TRS-80 PC-1 & Printer
I just picked up this system, and the screen is practically unusable. Does anyone know if there is a way to repair this kind of damage on the old LCD screens. It doesn't appear to be cracked at all. If it is unable to be repaired, would anyone know where I could get a replacement display (if possible at all) Also, the printer apparently runs off an internal (read as non-replaceable) ni-cad battery. I'm not sure if it needs replacing or not at this point, I'm going to try and let it charge for 15hrs (per the manual) and see if it functions at all then. Otherwise I will probably have to take it apart and try to get the battery stats and find/make a replacement. -- Normal Person: Hey, it seems that you know a lot. Geek: To be honest, it's due to all the surfing I do. Normal Person: So you go surfing? Normal Person: But I don't think that has anything to do with knowing a lot... Geek: I think that's wrong on a fundamental level. Normal Person: Huh? Huh? What?
*From the past...*[vcf-midatlantic] Repair TRS-80 pocket computer screen Click to teach Gmail this conversation is important. Inbox x VCF x Christopher Blackmon via vcf-midatlantic {no text body} Jun 2 {no text body} Jonathan Gevaryahu via vcf-midatlantic Bleeding 'ink', like a black ring which is converging toward the center of th... Jun 2 Bleeding 'ink', like a black ring which is converging toward the center of th... Jonathan Gevaryahu via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> Jun 2 to *Jonathan*, Christopher Bleeding 'ink', like a black ring which is converging toward the center of the lcd? or squiggly lines of black 'ink' coming from one edge? In either case that's irrepairable, you're going to need a replacement lcd for that. -- Jonathan Gevaryahu jgevaryahu@gmail.com jgevaryahu@hotmail.com Reply Reply to all Forward Corey Cohen via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> Jun 2 to *Corey*, Christopher
On Jun 2, 2016, at 1:05 PM, Christopher Blackmon <ckblackm@yahoo.com> wrote:
Does anyone know how to repair/replace the screen on a TRS-80 pocket computer? It looks like the edges of the screen are bleeding ink or something. Christopher.
Replacing is a pain because you need to find a replacement glass. There are some people who have split the screen, cleaned it and reassembled. Personally it seems a daunting task to me. I'd locate another unit and use your current one for parts. When you get the new unit, open it up and using aquarium silicon sealer to run a bead around the edge of the LCD display so that it stays sealed. The PC-1 has an early LCD screen and the seals can dry out and then start the LCD bleeding process. Sealing the LCD should prevent the issue. I have done this to my PC-1 and have no bleeding or issues. Cheers, Corey corey cohen uǝɥoɔ ʎǝɹoɔ Reply Reply to all Forward Evan Koblentz via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> Jun 2 to *Evan*
Does anyone know how to repair/replace the screen on a TRS-80 pocket
computer? It looks like the edges of the screen are bleeding ink or something. Christopher.
Replacing is a pain because you need to find a replacement glass. There are some people who have split the screen, cleaned it and reassembled. Personally it seems a daunting task to me.
I'd locate another unit
When seeking another PC-1, remember it's only a Sharp PC-1211 in TRS disguise. On Thu, Jul 28, 2016 at 3:34 PM, Evan Koblentz via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
I just picked up this system, and the screen is practically unusable. Does
anyone know if there is a way to repair this kind of damage on the old LCD screens.
I think we had a similar discussion here not long ago.
On Thu, Jul 28, 2016 at 3:34 PM, Evan Koblentz via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
I just picked up this system, and the screen is practically unusable. Does
anyone know if there is a way to repair this kind of damage on the old LCD screens.
I think we had a similar discussion here not long ago.
Joseph, I don't have any specific knowledge about LCD displays, but I think you'd have to be more specific as to the particular type of damage involved, probably including providing some pictures. I suspect that it might well be easier to replace the display, rather than to fix it, however. Check the display unit for any part numbers, as many are standard size and specification. As far as batteries go, replacing NiCd packs isn't particularly hard, as most are made of standard cells. Batteries Plus has been known to make up custom packs, at customer request, as well. - Alex
As far as batteries go, replacing NiCd packs isn't particularly hard, as most are made of standard cells. Batteries Plus has been known to make up custom packs, at customer request, as well.
