Jump to content

All Activity

This stream auto-updates     

  1. Past hour
  2. Paralel

    Powerbook 540c and Apple 4x CD Rom drive

    Also, have you tried loading the appropriate driver software?
  3. LaPorta

    Can anyone check their IIfx for C27?

    Just throw in a 25 or 50 volt. It will likely last longer, to boot.
  4. Today
  5. CC_333

    PowerBook G4 No Sound

    Is the internal speaker plugged in properly? Depending on the model, there is a cable going to the logic board that can come loose. c
  6. Johnnya101

    Can anyone check their IIfx for C27?

    Oh, ok, see it now. It appears to be 47 uf as the other can on the board. Now I just need a voltage to go off of... It is probably 16, like the other, but im not taking any chances.
  7. My Mac Plus powered up on brightest settings and when I dimmed using the toggle it doesn't dim and it flickers. I think it needs a recap and I don't wish to recap the whole board. Anyone knows which caps do I change for the brightness control on the analog board?
  8. glay78

    TAM Not Booting Up

    Try this, disconnect the HDD ribbon and try booting up.
  9. Yesterday
  10. Johnnya101

    PowerBook G4 No Sound

    Hi yet again... Here's an interesting issue with my G4. No sound at all. No boot sound. Nothing. Reinstalled OS. No change. Nothing is muted. Sound is on... Internal speakers set as device in the sound panel. Microphone works. Aux out works. Just no sound from the speakers. I've reset pram and all that multiple times. Ideas?
  11. Johnnya101

    Powerbook G4 667 Airport?

    Ordered an original airport card for now to try. The school has a "public" network with no password, but it checks and verifies your WiFi address is whitelisted. I'll update once I try that.
  12. judd sandage

    Macintosh TV questions

    I have no idea if it supports CD-Rs, I have never used it, nor used any old drives like this in... well 20 years or so.
  13. Retro Rider

    Macintosh TV questions

    Thanks for the link! Also, can you please tell if the Mac TV supports CD-R? I'm about to get a caddy and haven't tried it before
  14. Neither did I, since I retrobrighted it before having a woking SE to test it on. But good news! I posted too soon. When I took it apart, I must not have connected the ribbon cables securely. I reseated them and now it's working great. I'm still going to be very wary of S-video cables...
  15. Yea, probably. You accidentally connected signal lines together that arnt designed to be connected in that manner. I am highly surprised you did not kill the ADB IC in the SE. But then there is also the factor of which I have no idea if the keyboard even worked prior, so theres that.
  16. Uh-oh... bad news. Got my ADB cable in, and the keyboard does not work. The mouse connected through the keyboard works fine, which tells me that my ADB cable is fine. Did I fry my keyboard?
  17. trag

    2 Odd Nubus Video Cards

    Under "BUG" it says "Sapporo Japan" at the top of the card. Looks like the card model was Mac-VC Rev. B as several of the PLDs are labeled "PAL - MacVC" The D => A converter for the display (RAMDAC) is the largish BT chip near the rear plate. The three BUG chips before that do something else. Perhaps sling the data out of memory to the RAMDAC at the appropriate time(s).
  18. techknight

    SE/30 PDS Adapter Epic Blunder

    LOL. Yep, I am pretty daft. Didn't pick up on it. Anyways regarding the topic, I have blown up so much electronics over the years its not even funny especially when I was younger. I never take it personal anymore otherwise it will eat you alive. Not to mention the time I tried to stick a Nubus ethernet card into an SE, Backwards. It fit, but did it work? um.... you dont want to know. ESD, reverse polarity, experimenting, you name it. I always just chalk it up "in the name of science" for me when I do it experimenting or attempting to repair something. My "E.B Club" is probably larger than the participating members in this thread combined. As for the card, its likely the IC is dead. As Bolle had mentioned the different voltages getting applied to logic lines, Easiest thing to do is grab a DMM and check those lines on the card between VCC and Ground, it likely shorted one of them out to one of the voltage rails. Either VCC or ground. Especially if you hold up one of the /SIZ lines, it'll fail to boot. The power supply has no PTCs in it, not these days. One of the voltages rails was grounded by the mistake, and it tripped the built-in overcurrent protection. Once the comparator latches the D-Flop, there is a capacitor that has to discharge before it clears the latched state, This is all built into the SMPS controller IC. As long as voltage is applied, the timing capacitor stays charged, and the D-Flop stays latched. So before the timing capacitor can discharge, the main input filter capacitor has to discharge, and since there is essentially no load, this can take a long long time. All it takes is a fraction of a microsecond to damage a semiconductor. MUCH shorter than the duration at which the protection will latch in, Trust me. That single pulse from the power supply that is outside the specs is enough to blow the junctions of logic gates. you drive a transistor above or below its maximum limits it will damage it. Most datasheets have an "Absolute Maximum Ratings" section you can take a peek at which shows the limits, as well as the duration of what can happen before a chip cannot tolerate it, Just to help gauge things into perspective.
  19. judd sandage

    Macintosh TV questions

    Retro Rider, not a problem, this is the link http://macintoshgarden.org/apps/apple-restoration-cd-system-software-series-september-1994 for the smaller board on the tuner card... they don't look bad but I see what looks like oil or something covering everything below it... so I think all the caps leaked. but it doesn't look like it leaked to the mainboard. and now that I am looking at the picture, it seems that just about everything on that mini board is corroded. also on the back side of the analog board, there is several spots where it looks like someone repaired it before... including one spot that's a bit "how you doin" as EEVBlog would say. and there is what would seem to be some kind of bodge on it, any ideas if that is stock or someones "fix"?
  20. joethezombie

