C64 power supply issue. Find a working C128 supply and swap a C64 cable onto it.

C64 power supply issue A picture of the power pack and the schematic from Zimmers site. This item: C64 FDD Dual PSU Modern Gray US - Replacement Commodore 64 + FDD 1541-II Power Supply, US Plug . A C128 power supply is a great option. C64-C128 PSU Adapter. 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 High-quality Commodore 64 replacement power supply unit (PSU). 0a. 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 C64 Over-Voltage Protection Recently, I purchased a Commodore 64 with the original power supply. Here are some answers. D. Prior I used PCAD, so thought this power supply would give me reason to learn Altium. This was designed by my long time supporter S. 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 quality C64 and VIC-20 Power Supply (Modern Replacement) These power supplies are produced by Electroware. C64 PSU Tester. Stabilized and filtered +5V/2. It also has an over A random reddit search brought me to you guys, and a read of the posts highlighted an issue with the c64 power supply. 6"). I also give some alternatives to rebuilding. Commodore 64 power supply unit (PSU) automated tester. Stabilized 5V/3. 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. 0A DC switching power module with an anti-ripple filter, along with a true transformer-based 9V/1. A reliable new Commodore 64 power supply has arrived. Pre-owned · Commodore. Dual power supply supports both C64 and FDD 1541-II series. ” It is a device that sits in between the power supply, and the C64, and what it does is it will cut off the power supply to the C64 if it goes out of spec, so it prevents it Notes. 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). Power adapter converting Commodore 64 DIN7 round plug to Commodore 128 DIN5 square plug. Also I would very much suggest that you get a “C64 Saver. It should be possible to load the 5 Volt of the external power supply with at least 1. Modern style chassis. As I do not own special equipment to measure e. But, I would not try this with the cart plugged into the C64. I've got an "untested" C64 coming from eBay, untested as they don't have any power cables etc. 6a/250v At the "shack" they just have 1. 50 (£14. 49. Designer LED-illuminated casing. Nevertheless, if a C64 power supply fails, it often kills the C64, so I would definately not connect it to any C64 again until it has either been repaired or replaced. 0A DC along with 9V/1. 230V AC This is on a PAL C64. 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. Then I'll build my own rebrick of the black C64 power brick as per the rebrick 3 part series on YouTube. 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 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. The product page on amazon says that it needs 5V@1A, but in other places some people are saying that it needs more, ideally a proper Raspberry Pi power supply with 5V@3A. This method has been done many times in the Arcade scene / repairs. 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. It's a lot lighter and more compact than the original C64 power supplies. I'm also on his Patreon site so happy to add my experiences to yours If it was me, I would purchase a Canakit power supply. My original vic20 is sitting in a box and looks like I'll have a winter project coming up. Converts Commodore C64 pinout to Commodore C128. Finally, a few pictures showing the damages that can occur during de-potting of the transformer. When I get it, Im gonna check inside to make sure nothing has exploded or rotten before I attempt to turn it on. 0" x 2. 5. 1: You can not use the AC 9V to power any of the DC 5V circuit. £13. Since I'm not the best with electronics, I didn't wanna build my own power supply, and I didn't wanna shell out 40 bucks for another c64 psu on ebay, especially since it could just go bad as well. When I power up the machine, the power led comes on and there is the usual brief black blank screen but the blue start screen never follows. 99. Do any of you recommend C64 PSUs that I HAVE NOT LISTED in this blog post? (A lot of people recently recommended Kevin Ottum's Nu Brick, so I have to add that) I'm looking specifically for ones that can be used in the U. High-quality replacement PSU for C64. Looking for the perfect C64 PSU ? You have found it! Features: - OLED Display - Touch Sensor. 5A, You can buy two power adapters and wire them to your old c64 plug, which is kind of messy. I also get the normal different voltage readings at RetroPower PSU C64 FDD Dual International Replacement Power Supply for Commodore 64 + FDD 1541-II, EU/UK/AU Plug 1 offer from £6599 £ 65 99 Next set of slides C128 to C64 power conversion. 