C64 power supply issue. And don’t think this is only a problem with the C64.
- C64 power supply issue The video output is showing some faint "ripples" running vertically down the screen. reddit The design is based on the one developed by famed C64-tinkerer Ray Carlsen, what it does is monitor the 5v line coming from your power supply and when it starts outputting voltages above 5. POWER PACK: +5VDC at 1. r/Gloomhaven. Garak: I think the problem with the "black brick" power supplies is an exclusively American one; I have never seen a European C64 with that supply. Replacement power supply for Commodore 64 and VIC-20 Report an issue with this product. Or if you have your original supply, run a power saver device The original power supply of my C64 was broken. Overvoltage can happen with practically all makes and models of linear power supplies from the era, though C64 power supplies have a much higher failure rate than most other brands, even back in the 80’s. g. No problem. Read that a underpowered pi also provides weirdness in loading images. " I am testing the power supply by placing the multimeter probes directly on pins 6 and 7 while the power supply is plugged into a power strip. My concern is that the C64 I got has the original power supply. We are here to help. You see the problem is the original power supplies would fail high instead of low, meaning they'd start increasing the voltage they I picked up a bread bin C64 recently, and I'm building a new power supply for it. 5A, the 9V AC from the transformer is rectified by 1A diodes and thus these diodes are overloaded, often causing burn marks on the PCB and is a reason for failures. They'll supply safe power to your C64 and keep it from getting fried by old power supplies that have failed over the years. 4. Pre-owned · Commodore. Unconventional interior decorator. My oldest VIC-20 uses the "black brick" kind, however. Finally, a few pictures showing the damages that can occur during de-potting of the transformer. Logged Hoarder of 8-bit Commodore relics and 1960s Tektronix 500-series stuff. To do so, refer to the power supply connector pinout and use a tester. C64 power supplies are plentiful almost everywhere in the world. | Browse our daily deals for even more savings! Commodore 64 C64 Computer Power Supply OEM 251053-01 Parts/Not Working - S56 (5) C $14. The Ubisoft Community Subreddit. It was the only one I could find. 0A DC output with anti-ripple filter Transformer-generated 9V/1. The issue I noticed when I built mine: when turning on the C64, it would cause the 5V to spike So I picked up a clean C64 unit that was in someone's closet for years with little use but I don't want to power up given all the power supply horror stories. Bubba656 Posts: 17 Joined: Tue May 19, 2020 5:02 pm. C64 PSU Tester. 5-1. . I already C64 power supply which hasn't been used in years. our C64 / C128 power supplies resemble a modern power supply with a slick shape of Collection of links and articles about the famous PET, VIC, C64, C128, TED, Amiga and PC Commodore machines. 5Amps and 12v dc @ 2. And you don't have to build you own power supply or have to make anything for it to work just plugin and play. That is a big problem, because everyone who own a c64 but stored it for years have a high risk to ruin the c64 when trying if it still works. TI-99/4A. 3. 0" x 2. 7v-5. They are worth very little. So, the problem with Power Supply was in two things. Here are some answers. 30A to 0. As long as I get the right voltages when testing with the switch set to off position, would it be safe to turn the C64 on and do the further tests? This C64 isn’t producing any video output at all. The problem is I haven't been able to to test the 5V DC line, because my hands are so shaky. And the label on the actual brick has the DC marking. 1A AC output Over-voltage and over-current protection Fused on AC and DC side and fully isolated On/off AC switch on rear side Output voltages on universal DIN socket Output power cable included with DIN plugs High Well, I'm very happy to bring you a good news! After some months of research, documenting and askingThere is a strong chance that I found a way to build an affordable C64 Power Supply! I will call it PSU64 First Of All: Problems with failing PSU(s) are well known to the community, with all the possible consequences. For a C64 power supply, you could use such as a mean well RS-25-5 to supply the 5v dc and a transformer to supply the 9v ac. Both power supplies under review here can Find a working C128 supply and swap a C64 cable onto it. Keelog (in Europe) makes good replacements. The main issue with the old power supplies is the 5V regulator. 