Hello, I have received the PCPARTNER VIB838DS (35-8838-XX) motherboard with the D7 component removed.
https://theretroweb.com/motherboards/s/pcpart … 38ds-35-8838-xx
Component D6 has the reference NDP603AL
Can you help me by telling me what component I should use in D7?
Thank you very much and greetings
What is the output of the one remaining?
If it is 3.3V you could try a non dual voltage cpu to test the baord.
D6 being connected to the sop-8 chip, I think D7 provides 3.3V to I/O a nd Vcore to single voltage cpus.
https://www1.futureelectronics.com/doc/SEMTEC … SC1101CSTRT.pdf
Is D7 connected to 3.3 or +5V PSU?
PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K
I don't know how to do what you ask me, for now I would only like to put a component where D7 was.
Thank you very much.
Nexxen wrote on 2024-07-12, 09:51:What is the output of the one remaining? If it is 3.3V you could try a non dual voltage cpu to test the baord. […]
What is the output of the one remaining?
If it is 3.3V you could try a non dual voltage cpu to test the baord.D6 being connected to the sop-8 chip, I think D7 provides 3.3V to I/O a nd Vcore to single voltage cpus.
https://www1.futureelectronics.com/doc/SEMTEC … SC1101CSTRT.pdfIs D7 connected to 3.3 or +5V PSU?
jnemo2004 wrote on 2024-07-12, 09:35:Component D6 has the reference NDP603AL
Can you help me by telling me what component I should use in D7?
D7 is a double diode (most likely a fast schottky) in TO220 package, because that's what this circuit needs to work. Everything else (PWM controller, MOSFET, choke, capacitors) is there.
Well, the heatsink is also missing but that is obvious. Seeing how it's not very big or actively cooled I'd say a diode pulled from AT/ATX PSU would work here pretty well.
jnemo2004 wrote on 2024-07-12, 10:24:
Do you have a multimeter? A AT PSU?
Fire it up and measure V+.
I can't provide with a specific model, someone with one can give the exact name.
PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K
Nexxen wrote on 2024-07-12, 10:58:Do you have a multimeter? A AT PSU? Fire it up and measure V+. […]
jnemo2004 wrote on 2024-07-12, 10:24:Do you have a multimeter? A AT PSU?
Fire it up and measure V+.I can't provide with a specific model, someone with one can give the exact name.
Looks like a candidate to be the LX8383
PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K
Thank you very much for your information. Now, I have to look for the suggested components.
Regards
I have searched among the components I have from the disassembly of several boards and I found those two double diodes.
One is with diodes integrated on a chip and the other is with discrete diodes (FR302).
Can any of them be used to replace the D7?
Thank you.
The one on the right has a higher current rating (and is in the correct package), so I think it would be the better option.
Thank you very much.
Regards
lti wrote on 2024-07-14, 04:56:The one on the right has a higher current rating (and is in the correct package), so I think it would be the better option.
