C64 power supply issue. Here is what I have come up with.

C64 power supply issue 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. Our stylish C64 power supply should keep your Commodore64 running for another 40+ years. There are tons of options for new modern power supplies, some of which are quite cheap. 5A. Black wires are ground ( 0V ) levels. So that may be the core issue. 0A!) by industrial grade AC/DC power supply and full 9VAC (1,11A max) provided by classic heavy duty linear transformer unit. I have another power supply that's causing some pretty good interference on the computer it's used on. After watching Jan Beta's 25 Nov 2020 YouTube video on building a replacement C64 Power Supply, I thought that THIS was the next project for me. I'd expect the only issue to be the TOD clock running slightly slower or faster than normal. 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 The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. I have a C64 power supply which was made by a company in Poland. SO long story short and kind of cringeworthy I am sure, I had my Commodore 64 Breadbin Rev B repaired by ray carlson a couple of years ago and I purchased one of his home made power supply. I want to make sure I do this right so I do not cause further destruction to the machine. cade » Mon Nov 11, a real problem (I worked in repair in the early 90's) but it wasn't like every PSU failed this way. C64 Datassette power issue . That voltage will never be high or low it's there or it isn't. 1A AC The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. 0" x 2. Replacement power supply for Commodore 64 and VIC-20 Stabilized 5V/2. com forums; Forum64. Link to buy one enjoy. C64 power supplies are ancient, repositories, users, issues, pull requests Search Clear. Has protection solutions, so it will not blow up your C64. Include my email address so I can be contacted. This Saver is designed to The power supply has a sturdy custom-made chassis with an OLED digital display monitoring the output voltage and uptime. 230V AC I have a C64 power supply which was made by a company in Poland. 44W $$ Consequently, power dissipated in the regulator has fallen to: $$ P_{U1} = 125mA \times 3. For help with C64 hardware, software etc. I would personally have lik You can try re-seating the plug and wiggling the wire as well - often they can be the culprit instead of the supply itself. Find a working C128 supply and swap a C64 cable onto it. Looking for the perfect C64 PSU ? You have found it! Features: - OLED Display - Touch Sensor. WARNING C64 Brick of “Death” Power Supply. I've heard of people 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. 7v-5. I'm trying to find a range of voltages that are safe, sort of like a GO/NO GO gauge for my supply. But, I would not try this with the cart plugged into the C64. Replacement power supply for Commodore 64 and VIC-20 The plot thickens. They tended to fail in a bad way, 2. Except noise and interference from bad quality 5V PSU. 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? [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. They unplugged and The 5v current on my power supply dropped from ~1. They are notorious for being horrible chips and can cause the diagnostic cartridge to show strange results. Commodore International (CI), along The C64-Plus/4 power adapter is intended for use only with Commodore C64 and Plus/4 systems. A C128 power supply is a great option. In which the author discusses the very simple repair of his repairable 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. 44W $$ That's a much more reasonable power for the regulator to Switching vs linear power supplies for the C-64. 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. Plan and track work Code Review. To do so, refer to the power supply connector pinout and use a tester. The C64 and C128 power supplies are available in two shapes. Jeffrey. UPDATE, 6 Mar 2021: I've solved this problem. com FREE DELIVERY possible on eligible purchases. I didn't really see any solid solutions though. Any comments on typical issues would be great. Designed specifically for C64 and VIC-20 systems to preserve them in a pristine condition for years to So completely external to the existing supply. The problem is with the Commodore 64 itself. When it eventually fails (and it will!), from e. Are there any issues with the C128 Power supplies or maybe it is about time to start looking for an "Aftermarket" Power supply? If I am not mistaken the C128 Power supply can provide more current that the stock C64 PS Hi Antonio, thanks for the comment. Our power supply tester series for Commodore C64, C128, Amiga 500/500+/600/1200, Atari XL/XE, and ZX Spectrum +2A/+2B/+3 was created specifically to address this issue. bwack Source and The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. Provides stable filtered 5VDC (up to 4. This was designed by my long time supporter S. When I switched to better one picture cleared. Maybe a new power supply is in order. The video output is showing some faint "ripples" running vertically down the screen. but i think this is a bit overblown. Hello all, I was going through my old C64 stuff at my parent's house and I stumbled across my C64's original power supply and then the new one we had to buy. 