50 (£14. I recently lucked out and obtained a C128 power supply "pre-modded" with a C64 power connector. As common a failure as it is, the supply should be C64 Power Supply Problem. Because the C64 almost directly When dealing with Single board computers, I have found it best to splurge and get a good power supply. That voltage will never be high or low it's there or it isn't. nige the hippy Veteran Member. Power Tester for Commodore 64 and VC-20 ; Additional input for testing the FDD 1541-II/1571-II/1581 power supply ; Forces a constant current from the 5V DC and 9V AC power supply outputs. Power supply failures are among the most common problems among retro Commodore 64/128 systems. The power supply itself only has 4 pins, and it does not look like any were removed. Replacement power supply for Commodore 64 and VIC-20 The obvious choice to power our luggable c64 is an AT Power supply. Stabilized and filtered +5V/2. All you need to build a DIY C-64 power supply are the two cables you can make or salvage from an original power supply, a 9V transformer, a 5V switching power supply module, a case to put it in, and possibly some bits of The original 1541 has internal PSU. To test your Try another power supply as Commodore power supplies aren't (especially the black brick ones) known as being too reliable. Even if the power supply is measured before being used, it can still fail after it warms This is no problem, the power circuits in the C64 handle this properly. Diagnosing a PSU failure can prevent expensive repairs or even save your hardware from a total damage. Or if you like soldering and tinkering, get a 5V DC wall wart with about 2 amps (or more if you plan on putting lots of crap on the expansion bus), then carefully slice open the brick's power cable and disconnect the Commodore side and solder in The reason why the C64 power supply damages C64's when it fails is because of a voltage regulator that fails inside the brick. There are four pins/holes at these connectors, with four wires to the supply. On the subject of the tape drive, tapes were not a big thing here in the States, but I know a LOT of cool games came out in Europe on tape and I wanted to see what I was missing. I had been doing consumer electronics repair work since 1964. My home-made C64 Power This is on a PAL C64. The problem is if you have a heavy weight power supply its most likely a solid block of epoxy so you need a ice pick or chemicals to try to dissolve it. @rt. Manufacturer is not responsible for any consequences of unauthorised or arbitrary repairs, modifications or incorrect usage. There are tons of options for new modern power supplies, some of which are quite cheap. General tips. The Commodore 128 I bought a Commodore 64 on ebay and I've had it for a little while and love it! But I noticed that if I leave it running for two long it will freeze up and t The C64 power supply not only generates a lot of heat (it is very inefficient) and easily overheats itself, but also suffers from underdimensioned components: While the power supply is rated at 1. I power it using a 220V power supply without problems. Replacement power supply for Commodore 64 and VIC-20 New replacement power supplies: click here for photos of new custom-built replacements The C64 Computer "Saver", power adapters and A/V cables: click here for photos. This power supply is repairable/revisable. The Commodore power supply that shipped with the 1764 RAM Expansion Unit is great, I use it all the time. If you have a question, comment, problem, or just want to chat about Commodore, post it here for free. We suggest contacting the seller directly to respectfully share your concerns. My experience with the C64 power supplies is not perfect, but the only failure I ever had was one just stopped working. It should be possible to load the 5 Volt of the external power supply with at least 1. Can there be a petition to add a note or pin or something in r/c64 about the power supply problem . I lost my C64 to an unfortunate accident with the power supply as I didn’t now that they had a problem. I tend to use the CannaKit brand power supplies for my Pis and other devices. so we've got a pretty large number of them out there working with no problems. Bil Herd designed the power supply he wanted to design. Come here to chat, discuss games, media, problems This is a project I've been working on for the past few months: an efficient C64 power supply with an emphasis on PROTECTION. 0 out of 5 stars replace that old c64 power supply. Personally, I have been repairing commodores for years and haven't run across one yet. Top. In your case, likely the voltage regulator has failed and I think you should consider yourself lucky that it didn't kill your C64, which is what these power supplies often do. Repairing such a mess seemed Owners of a C64 using an original power supply should regularly (for example, once a year) check the 5V DC function of their power supplies, as they tend to produce higher voltages as they wear out. ZX Spectrum. So, I've just bought a C64 at a flea market and it was said to have a faulty datassette reader. inside computer and 5VDC that is rectified and regulated by circuit located inside power brick and is used directly to power most of C64 chips. In which the author discusses the very simple repair of his repairable power supply. Suitable for many available 3d-printed enclosures available on web. I read they are unreliable and dangerous with age For a C64 power supply you need 9VAC along with a 5VDC line. Have a look at our wiki: https://www. Commodore 64 Power Supply - C64 PSU, (UK A friend of a friend brought this C64 to me, they had pulled it out of the attic and were playing some games for an hour or so with no issues when they heard a buzz sound from the power supply and it shut off. cheshirenoir William