Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-23, 17:29

by

by mjnman

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

it's incredible...maybe a miracle. I unsoldered the new CMOS battery (Installed new one some months ago) and now it's started and boot os from hard disk!!! Thank you guys...I'm very happy now 😁 😁 😁 tomorrow I will try with 8 bit isa sound card, new os install a so on. Thanks everyone

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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-23, 17:06

by

by mjnman

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I apologize for the ignorance, I tried to connect the PSU at motherboard and powered on. With tester I found the correct values and the voltage is fixed ...below: 1° BROWN: From +5.04V 2° BROWN: From +5.04V 1° BLACK: Ground 2° BLACK: Ground RED: From +11.75V BLUE: From -11.74V WHITE: From -5.05V At …

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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-22, 20:33

by

by mjnman

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Before with tester I identified the ground on PSU output cable, the cable to connect at the motherboard. I connected only the hard disk drive and floppy drive and powered on the PSU. With tester I tried to check the output voltage ad I found strange values beacause the voltage is always very …

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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-22, 09:53

by

by mjnman

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 …

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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-13, 19:14

by

by mjnman

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

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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-13, 14:29

by

by mjnman

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you. It's a B380C2000/1500

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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-13, 12:15

by

by mjnman

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 …

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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-11, 11:26

by

by mjnman

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

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Re: Olivetti PCS86 won't start - PSU?

Posted on 2019-03-05, 10:29

by

by mjnman

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

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Olivetti PCS86 won't start - PSU?

Posted on 2019-03-05, 08:24

by

by mjnman

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 …

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Sound Blaster Live one channel broken

Posted on 2019-02-21, 13:12

by

by mjnman

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 😅

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

Posted on 2019-01-02, 13:28

by

by mjnman

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.

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

Posted on 2018-12-21, 16:45

by

by mjnman

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.

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

Posted on 2018-12-21, 12:41

by

by mjnman

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 …

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

Posted on 2018-12-21, 09:37

by

by mjnman

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 …

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

Posted on 2018-12-20, 10:34

by

by mjnman

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 …

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Aztech SG BXII Sound Card strange model "SC100S"

Posted on 2018-12-14, 09:17

by

by mjnman

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 …

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Re: My Epson EL2 286 w/Photos

Posted on 2018-12-10, 08:21

by

by mjnman

in Marvin \ System Specs

in Marvin \ System Specs

I'm sorry some photos is bad.

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Re: ActionDesk 7000 - 486DX4 100MHz - hang

Posted on 2018-12-07, 14:50

by

by mjnman

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.

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Re: Roland SC-7 computer connection

Posted on 2018-12-07, 14:49

by

by mjnman

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK thanks

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