Apple 15" CRT monitor repair

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  • Опубликовано: 27 окт 2024

Комментарии • 104

  • @GadgetUK164
    @GadgetUK164 Год назад +5

    Great job! Despite the tube having that shadow mask issue it was great to see you repair the issues on the PCB and neck board!

    • @tony359
      @tony359  Год назад +3

      Thank you! Yes, disappointing a bit but I hope I can find ONE working tube from the pile of those monitors :) Thanks for watching!

  • @adriansdigitalbasement
    @adriansdigitalbasement Год назад +4

    Great fix! And yes, sad that the tube is junk. 100% that is a damaged shadow mask.

    • @tony359
      @tony359  Год назад

      Thanks Adrian! I guess I need to thank your many CRT repair videos if I decided to work on one myself! Sad indeed that I couldn’t get a fully working one. Thanks for watching!

  • @jeremiefaucher-goulet3365
    @jeremiefaucher-goulet3365 Год назад +12

    LG = Lucky-Goldstar
    So yeah, this is no coincidence ;)

    • @tony359
      @tony359  Год назад +1

      ahahah amazing! Thanks for that!

    • @ChrisThomas-lt8jd
      @ChrisThomas-lt8jd 5 месяцев назад

      @@tony359 LG was originally actually branded as Lucky Goldstar. I think its similar to Sony, which I beleived was meant to be Sunny and of course the infamous Donkey Kong, which was meant to be Monkey Kong. Literally lost in translation.
      By the 90s, Luck Goldstar probably felt their name was maybe a little twee, so retired the Lucky part, as I recall, using Goldstar for a while. But then reduced that down to LG...

  • @sobertillnoon
    @sobertillnoon Год назад +1

    I was pretty lukewarm on this video until Tony mimicked the degaussing noise. 11/10 video now.

    • @tony359
      @tony359  Год назад

      ahahah thank you! I thought about finding some actual sound online - then I thought "nah"! :D

  • @samuraidriver4x4
    @samuraidriver4x4 Год назад +2

    Going back to your native language when things go wrong is pretty normal😁
    The tube might have been the reason for the RMA in the first place and the other issues secondary but who knows.
    Thanks for another interesting and entertaining video.

    • @tony359
      @tony359  Год назад +1

      ahah - yes, that was an interesting moment LOL! I have a feeling those monitors were made of "bad parts" and returned to the factory for refurbishment. So LG would open up a monitor where nothing works, basically boxes full of broken parts. Who knows. I haven't collected the rest of the monitors yet - I want to play with something low voltage now LOL! Thanks for watching!

  • @Neodra
    @Neodra Год назад

    Fire makes the video exciting, I hate when I get fire but watching someone else get fire is fun. Anyway great job!

    • @tony359
      @tony359  Год назад +1

      I got Fire, Sparks and Smoke! LOL! Thanks for watching!

  • @martin_soerensen
    @martin_soerensen 2 месяца назад

    Great video - you show the process you go through while diagnosing it and the mistakes you make along the way.
    You keep saying that you don't know much about CRTs, but it looks like you're doing a good job diagnosing the faults anyway. So your knowledge may not be specific to CRTs but having a good general knowledge of electronics obviously goes a long way. 🙂
    I like when people show their mistakes as hopefully it will enable us viewers to learn from them (those of us who also work with CRTs on an amateur capacity). I know I have made my fair share of mistakes but in the end they are inevitable and that is how you build experience, and I feel that I also learn something from watching this. So keep up the good work and I hope you keep working on those CRTs - they are an endagered species. 🙂

    • @tony359
      @tony359  2 месяца назад

      Thank for your kind words - well I am still alive so that's a good starting point! I am working on a small CRT right now, watch this space. Actually, it's going to be on the second channel, @Tony359_2 - aka "Tony259"

  • @cocoe68
    @cocoe68 Год назад +1

    Be extremely careful with monitors high voltages but continue repairing monitors because it is different to usual computers. I support you and I am confident you will do all OK, go ahead!

    • @tony359
      @tony359  Год назад

      Oh, I know that very well but thanks! I was always standing well far away when powering up and being extra-careful with High Voltage stuff. Thanks for supporting me and for watching!

  • @ted-b
    @ted-b Год назад +1

    Great video Tony! Another rabbit hole and even some fireworks! Awesome!

    • @tony359
      @tony359  Год назад +1

      I like rabbit holes - I don't like fireworks :) Thanks!

  • @MsNIKITA
    @MsNIKITA Год назад

    Damn.. This monitor has many lives. Congrats on getting it working, you're braver than I am.