Wobbler Posts: 123 Joined: Thu Sep 27, 2018 3:16 am The next project I have for a Commodore power supply is to build a combined C64 and 1541-II PSU in a single unit. Atari XL/XE. It will cut the 5v rail to the computer in case of an over voltage. Post by Bubba656 » Wed May 20, 2020 7:00 am. The Commodore 64 power connector pinout Find many great new & used options and get the best deals for C64 PSU - Commodore 64 Power Supply - Black, LED, Power Switch (US plug) at the best online prices at eBay! Free shipping for many products! Commodore 64 Power Supply - C64 PSU, (UK 230VAC plug), Black, LED, Power Switch. (After 35 years or so 🙂, I don't think anyone at Commodore would have dreamed that the Commodore 64 would still have such a large fan base nearly 40 years after its launch. When I looked up the A500 on forums I did see a couple of people mentioning issues with unstable voltage on the power supply. Commodore never changed the basic crappy design of the C64 PSU except for the switching version sold with the 1764 REU. Quality confirmed by thousands of C= users worldwide! This is very useful as it saves you using the power switch on the C64 which has been known to be a problem due to it breaking or failing over time. 50/Unit) Free postage. But, like you said, given their age I am rather hesitant. The C64 FDD dual power supply has a chassis design called Modern (as opposed to our C64 Classic series), and resembles a modern power supply with a slick shape of 125 mm x 59 mm x 42 mm (5. I'm trying to find a range of voltages that are safe, sort of like a GO/NO GO gauge for my supply. Any recommendations for an updated power supply? I've watched enough videos to know the original power supplies areto be avoided. C64 Saver Power Supply Protection Circuit, with Backlit Commodore Logo Case and Connectors New Commodore 64 power supply solution, looking almost the same as original part. If you suspect the switch, unplug the computer and rapidly wiggle the switch on/off multiple times. Unfortunately it was one of those power supplies where everything inside the case has been glued into one big block filling the entire case. For the Commodore side of the connector, you can make your own cable with a 7-pin DIN, or cut the end off an old failed power supply. High-quality Commodore 64 replacement power supply unit (PSU). An over-voltage protection circuit could save my whole computer, so I have been thinking about a design for this circuit that I could solder together (linked image). From what I have heard, these power old supplies commonly fail and output a high voltage. By 1985 just about any C= magazine would carry ads for replacement and / or repairable PSU. Or if you have your original supply, run a power saver device with it. The C64 PSU chassis are available in colors black and gray. Only now that I look up "c64 power supply" on eBay do I see that the power supply I have looks like a crusty bomb in comparison. So no more buzzing and pretty much zero chance of frying So this is embarassing- I'm working on restoring an old C64 (250425) and I was ready to face many issues- the power supply was dead, I got a new one- I have a spare PLA and a dead test since in general those are the issues I've faced before. For using this PSU, a suitable enclosure is required. It's a lot lighter and more compact than the original C64 power supplies. Suspecting a power supply issue, I re-measured the outputs and was alarmed to find that they had increased to 6. Another common power problem is a wonky power switch that doesn't Find a working C128 supply and swap a C64 cable onto it. 5 Ampere. Computer powered up fine. Post by eightbitswide » Mon Oct 30, 2017 12:54 pm. The 5V rail is dropping to 2. For even more reference, Google "Ray Carlsen Commodore" and read his posts on repairing a variety of C64 issues. They are known to take out 64's (and Vic-20's in your case). 2x-Commodore 128,Amiga 500,600 Square DIN 5-pin male power connector (QTY 2) Power supply failures are among the most common problems among retro Commodore 64/128 systems. Click & Collect. 5V with a load connected. Reviewed in the United States on March 14, 2022. But I am wondering if these are too good to be true. It is still recommended to use a saver device with the VIC-20CR with round din as the 5v in the PSU can fail and provide over voltage. The reason is they have to be completely galvanically separated as the AC 9V is later used to generate 12V DC inside the C64 (see my other article about the internal power supply). The indicator light started to fade in and out and the screen became a mass of gibberish letters. In figure_2 you can see one of these standard cords. They're in a nice little metal case that nearly matches the C64 Breadbin. They output 5VDC and 12VDC but the C64 requires 5VDC as well as 9VAC. I purchased a c64 and decided to try testing the power supply. Testing the connector pins and connecting the datassette unit to an external power supply I discovered that the pin c3 is supposedly not providing power to the motor. I read that a bad power supply ruins your c64. You have options here, either make your own from scratch, buy a new The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. 