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. 6"). Modern style chassis. and all the files to make your own are provided publicly and free of charge: Documentation (pdf): High-quality Commodore 64 replacement power supply unit (PSU). Have a look at our wiki: https://www. A reliable new Commodore 64 power supply has arrived. I already C64 power supply which hasn't been used in years. eightbitswide Mikie Posts: 470 Joined: Sun Oct 02, 2016 3:01 pm Age: 53. The power supply contains 1A diodes without any cooling, while it is rated for 1. Report an issue with this product. Replacement power supply for Commodore 64 and VIC-20; Stabilized 5V/2. 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. Converts power plug pinout from C128 to C64 ; Conveys 9V AC and +5V DC ; Round DIN7 plug (male) and square DIN5 plug (female) For use exclusively with Commodore 64 and 128 RetroPower PSU C64 OLED Digital International - Replacement Commodore 64 Power Supply. However they may be just as rare as the VIC-20 one. Check voltages, voltages were way too high on mine which caused issues with my c64. 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 With all the threads alately about replacing the ticking time bomb which is the C64 PSU I got on to thinking about the one for the 1541 The 1541-II power supplies are prone to failure, but unlikely to do any damage to the To my surprise the ICs were rugged enough to survive but surely the issue reduced their lifespan Good C64 OEM power supplies are getting more and more rare as they age, as we all know. It was enough of an issue that we would ask the customers to bring in their PSU to test, Im still using the old brick of death power supply , About this item . I think my problem comes from either dodgy power socket on 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. To test your 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. reddit C64 power supplies are ancient, they go bad every day so use protection! - Issues · tebl/C64-Power-Saver I picked up a bread bin C64 recently, and I'm building a new power supply for it. 4 lb) Custom designed high quality enclosure 158 mm x 71 mm x 51 mm (6. 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). You will be able to unplug and use the "Jackulator" as I am calling it with any C64 power supply. One of the ways the Commodore "brick" power supply can fail is from a shorted internal 5 volt regulator. The 1581 I think has full access to its components so these parts can be replaced. Here are some answers. Cheap and good solution to produce new power supplies for C64. This page describes how to fix your power supply. Some people are saying 4. Follow the Commodore spec for your connections, using a multimeter for confirmation, as the wire colors may not always be correct. The stock power supply is known for going catastrophically bad and damaging the C64. There are four pins/holes at these connectors, with four wires to the supply. UPDATE: The have been some reports of issues using the Keelog PSU. My intention (as always) was to use my modern replacement and test the original one properly later, but it only took a tiny slip and I popped in the original PSU connector and (as expected) The reason why the C64 power supply damages C64's when it fails is because of a voltage regulator that fails inside the brick. Most of the c64 power saver designs cut power around 5. M. If You get 4. The reason? I accidentally plugged in the wrong power supply. 92A. The front of the device holds a red ON/OFF switch. 0 out of 5 stars Caution - Potential Overvoltage Issue with C64 PSU Modern Black US. 96 V DC (which is good), but instead of 9V 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. There were 110v and 220v power supplies for the C64 and the power supply drops the voltages and type down to the voltages needed for the C64. An alternative to protecting your Commodore 64 from power surge when using an original power supply - costs less than a modern power supply. 95 to 5. Dual power supply supports both C64 and FDD 1541-II series. 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 I tried another supply, same result on the c64, and same result on measuring the pinouts. 