    SE/30 PDS Adapter Epic Blunder

    it’s in the title... epic blunder.
  21. techknight

    SE/30 PDS Adapter Epic Blunder

    Actually, Yes I do. Google doesnt find anything?
  22. Dog Cow

    SE/30 PDS Adapter Epic Blunder

    You don't want to know.
  23. techknight

    SE/30 PDS Adapter Epic Blunder

    What is an E.B. club?
  24. techknight

    Death chime and Simasimac on Mac SE/30

    Its not going to be UE8, or any one of those ICs, I guarantee that. the "stripes" is the initial state of the VRAM at the time of powerup. Each brand of VRAM have their own initial states thats why different brand VRAM used in the various SE/30 boards power up differently when the video circuits are not initialized by ROM. The fact that you have those stripes and they are being displayed properly without being broken up, rules out 90% of the video circuit including UE8. However, that does NOT rule out the PAL ICs entirely, as one of them is responsible for generating the System RAM R/W timing. You need to start looking at address/data/chip select lines between the GLU/CPU and the VIA/SCC/SWIM, RAM Muxes, etc. The 74F258 muxes are known to fail on these boards, you could start there. Also a persons depiction of Fast and Slow chimes could be subjective, without a sound sample I cant tell if its truly slow or fast. Fast chimes could be caused by any one of the VIA's control lines to the CPU, or its interrupt and control lines back to the peripheral ICs. Either way, when I used to work on SE/30 boards, 100% of the death chimes were always caused by RAM access issues. RAM itself, the traces, or the ICs involved therein. But you experiences may be different. the system not being able to access the SCC, SWIM or SCSI would not cause death chimes, it never has for me. Even the ASC, but if it could not access the ASC, you would not get sound at all. The fact that the ROM is not initializing the video means its crapping out really early in the boot process, and thats 99% RAM with the SE/30. If anything, and I mean anything at all is holding up the bus, you would get nothing. no chimes, no nothing. The fact that you get Chimes, and especially if those chimes are clear, rules out the bus.
  25. Trash80toHP_Mini

    601 processor replacement experiments

    Curious, I'll have dive back into the PDF docs once again it seems. It's looking like my theoretical interstitial QFP to BGA adapter could be the way to go. The cache deprived 1400/117MHz processor card would be the best candidate as there would be no slow L2 cache complications. Only two tiny caps stand in a 23mm wide pathway between another two pairs of caps into the "cache overhang" space of the higher end processor cards with cache. A pair of holes in the adapter PCB takes care of that clearance problem with plenty of area left on the multiple layers for the lines required for support components/voltage doohickeys. The only complication would be that such an extension buries the QFP pads on that side of the adapter. Such may not be a problem as higher temperature hot air installation would be possible. There are ZERO active components on the processor card. Every component is a silk screen layer identified cap, resistor or resistor pack save a curious boxy two connection somethingorother. I'll need to buz the connections, WAG would be a voltage converter? This brings up a second approach that's nontrivial at best and outright insane at worst. The 117MHz card appears to be done in four layers and amounts to an interboard connectors to QFP adapter with a workable sprinkling of power leveling and termination(?) glue on board. Caffeine deprived morning musing today would be to design a new processor card for the BGA G4 of choice with cache on die instead of the interstitial adapter. As in the statement above, the cantilevered "cache extension" provides more than adequate PCB real estate for support components. If the high 32 bits of a 64bit CPU were terminated would that suffice to use such a beast on a 32bit bus? We're talking shades of the LC's lamed 32bit 68020 running on a 16bit bus. A two generation CPU upgrade with cache on die at a HIGH bus multiplier on the 1400's 32bit bus hardly qualifies as "laming." I hope this makes some kind of sense? *** I'm beginning to wonder if Wegener employed an interstitial BGA to BGA adapter for theig Pismo G4 upgrades? edit: designing a new processor card with CPU specific support components would almost have to be a more practical approach (and far more efficient) than an interstitial adapter board. BGA to board interconnects on either side has to be easier than the spaghetti mess of BGA to QFP pads on all four sides. I wonder if the interboard connectors are still available? Donor card harvest/reinstallation on the G4 adapter ought to be easy enough, no?
  26. Retro Rider

    Macintosh TV questions

    Can you send a link to download the restore for the Mac TV? I'm planning on restoring mine and I kinda need the cd. Ps. on the tuner card there's a small board on it, it's probably old and very corroded. Mine was so corroded when I picked it up to put it back in the machine a cap or two fell. Luckily, the cards pretty cheap on eBay. You should probably buy sockets (I think that's what they are called) so if you need to replace it again, it's just a matter of ordering a new one and putting it in.
  27. Breathing

    Death chime and Simasimac on Mac SE/30

    Thanks for the hints, I will have a look at reichelt.de. I also know conrad.de or the swiss version conrad.ch.
  28. Bolle

    Death chime and Simasimac on Mac SE/30

    This I usually get single chips from ebay. Not worth it to place a digikey order most of the time. Also if you are located in Switzerland you might want to check out reichelt.de. Usually cheaper if you order from them over here in Europe. They don't have all the stuff though sometimes.
  1. Load more activity
×