6") Round DIN7 plug for C64 and DIN4 plug for FDD If you can get in the power supply enough to change caps and resistors, you may be able to change the 7805. It must not be connected to 230V while 115V mains is selected. Please try again later. I looked it up and it seems some c64 power supplies were just like that. So a 128 power supply and the PSU that ships with the 1764 are unlikely to have this problem. Here’s the files for the Commodore 64 power supply I built in this video. The 5v current on my power supply dropped from ~1. This was designed by my long time supporter S. The 9 Volt alternating current (AC) is the reference frequency for the internal clock and - after being rectified - it is used to power the SID chip (9 or 12 Volts), partially also the old version (NMOS) of the VIC-II chip as well as the motor of the Datasette (6 Volts). I looked this up and it seems to be a common issue C64 Disk labels / Commodore 64 label; Commodore PET Tape WAV files; IBM XT en AT downloads; Apple Mac diskette formaten; Ward Shrake. This page describes how to fix your power supply. 6v. - The glass fuse (20mmx5mm) was oxidized - (250VAC 160mA) - The soldered yellow wire on DIN 7 Connectors from pin 7VAC was broken I try the Power Supply today, leave it to work one hour and after few measuring the both current it looks so and the PSU warmed up just a little bit, nothing serious. Moderator: Lemoners. Technics sl-1200mk2 runaway platter and voltage issues. One way to do this would be a “crowbar” circuit that blows a fuse in case of an over-voltage. Commodore Plus/4. It includes real 9VAC output provided Contribute to Statik8bit/C64-power-supply-Pi-case development by creating an account on GitHub. So the fault is in the c64. This is specifically why we have He starts with the power off and then turns it on and keeps on measuring voltages. If they fail, they go to zero volts instead of the chip killing higher voltage. Sales [edit | edit source] Repairing my repairable C64 power supply. 5A) so don't think it's that. The problem with the C64 power supplies wasn’t limited to the early ones. I've bought several from them. Somewhere between 10 and 20 million C64s are estimated to have been produced, and even if a huge number of power supplies (like 100,000) have failed, that is still a very small percentage of what was produced. 7A and 9VAC@1A. Cheap and good solution to produce new power supplies for C64. Being under powered can cause all sorts of weird and hard to troubleshoot problems. So I bought a C64 real cheap for about $10. Welcome to retro computers. If there was a note of something it may help new people like me to not blow up there machines Share You've all seen the inside of a Commodore C64 Power Supply - what a potted mess of uselessness! Let's take a look inside the C128 PS and see if its any more For those familiar with my Re-Brick C64 Power Supplies, these use the same internal design, but with all new parts. 26 posts Previous; 1; 2; SysopSID William Wobbler Posts: 57 So I noticed a slight issue with my power supply today. Just be sure to get a 5VDC and 9VAC power supply that you know are good quality to use along with it. They tended to fail in a bad way, turning from a regulator into a wire and sending much a higher DC voltage into your precious MOS chips. Hi Antonio, thanks for the comment. Regarding the hardware, I'm using a pi3 for mine and it displays temp on the LCD display in real-time with the option in pi1541. Black wires are ground ( 0V ) levels. yes get a 'proper' power supply. Power supply (PSU) issues. As I am new to this (the one I have is the first commodore I’ve had in my life), I don’t want to mess it up and buy one that won’t work correctly Our power supply tester series for Commodore C64, C128, Amiga 500/500+/600/1200, Atari XL/XE, Atari 520ST/260ST, and ZX Spectrum +2A/+2B/+3 was created specifically to address this issue. I am very green with electronics (still learning slowly after all these years) but I am guessing that perhaps these power supplies are built in such a way that they don't connect any lines unless connected into a c64 power socket? I got a commodore recently, but I’ve been warned that the power supply is likely to fail, and I was considering getting a newer, more reliable one to avoid damaging the computer. 4v and 14. Make sure the voltage stays within safe margin from this, and test this with a datasette (which draws additional power from the 9V) The original C64 power supplies can The Pictorial C64 Fault Guide General tips - Power supply (PSU) Another common power problem is a wonky power switch that doesn't make proper contact. BOSCH Inverters - The company is now doing these systems, due to supply chain issues with Seems the first logical thing to do is replace the power supply. You could just get one of those and use the original supply until it goes. 5v, significantly higher than the expected levels. 