4 lb) Compact enclosure with modern shape 125 mm x 59 mm x 42 mm (5. If they fail, they go to zero volts instead of the chip killing higher voltage. 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. 11A) outputs using heavy-duty transformer units. 7v-5. 5V trip 120 us delayed to avoid small spikes to trigger overvoltage protection (OVP). I have verified that the power supply and the LED light are good by using them on working boards. Repairing such a mess seemed This guide lists pictures of various Commodore 64 problem scenarios along with their descriptions and known causes. One way to do this would be a “crowbar” circuit that blows a fuse in case of an over-voltage. 5a or 2. bwack Source and I have a C64 power supply which was made by a company in Poland. These types of solutions work great if you want to forego a power saver. 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. The Our C64 PSU is modern, replacement power supply unit for Commodore C64 and VIC20. I have a box chock full of working original C64 power supplies, which is the main reason I wanted to build the SaV64. 1A AC ensure continued error-free operation of your C64. And there was! the 5vdc was working, but not the 9vac. 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. Replacement power supply for Commodore 64 and VIC-20 I picked up a bread bin C64 recently, and I'm building a new power supply for it. Here’s the files for the Commodore 64 power supply I built in this video. The C64 is really old and dusty, and the case wasn’t even properly closed. de only has the "no PSU" version in stock, so I need to get my own power supply. 5A to be the most it can send. Commodore 128 replacement PSU. What could it be? Suggestions on the back of an envelope please. 5 Ampere. Frequently bought together. It conveys +5V DC and 9V AC. S. The power supply on my pedals right now seems to be malfunctioning, i’ve tested all my pedals with a different power cable and they work just fine, what’s happening for me is the lights on the pedals are turning on, r/c64 • Power Supply Question. Some recommend dropping them altogether and using newer replacements instead. My issue is that I have four C64s (2 x breadbin + 2 x C64C) I still use the Commodore 1764 REU power supply. Reliable C128 power supply for years to come. So completely external to the existing supply. Buy one on Ebay 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. , Canada, Mexico, Japan, and others) › The C64 came with an original power supply and I’m using it right now since I can’t afford a modern replacement for it. If anyone has any tips they would like to share on testing the C64 power supply I would be very grateful. If your real You can try re-seating the plug and wiggling the wire as well - often they can be the culprit instead of the supply itself. Or if you have your original supply, run a power saver device with it. Because the C64 almost directly uses the 5V to power its chips, higher voltages can become dangerous for the Commodore 64. It will cut the 5v rail to the computer in case of an over voltage. Yet a common failure among Commodore 64/128 systems is the power supply. 0A DC output with anti-ripple filter Transformer-generated 9V/1. Hey thanks for the info guys and the link for Ray's. The main issue with the original C64 power supplies is the 5V line. However NES is quite common, its power supply is 9v ac 1 amp and it's fairly common around here. Heather. I decided to try and measure the 9VAC and 5VDC pin outs on the power supply with a multimeter. 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. 99 $ 79. And of course Penny makes an appearance. Maybe a new power supply is in order. Replacement power supply for Commodore 64 and VIC-20 Supposedly they are less prone to failure. These power supplies either fail by a broken voltage regulator, or by a shortcut in a diode. enough to melt that precious silicon! Your options are either to get a brand new power supply or combine your old one with a C64 power saver for as long as that'll still be around, Dual power supply supports both C64 and FDD 1541-II series. Skip to content. 96 V DC (which is good), but instead of 9V The C64 PSU was designed from scratch as a high-quality replacement for the original Commodore power supply. If the fault changes/improves, you have a good chance of pin pointing the faulty chip without soldering. They are very reliable and, unlike the original Commodore 64 and VIC-20 power supplies, will not fail in a way that destroys Commodore 64 Power Supply - C64 PSU, (UK 230VAC plug), Black, LED, Power Switch. dmackey828 Zorro Posts: 1268 Joined: Fri Jun 05, 2009 4:18 am Location: Fulton, NY Age: 57. 