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. Some recommend dropping them altogether and using newer replacements instead. It should be possible to load the 5 Volt of the external power supply with at least 1. And use the original power supplies for doorstops only. 0") Round DIN7 plug for C64 and DIN4 plug for FDD. I'd guess an issue with the RF module. 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. spannernick Zorro Posts: 1146 Joined: Thu Mar 29, 2012 2:53 pm Location: London,UK Age: 53. The main issue with the old power supplies is the 5V regulator. I had been doing consumer electronics repair work since 1964. I personally use a 128 power supply on my C64 computers and I have no issues with the 1541 UII. I looked this up and it seems to be a common issue with homemade power supplies. I did make a couple mistake, one no spot for a parallel resistor as C64 Power Supply . 6v. I added 3 overvoltage protections based on MC3423: 1) 5. Buy C64 PSU Modern Gray US - Replacement Commodore 64 Power Supply, US Plug: Internal Power Supplies - Amazon. I was pleasantly surprised to find that the power supply checks out as functioning perfectly on both the 5V DC and 9V AC connections, but unfortunately it gives me a black screen most of the time when turned on, and occasionally a garbage screen. The 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. Moderator: Lemoners. It's a lot lighter and more compact than the original C64 power supplies. I just vaguely recall issues back then with some hacked/modified 1541 drives. 2 people found this helpful. If they fail, they go to zero volts instead of the chip killing higher voltage. SMPSU noise isn't the major issue, its the leakage current through the class Y capacitor that is commonly fitted from 0V on the secondary side side of the SMPSU to the negative of its primary side DC bus. Repairing such a mess seemed Find a working C128 supply and swap a C64 cable onto it. POWER PACK: +5VDC at 1. In this video, I do a teard Definitely something on the c64 side then. It's an online C64 repair bible. Another one would be the After-market power supplies, even switching types, can fail at any time. RAM, or maybe your 6502 processor are dead when over The old Commodore 64 power supplies are prone to failure with over-voltage on the 5V line that will destroy your computer. A common reply to anyone posting here about finding a C64 is: Ditch the power supply! Don't use the original power supply! However, the only part of the original power supply to fail is the 5V DC circuit. Runs cold. The power supply that came with the 1764 REU (RAM Expansion Unit) for the C64 is identical to the PSU that shipped with the C128. g. It only conveys +5V DC and 9V AC power, and does not guarantee sufficient current output of the attached power supply. 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. 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 The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. I posted about the issue's it is having over on the AtariAge forum. Usually being potted, you cant replace that regulator. Notes. Having said that, it is probably one of the most overthought, overengineered components as well. Communities where you can ask for help with your C64 issues: Lemon64 forums; Comp. I've basically ruled out scan converters, monitors, power strips, cables by moving the poor machines around to different displays while at the same time building 4(!!!) s-video cables and also buying 2 High-quality Commodore 64 replacement power supply unit (PSU) with an additional power output for an FDD 1541-II/1571-II/1581. Power supply delivers current well slighlty higher than 2 A from 5V line. Save those precious C64 chips from certain doom! edit: sounds like your black-screen is due, so far, to incorrect video hookup, as diagnosed elsewhere in the comments. My current best approach to suggest is to use the Electroware C64 PSU(s). 96 V DC (which is good), but instead of 9V High-quality Commodore 64 replacement power supply unit (PSU). C64 and VIC-20 Power Supply (Modern Replacement) These power supplies are produced by Electroware. I sure hope that The power supply is one of the most integral part of any electronic circuit. Click & Collect. Top. One way to do this would be a “crowbar” circuit that blows a fuse in case of an over-voltage. Our C64 PSU is modern, replacement power supply unit for Commodore C64 and VIC20. A failing PSU is one of the reasons why the computer won’t turn on. This issue however is new to me- I have no video signal at all. So the fault is in the c64. This item: C64 PSU Modern Black US - Replacement Commodore 64 Power Supply Stabilized and filtered +5V/2. Pre-owned · Commodore. 5A, which is quite questionable. At best that is a quality refurbishment of an old power supply. New Model Choice of UK, Europe & So, the other day whilst (admittedly) working in a messy environment, I managed to fry some RAM chips in my C64. 