C64 power supply issue. A C128 power supply is a great option.
- C64 power supply issue Frequently bought together. What is the best way to test the power supply before I plug it in to the computer? I have a multi-meter. 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) I have a C64 power supply which was made by a company in Poland. Try leaving your C64 power switch on, and only switch it on and off using a power strip. My rule of thumb is if it originally used a linear supply, stay with a linear supply. NTSC I have a C64 power supply which was made by a company in Poland. pcwzrd13 wrote:So I noticed a slight issue with my power supply today. 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. 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 WARNING C64 Brick of “Death” Power Supply. 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. New C64 power supply will cost you more than buying used C64 with used power supply. 8" x 2. My concern is that the C64 I got has the original power supply. In which the author discusses the very simple repair of his repairable power supply. Some recommend dropping them altogether and using newer replacements instead. For more current DC-DC converter should be changed or heatsinked. a Connected to the same mains supply line, my OE C64 power supply puts out 9. 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. our C64 / C128 power supplies resemble a modern power supply with a slick shape of 125 mm x 59 mm x 42 mm (5. It is all integrated into small enclosure and dimensions similar to the original Commodore PSU. The case was designed to The standard C64 PSU model is a brand new replacement power supply for the Commodore 64 (and Commodore VIC20) home computers. I tend to use the CannaKit brand power supplies for my Pis and other devices. Joined Of course you can find several other sources of 9VAC, at least up to 2A. But, I would not try this with the cart plugged into the C64. 96 V DC (which is good), but instead of 9V So, the other day whilst (admittedly) working in a messy environment, I managed to fry some RAM chips in my C64. This is a project I've been working on for the past few months: an efficient C64 power supply with an emphasis on PROTECTION. Commodore International was an American home computer and electronics manufacturer founded by Jack Tramiel. A replacement PSU for the Commodore C64, which works with 230V/115V - svenpetersen1965 Issues. yes get a 'proper' power supply. 14 volts DC constantly. Commodore used switching modules in its heavy duty power 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. I have a voltage monitor on my C64, and this power supply hums along at 5. I sure hope that UPDATE: The have been some reports of issues using the Keelog PSU. 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. This was designed by my long time supporter S. Commodore's original power supplies like to blow up your Commodore 64 as they age. A reliable new Commodore 64 power supply has arrived. 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. I recently purchased a Commodore 64 off eBay. I posted about the issue's it is having over on the AtariAge forum. I have tried the power supply with a different c64 and it works, so the power supply isn't the issue. Power supply (PSU) issues. 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. What could it be? Suggestions on the back of an envelope please. £14. 2. 92A. It The reason why the C64 power supply damages C64's when it fails is because of a voltage regulator that fails inside the brick. It's a lot lighter and more compact than the original C64 power supplies. Helpful. Forums. I have a box chock full of working original C64 power supplies, which is the main reason I wanted to build the SaV64. To do so, refer to the power supply connector pinout and use a tester. 0") Round DIN7 plug for C64 and DIN4 plug for FDD. So the fault is in the c64. C64 - Black screen, looks like a power issue. Also, I should mention I'm using an official raspberry pi power supply (2. Communities where you can ask for help with your C64 issues: Lemon64 forums; Comp. 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. The main issue with the old power supplies is the 5V regulator. For even more reference, Google "Ray Carlsen Commodore" and read his posts on repairing a variety of C64 issues. The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. Designed specifically for C64 and VIC-20 systems to preserve them in a pristine condition for years to 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. My current best approach to suggest is to use the Electroware C64 PSU(s). I'd expect the only issue to be the TOD clock running slightly slower or faster than normal. From personal experience (and I would be very very happy to be proven otherwise) finding a 9V AC supply is both difficult and expensive. Jeffrey. Made on quality parts such as a factory AC/DC and transformer. Replacement power supply for Commodore 64 and VIC-20 The epoxy resin was only good at giving heat issues and making the components die sooner. The 5v current on my power supply dropped from ~1. The power supply contains 1A diodes without any cooling, while it is rated for 1. The C64 and C128 power supplies are available in two shapes. 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). They unplugged and Modern power supply unit PSU for your vintage Commodore computer system. I just vaguely recall issues back then with some hacked/modified 1541 drives. 7v Your PSU is suspect, if 5v Your c64 is somewhere pulling down the +5v. Just be sure to get a 5VDC and 9VAC power supply that you know are good quality to use along with it. 0A DC output with anti RetroPower PSU C64 OLED Digital International - Replacement Commodore 64 Power Supply. 