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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Gateway 1995 P5 power supply specs
It's under another (KVM'd) computer and I don't really have the space to
leave it open a week, so I'm trying to guess how/if to replace the power supply. (how) Amazon sells a cheap one as Apevia ATX-VS450W Venus 450W ATX It seems the specs are GATEWAY POW0016A01 145 WATT POWER SUPPLY P5-75 P5-120 ASTEC SA145-3435 and that (I guess) my main issue is the bus. The cheapest exact match I've found sells for five times the one on Amazon. Is there such a thing as a "universal" power supply? (if) Now, what seems to be wrong? I hadn't touche dth emachine all summer. THen it went on but couldn't find the hard drive. Evetually after about ten times it did. It worked daily for about ten days. I didn't use it for about a month, after which it refuses to turn on. So I'm GUESSING it's the power supply. - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus blog: panix.com/~vjp2/ruminatn.htm - = - web: panix.com/~vjp2/vasos.htm facebook.com/vasjpan2 - linkedin.com/in/vasjpan02 - biostrategist.com ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- |
#2
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Gateway 1995 P5 power supply specs
On Monday, 27 November 2017 21:42:28 UTC, wrote:
It's under another (KVM'd) computer and I don't really have the space to leave it open a week, so I'm trying to guess how/if to replace the power supply. (how) Amazon sells a cheap one as Apevia ATX-VS450W Venus 450W ATX It seems the specs are GATEWAY POW0016A01 145 WATT POWER SUPPLY P5-75 P5-120 ASTEC SA145-3435 and that (I guess) my main issue is the bus. The cheapest exact match I've found sells for five times the one on Amazon. Is there such a thing as a "universal" power supply? (if) Now, what seems to be wrong? I hadn't touche dth emachine all summer. THen it went on but couldn't find the hard drive. Evetually after about ten times it did. It worked daily for about ten days. I didn't use it for about a month, after which it refuses to turn on. So I'm GUESSING it's the power supply. probably bad caps in either PSU or on the mobo. A component tester could probably tell you their ESR. NT |
#3
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Gateway 1995 P5 power supply specs
They are standardized but Gateway doesn't use a standard one usually.
I agree on the caps. Companies like Gateway skimp on the power and make the power supply smaller.. Nothing else will fit. They will usually work but they would have to be outside the case. And some of them use the power supply fan to cool the microprocessor. That really stickies up the wicket. The only thing you can't get usually is the transformer. But be careful if you have to replace the main chopper. Generally it will be a MOSFET and the ratings not really all that critical, but you need at least like a 700 volt part because they use a line doubler for 110 volts and simply turn it into a regular rectifier for 220 volt operation. |
#4
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Gateway 1995 P5 power supply specs
Much obliged to all
- = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus blog: panix.com/~vjp2/ruminatn.htm - = - web: panix.com/~vjp2/vasos.htm facebook.com/vasjpan2 - linkedin.com/in/vasjpan02 - biostrategist.com ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- |
#5
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Gateway 1995 P5 power supply specs
Quickest way to see if it is AT or ATX is that the AT type has a hard power switch, that is it actually turns off the AC going to the power supply. The ATX type has a soft power switch which connects to the motherboard.
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#6
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Gateway 1995 P5 power supply specs
Funny outcome:
mention of capacitors made me think, "What if I leave it on a long time?" Indeed, After like six hours, it turned on (the GW2k P5). I'm using it now to dialup to unix Now, I'm afraid to shut it off. What cause dit to "die" in the first place was I hadn't used it in a long while - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus blog: panix.com/~vjp2/ruminatn.htm - = - web: panix.com/~vjp2/vasos.htm facebook.com/vasjpan2 - linkedin.com/in/vasjpan02 - biostrategist.com ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- |
#7
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Gateway 1995 P5 power supply specs
On Sunday, December 3, 2017 at 9:06:13 PM UTC-8, wrote:
Funny outcome: mention of capacitors made me think, "What if I leave it on a long time?" Indeed, After like six hours, it turned on (the GW2k P5). I'm using it now to dialup to unix Now, I'm afraid to shut it off. What cause dit to "die" in the first place was I hadn't used it in a long while Yes, one sees this a lot on the (Apple II type) early switchmode supplies. The startup sequencing is critically dependent on some part of the (presumably) capacitor impedance, and good but stale-on-the-shelf capacitors make the startup fail. You just hear tick...tick... I've tried replacing the big output filter capacitors (usual culprits for high-ESR failure mode) with no success, it's presumably NOT those, but one of the 'minor' parts. And, in at least three cases, let it tick overnight, and the next morning it's working. Will work for years. Use and enjoy. |
#8
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Gateway 1995 P5 power supply specs
I don't want to jinx myself,
but it turns on every day since I left it on for a few hours (and it finally revived) on Sunday. - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus blog: panix.com/~vjp2/ruminatn.htm - = - web: panix.com/~vjp2/vasos.htm facebook.com/vasjpan2 - linkedin.com/in/vasjpan02 - biostrategist.com ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- |
#9
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Gateway 1995 P5 power supply specs
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#10
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Gateway 1995 P5 power supply specs
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