8" x 2. They are very reliable and, unlike the original Commodore 64 and VIC-20 power supplies, will not fail in a way that destroys your computer! We highly recommend using these with vintage Commodore 64 and VIC-20 (with the r 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. 0A DC along with 9V/1. 5VA and not 7. 30A to 0. Read more. The C64 PSU chassis are available in colors black and gray. 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). or if it was a country of manufacture related Found your power supply it was designed by William Levak at Commodore for the Commodore 64, the part number for the power supply is 902503-02. This time however it's not a ground loop issue. 14 volts DC constantly. Suitable for many available 3d-printed enclosures available on web. It will cut the 5v rail to the computer in case of an over voltage. Helpful. Opening up a few of those power supplies was big motivation for us to design our The epoxy resin was only good at giving heat issues and making the components die sooner. Stabilized and filtered +5V/2. My rule of thumb is if it originally used a linear supply, stay with a linear supply. That fault puts excessive voltage into the computer and damages chips such as RAM very quickly and silently. Or if you have your original supply, run a power saver device with it. But I am wondering if these are too good to be true. You have options here, either make your own from scratch, buy a new modern replacement, or use the old one by swapping in a That's why I tried with my makeshift power supply and it booted fine. 2" x 2. 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. It is all integrated into small enclosure and dimensions similar to the original Commodore PSU. The cable by itself isn't known to have problem, only those that are inside the brick. It will not increase the amps you can get out of the original power supply so hardware hackers loading down their C64 with many accessories will probably need a new power supply with a higher spec. After my C64 has been on for several hours, I open it up and check them and they are barely warm. It simply replaces the original (and unreliable!!) Commodore power supplies. I have a voltage monitor on my C64, and this power supply hums along at 5. 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. 5V = 0. For more current DC-DC converter should be changed or heatsinked. 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 Our power supply tester series for Commodore C64, C128, Amiga 500/500+/600/1200, Atari XL/XE, and ZX Spectrum +2A/+2B/+3 was created specifically to address this issue. In figure_2 you can see one of these standard cords. 7v Your PSU is suspect, if 5v Your c64 is somewhere pulling down the +5v. de (German) Informative C64 repair videos: Jan Beta; Adrian's Digital Basement; GadgetUK164; KOJRO Retro Innovations; If you found this site useful, you can show your support here. They supply a more correct AC voltage It should be noted though that there are some concerns in the community about there potentially being ripple on the supply due to the to separate supplies not having a fused ground inside the supplies themselves (like you would get from having a single transformer design), but the grounds are fused within the c64 motherboard's power supply circuitry and the C64 Over-Voltage Protection Recently, I purchased a Commodore 64 with the original power supply. I’ve seen some debate about using switching power supplies vs using traditional linear power supplies. Does anyone by chance know if a flashing light on a Commodore 128 is a symptom of a bad power supply, or other power issue? The VIC-20, C64, Commodore 1902 monitor, Commodore 1571 floppy drive, Commodore CN2 Cassette, and the Apple IIc with monitor I acquired in the bundle all work fine. " 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. Personally, I have been repairing commodores for years and haven't run across one yet. Try leaving your C64 power switch on, and only switch it on and off using a power strip. A c64 A new power supply A pi1541 But I have these, Yes, the power supply is an issue, don't use an original power supply. Because the C64 almost directly I pulled my favorite C64 out of its dusty box and I have read of issues with the factory power supplies going bad in their age and in so doing upping the DC 5v output line to A workaround is to insert a reliable 5V DC supply to the power cord, whilst retaining the 9V AC supply from the original power pack. Reviewed in the United States on January 11, 2024. My concern is that the C64 I got has the original power supply. 