1V AC. You can find them on ebay. I replaced it and all was well. Voltage drops may give rise to stability issues while too much voltage will undoubtedly fry the delicate chips on the old C64 motherboards. I've basically ruled out scan converters, monitors, power strips, cables by moving the poor machines around to different displays What causes the 5v dc to grow is aging of the caps inside the power supply. Either shop for a modern replacement, or, get one of those over-voltage protectors. C64 Power Supply . What is the best way to test the power supply before I plug it in to the computer? I have a multi-meter. Report a problem with an order We take intellectual property concerns very seriously, but many of these problems can be resolved directly by the parties involved. Display issues . All the sources of information I've found have been very conflicting (been researching for a few days). After a couple of hours the computer started losing power. I'd only do this if you're really in a pinch and I wouldn't run it for long. The Commodore 64 Power Supply. Some SX-64 owners modify Commodore REUs to use an external power supply in order to get around the power supply issues. I don't believe the A500 supply has the same issue with a failing supply killing the machine, that was specific to the C64 (and corrected with the supply included with the 1750 REU and beyond). 6"). These supplies are powerful (~300W), relatively lightweight, and abundantly available on ebay and other online vendors. Inside the C64 these components are all on the same supply rail and are connected together by wires and PCB traces of largely negligible resistance. The rise time of any likely overvoltage is far slower than the propagation delay of that rise across these traces (the propagation delay through the traces will be in the order of tens of ns whilst the risetime of an Get the best deal for Commodore 64 Power Supply from the largest online selection at eBay. This item: C64 PSU Modern Black US - Replacement Commodore 64 Power Supply Stabilized and filtered +5V/2. There was a problem filtering reviews right now. C64 Power Supply, monitoring lower AC voltages Problem solved, it's cheap, efficient, and a lot less bulky than a PC power supply case. Joined Apr 7, 2006 Yes, C64 DIN power is identical to VIC-20, except for the power supplies are rated for higher ampere so it C64 and VIC-20 Power Supply (Modern Replacement) These power supplies are produced by Electroware. Joined Feb 1, 2010 Messages 5,365 Location Central Now the ultimate question is, where is that one idiot who kept giving me shit about recommending modern C64 power bricks, saying that they can't be trusted and not all original C64 bricks go bad. The The 128 power supply, like part# 390205-01, is safe to use. But later, it wouldn't work with my Plus/4. They are very reliable and, unlike the original Commodore 64 and VIC-20 power supplies, will not fail in a way that destroys The C64 PSU is a modern replacement power supply unit for Commodore C64 & VIC20 computers. Has protection solutions, so it will not blow up your C64. Our power supply tester series for Commodore C64, C128, Amiga 500/500+/600/1200, Atari XL/XE, Atari 520ST/260ST, and ZX Spectrum +2A/+2B/+3 was created specifically to address this issue. Forces a constant current from the power supply and measures voltage level and ripple. 5A, which is quite questionable. Power supply. Replacement power supply for Commodore 64 and VIC-20; Stabilized 5V/2. The latter is enevitable if an original C64 power supply unit (PSU) is being used. They sound similar to That's good! Provides stable filtered 5VDC (up to 4. 92A. Well, I'm back from the Real World (patent pending) again, with enough time for a quick update. lol [fig2: PC power supply connector] After soldering the three power wires (+5V, +12V, and gnd) to the 1541 PCB, we need to connect them to corresponding pins of PC power supply cords. Could be: something's dead inside the C64, the power supply's dead, TV is on wrong setting, or you used wrong video cable. I want to make sure I do this right so I do not cause further destruction to the machine. I have a box chock full of working original C64 power supplies, which is the main reason I wanted to build the SaV64. Commodore 64. But there is just one problem. I've just returned to the C64 after a 33 year hiatus. 5Amps and 9VAC at 1 Amp Can produce many problems like blank screen (red power LED on, dim or off), program lock-up, “garbage” screen, hum bars moving on screen, hum in audio , damaged RAM chips, intermittent operation after warmup, etc. Please don’t answer with “make your own alternative power supply”, I want to be able to open mine. Another alternative is you can get voltage protectors that protect your C64 when the supply dies. £14. The irony. Another one would be the so-called “C64 Saver” that can be reset after an over-voltage incident without replacing a fuse. Most of the c64 power saver designs cut power around 5. It also occurs to me that perhaps the C64 is having some sort of issue with the high frequency the converter uses, and I don't think Commodore ever changed that, so any C64 power supply should work. I have read the description, and it does say AC to DC. 8amps) and a High-quality Commodore 64 replacement power supply unit (PSU). 3" x 1. 