did some IBM XT units use AC fans?

Posted on 2018-06-17, 00:06

by

by lowlytech

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have an earlish 5160 that the previous owner had replaced the fan. They spliced into the 5 volt line to power the fan (a 12VDC). I was going to try to clean this up while I am recapping it, so naturally I am looking where the fan originally plugged into the board I can only find a quick detach …

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Re: Help identifying some components in my 5154 Monitor.

Posted on 2018-06-14, 13:01

by

by lowlytech

in Marvin \ Video

in Marvin \ Video

Well I still have my 5154 halfway torn down, let me skim over the mainboard, crt neck board, and video board too and see if R37 is somewhere on one of those boards

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Re: Need advice on ibm ega 5154 crt, fuzzy washed out picture

Posted on 2018-06-14, 05:09

by

by lowlytech

in Marvin \ Video

in Marvin \ Video

Jo22, I did not replace any diodes, transistors, or resistors. Infact the boards looked pretty good considering their age and there were no "cooked" looking areas. Do you think a bad diode could cause the monitor to function with an excessive blur, but otherwise everything else seem to function ok? …

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Re: Need advice on ibm ega 5154 crt, fuzzy washed out picture

Posted on 2018-06-14, 01:56

by

by lowlytech

in Marvin \ Video

in Marvin \ Video

MMaximus, No I haven't ran anything but a standard DOS console. I will have to try to get some other video modes ran on this before too long.

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Re: Help identifying some components in my 5154 Monitor.

Posted on 2018-06-13, 23:56

by

by lowlytech

in Marvin \ Video

in Marvin \ Video

I can't find R37 either on my power supply. I took some close up shots of my power supply that has been recapped. Filename IMG_0420.JPG File size 397.99 KiB Views 2570 views Filename IMG_0416.JPG File size 332.53 KiB Views 2570 views Filename IMG_0417.JPG File size 341.39 KiB Views 2570 views …

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Re: Need advice on ibm ega 5154 crt, fuzzy washed out picture

Posted on 2018-06-13, 18:47

by

by lowlytech

in Marvin \ Video

in Marvin \ Video

I haven't tried anything but a DOS text mode on bootup. When I saw the text was horribly fuzzy that kind of stopped me in my tracks. I tried adjusting the pot on the power supply to end up with 12V on IC2 output, but with it cranked all the way over I am getting 11.9v which I assume is alright. …

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Re: Help identifying some components in my 5154 Monitor.

Posted on 2018-06-13, 01:38

by

by lowlytech

in Marvin \ Video

in Marvin \ Video

Hey fellow 5154 owner. I just got one myself this weekend and am having some focus/brightness issues. There are two of the X2 caps in the power supply that blow out smoke from what I have found online. They are just filter caps however. Do you still need any part values? I noticed keropi got you the …

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Need advice on ibm ega 5154 crt, fuzzy washed out picture

Posted on 2018-06-13, 01:13

by

by lowlytech

in Marvin \ Video

in Marvin \ Video

I got a 5154 that wouldn't turn on at all. Took it apart and litterally recapped every single cap on all boards. The power supply had never been opened and one cap failed open while another two had very puffy tops. The notorious x2 caps hadn't released their plume of smoke, but replaced them while …

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Re: XT build, need graphic/display advice

Posted on 2018-05-17, 14:32

by

by lowlytech

in Milliways

in Milliways

I like the idea of the Tandy, and honestly when talking to people around my area they were more popular than IBM XT systems as far as ownership. About 3 weeks ago I talked to a customer and they said they hauled their tandy 1000 to the dump 6 months earlier.

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Re: XT build, need graphic/display advice

Posted on 2018-05-17, 04:05

by

by lowlytech

in Milliways

in Milliways

Maybe I might ask this question a different way. I remember CGA to be awful... magenta, white, cyan, etc. Was a real CGA monitor and card different? Maybe I only experienced CGA on VGA systems and that is why I have such lackluster memories of it.

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Re: Need a NE2000 setup/config program

Posted on 2018-05-17, 03:26

by

by lowlytech

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Chinny, I know this is a super old post, but I have the exact same NIC as you in this post, and the links you gave to download the utility/driver is dead or I can't get it to work right. Do you still have those two files by chance? 2000-d1.zip and 2000-ut.zip? Thanks so much..

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Re: XT build, need graphic/display advice

Posted on 2018-05-16, 13:37

by

by lowlytech

in Milliways

in Milliways

Thanks for the replies. I should mention I have a late model 286/12 system with VGA onboard (WDC video). So you think I should concentrate on CGA for my XT when I get it or would it still be worth to use this CL-GD5320 8/16 bit VGA card I already have? I guess that is considering I can even find a …

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XT build, need graphic/display advice

Posted on 2018-05-16, 04:43

by

by lowlytech

in Milliways

in Milliways

I have finally gotten the itch to try to find an IBM XT 8088 or clone locally and have a question on the display. I know CGA and EGA were common for this, but I have an ISA video card that has a 8/16bit jumper that I would hope to use to connect a VGA monitor. Will this have any negative impact over …

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Re: slot 1 issues with lockups

Posted on 2018-05-09, 23:28

by

by lowlytech

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Golden advice. Thank you very much. I went ahead and cleaned both surfaces and I have not been able to make the machine lock up with minor bumping. Thanks..

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slot 1 issues with lockups

Posted on 2018-05-09, 03:46

by

by lowlytech

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a slot 1 board that seems to be very sensitive to any bumps or touching of the heatsink to get an idea of the temperature. if I barely touch the fins of the HS the machine will lock. if I bump the keyboard into the case, the system will lock up. Surely this isn't too normal, but I remember …

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Re: Terrible performance help, 486SX-33

Posted on 2018-04-08, 00:11

by

by lowlytech

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If I remember my PB 486 system back in the day controlled the turbo with a CTRL+ALT+ (plus) or CTRL+ALT+(minus)

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Labtec LCS1000 Speaker volume question

Posted on 2018-03-26, 12:45

by

by lowlytech

in Marvin \ Sound

in Marvin \ Sound

I have a LCS1000 here, and it works well enough for vintage purposes, but wanted to know if someone can confirm it's volume function. The unit has two inputs on the back, and they both work, however only one of the inputs can be adjusted with the volume control on the front. The other input works, …

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Re: EEPROM programmer questions, got a bad flash chip WinBond w29EE512-p

Posted on 2018-03-25, 13:05

by

by lowlytech

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Quick update. I found a source for atmel 64x8 chips that were on the supported chip list of flashrom. I was able to write this new chip and it is working great so far in my aztecmonster. Have had it on for about 6 hours and done about 2 dozen power cycles and it has worked every time. Thanks so much …

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Re: Having Trouble Removing Permanent Marker from Computer Case

Posted on 2018-03-18, 15:10

by

by lowlytech

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wow, it sounds like you have used everything I have in the past with magic eraser being the most successful. I have a few cases where the magic eraser started taking the top coat of paint off where you could see a sheen change. Might try goof off as a last resort, but that will probably try to take …

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Re: EEPROM programmer questions, got a bad flash chip WinBond w29EE512-p

Posted on 2018-03-18, 13:54

by

by lowlytech

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have an update. I opened up my older file server I used before switching to freenas last year as a last resort, and low and behold it had an intel nic with the PCLL32 socket. It also looks like my old server has a leaking CR2032 battery which is a first time I have ever seen that :neutral: I got …

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