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. Buy commodore 64 power supply products and get the best deals at the lowest prices on eBay! Commodore 64 (C64) or VIC 20 Power Supply (PSU) With A Sensory Issue. Based on this well known guy's design Had a lot of power supplies and C64 to test and I wanted something in there to protect the 64 from flaky power supplies. Got a new power supply for it. I have these two wall warts: The SaV64 is designed to be used with the original C64 power supply. Curious - if it's so easy to build a proper C64 power supply, then why on Lemon64 and other dedicated forums are there literally dozens of threads with people looking for a good, pcwzrd13 wrote:So I noticed a slight issue with my power supply today. This power supply is repairable/revisable. With a multi-meter and this set up you can get an idea if the voltage output is 'OK', and stays 'OK' for 10-15 minutes of use (the voltage can spike up as the power supply 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 Imgur. Or if you have your original supply, run a power saver device 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. Post by JoeG » Tue Feb 20, 2024 1:09 am. Got my old C64 out. Replacement power supply for Commodore 64 and VIC-20 WARNING C64 Brick of “Death” Power Supply. groepaz Usagi Yojimbo It seems when these Atari XL / XE Power supplies were made, Early C64 PSUs did not Hey everyone, After moving my C64 gear to another room and setting all the drives and C64 back up I was looking at all the power supplies, Personally I didn't see it being an issue as I have used an ATX power supply to run a hard drive and some other equipment on a test bench and it never gave me any problems. These are memories from back from my college days when I was using GeoWrite for word processing when everyone else was using WordStar. This site is dedicated to users of 8 bit Commodore Computer hardware. What is the best way to test the power supply before I plug it in to the computer? I have a multi-meter. 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. mathop Joe Blade Posts: 251 Joined: Sat Mar 04, 2017 12:43 pm. This over-voltage protection unit is designed to prevent damage to the Commodore 64 computer due to a failing power supply. Heather. For even more reference, Google "Ray Carlsen Commodore" and read his posts on repairing a variety of C64 issues. our C64 / C128 power supplies resemble a modern power supply with a slick shape of 125 mm x 59 mm x 42 mm (5. 2: The DC-DC converters are definitely the way 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. Report. I also tried using an LCD TV that had a C64 - Black screen, looks like a power issue. Made on quality parts such as a factory AC/DC and transformer. 50 (£14. Joe 02-19-2023, 10:57 PM . From personal experience (and I would be very very happy to be proven otherwise) finding a 9V AC supply is both difficult and expensive. Frequently bought together. Please see the pinned comment for more details. High-quality Commodore 64 replacement power supply unit (PSU). Forces a constant current from the power supply and measures voltage level and ripple. 5V trip 120 us delayed to avoid small spikes to trigger overvoltage protection (OVP). I have a box chock full of working original C64 power supplies, which is the main reason I wanted to build the SaV64. A picture of the power pack and the schematic from Zimmers site. The power supply normally produces a voltage slightly higher than 5V, because of a small resistor between the voltage regulator and ground in the power supply. 10 Volt, else the C64 will not work properly. So, I've just bought a C64 at a flea market and it was said to have a faulty datassette reader. 7 kg (1. Unfortunately it was one of those power supplies where everything inside the case has been glued into one big block filling the entire case. Another common power problem is a wonky power switch that doesn't The original power supply of my C64 was broken. As stated in the video, I am not affiliate Power supply (PSU) issues. Cheers, Oge. I am very aware that the original C64s power supplies were deathtraps with high possibility of causing damage to the C64s. KISS comes to mind. Before chucking the old black brick, cut off the power cable and use them on new power supplies so you don't need to find the right plug or solder the plug end in. I got both C64's without power supplies for $100, plus tax of 7. One of the C64's came with a working SD2IEC+, a Jupiter Lander cartridge, and a C64 diagnostics card. This The C64 PSUfrom Eletroware comes in a small cardboard box with a small booklet with instructions for proper use. They ship DHL to the US. cbm; C128. Ideally you would test the power supply both open circuit (no load attached) and then with a dummy load (power resistors selected to draw close to maximum amount of current the supply can put out. 4v dc is safe, and 8-11v AC is 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. Repairing my repairable C64 power supply. 