    • @tony359
      @tony359  Год назад +1

      Ahah thanks! Maybe I'm just more reckless :) Now I need to find another CRT!

  • @retroelectrofrance
    @retroelectrofrance Год назад

    Thank you Tony for this video the adventure of the crt .

    • @tony359
      @tony359  Год назад

      Oh that would be an amazing name for a series! "The amazing adventures of Tony359 and the CRT" :) Thanks for watching!

  • @danielyazbek9910
    @danielyazbek9910 Год назад +1

    Incredible work and diagnosis! Love those videos

  • @TheMiddleMan890
    @TheMiddleMan890 Год назад

    Just picked one of these up, works perfectly! The only problem, as you said, is that the monitor doesn't get very bright. Blacks are crushed pretty bad on mine, going to try and open it up and fiddle with the contrast knobs in the back. Wish me luck!

    • @tony359
      @tony359  Год назад

      Be extra careful :) One trick is to keep one of your hands in your back pocket at all times. And - disclaimer - you do that at your own risk :) The brightness control should be able to do the adjustment you need: display a black picture in a darkened room, now turn the brightness control to maximum: do you see the raster glowing? If so, the adjustment on the flyback transformer won't help you. If not, then set the brightness control to mid-position and adjust the screen adjustment. Again, please be extra careful and don't do that if you don't know what you're doing! :) Good luck!

  • @SanguineBrah
    @SanguineBrah Год назад

    A heroic effort, and such a shame that both tubes turned out bad.

    • @tony359
      @tony359  Год назад +1

      Indeed! Thanks for watching!

  • @jedivader20
    @jedivader20 Год назад

    Back in the late 90s, LG was regularly referred to by my colleagues as Lucky Goldstar.

  • @jameshearne891
    @jameshearne891 Год назад +1

    The line output transistor (and power supply transistors on older designs) are often driven by transformers which make it look like a base emitter short when you check the transistor in circuit.
    Also watch out as some line output transistors can have internal resistors base to emitter, and also diodes emitter to collector.
    These can also make for confusing readings.
    And some very similar part numbers , for example a BU208 doesn't have the internal diode but a BU208D does

    • @tony359
      @tony359  Год назад

      Very interesting! Thanks for that, I have lots to learn on CRTs!

  • @Epictronics1
    @Epictronics1 Год назад

    haha, love the Italian bleeping :D Great video as usual Tony :) I actually have two Apple IIc CRTs that needs attention too! Maybe it's time for some Apple IIc goodness

    • @tony359
      @tony359  Год назад +1

      It was both languages! :) More effective :)
      I have a //c and 2 monitors in the pipeline :) Thanks for watching!

    • @Epictronics1
      @Epictronics1 Год назад

      @@tony359 It had me laughing for a good minute at least lol. It felt very genuine. I guess it's part of the fun when we explore these things :) I think my IIc CRTs only need something as simple as a recap. Not sure how to make that into an interesting video

    • @tony359
      @tony359  Год назад

      @@Epictronics1 ahah amazing! It came from the heart as I was not too comfortable working with high voltages and things were not going well so it was a mixture of anger and frustration!! :) At least the //c monitors have (or should have) schematics?

  • @bongey1
    @bongey1 Год назад +1

    I'm just started to watch. So far is a great Video, and yes you're right Tony! LG is the fusion of two companies "Lucky" and "Goldstar" -> LG
    Let's see the rest :D

    • @tony359
      @tony359  Год назад

      It should be finished by now, unless I managed to make you sleep! :) How was it? This "Lucky Goldstar" thing is amazing!

    • @bongey1
      @bongey1 Год назад

      @@tony359 ah yeah Sorry, I went instantly to bed after I finished the video. It was great, the little fireworks was interesting, yeah you forgot to solder the jumper after you finished using it, it happened, lesson learned you payed the price, thankfully nothing too bad happened, and you'll be more careful next time. Once I did something similar, I bring a CRT monitor from a colder place to a warm room, forgot about the moisture. Big crackling, smoke, coil whine like sound. It was like this for 2-3 seconds. Thankfully I turned off in time. Fun fact the monitor Survived, without any problems.
      So anyway it was interesting to see a tube from technically the same brand, I wonder what the production date difference is in both of them. I need to cheat here: they fused in 1995 according to Wiki. Interesting the monitor manufactured in '96, and the tube doesn't get relabelled maybe some manufacturing rule. Oh well, keep up the good work sir, and try not to blow yourself up next time :)