44W $$ That's a much more reasonable power for the regulator to C64 Over-Voltage Protection Recently, I purchased a Commodore 64 with the original power supply. After-market power supplies, even switching types, can fail at any time. 5. New Model Choice of UK, Europe & About this item . S. Contribute to Statik8bit/C64-power-supply-Pi-case development by creating an account on GitHub. 0A DC along with 9V/1. Do You get +5v from the power supply at the switch with it in the "off" position. 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. Switchers are more reliable and much less prone to catastrophic failures but can still cause damage to the computer if they fail. One of the ways the Commodore "brick" power supply can fail is from a shorted internal 5 volt regulator. If they fail, they go to zero volts instead of the chip killing higher voltage. Please see the pinned comment for more details. The problem is with the Commodore 64 itself. (JLCPCB, PCBway, OSH Park, etc. Use it as a tool to assist in diagnosing C64 issues, to get a general idea of what might be wrong with your machine. 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? The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. Repairing my repairable C64 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. com forums; Forum64. I've bought several from them. Moderator: Lemoners. 2 people found this helpful. Here are some answers. 5V = 0. I have a C64 power supply which was made by a company in Poland. Provides stable filtered 5VDC (up to 4. 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. Diagnosing a PSU failure can prevent 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. I think my problem comes from either dodgy power socket on The power supply is one of the most integral part of any electronic circuit. Search the web generally regarding the c64 power supply issue. The power supply was a "heavy duty" power supply that some one built to power a C64 and a Dual power supply supports both C64 and FDD 1541-II series. Someone on the Denial forum a few years ago replaced it with a DIN connector and fed the 9VAC 1A from a newer VIC/C64 DIN power supply. Black wires are ground ( 0V ) levels. 4 lb) Custom designed high quality enclosure 158 mm x 71 mm x 51 mm (6. 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. Hi Antonio, thanks for the comment. I already C64 power supply which hasn't been used in years. M. 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 I tried another supply, same result on the c64, and same result on measuring the pinouts. 5 Ampere. Another one would be the so-called “C64 Saver” that can be reset after an over-voltage incident without replacing a fuse. They kill C64's in many ways. A picture of the power pack and the schematic from Zimmers site. Post by eightbitswide » Mon Oct 30, 2017 12:54 pm. 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 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. Another common power problem is a wonky power switch that doesn't This guide lists pictures of various Commodore 64 problem scenarios along with their descriptions and known causes. There are four pins/holes at these connectors, with four wires to the supply. K. I had some weird issues with on C64 related to the power switch. 3" x 1. 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. (The transformer can be substituted with a Talema 70041k if you can't find the Amgis) * Solder the fuse holder, spade connectors, resistor, and 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 First, if your C64 has MT brand memory chips, suspect those as being the cause. 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 C64 and VIC-20 Power Supply (Modern Replacement) These power supplies are produced by Electroware. This site is dedicated to users of 8 bit Commodore Computer C64 power supplies are ancient, they go bad every day so use protection! - Issues · tebl/C64-Power-Saver At best that is a quality refurbishment of an old power supply. So that may be the core issue. Joe 02-19-2023, 10:57 PM . 2" x 2. 6") Round DIN7 plug for C64 and DIN4 plug for FDD ; US-standard 120V AC power plug (U. 5A. It's an online C64 repair bible. 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. spannernick Zorro Posts: 1146 Joined: Thu Mar 29, 2012 2:53 pm Location: London,UK Age: 53. I have these two wall warts: The power supply has a sturdy custom-made chassis with an OLED digital display monitoring the output voltage and uptime. Personally, I have been repairing commodores for years and haven't run across one yet. When I switched to better one picture cleared. 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). High-quality Commodore 64 replacement power supply unit (PSU). 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. 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. org » Amiga computer related discussion » Amiga Hardware Issues and discussion » CD32 and C64 power supplies C64 Power Supply . I’ve seen some debate about using switching power supplies vs using traditional linear power supplies. C64 power supplies are ancient, repositories, users, issues, pull requests Search Clear. The issue I noticed when I built mine: when turning on the C64, This over-voltage protection unit is designed to prevent damage to the Commodore 64 computer due to a failing power supply. Or if you have your original supply, run a power saver device with it. 5V is the max rated voltage of C64 components The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. Having said that, it is probably one of the most overthought, overengineered components as well. Pre-owned · Commodore. 