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. 8" x 1. sys. The V is missing in the rating on the schematic it's 7. a I have a C64 power supply which was made by a company in Poland. Opening up a few of those power supplies was big motivation for us to design our I have a C64 power supply which was made by a company in Poland. New Commodore 64 power supply solution, looking almost the same as original part. 75%. NTSC Power dissipated in the resistor is: $$ P_{R1} = 125mA \times 3. 4" x 2. S. i'll bet at least 90% of C64 users these days are still using brick power supplies with no issues. The Pictorial C64 Fault Guide General tips - Power supply (PSU) It's advisable to at least check your PSU voltages before putting it to actual use, as sometimes its failure can result in overvoltage and kill chips inside a C64. Commodore used switching modules in its heavy duty power supplies, so I see no reason to not use them today. By 1985 just about any C= magazine would carry ads for replacement and / or repairable PSU. The C64s worldwide has the same power requirements, it was the power supply that differed. 9") resembles the original power supply series. 5 Ampere. Finally, you could use a 5 volt DC 2A phone charger to replace just the 5 volt supply at the power supply if you have no money to buy a new power supply. Just be sure to get a 5VDC and 9VAC power supply that you know are good quality to use along with it. 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. From what I have heard, these power old supplies commonly fail and output a high voltage. Keelog (in Europe) makes good replacements. Some SX-64 owners modify Commodore REUs to use an external power This is a project I've been working on for the past few months: an efficient C64 power supply with an emphasis on PROTECTION. When it fails one of the voltages, I forget which, jumps up to a C64 killing level. C64 power supplies are ancient, they go bad every day so use protection! - tebl/C64-Power-Saver. Weight only 0. Replacement power supply for Commodore 64 and VIC-20 Do You get +5v from the power supply at the switch with it in the "off" position. 1A AC ensure continued error-free operation of your C64. Pay great attention not to short-circuit anything, as on later C64 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. 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 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. Switchers are more reliable and much less prone to catastrophic failures but can still cause damage to the computer if they fail. I just tested the voltage and it is outputting 4. Switching power supplies are more efficient, so they run cooler and last longer. 1: You can not use the AC 9V to power any of the DC 5V circuit. Check out Ebay, search for "c64 over voltage" and you'll see what I mean. Contribute to Statik8bit/C64-power-supply-Pi-case development by creating an account on GitHub. New C64 power supply will cost you more than buying used C64 with used power supply. First, if your C64 has MT brand memory chips, suspect those as being the cause. The results are displayed in real time on a digital OLED display. Commodore International was an American home computer and electronics manufacturer founded by Jack Tramiel. Here’s the files for the Commodore 64 power supply I built in this video. What could it be? Suggestions on the back of an envelope please. Considering that little software outside of GEOS even uses the The standard C64 PSU model is a brand new replacement power supply for the Commodore 64 (and Commodore VIC20) home computers. 50/Unit) Free postage. I've bought several from them. C64 power supplies were made by at least three manufacturers. Diagnosing a PSU failure can prevent expensive repairs or even save your hardware from a total damage. Manage code changes In case you need to operate the power supply in higher ambient I recently purchased a Commodore 64 off eBay. When the device is turned on, a green LED lights up inside the case which can bee seen through the venting holes on the side of the unit. 7A @ 5V and 1A @ 9V. The third solution is to add the missing over-voltage protection between the power supply and the C64. No easy way if the c64 is the problem, just have to isolate parts till You find the problem. Commodore 64 Power Supply - C64 PSU, (UK 230VAC plug), Black, LED, Power supply (PSU) issues. 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 He starts with the power off and then turns it on and keeps on measuring voltages. 5. 