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| Thread ID: 141856 | 2016-03-11 18:27:00 | Converting 120v printer to 240v PCB | Nomad (952) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 1417304 | 2016-03-13 06:25:00 | What sort of printer is this? | Driftwood (5551) | ||
| 1417305 | 2016-03-13 06:33:00 | What sort of printer is this? Epson R2880 Photo (A3+ 13x19 inch). I bought that $25US part via South China Aliexpress. They must have a huge used computer recycling service there or something ..... I have noticed that the US's version have a fixed AC cable to the power board, the Asian version has a socket...... :eek: |
Nomad (952) | ||
| 1417306 | 2016-03-13 07:03:00 | The main board would be fine right if I swap in a 230/240 power board? Assuming the mainboard sustained no damage, and that there is no difference between the different power supply boards other than the line input, then yes, it should work just fine. |
Agent_24 (57) | ||
| 1417307 | 2016-03-13 07:38:00 | I don't want to rain on your parade Nomad, but anything from the US plugged in to our mains is likely to induce a catastrophic failure. Based on previous experience, the rectifiers should stand up to the increased voltage ok, and the filter cap might last several seconds before it shorts and blows the fuse, but the electronics (semiconductors and ICs) downstream from the DC supply are another matter altogether as they would suffer <100% overload. Some simple meter checks would help determine the viability of any repair as it could be a costly job. I am not quite as optimistic as Agent_24, I've seen too many write-offs from normal failures, let alone 100%+ overloads. Also, there would almost certainly have been an inductive spike from one or other (or both) power board inductors when the fuse blew, and that could have been upwards of 300-450 volts. I'd get a damage assessment from a suitably experienced serviceperson (not a board swapper) before investing any money in repairs. Have you thought about insurance? Your chances aren't good, but you might get lucky. Cheers Billy 8-{) |
Billy T (70) | ||
| 1417308 | 2016-03-13 07:47:00 | Was someone else's printer. Was free. We don't have contents insurance yes fire earthquake etc. I got that 36 dollar part from China. The assessment would cost $100. For repair labour 200? Parts 500? Would rather throw it out. It was free anyway. I have currently a older Epson 2100 that still works. One could even swap out the main board too but don't have software for eeprom..... Skip that and quit if it comes. |
Nomad (952) | ||
| 1417309 | 2016-03-14 00:56:00 | , let alone 100%+ overloads And power 400%. As a kid I was fiddling with a record player which had a 120V/240V switch. I wasn't sure which setting was correct so I left it on 120V. I thought that the lower voltage would be safer... It worked fine but a funny burning smell came from the fluorescent light in the ceiling. For a while. (Have to agree about the inductive spikes Billy) |
BBCmicro (15761) | ||
| 1417310 | 2016-03-14 02:11:00 | I don't want to rain on your parade Nomad, but anything from the US plugged in to our mains is likely to induce a catastrophic failure . Based on previous experience, the rectifiers should stand up to the increased voltage ok, and the filter cap might last several seconds before it shorts and blows the fuse, but the electronics (semiconductors and ICs) downstream from the DC supply are another matter altogether as they would suffer <100% overload . Wouldnt it be a switchmode power supply, so he may get lucky & only have power supply failure . Actual printer circuitry wouldnt have been hit with a 2x voltage , if volt reg kept working ? Just wondering . . . also consider personal liability issues if not qualified to do this sort of thing . |
1101 (13337) | ||
| 1417311 | 2016-03-14 02:22:00 | also consider personal liability issues if not qualified to do this sort of thing. Just as easy as taking apart my Nikon Coolscan film scanner. Just ribbon cables and plug in connectors like off a motherboard (2 wire). Shame the CS are no longer made and a motherboard cost as much as a complete unit. Don't blame them, there are no alternative unless one spends $10k USD (Imacon scanners), the $1k now aren't the same image quality. The printers are not that common here but wait for it and one could snag a working unit for $200-300. I arn't spending a $80 to fix it. |
Nomad (952) | ||
| 1417312 | 2016-03-14 07:08:00 | Wouldnt it be a switchmode power supply, so he may get lucky & only have power supply failure . Actual printer circuitry wouldnt have been hit with a 2x voltage , if volt reg kept working ? Yes it is a switching PSU. I also don't see the output going much higher (if at all) than normal. If the design is very similar to the 240v version, the switching transistor\IC(s) etc may even work fine on either voltage. The capacitor could be the only thing dead. Again, detailed photos showing components to check for damage is very helpful. Sometimes silicon parts can blow with very not much in the way of visible damage. |
Agent_24 (57) | ||
| 1417313 | 2016-03-14 21:38:00 | I have a few shots here :) Going off topic but I got a new board just hope the main board is not damaged and it isn't designed just for 120V . . dropbox . com/sh/pjox311r6csg0kf/AADkKnngyAyxXcKPP5anT9fBa?dl=0" target="_blank">www . dropbox . com |
Nomad (952) | ||
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