    • @tony359
      @tony359  Год назад

      @@bongey1 I'll do my best to remain in one piece! :) I'm not surprised about the Goldstar label. I guess it takes a while to re-name everything when you merge two companies. I guess they prioritised the brands which could be seen (monitor case), they probably did not care about a sticker on the CRT itself and exhausted the stock first. Interesting about that monitor of yours, good it's working! Thanks for watching! :)

  • @tobias_off
    @tobias_off Год назад +2

    Another good video by you. I also like someone who constantly says, I have no idea and nevertheless is working on a CRT. 😄
    For the burned traces on the pcb, you must remove every black spot or you get immediately or sometime in the future so called carbon tracking, which in case can then destroy your board again. Even if this means you have to cut out a piece of the pcb. 😉

    • @tony359
      @tony359  Год назад +1

      You know, I watched a video after making mine which mentioned that burnt PCB can be conductive. I guess I'll have to scrape it away indeed. I've got some solder mask coming, I guess I could cover up the hole with that. Thanks for watching and for your nice words!

    • @jameshearne891
      @jameshearne891 Год назад

      @@tony359 Yes, you need to get rid of all the carbonised pcb.
      You can repair the hole with Epoxy Resin.
      I wonder if after you replaced the transistor the first time there was some conductivity across the burnt pcb affecting the 70 volts and when you replaced it the second time you cleaned out a bit more burnt pcb which removed the conductivity.

    • @tony359
      @tony359  Год назад

      @@jameshearne891 Been wondering the same indeed. In fairness I was "lucky" to burn that transistor or I would have never discovered that there was an issue with the line. I'll fix that patch before powering up next time - if and when I get a replacement CRT! Thank you!

  • @MVVblog
    @MVVblog Год назад +2

    34:48 il toscano che esce fuori 😁

    • @tony359
      @tony359  Год назад +1

      Il bello di parlare due lingue è che puoi usarle entrambe in questi momenti difficili 😂

  • @FireballXL55
    @FireballXL55 Год назад +4

    LG = Lucky Goldstar the FCC ID BEJ is for LG.
    I searched through my schematics and the closest I can find is the Studioworks LG56M Diodes and transformer numbers tally also the transistor Q953 which is a KTA1275

  • @yorgle11
    @yorgle11 Год назад +1

    I've never had any luck trying to read axial resistors. I'm not color blind but the colors are hard to distinguish. Even when I can clearly make them out, the system still doesn't work.
    I can enter the colors into a web site that promises to decode it for you, and I will still get a completely different result when I check it with my meter. I tested myself on this with several resistors that should have been healthy and working fine.
    Maybe color codes were the only way they could mark things in 1873, but surely they could print numbers on them now.

    • @tony359
      @tony359  Год назад

      Same here! I spend time decoding the codes, trying to figure the value out. Then I ask for some forum's help and it's always "oh no, that stripe is a custom one, ignore it" :D How am I supposed to know! :)
      Anyways, that's also part of the fun I guess! Thanks for watching!

  • @chepossofare
    @chepossofare Год назад

    Sentire improperi durante una riparazione di crt è uno spettacolo ahahahah

    • @tony359
      @tony359  Год назад

      Eh, quando ci vuole ci vuole 🙂

  • @Mattia2607
    @Mattia2607 Год назад

    Fantastico! Peccato per i CRT rotti che rendono i monitor spazzatura 🙁 aspetto di vedere i risultati con l' apple 2c!

    • @tony359
      @tony359  Год назад +1

      Davvero! Spero di trovarne uno sano nel mucchio. Per i //c invece ho grandi aspettative! :)

    • @Mattia2607
      @Mattia2607 Год назад

      @@tony359 bene! Io nel frattempo sto impazzendo con un monitor 9" comelit di videosorveglianza che ha l' immagine molto ristretta ho cambiato condesatori, qualche resistenza e rifatte le saldature ma ancora niente da fare domani provo cambiando un chip e un quarzo speriamo bene! 😮‍💨😵‍💫