1: You can not use the AC 9V to power any of the DC 5V circuit. I have seen people make power supplies from ATX PSUs but could not find many details on this, I could probably rig up something pretty C64 Datassette power issue . Aging power supplies can kill the system. Replacement power supply for Commodore 64 and VIC-20 The third solution is to add the missing over-voltage protection between the power supply and the C64. Keep in mind that it's rare to find an exact match and sometimes multiple different problems can cause a similar faulty screen. I'm having a very hard time finding the appropriate wire to use for a custom C64 power supply. The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. Much better to go with a solid rebuildable power supply, or better yet a new one from a reputable source. D. 80. In North America, as far as I know, we only got the epoxy-ed "brick" power supply, which is not repairable. Frequently bought together. Aftermarket Power Supplies. boulderdash Jumpman Posts: 3152 Joined: Thu May 14, 2009 6:00 pm and the power supply load testers are easy enough to build I tried another supply, same result on the c64, and same result on measuring the pinouts. You name it. For a C128DCR power supply I used mean well pd-65a (supplies both 5v dc @ 5. Notes. Get a modern power supply such as the Commodore 4 Ever Atom. It runs a thorough test, minimizing the risk of damage due to an ageing factory power supply. It only conveys +5V DC and 9V AC power, and does not guarantee sufficient current output of the attached power supply. C64 Power Supply Problem. And use the original power supplies for doorstops only. Schematic, BOM and gerber files are freely available at: supply a few years ago and been planning to make a switching. For help with C64 hardware, software etc. Replacement C64 Power Supply Suggestions? auction - and I'm close to securing an operating C64, plus a 1541 and a DataSet. 236" to fit snuggly in the DIN connectors I have. A C64 PSU failure can lead to expensive repairs, or even render the entire system useless. Could take years to die but it could die tomorrow you just don't know. One by Bwack, and one by Tebl. Sinclair QL. However, the minimum possible AC voltage on which the C64 will work correctly is about 8. Personally, I recommend replacing the power supply altogether. Does this design make The 1700 and 1750, 128K and 512K units intended for the C128, are said to work more reliably with the SX-64 than the 1764 unit that was intended for the regular C64. I need one that's about 6mm or 0. Opening up a few of those power supplies was big motivation for us to design our You know the c64 PSU is like a brick,I was thinking why they put epoxy in it,well if you had a Amiga psu and a c64 psu and drop them from a great height,the c64 psu would bounce and the amiga one would shatter like glass. The second one I bought worked with my C64, Plus/4 and C128. Amazon Customer. They unplugged and plugged it back in and just got a red light. As you mention, the 50/60 Hz could in theory make some difference, but I don't think it really matters in regular operations. Plus the block is already bulging on the bottom. Modern style chassis. I suggest you try eBay or your local thrift store. In fact Ray Carlsen has stated that the VIC draws more power on the 5v line then the 64 does so if the PSU is having any issues with power it may still work on a 64 but not on a VIC. 6v a relay is slammed shut and the line is cut. When it eventually fails (and it will!), from e. Not to mention the heat output tells me these things draw more power than a modern supply. The issue is when the C64 has warmed up a bit this happens to the screen: I'm worried it may be overvoltage and something else might be damaged as well Power supply failures are among the most common problems among retro Commodore 64/128 systems. The protector devices are not mere "surge suppressors"; they are adapters specifically designed for C64 power supplies to stop them from destroying a C64 once the power supply goes bad. eightbitswide Mikie Posts: 466 Joined: Sun Oct 02, 2016 3:01 pm Age: 53. Usually being potted, you cant replace that regulator. N. So I got my first commodore 64 today and it's got a black screen when I use the component cables but when I use the RF it gives me pulsing static. Use it as a tool to assist in diagnosing C64 issues, to get a general idea of what might be wrong with your machine. The testing of The main issue with the original C64 power supplies is the 5V line. Provides stable filtered 5VDC output now upgraded to 4. The problem is, it makes a spotty connection!!! It spikes the power on and off (can't be good) when I move the cord or the C64 a little. My first one worked with my C64 with no problems. Commodore 64 power supply unit (PSU) automated tester. 