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. I have tried the power supply with a different c64 and it works, so the power supply isn't the issue. Power Supply Test Bench. 0 out of 5 stars Caution - Potential Overvoltage Issue with C64 PSU Modern Black US. Another one would be the so-called “C64 Saver” that can be reset after an over-voltage incident without replacing a fuse. In which the author discusses the very simple repair of his repairable power supply. Another common power problem is a wonky power switch that doesn't The original power supply of my C64 was broken. This is specifically why we have designed a replacement C64 and C128 PSU. Power supply failures are among the most common problems among all retro computer systems. There are numerous ways to test power supplies. Commodore 64 (C64) or VIC 20 Power Supply (PSU) With A Sensory Issue. I'm gonna get his cheap wall wart C64 supply for now just so I can begin testing these two c64s, 1541, and 1082 monitor. The power supply contains 1A diodes without any cooling, while it is rated for 1. I recently purchased a Commodore 64 off eBay. 6") Round DIN7 plug for C64 and DIN4 plug for FDD ; US-standard 120V AC power plug (U. This series of power supplies gives your system a fresh start, minimizing the risk of damage due to an ageing factory power supply. So for USA and Canada C64 users, they C64 Datassette power issue . High-quality Commodore 64 replacement power supply unit (PSU). I just tested the voltage and it is outputting 4. Multiple enclosure sizes and colors, LED illumination. You can buy aftermarket power supplies EX USA and ship them over. It contains a +5V/2. I have a C64c that I am trying to repair, starting diagnosis with the power supply. The tester features an aluminum heat sink to perform long-term tests. Provides stable filtered 5VDC (up to 4. 2: The DC-DC converters are definitely the way Robust and reliable design. 1A In this episode I detail how I go about rebuilding C64 power supplies. Seems the first logical thing to do is replace the power supply. 0A DC output with anti-ripple filter. I changed a lot of PLA's and memory controllers, when I hand made my own linear supply I haven't changed much either of those. My current best approach to suggest is to use the Electroware C64 PSU(s). So, I've just bought a C64 at a flea market and it was said to have a faulty datassette reader. Follow the Commodore spec for your connections, using a multimeter for confirmation, as the wire colors may not always be correct. . I'm trying to find a range of voltages that are safe, sort of like a GO/NO GO gauge for my supply. Navigation Menu Toggle navigation. VIC-20, C64, C128, Amiga 500, 600, 1200, CD32 The power's back! There are 15 products. 26 posts Previous; 1; 2; SysopSID William Wobbler Posts: 57 So I noticed a slight issue with my power supply today. For help with C64 hardware, software etc. 14 volts DC constantly. Robust and reliable. Just push a known good memory chip over the chip to be tested. 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. This page describes how to fix your power supply. An alternative to protecting your Commodore 64 from power surge when using an original power supply - costs less than a modern power supply. Replacement power supply for Commodore 64 and VIC-20 If your power supply is out of spec it will cause physical damage to the machine and the chips inside of it. 8" x 2. It is called the C64 PSU and the power supply has stabilized 5VDC (2A) and 9VAC (1. The problem is with the Commodore 64 itself. Some people are saying 4. Full-featured Amiga 500 PSU optimized for size and performance. Thanks. Is the same issue valid for the vic20? If so, what resellers of psu do you recommend? I'm in the EU. I already C64 power supply which hasn't been used in years. I have Altium and been wanting to learn the program better. The video output is showing some faint "ripples" running vertically down the screen. Amiga 500 power supply. For more current DC-DC converter should be changed or heatsinked. The C128-C64 power supply adapter converts from the Commodore 128 square DIN5 power plug standard to the Commodore 64 round DIN7 power plug. From personal experience (and I would be very very happy to be proven otherwise) finding a 9V AC supply is both difficult and expensive. Conveys 9V AC and +5V DC. Several years ago I used a 5V switching supply for C64 repairs. 