  • @RaphaelBastosakaCoffnix
    @RaphaelBastosakaCoffnix Месяц назад

    yo! I’m having a strange issue with my 1998 iMac G3. It works without any problems initially, but when it’s left on for a long time, a weird bug occurs that’s difficult to pinpoint. After being on for an extended period, my iMac G3 simply goes into a black screen mode if there’s any change in video resolution. Additionally, when I turn it off and try to turn it back on, the power LED stays green, never turning off, and the machine doesn’t power back on. The same happens during a reboot; instead of the LED turning yellow and then green, it doesn’t return from the reboot. Even with the startup chime playing, the screen remains black. The only solution is to unplug it and plug it back in. After being unplugged for a while, it returns to normal, but the bug reappears if it’s left on for several hours, typically two or more. I’m not sure if this is an issue with the mainboard, power supply, or analog board. I’ve already recapped 100% of the capacitors, and while the bug used to be permanent, it’s now intermittent. At first, I thought the recap had solved the problem since I only used the iMac for a short time, but when I use it for longer periods, the bug always comes back. It only stabilizes if it’s unplugged for at least 10 hours. Any attempt to turn it back on after the bug appears is futile. Do you recommend checking any specific chip or shutdown signal? Thanks for the help. Oh, I forgot to mention, only the electrolytic capacitors were replaced during the recap.

    • @tony359
      @tony359  Месяц назад +1

      But this is a random Apple CRT monitor video, why mentioning the G3?

  • @mitchkramez
    @mitchkramez Год назад

    Hi Tony! Great work - what thermal camera are you using there and do you like it?

    • @tony359
      @tony359  Год назад +1

      Thank you! It’s a seek thermal compact but the pro version. It’s ok. The software could probably be better. Can be used with third party software on a PC. Its good good resolution but It’s not cheap though, there might be alternatives now from China.

  • @THEtechknight
    @THEtechknight Год назад

    Also, the power macintosh 5XXX machines should have the same CRT so if you have one of those machines all crumbled and falling apart, Swap the tube.

    • @tony359
      @tony359  Год назад

      I don't have any unfortunately but thanks!

  • @buriedbits6027
    @buriedbits6027 7 месяцев назад

    I believe the color impurity issue on the tube is a result of the degauss coil not doing its job.

    • @tony359
      @tony359  7 месяцев назад

      Unfortunately it looks like a shadow mask damage. At 40:58 you can see that even a magnet is not moving those blotches, confirming it's not a magnetic field on the picture tube. Thanks for watching!

  • @douro20
    @douro20 Год назад

    At least these don't have horribly brittle plastics. Apple at one point told all of their suppliers to use ABS-FR plastics which aged horribly. I just tore down a JVC-manufactured Apple Multiple Scan display for parts because I couldn't trust the thing to not fall apart on me.

    • @tony359
      @tony359  Год назад

      Interesting. What was the reason for that? Thanks for watching.

    • @douro20
      @douro20 Год назад

      @@tony359 They were looking for fire resistance above all else I believe. ABS-FR is usually a blend of ABS with PC or PVC. I believe they used the latter.

  • @bobbybiggs4348
    @bobbybiggs4348 4 месяца назад

    I thought LG stood for Lucky Goldstar? I might be wrong but I seem to remember seeing that somewhere

    • @tony359
      @tony359  4 месяца назад

      You are indeed correct! Such a quaint name :)

  • @maniatore2006
    @maniatore2006 9 месяцев назад

    Goldstar os the Older Name for the now known brand LG. They renamed it in the 90s
    And that are a typical Monitor from the late 90s they are bad Constructed. I had some of these, and the most have the same fault, Even the discoloration on the CTR in the Corners.
    In my case that was a bad shadow mask. Like this Monitor.
    I Gave up to repair them. But i never had Fire in my Monitors.. :D
    Thank you fot that Video.

    • @tony359
      @tony359  9 месяцев назад +1

      Very interesting about the discoloration in the corners, sounds like it might have been a manufacturing issue then.
      About the fire... well, it made things interesting (and scary!)
      Thanks for watching!

  • @TomStorey96
    @TomStorey96 Год назад

    I guess someone forgot to make R723 a "no populate" part when they changed D702 to a jumper. Lol

    • @tony359
      @tony359  Год назад +1

      apparently. The saddest little resistors on the planet: no purpose in life whatsoever - unless the jumper fails! :) LOL Thanks for watching!

    • @TomStorey96
      @TomStorey96 Год назад

      @@tony359 lost but not forgotten, thanks to you 😊

  • @christopherjackson2157
    @christopherjackson2157 Год назад

    Goldstar branded as LG at some point. I forget what prompted it.
    Does the extra band indicate tolerance?

    • @tony359
      @tony359  Год назад +1

      A user on Badcaps said it's something non-standard such as reliability or something else. The confusing thing is that you can also interpret that value assuming it's a 5-band resistor...

    • @christopherjackson2157
      @christopherjackson2157 Год назад

      @Mr Guru I think it was when they entered the flat panel tv market? Early 2000s ish?