0A DC output with anti To add to the others suggestions as well, do check that your pi power supply is delivering enough amps to the pi. This is specifically why we have designed the C64 power supply tester. I'm also on his Patreon site so happy to add my experiences to yours Recently, I purchased a Commodore 64 with the original power supply. Buy commodore 64 power supply products and get the best deals at the lowest prices on eBay! Great Savings & Free Delivery / Collection on many items Commodore 64 (C64) or VIC 20 Power Supply (PSU) With A Sensory Issue. But what happens? Is the c64 beyond repair or is it fixable? Can it be the reason the vic and sid die? The old Commodore 64 power supplies are prone to failure with over-voltage on the 5V line that will destroy your computer. It's just some screwed together metal plates with rubber feet, and it ventilates via eight drilled-in holes in the front. Also, I should mention I'm using an official raspberry pi power supply (2. If you have an original OEM power supply, even one of the newer ones from 1988, you have a ticking time bomb on your hands. Follow the Commodore spec for your connections, using a multimeter for confirmation, as the wire colors may not always be correct. The computer was originally Replacement power supply for Commodore 64 and VIC-20 Stabilized 5V/2. The original C64 power supplies were specified at 5VDC@1. This issue however is new to me- I have no video signal at all. 5Amps and 9VAC at 1 Amp Can produce many problems like blank screen (red power LED on, dim or off), program lock-up, “garbage” screen, hum bars moving on These types of solutions work great if you want to forego a power saver. They produce very little heat, and are much smaller than the Recomm replacements that people seem to use as replacements. The power supply contains 1A diodes without any cooling, while it is rated for 1. 4v dc is safe, and 8-11v AC is idflyfish wrote:From Carlsen Electronics "A TESTER FOR THE C64 POWER SUPPLY ""Loss of the 9 volts AC will not damage the computer. Replacing them with modern equivalents can be done, but some skill is required and I'm not sure if there are easily obtainable kits for this. Wire for C64 Power Supply. My issue is that I have four C64s (2 x breadbin + 2 x C64C) which all display a kind of rolling interference when I power them using my newly acquired Keelog PSU. M. 0 out of 5 Power supply failures are among the most common problems among retro Commodore 64/128 systems. Rules #1 and #2 of vintage C64 is do not use that original power supply. Like the good 64 power supply, this one has the Commodore logo in the corner, rather than the center. The Commodore 128 power supplies are also really good if you have a 128; it's pretty easy to cut the end off it and attach a C64 power connector instead. Pay great attention not to short-circuit anything, as on later C64 power supplies the internal fuse cannot be replaced. As far as I see there’s nowhere I could put a The old C64 power supplies are known for causing problems with bunches (failure or slowly releasing more and more voltage are the most common problems). a shorted internal 5V regulator, it will put excessive voltage into the computer and damages delicate chips such as the RAM very quickly. so I would say. I would definitely go with at least the 2 amp supply. Some people are saying 4. ColecoVision. This second power line is actually critical, because any deviation from pretty narrow voltage range can either cause RetroPower PSU is a new power supply for your retro computer. AFAIK they were all sold with the wedge shaped power supply. As said by others, they're at less risk of gonking out, thogh they generate a lot of heat. This site is dedicated to users of 8 bit Commodore Computer hardware. Bad chips, and other problems, bad power supplies, keyboard issues, sometimes it's not too bad. A better DIY Power Supply - This one is much better done and still easily within the ability of Various homemade cartridges for instant loading games A single power supply for both pi1541 and c64 A joystick with at least 4 meters of cable, so you can play your games while on the couch against tv Yes, the power supply is an issue, don't use an original power supply. In a nutshell, the voltage regulator on the 5 volt DC output tends to fail in such a way that it lets a voltage spike go straight to your C64 motherboard, frying the precious chips. After my C64 has been on for several hours, I open it up and check them and they are barely warm. The results are displayed in real time on a digital OLED display. The main problem with the original C64 PSUs is that the whole thing was encased in a indestructible epoxy blob, which And don’t think this is only a problem with the C64. Just the perfect thing to preserve my 64!! It plugs into the C64, and it indeed works. The 1581 I think has full access to its components so these parts can be replaced. They ship DHL to the US. Then the transformer from the 13-83 power-supply, with the residual cool-grey epoxy I'm leaving between the windings and laminations, and the patch on the edges of the plates that I couldn't remove fully due to the lack of masking-tape protecting them. My Thanks. They kill C64's in many ways. I know it But, be careful of those standard epoxy C64 power supplies. Made on quality parts such as a factory AC/DC and transformer. When it fails one of the voltages, I forget which, jumps up to a C64 killing level. First, if it is the original black brick, I'd treat it Use it as a tool to assist in diagnosing C64 issues, to get a general idea of what might be wrong with your machine. Therefore, test the power before using it with your Commodore 64. Important Note: The most concerning issue is the Commodore 64 power supply. At worse it's an old power supply that someone slapped new stickers and a new mains lead onto and it will be just as dangerous as the one you have. The C64 power cable is connected to one molex Power supply (PSU) issues. 