1A The sole purpose of a switching power supply is efficiency, which really isn't needed in old retro gear as it consumes low power as is. C64 Over Voltage Protector (sometimes called C64 Savers) Build one of your own. Because Rafał claims we can draw up to 3A from his supply, I also included my brand new 1541 Ultimate cartridge. 2" x 2. To test your The piggy back method gives you an educated guess identifying the faulty IC. An over-voltage protection circuit could save my whole computer, so I UPDATE, 6 Mar 2021: I've solved this problem. Those chips can be time consuming and expensive to replace, if they're available at all! Power Supply Overview. Sitting in open air, the regulator overheated, so I suspect the epoxy pulled Plus I have no idea if PAL SNES power supply would work right with 60Hz power. If you use a 50Hz transformer in a NTSC region, or 60Hz in a PAL region, I'd expect the only issue to be the TOD clock running slightly slower or faster than normal. Find a working C128 supply and swap a C64 cable onto it. Modern power supply unit PSU for your vintage Commodore computer system. Here is what I have come up with. 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 added 3 overvoltage protections based on MC3423: 1) 5. Replacement power supply for Commodore 64 and VIC-20 Stabilized 5V/2. C Power supply delivers current well slighlty higher than 2 A from 5V line. Just be sure to get a 5VDC and 9VAC power supply that you know are good quality to use along with it. Years ago I modded a C64 to run from a PC power supply with only 5 and 12VDC (no I used this occassion as an excuse to “de-dust” all of my disk drives and use them as parts of testing sets. 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. 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. High-quality Commodore 64 replacement power supply unit (PSU) with an additional power output for an FDD 1541-II/1571-II/1581. You will be able to unplug and use the "Jackulator" as I am calling it with any C64 power supply. 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. Quality confirmed by thousands of C= users worldwide! Electroware Shop The only negative issue was that this psu is a Dual power supply supports both C64 and FDD 1541-II series ; › See more product details Report an issue with this product or seller. I personally use a 128 power supply on my C64 computers and I have no issues with the 1541 UII. The power supply has a sturdy custom-made chassis with an OLED digital display monitoring the output voltage and uptime. M. £14. and all the files to make your own are provided publicly and free of charge: Documentation (pdf): Now that I did a bit of research, I first checked the power supply to see if there was an issue there. Using a dual power supply solution with the SaV64 is just a feature. Get it as soon as Tuesday, Nov 12. Post by JoeG » Tue Feb 20, The board is a 250425. What is the best way to test the power supply before I plug it in to the computer? Hi Antonio, thanks for the comment. C64 - Black screen, looks like a power issue. For comparison, I used voltage values from five original Commodore 64 power supplies (a variety of beige and browns orignal C64 PSU’s) as well as a state-of-the-art I have a C64c that I am trying to repair, starting diagnosis with the power supply. Since, I've devoted more time to repairing the stuff I obtained, and less time on the power supply. Unfortunately I bought some C64 stuff to avoid practicing power supply designs on my original. RetroPower PSU C64 OLED Digital International - Replacement Commodore 64 Power Supply. ripple noise I therefore simply used my multimeter for the voltage tests. Round DIN7 plug matching the original C64 PSU pinout. Reviewed in the United States on January 11, 2024. 5VA and not 7. 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. 6") Round DIN7 plug for C64 and DIN4 plug for FDD. 50/Unit) Free In proper hands they have a chance of surviving another 30 years. The SaV64 is designed to be used with the original C64 power supply. Plenty of power and works great to this day. The results are displayed in real time on a digital OLED display. Runs cold. Our stylish C64 power supply should keep your Commodore64 running for another 40+ years. Designed specifically for C64 and VIC-20 systems to preserve them in a pristine condition for years to come. The C128-C64 power adapter is made of high quality connectors and cables. 