one, what damage could it do?
All advice appreciated, and, if anyone actually has the schematic, that would be brilliant.
Thanks,
Johan
It is a Spectrum PS4140M Model DF1763SCT.
The PCB is marked AQF7820.7409.
I cannot fine the schematic, after a lot of searching, so I thought I would
ask our resident gurus for help.
I have AC coming in to the transformer, being rectified and fed into the regulation circuit.
I have found what looks like a totally disintegrated diode - see the first picture below of
what was left on the PCB!
I am trying to identify this diode in order to replace it.
The 2nd pic shows the bottom of the PCB, showing where the diode fits, and where it connects to.
The 3rd picture shows the top of the PCB, where the broken diode was removed.
Nearby is another diode, all I can see is 1N5... so it is probably a 1N5401-5408.
Could the mystery diode be one of the same? I have new 1N5408 diodes.
If I fit one, what damage could it do?
All advice appreciated, and, if anyone actually has the schematic, that would be brilliant.
Thanks,
Johan