0A!). The original power supply of my good old C64 is not working anymore. Amiga 500. ) The stock power supply is known for going catastrophically bad and damaging the C64. Forces a constant current from the power supply and measures voltage Or if you're lucky use the power supply Commodore shipped with the 1764 REU, that's essentially a 128 power supply with a plug for the 64. c64 psu power power supply commodore commodore 64 commodore 64 power supply c64 power supply c128 commodore 128 ; Product details. Can I measure the voltage on the power supply pins with it plugged in and not connected to the computer? What pins do I The switching regulator in the 128 power supply is more complex and less likely to simply develop a dead short, like the C64 supply. I picked up a couple systems that are having problems and i want to see if the power supply is ok. But if you do intend on using one of these power supplies, people have developed hardware that go between the Commodore 64 and power supply and can protect the C64 from power supply failure. ca. Here is what I have come up with. The problem however is that I do not have a power supply for it and I heard that the stock ones are pretty crap. Regardless of the reasons as to why, almost 2 or 3 years after the release of the C64 the issues with the power supply were already well known. the power supply is good? Please check that the power supply has both 5V DC and 9V AC. Commodore 128. and all the files to make your own are provided publicly and free of charge: Documentation (pdf): C64 PSU Project Download. It is a c64 power supply, but the sloped type. Dual power supply supports both C64 and FDD 1541-II series Compact enclosure with modern shape 125 mm x 59 mm x 42 mm (5. I did that back in the days before other replacements were easy to obtain. This PSU is designed for a low price at a decent comfort and for providing a PSU that can be switched between 230V and 115V mains. Do a search for C64 power supply and you'll get some after market options. Welcome back to our Commodore Discussion forum. If you have a potted power C64 supply it's best not to use it at all (even it tests OK) until the joints have Yes -- in certain markets like the UK, Commodore sold a repairable C64 power supply, at least for early models. It's an online C64 repair bible. I personally run a C128 supply that has been modified with a second cord for a C64. This is specifically why we have I have my 2 power supplies that are connected to my Sav64 to a double plug so all I do to switch on my c64 is plug one plug in and it turns on my c64 (well have to switch it on at its switch after plugin it in) and my 1541 disk drive. A damaged power supply may give you a black screen on a perfectly The problem is that about 90% of the listings (including the one you linked to) don't say what the outer diameter of the wire is (including the jacket). Additional diagnostic and repair guides: Step-by-step Commodore 64 At best that is a quality refurbishment of an old power supply. upvote r/Gloomhaven. Everything is potted, so I can’t fix it. The power supply has a sturdy custom-made chassis with an OLED digital display monitoring the output voltage and uptime. In the Sav64 thread. The only problem is that like the C128 power supplies; these are also rare and expensive now a day. Gloomhaven, Jaws of the Lion, and Frosthaven are cooperative games of tactical combat, battling monsters and advancing a player's own individual goals in a persistent and changing world that is played over many game sessions. 5A, This guide lists pictures of various Commodore 64 problem scenarios along with their descriptions and known causes. I loaded a few old games without any problems. A good site for all things repair and diagnostics You can try re-seating the plug and wiggling the wire as well - often they can be the culprit instead of the supply itself. 0A DC along with 9V/1. The 1541-II uses an external PSU, which apparently can be as suspicious as the original C64 PSUs, and there are good The C64-Plus/4 power adapter is intended for use only with Commodore C64 and Plus/4 systems. 1A AC ensure continued error-free operation of your C64. (It's a smps and doesn't fail high) On the occasion that I do use a C64 supply, I have a couple C64 saver boards. RetroRecipes Cheap and Easy DIY C64 Power Supply - Please note that this is the cheapiest and cheasiest power supply method that I've ever seen. 0A by industrial grade AC/DC power module. 2: The DC-DC converters are definitely the way Review of modern power supply unit for Commodore 64 and 128 home computers. Commodore C64 "breadbox", C64C, C64D & VIC20 compatible. RAM, or maybe your 6502 processor are dead when over These power supplies either fail by a broken voltage regulator, or by a shortcut in a diode. Designed specifically for C64 and VIC-20 systems to preserve them in a pristine condition for years to come. If this makes a difference for the next boot, the switch is the most likely suspect. glitch Veteran Member. Opening up a few of those power supplies was big motivation for us to design our Commodore C64, C128, Amiga, Atari, ZX Spectrum, Sinclair QL, TI-99/4A, and ColecoVision power supply series. bur xtbhvr utpx pnydh yvprbx bxmmn zgkvvb btkpxar xgpa esdvi