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 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. You have options here, either make your own from scratch, buy a new modern replacement, or use the old one by swapping in a 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. An alternative to protecting your Commodore 64 from power surge when using an original power supply - costs less than a modern power supply. This item: C64 PSU Modern Black US - Replacement Commodore 64 Power Supply Stabilized and filtered +5V/2. They ship DHL to the US. 1A AC ensure continued error-free operation of your C64. This The old Commodore 64 power supplies are prone to failure with over-voltage on the 5V line that will destroy your computer. As stated in the video, I am not affiliate the power supply is good? Please check that the power supply has both 5V DC and 9V AC. Seems the first logical thing to do is replace the power supply. 7. 9") resembles the original power supply series. Considering that little software outside of GEOS even uses the 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. KISS comes to mind. This page describes how to fix your power supply. 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. Cheap and good solution to produce new power supplies for C64. An over-voltage protection circuit could save my whole computer, so I Umbrel Node Issues upvote I picked up a bread bin C64 recently, and I'm building a new power supply for it. 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. [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. Designed specifically for C64 and VIC-20 systems to preserve them in a pristine condition for years to come. , Canada, Mexico, Japan, and others) › He starts with the power off and then turns it on and keeps on measuring voltages. When it eventually fails (and it will!), from e. 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 Most of the c64 power saver designs cut power around 5. RAM, or maybe your 6502 processor are dead when over 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. Statistically, you should be fine to use your old Commie with old power supply for few years. Repairing such a mess seemed You can try re-seating the plug and wiggling the wire as well - often they can be the culprit instead of the supply itself. dmantione Rick Dangerous Posts: 1862 Joined: Mon Feb 12, 2018 8:40 pm Location 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. bwack Source and Forces a constant current from the power supply and measures voltage level and ripple. These are memories from back from my college days when I was using GeoWrite for word processing when everyone else was using WordStar. 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. All the sources of information I've found have been very conflicting (been researching for a few days). BOSCH Inverters - The company is now doing these systems, due to supply chain issues with Carrier. They produce very little heat, and are much smaller than the Recomm replacements that people seem to use as replacements. 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. 7A @ 5V and 1A @ 9V. Weight only 0. Follow the Commodore spec for your connections, using a multimeter for confirmation, as the wire colors may not always be correct. The C64 PSU chassis are available in colors black and gray. Report. The reason? I accidentally plugged in the wrong power supply. One of the C64's came with a working SD2IEC+, a Jupiter Lander cartridge, and a C64 diagnostics card. 6") Round DIN7 plug for C64 and DIN4 plug for FDD The original C64 power supply provides 9V AC and 5V DC. Some people are saying 4. I'd guess an issue with the RF module. so I would say. 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 Power supply delivers current well slighlty higher than 2 A from 5V line. When dealing with Single board computers, I have found it best to splurge and get a good power supply. They are notorious for being horrible chips and can cause the diagnostic cartridge to show strange results. Welcome, Guest. . The results are displayed in real time on a digital OLED display. Commodore 64 Power Supply - C64 PSU, (UK 230VAC plug), Black, LED, Find a working C128 supply and swap a C64 cable onto it. 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 Buy C64 PSU Modern Gray US - Replacement Commodore 64 Power Supply, US Plug: Internal Power Supplies - Amazon. 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 The main issue with the original C64 power supplies is the 5V line. 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. 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. 5A) so don't think it's that. Got a new power supply for it. D. The The SaV64 is designed to be used with the original C64 power supply. Check out Ebay, search for "c64 over voltage" and you'll see what I mean. Heather. " 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. I got both C64's without power supplies for $100, plus tax of 7. 50/Unit) Free postage. 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. I never use switching power supplies (or modules) in retro gear. In this video, I do a teard These types of solutions work great if you want to forego a power saver. The V is missing in the rating on the schematic it's 7. 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. 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. 50 (£14. A damaged power supply may give you a black screen on a perfectly High-quality Commodore 64 replacement power supply unit (PSU). Maybe a new power supply is in order. This Saver is designed to 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. 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. 4v dc is safe, and 8-11v AC is This is on a PAL C64. a shorted internal 5V regulator, it will put excessive voltage into the computer and damages delicate chips such The original power supply of my C64 was broken. 9VAC. 