Need help with restoring FIC KC19+ \ VOGONS

Need help with restoring FIC KC19+

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First post, by Tomek TRV

Posted on 2024-04-25, 15:01

Tomek TRV Offline

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I am trying to repair FIC KC19+motherboards ( https://theretroweb.com/motherboards/s/fic-kc19-hp-oem ). Some stupid guy ripped out the transistors which are mounted between paralell port and slot 1 (these with radiators) and also smached some surface mounted elements. I have 3 of these boards so I found the parameters of surface mounted capacitors and resistors but I need informations about the type of transistors Q4 and Q5.
I have also FIC VB-609 ( https://theretroweb.com/motherboards/s/fic-vb-609-oem ) with FDP7030L and IRL3103 transistors. This part of motherboard where they are mounted looks similar to KC19+. If I will not get any informations which type of transistors were mounted on KC19+ I will use these from VB-609. I know that it is not a good idea but what else can I do?
Please help me to restore FIC KC19+ motherboards. They are interesting for me because they are using RAMBUS memory which is not so common on slot 1 motherboards.

Reply 1 of 6, by Tomek TRV

Posted on 2024-05-01, 06:03

Tomek TRV Offline

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Nobody knows? I tested KC19+ with my transistors and PIII Katmai and it seems to work fine. Now I have to try with two IRL3103.

Reply 2 of 6, by dominusprog

Posted on 2024-05-01, 06:26

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Take the transistors from FIC VB-609, it should be okay.

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Reply 3 of 6, by majestyk

Posted on 2024-05-01, 06:44

majestyk Offline

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There should be some printing on Q4 and Q5 of our spare KC19s.
Hint: Use a better magnigying glass 😉

Reply 4 of 6, by PcBytes

Posted on 2024-05-01, 11:02

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From the TRW photo, I can confirm that one of the transistors is a FDP7030L, so the parts are likely same as VB-601.

"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB

Reply 5 of 6, by Tomek TRV

Posted on 2024-05-01, 21:29

Tomek TRV Offline

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As I wrote in my second post that I used transistors from FIC VB-609 and KC19+ is working fine. Thank You for Your answers. It is a pity that they appeared when I lost all hope and tested this solution with transistors from other board but I really thank You for Your answers. Now I have to try with two IRL3103 because these transistors from VB-609 were just for test, I want to have all boards functional. FDP 7030L is impossible to buy in my country so maybe somebody knows what can I use instead.

Reply 6 of 6, by PcBytes

Posted on 2024-05-01, 22:18

PcBytes Offline

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I figure this should help you:

https://alltransistors.com/mosfet/crsearch.ph … s=TO220AB&cf=on

It usually shows you the equivalent transistors that you can use in place of a FDP7030L. Personal choices would be IRFP3713 and FDP6670AL.

"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB

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