5V is the max rated voltage of C64 components Power Supply Issue . For Ultimate II+ do not use auxiliary power supply, so the PSU must provide whole power. Most likely it only requires as much as the mini. Well, I'm back from the Real It also occurs to me that perhaps the C64 is having some sort of issue with the C64 Power Supply Units. Unfortunately it was one of those power supplies where everything inside the case has been glued into one big block filling the entire case. 0") Round DIN7 plug for C64 and DIN4 plug for FDD. 5A) so don't think it's that. Top. When I power up the machine, the power led comes on and there is the usual brief black blank Last year I took all the heat sink from a junk C64 power supply and mounted a linear regulator to it. g. This issue however is new to me- I have no video signal at all. Replacement power supply for Commodore 128. Results are displayed in real time on a digital OLED display. 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. Power Supply Overview. C64 power supplies are ancient, they go bad every day so use protection! - tebl/C64-Power-Saver. I have a voltage monitor on my C64, and this power supply hums along at 5. Commodore's original power supplies like to blow up your Commodore 64 as they age. Any one know where I can get a fuse for the power supply that came with the 1764 REU? 1. Commodore International was an American home computer and electronics manufacturer founded by Jack Tramiel. $79. EU-standard 230V AC Power supply failures are among the most common problems among all retro computer systems. I'm considering buying a TheC64 Maxi, but amazon. They give a solid power source to raspberry pi device. I checked the voltage for the power supply since I heard they could kill your system at any given time and it was fine, 10V AC and 5V DC. The V is missing in the rating on the schematic it's 7. 0A!) by industrial grade AC/DC power supply and full 9VAC (1,11A max) provided by classic heavy duty linear 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. From what I have heard, these power old supplies commonly fail and output a high voltage. If the power falls away, it doesn't sound like the typical overvoltage situation for a C64 PSU. 3" x 1. 7 kg (1. Also, I should mention I'm using an official raspberry pi power supply (2. Replacement power supply for Commodore 64 and VIC-20 Buy commodore 64 power supply products and get the best deals at the lowest prices on eBay! New listing Commodore 64 C64 / VIC-20 Power Supply Unit PSU (Beige) - Tested and Working. The C64, C128, Plus/4 Amiga, Atari, ZX Spectrum, Sinclair QL, TI-99/4A, and ColecoVision PSU was designed from scratch as a high-quality replacement for the original power supply. Weight only 0. 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. The third solution is to add the missing over-voltage protection between the power supply and the C64. I've just returned to the C64 after a 33 year hiatus. New Model Choice of UK, Europe & High-quality Commodore 64 replacement power supply unit (PSU). All the sources of information I've found have been very conflicting (been researching for a few days). User Control Panel 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 Forces a constant current from the power supply and measures voltage level and ripple. 4 lb) Custom designed high quality enclosure 158 mm x 71 mm x 51 mm (6. Thanks 2. Forces a constant current from the power supply and measures voltage levels and ripple. Wire for C64 Power Supply. Moderator: Lemoners. Link to buy one enjoy. So I do not think you will measure excessive voltage at the PSU. The case was designed to fit the illuminated Commodore Logo or 64 Logo (in my repository). 5A. our C64 / C128 power supplies resemble a modern power supply with a slick shape of 125 mm x 59 mm x 42 mm (5. 4v dc is safe, and 8-11v AC is Repairing my repairable C64 power supply. Post by dmackey828 » Sun Jul C64 Power Supply . Sort by: The plot thickens. spannernick Zorro Posts: 1146 Joined: Thu Mar 29, 2012 2:53 pm Location: London,UK Age: 53. I posted about the issue's it is having over on the AtariAge forum. I think the c64 maxi uses a micro-usb which I believe 2. Commodore - changing the world 8 Power supply failures are among the most common problems among all retro computer systems. 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. They supply a more correct AC voltage The C64 PSU was designed from scratch as a high-quality replacement for the original Commodore power supply. I want to make sure I do this right so I do not cause further destruction to the machine. I have these two wall warts: 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. hldo bobore cezkx gwqtp kicksrb dpznpn qwbs tfci plvwc dzp