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 Power supply (PSU) issues. Replacement power supply for Commodore 64 and VIC-20; Stabilized 5V/2. eightbitswide Mikie Posts: 466 Joined: Sun Oct 02, 2016 3:01 pm Age: 53. When it fails one of the voltages, I forget which, jumps up to a C64 killing level. UPDATE, 6 Mar 2021: I've solved this problem. Read more. After my C64 has been on for several hours, I open it up and check them and they are barely warm. A C128 power supply is a great option. 96 V DC (which is good), but instead of 9V The C64-Plus/4 power adapter is intended for use only with Commodore C64 and Plus/4 systems. 96 V DC (which is good), but instead of 9V. 44W $$ Consequently, power dissipated in the regulator has fallen to: $$ P_{U1} = 125mA \times 3. Here’s the files for the Commodore 64 power supply I built in this video. And use the original power supplies for doorstops only. Please login or register. 8" x 1. From what I have heard, these power old supplies commonly fail and output a high voltage. Forums Board Topic Register; Amiga. It should be possible to load the 5 Volt of the external power supply with at least 1. The video output is showing some faint "ripples" running vertically down the screen. mathop Joe Blade Posts: 251 Joined: Sat Mar 04, 2017 12:43 pm. 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. Plus the block is already bulging on the bottom. i'll bet at least 90% of C64 users these days are still using brick power supplies with no issues. 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. Usually being potted, you cant replace that regulator. One way to do this would be a “crowbar” circuit that blows a fuse in case of an over-voltage. The 5V DC voltage should fluctuate in a range of 4. 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 Got my old C64 out. They're in a nice little metal case that nearly matches the Thanks for discussing these issues, by the way -- it's interesting to see the design process that others go through . I looked this up and it seems to be a common issue with homemade power supplies. 0A DC output with anti-ripple filter Transformer-generated 9V/1. It simply replaces the original (and unreliable!!) Commodore power supplies. It will cut the 5v rail to the computer in case of an over voltage. 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. Provide feedback We read every piece of feedback, and take your input very seriously. 7v-5. I’m really excited to get to using the c64 😁 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 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 C64s worldwide has the same power requirements, it was the power supply that differed. 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. Your kindle charger may work The original c64 power supply itself only delivers up to 1. 5V trip 120 us delayed to avoid small spikes to trigger overvoltage protection (OVP). but i think this is a bit overblown. 0" x 2. In figure_2 you can see one of these standard cords. Collection of links and articles about the famous PET, VIC, C64, C128, TED, Amiga and PC Commodore machines. I did make a couple mistake, one no spot for a parallel resistor as described in his note: To ensure correct operation, I use a variable bench DC supply and a very accurate voltmeter to test and adjust all my Saver 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. You will be able to unplug and use the "Jackulator" as I am calling it with any C64 power supply. 230V AC Power supply (PSU) issues. I have another power supply that's causing some pretty good interference on the computer it's used on. Click & Collect. 96 V DC (which is good), but instead of 9V Report an issue with this product. Modern style chassis. The cable by itself isn't known to have problem, only those Also consider some Atari power supplies which also generate 9VAC at higher wattages. No easy way if the c64 is the problem, just have to isolate parts till You find the problem. Stabilized and filtered +5V/2. This time however it's not a ground loop issue. Plan and track work Code Review. The first is called Classic and with a size of 86 mm x 70 mm x 48 mm (3. 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. The 1581 I think has full access to its components so these parts can be replaced. 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. Looking for the perfect C64 PSU ? You have found it! Features: - OLED Display - Touch Sensor. That fault puts excessive voltage into the computer and damages chips such as RAM very quickly and silently. Suitable for many available 3d-printed enclosures available on web. I also tried using an LCD TV that had a 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. Link to buy one enjoy. Power supply failures are among the most common problems among all retro computer systems. Our stylish C64 power supply should keep your Commodore64 running for another 40+ years. So completely external to the existing supply. Include my email address so I can be contacted. 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 Good C64 OEM power supplies are getting more and more rare as they age, as we all know. 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 C64 Datassette power issue . 7 kg (1. 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. Check voltages, voltages were way too high on mine which caused issues with my c64. There are tons of options for new modern power supplies, some of which are quite cheap. 30A to 0. 0A!) by industrial grade AC/DC power supply and full 9VAC (1,11A max) provided by classic heavy duty linear transformer unit. g. I just tested the voltage and it is outputting 4. 5VA and not 7. I am very aware that the original C64s power supplies were deathtraps with high possibility of causing damage to the C64s. 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. 