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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-22, 09:53

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I tested the diode bridge and I didn't find any short, I found only ohms values between the pins. I replaced the T3, BU903, and after poweron only with PSU the fuse didn't break down but without motherboard the FAN on PSU don't start and I can hear a small tic on PSU. Maybe is it trying a voltage …

Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-13, 19:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

With the tester I found continuity between "R" input and fuse. Tomorrow I think to have more time and I'm going to remove the ridge rectifier and retry and so on with other components

Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-13, 14:29

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you. It's a B380C2000/1500

Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-13, 12:15

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Forgive my ignorance, what is the bridge rectifier? ...next days I'm going to try to replace the two grey capacitors. I tried to verify with the tester a shorts between two fuse poles but seems to be detached. I can try to measuring a current but I'm worried there are to much amps and risk further …

Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-11, 11:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi guys...I replaced the 0.47 Uf caps and big orange 100uF. Every time that poweron the computer the fuse break down 😒 I don't know why...I didn't see any corrosion or strange caps

Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-05, 10:29

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ok thanks very much. I will try to replace the caps asap and I'll update 😘 P.S. I don't know what is it the white stuff

Olivetti PCS86 won't start - PSU?

Posted on 2019-03-05, 08:24

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Some days ago when I powered on the Olivetti PCS86 didn't work with strange screen below: https://i.imgur.com/E1TnZsk.jpg some days before worked!!! I tried to open the old computer but I didn't see any strange things. After several power on broke the fuse on power supply. Maybe a problem on some …

Sound Blaster Live one channel broken

Posted on 2019-02-21, 13:12

in Marvin \ Sound

in Marvin \ Sound

I bought 2 sound blaster live model SB0100. I tried with the same hardware and with Windows 98SE and one of this dosen't work a channel. I cannot hear I think on left. Maybe broken card? please, can I repair or find the damage? The capacitors seems to be ok....at least at first sight 😅

Re: Aztech SG BXII Sound Card strange model "SC100S"

Posted on 2019-01-02, 13:28

in Marvin \ Sound

in Marvin \ Sound

On the JP10/11/12 from leftmost I left only a Jumper on pin 3 and pin 9, so ::|:::::|:: and now I can boot from HD. Thanks guys.

Re: Aztech SG BXII Sound Card strange model "SC100S"

Posted on 2018-12-21, 16:45

in Marvin \ Sound

in Marvin \ Sound

I can't seem to find the jumper on motherboard. https://www.seasip.info/VintagePC/pcs86.html I tried all jumpers on MB, nothing.

Re: Aztech SG BXII Sound Card strange model "SC100S"

Posted on 2018-12-21, 12:41

in Marvin \ Sound

in Marvin \ Sound

I'm impressed !_! thank you very much. Only a small think...I removed and changed the JP14 but on software setup changed only the base address from 220 to 240. I didn't understand where I can find the gameport enable/disable jumper. Next days I'll try to disable DMA on CDROM and I'll retry with …

Re: Aztech SG BXII Sound Card strange model "SC100S"

Posted on 2018-12-21, 09:37

in Marvin \ Sound

in Marvin \ Sound

Read of the board: https://i.imgur.com/VRJvb9Y.jpg front: https://i.imgur.com/2GS9OJM.jpg Now I waited some minutes after bios post and with card inserted I can see a messages "no rom basic available - reset". https://i.imgur.com/THX9Ex3.jpg I'm sorry but I don't know what to do anymore. I think to …

Re: Aztech SG BXII Sound Card strange model "SC100S"

Posted on 2018-12-20, 10:34

in Marvin \ Sound

in Marvin \ Sound

thank you all. I tried to change the jumpers settings on JP10,JP11 and JP12 and seems to work only IRQ with JP12, last 3 pins from left. The others JP doesn't change neither DMA or joystick port. https://i.imgur.com/hiBem70.jpg https://i.imgur.com/6nfY4Vp.jpg I can change the address with JP14, from …

Aztech SG BXII Sound Card strange model "SC100S"

Posted on 2018-12-14, 09:17

in Marvin \ Sound

in Marvin \ Sound

I found this aztech sound card. It's seems to be a SG BXII becasue there is the chip "AZTSB0792-U07". On pentium motherboard I disabled all serial/parallel and with driver SG BXII works!!! Now I tried to install on 8086 motherboard but the computer after self test doesn't boot neither from floppy …

Re: My Epson EL2 286 w/Photos

Posted on 2018-12-10, 08:21

in Marvin \ System Specs

in Marvin \ System Specs

I'm sorry some photos is bad.

Re: ActionDesk 7000 - 486DX4 100MHz - hang

Posted on 2018-12-07, 14:50

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Resolved. There was a incorrect settings with the jumpers on motherboard for the CPU DX4.

Re: Roland SC-7 computer connection

Posted on 2018-12-07, 14:49

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK thanks

Re: My Epson EL2 286 w/Photos

Posted on 2018-12-07, 09:46

in Marvin \ System Specs

in Marvin \ System Specs

Hi, I have the same EPSON model but without memory simm. It's very hard but where i can find this kind of memory? 😊

Roland SC-7 computer connection

Posted on 2018-11-30, 11:20

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm sorry for stupid question. I bought a Roland SC-7 and I want to use with DOS old games. I saw the computer audio input in SC-7 but now need I a cable from gameport to Sc-7 for midi music? In the games setup what kind of configuration I need to choose?

Re: 8088 and ERROR on poweon

Posted on 2018-07-19, 06:48

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for the many answer. At this point I think the problem is the keyboard how explained from @PTherapist. I'll try to search a pure XT keyboard. thank you very much

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