    • @tony359
      @tony359  Год назад

      @Mr Guru I won't look at my LG TV the same way now! :D

    • @tony359
      @tony359  Год назад

      @Mr Guru Now that many viewers mentioned "Goldstar", I do remember the brand. As you say, it was a cheapo brand. A friend of mine explained me that major manufacturers have people and software trying to predict the failure of the product. They design them to just go over warranty time, then it's not their problem. You really don't want something to last 20 years, do you? :) It hurts when you see some boards with components running at 80C as you say - they won't last forever for sure and a small heatsink is all they need - Check out the ARCAM repair video I have on my channel if you're interested! ruclips.net/video/SrR5L15Rau0/видео.html

  • @martinnash007
    @martinnash007 Год назад

    I used to buy Goldstar components in the 90's and then they became known as LG.

  • @THEtechknight
    @THEtechknight Год назад

    LG = Lucky Goldstar

  • @KorAllRBare
    @KorAllRBare 7 месяцев назад

    Yup.. Goldstar IS LG & LG IS Goldstar, in the 90's they changed from Goldstar to LG
    and I believe that happened in 1995..

    • @tony359
      @tony359  7 месяцев назад +1

      Yes, "Lucky Goldstar" apparently :) Thanks for watching!

  • @buzzulinifrancesco
    @buzzulinifrancesco Год назад

    34:51 finalmente ho scoperto che sei italiano a quanto pare (forse)

    • @tony359
      @tony359  Год назад

      ruclips.net/video/tB0wqZT2KWk/видео.html ;)

  • @Stoney3K
    @Stoney3K 2 месяца назад

    Those blotches look like there are dents in the shadow mask. Given that it's a thin metal sheet with holes in it, it's very easy to damage or deform it.

    • @tony359
      @tony359  2 месяца назад

      Unfortunately, yes. I had to dispose of it...

  • @JonathanSwiftUK
    @JonathanSwiftUK Год назад

    Goldstar = LG. Goldstar went into administration, managed to survive, was then called Lucky Goldstar, later changed to LG.

  • @Synthematix
    @Synthematix 10 месяцев назад

    Its been dropped thats why the shadowmask is destroyed, also overvoltage can heat it up and cause it

    • @tony359
      @tony359  10 месяцев назад

      Yes, unfortunately. We had to dispose of this monitor unfortunately... Thanks for watching!

  • @masakikun
    @masakikun 4 месяца назад

    Gold star was the old name of LG

    • @tony359
      @tony359  4 месяца назад +1

      Lucky Goldstar indeed! :)

  • @rbcksqnen
    @rbcksqnen Год назад

    nothing exploded just a little fire

    • @tony359
      @tony359  Год назад

      Just enough for a couple of sausages 🙂

  • @marekh2233
    @marekh2233 Год назад

    Ok.

  • @adrian_sp6def
    @adrian_sp6def Год назад

    41:26 magnetic charges ? O.O

    • @tony359
      @tony359  Год назад

      My English 🙂 and that was scripted, no excuses! How would you say that more accurately?

    • @adrian_sp6def
      @adrian_sp6def Год назад

      @@tony359 Your english is pretty good! but maybe "magnetic fields" would be more acurate. Because of maxwells equations div B = 0 => no magnetic charges :) But at the end this does not change that this video is great and I am impress of Your work. Working with CRT high voltage requires some brave and knowledge. great job tony!

    • @tony359
      @tony359  Год назад

      @@adrian_sp6def THAT was the word I was looking for! Of course... My Physics teacher would be disappointed! I'm not being sarcastic, you are right and Physics was my favourite subject at school! Thanks for your kind words!

  • @snakezdewiggle6084
    @snakezdewiggle6084 Год назад

    They're Apple, toss 'em under a train !
    30 minutes reading will make you understand CRTs.

    • @tony359
      @tony359  Год назад +1

      I'm learning :) I'll get there eventually! Thanks for watching!

    • @snakezdewiggle6084
      @snakezdewiggle6084 Год назад

      @Tony359
      There some very good videos here on yt
      Cheerz.

  • @PiotrK2022
    @PiotrK2022 3 месяца назад

    @tony359 LG and Goldstar is the same comapany... They just got rebranded in 1996... 😲😂

    • @tony359
      @tony359  3 месяца назад

      they are indeed, Lucky Goldstar :)

  • @minutemanqvs
    @minutemanqvs Год назад

    LG = Lucky Goldstar

    • @tony359
      @tony359  Год назад

      Thanks! That was a very unlucky Goldstar then :)