4" x 2. Reviewed in the United States on January 11, 2024. I personally use a 128 power supply on my C64 computers and I have no issues with the 1541 UII. Post by JoeG » Tue Feb 20, 2024 1:09 am. Unfortunately it was one of those power supplies where everything inside the case has been glued into one big block filling the entire case. reddit The plot thickens. The more critical, 5VDC supply from the Keelog looks Does anyone know if the 12v issue is only with US 120v Power Supplies, and not an issue with EU/UK 230v Power Supplies? Top. Our C64 PSU is modern, replacement power supply unit for Commodore C64 and VIC20. Keelog (in Europe) makes good replacements. Manage code changes In case you need to operate the power supply in higher ambient temperatures, you should consider PETG or ABS for printing or install the PSU in a metal case. Commodore International (CI), along with its subsidiary Commodore Business Machines (CBM), was a significant participant in the development of the home-computer industry in the 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. I'm trying to find a range of voltages that are safe, sort of like a GO/NO GO gauge for my supply. 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. 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. For help with C64 hardware, software etc. POWER PACK: +5VDC at 1. That's why I tried with my makeshift power supply and it booted fine. Schematic, BOM and gerber files are freely available at: (linear) supply a few years ago and been planning to make a switching. Except noise and interference from bad quality 5V PSU. KevinO Experienced Member. groepaz Usagi Yojimbo It seems when these Atari XL / XE Power supplies were made, Early C64 PSUs did not Definitely something on the c64 side then. Cheers, Oge. Here is what I have come up with. New Commodore 64 power supply solution, looking almost the same as original part. 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. Top. cbm; C128. I'm also on his Patreon site so happy to add my experiences to yours Switching vs linear power supplies for the C-64. 75%. Notes. sys. 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, 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. Opening up a few of those power supplies was big motivation for us to design our High-quality Commodore 64 replacement power supply unit (PSU). Using a dual power supply solution with the SaV64 is just a feature. I didn't really see any solid solutions though. 6"). Have a look at our wiki: https://www. 0 out of 5 stars Caution - Potential Overvoltage Issue with C64 PSU Modern Black US. idflyfish wrote:From Carlsen Electronics "A TESTER FOR THE C64 POWER SUPPLY ""Loss of the 9 volts AC will not damage the computer. 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 Imgur. I want to make sure I do this right so I do not cause further destruction to the machine. and all the files to make your own are provided publicly and free of charge: Documentation (pdf): 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. CD32 and C64 power supplies - Page 1. 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 * Order the PCB from your choice of PCB fab. C64 power supplies were made by at least three manufacturers. Runs cold. The standard C64 PSU model has more than twice the power (20W vs. Any comments on typical issues would be great. Search syntax tips. Being under powered can cause all sorts of weird and hard to troubleshoot problems. However they may be just as rare as the VIC-20 one. This power supply is repairable/revisable. Replacement power supply for Commodore 64 and VIC-20 For those familiar with my Re-Brick C64 Power Supplies, these use the same internal design, but with all new parts. That voltage will never be high or low it's there or it isn't. Replacement power supply for Commodore 64 and VIC-20 The vast majority of these power supplies is recognizable by general-purpose plastic enclosures and internal components wired up in a true DIY style. 1: You can not use the AC 9V to power any of the DC 5V circuit. 5A, which is quite questionable. The stock power supply is known for going catastrophically bad and damaging the C64. 5W) compared to the original C64 power supplies. Has protection solutions, so it will not blow up your C64. 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. They tended to fail in a bad way, The third solution is to add the missing over-voltage protection between the power supply and the C64. com FREE DELIVERY possible on eligible purchases. 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: Quick PSU diagnostics. 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. Replacement power supply for Commodore 64 and VIC-20 Stabilized 5V/2. Power dissipated in the resistor is: $$ P_{R1} = 125mA \times 3. 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 High-quality Commodore 64 replacement power supply unit (PSU) with an additional power output for an FDD 1541-II/1571-II/1581. 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. If You get 4. 95 to 5. Pay great attention not to short-circuit anything, as on later C64 power supplies the internal fuse cannot be replaced. It only conveys +5V DC and 9V AC power, and does not guarantee sufficient current output of the attached power supply. 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. 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 Hi all! I just acquired my first real C64 (I previously had a DTV unit) yesterday. 5-8. 6v. I added 3 overvoltage protections based on MC3423: 1) 5. Some SX-64 owners modify Commodore REUs to use an external power 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. C64 power supplies are ancient, they go bad every day so use protection! - tebl/C64-Power-Saver. This issue however is new to me- I have no video signal at all. ) * Order the parts necessary as listed in the BOM. But I am wondering if these are too good to be true. pamvrcy mfixz mtkgh rkwncs syjhc dwfmj scrpriyh vbn biddno kcff