That's where I went for the IBM Simon battery. They welded together a custom pack for me. It worked great.
I completely forgot that you can't send pictures to the listserv. Which I blatantly did. It is the bleeding ink problem. It's a TRS-80 PC-1, aka Sharp 1211. From the repair manual I found online, the part number of the display is LF8017JE, but a quick google search of that display brings up absolutely nothing. On Thursday, July 28, 2016, Evan Koblentz via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
As far as batteries go, replacing NiCd packs isn't particularly hard, as
most are made of standard cells. Batteries Plus has been known to make up custom packs, at customer request, as well.
That's where I went for the IBM Simon battery. They welded together a custom pack for me. It worked great.
-- Normal Person: Hey, it seems that you know a lot. Geek: To be honest, it's due to all the surfing I do. Normal Person: So you go surfing? Normal Person: But I don't think that has anything to do with knowing a lot... Geek: I think that's wrong on a fundamental level. Normal Person: Huh? Huh? What?
This is a normal problem for most PC-1. You will need a new LCD. The problem is the seal drying out around the LCD starts leaking and then it bleeds from the outside in. If you find a new LCD, then simply seal the edge of the screen with aquarium silicone so it never dries out. I did this for my PC-1 when I got it so it will be good for another 35 years or more. As for the battery, don't bother trying to charge it. It's bad at that age. Just desolder the old one go to batteries plus and have them make you a new battery pack with welded tabs. Be careful with the battery pack once you install it some lines are always live and if you short them like the ribbon cable to the printer mechanism they will melt. Ask me how I know.... If you get it all sorted I have every cassette radio shack made and can make you copies. The problem with the PC-1 is that it's very particular on which cassette recorders work and you can't use an iPod or a MacBook audio. Not enough gain. I guess you could attach a preamp. I went out and bought a new radio shack shoebox tape recorder on sale. Apparently they still have them. My Panasonic Rq-2102 that I used with my apple and sol-20 setups doesn't work with the PC-1, but does work with my PC-2. Good luck, Cheers, Corey corey cohen uǝɥoɔ ʎǝɹoɔ
On Jul 28, 2016, at 4:39 PM, Joseph Oprysko via vcf-midatlantic <vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
I completely forgot that you can't send pictures to the listserv. Which I blatantly did. It is the bleeding ink problem.
It's a TRS-80 PC-1, aka Sharp 1211. From the repair manual I found online, the part number of the display is LF8017JE, but a quick google search of that display brings up absolutely nothing.
On Thursday, July 28, 2016, Evan Koblentz via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
As far as batteries go, replacing NiCd packs isn't particularly hard, as
most are made of standard cells. Batteries Plus has been known to make up custom packs, at customer request, as well.
That's where I went for the IBM Simon battery. They welded together a custom pack for me. It worked great.
-- Normal Person: Hey, it seems that you know a lot. Geek: To be honest, it's due to all the surfing I do. Normal Person: So you go surfing? Normal Person: But I don't think that has anything to do with knowing a lot... Geek: I think that's wrong on a fundamental level. Normal Person: Huh? Huh? What?
On Thu, Jul 28, 2016 at 02:58:17PM -0400, Joseph Oprysko via vcf-midatlantic wrote:
Also, the printer apparently runs off an internal (read as non-replaceable) ni-cad battery. I'm not sure if it needs replacing or not at this point, I'm going to try and let it charge for 15hrs (per the manual) and see if it functions at all then. Otherwise I will probably have to take it apart and try to get the battery stats and find/make a replacement.
I would always recommend opening up and checking anything you know has a battery in it. They frequently leak which will damage whatever is nearby. Nicads leakage seems to be less volume than some other types. Powering it up with the leakage would likely make things worse.
participants (6)
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Corey Cohen -
David Gesswein -
Dean Notarnicola -
Evan Koblentz -
J. Alexander Jacocks -
Joseph Oprysko