96 V DC (which is good), but instead of 9V 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. . The power supply unit installed in a desktop PC has a capacity of Hi all! I just acquired my first real C64 (I previously had a DTV unit) yesterday. Search syntax tips. , Canada, Mexico, Japan, and others) › Also consider some Atari power supplies which also generate 9VAC at higher wattages. Modern power supply unit PSU for your vintage Commodore computer system. Here, I will explain in detail the most common signs of a power supply failure that will occur if the power supply unit going bad or fails as well as the reasons behind it and how you can extend the life of the power supply unit. The power supply was a "heavy duty" power supply that some one built to power a C64 and a These types of solutions work great if you want to forego a power saver. All the sources of information I've found have been very conflicting (been researching for a few days). Using a dual power supply solution with the SaV64 is just a feature. the power supply is good? Please check that the power supply has both 5V DC and 9V AC. The second is called Modern, and resembles a modern power supply with a slicker shape of 125 mm x 59 mm x 42 mm (5. Power supply failures are among the most common problems among all retro computer systems. Seems the first logical thing to do is replace the power supply. Well, I'm back from the Real It also occurs to me that perhaps the C64 is having some sort of issue with the high frequency the converter uses, and perhaps that's why it isn't working properly. They produce very little heat, and are much smaller than the Recomm replacements that people seem to use as replacements. 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 A replacement PSU for the Commodore C64, which works with 230V/115V - svenpetersen1965 Issues. D. 3" x 1. Yes, C64 DIN power is identical to VIC-20, except for the power supplies are rated for higher ampere so it will last longer and can take more load. Post by r. 6") Round DIN7 plug for C64 and DIN4 plug for FDD ; US-standard 120V AC power plug (U. 96 V DC (which is good), but instead of 9V Replacing the original Commodore 64 power supply may be the single most valuable step to prolong the life of the old hardware! The main issue with the original C64 power supplies is the 5V line. Search the web generally regarding the c64 power supply issue. They kill C64's in many ways. I had some weird issues with on C64 related to the power switch. BOSCH Inverters - The company is now doing these systems, due to supply chain issues with Carrier. Designed specifically for C64 and VIC-20 systems to preserve them in a pristine condition for years to come. 6") Round DIN7 plug for C64 and DIN4 plug for FDD The 5V DC voltage should fluctuate in a range of 4. Sometime in the last couple of months one of the plugs to the power supply was severed not knowing this i turned the C64 on and then it did this: Awesome! Thank you for the info about the joystick port, I never would have guessed! I ordered a new PSU (that I’ll keep in a switchable power strip) and now am waiting for both the computer and the power supply to come in. 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. Here is what I have come up with. The original c64 power supply itself only delivers up to 1. The first is called Classic and with a size of 86 mm x 70 mm x 48 mm (3. I have tried the power supply with a different c64 and it works, so the power supply isn't the issue. An over-voltage protection circuit could save my whole computer, so I Umbrel Node Issues upvote The original C64 power supply provides 9V AC and 5V DC. Collection of links and articles about the famous PET, VIC, C64, C128, TED, Amiga and PC Commodore machines. Statistically, you should be fine to use your old Commie with old power supply for few years. 0A DC output with anti-ripple filter Transformer-generated 9V/1. Schematic, BOM and gerber files are freely available at: (linear) supply a few years ago and 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. Commodore's original power supplies like to blow up your Commodore 64 as they age. Provide feedback We read every piece of feedback, and take your input very seriously. Post by eightbitswide » Mon Oct 30, 2017 12:54 pm. Plus the block is already bulging on the bottom. I’m really excited to get to using the c64 😁 Quick PSU diagnostics. I never use switching power supplies (or modules) in retro gear. 5V is the max rated voltage of C64 components idflyfish wrote:From Carlsen Electronics "A TESTER FOR THE C64 POWER SUPPLY ""Loss of the 9 volts AC will not damage the computer. That's doable. 0A DC output with anti 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 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. If it were an issue with the VIC-2, Since coming out of 20 year old storage it only ever used a brand new power supply. £14. risqq ixoqz chkwo jfh zpfdz mfxev gkcbnrs kwu txjsn avf