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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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Mystery component. What is a PR?
I've got a Denon UD-M5 mini hi-fi CD changer unit with a blown
internal power supply. The faulty component appears to be a device that looks like a small resistor and is labelled on the board as 'PC003'. The device itself is marked '315'. I'm guessing it's some sort of fusable link as it feeds raw DC to the input leg of a 6V voltage regulator but am a bit puzzled as I haven't encountered one before. Can anyone tell me what this device is? Thanks. Nigel. |
#2
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Mystery component. What is a PR?
You got it. I just became aware of these in the last year or two when I
blew out two of them in a computer subwoofer/amp module. I was trying to measure the aux voltage output on the back. I kept getting spurious voltage readings all over the boards...then I noticed these two 'resistors' in the +/- supply lines. In my case, it was clearly marked on the board what they were; the 'disconnect' in my brain of seeing 'resistors' and reading fuse ratings threw me off for a bit. I'm sure there's some color code for them. Somebody will surely chime in with it. Beware they are not cheap; at least compared to conventional resistors or conventional fuses. Live & learn.... jak "Nigel Wilson" wrote in message om... I've got a Denon UD-M5 mini hi-fi CD changer unit with a blown internal power supply. The faulty component appears to be a device that looks like a small resistor and is labelled on the board as 'PC003'. The device itself is marked '315'. I'm guessing it's some sort of fusable link as it feeds raw DC to the input leg of a 6V voltage regulator but am a bit puzzled as I haven't encountered one before. Can anyone tell me what this device is? Thanks. Nigel. |
#3
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Mystery component. What is a PR?
Thanks for confirming my suspicions. Have you any idea of the proper
name for these devices as I'm having problems looking them up in my catalogues? Thanks. Nigel. "jakdedert" wrote: I kept getting spurious voltage readings all over the boards...then I noticed these two 'resistors' in the +/- supply lines. |
#4
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Mystery component. What is a PR?
On 1 Jan 2004 05:36:44 -0800, Nigel Wilson hath writ:
Thanks for confirming my suspicions. Have you any idea of the proper name for these devices as I'm having problems looking them up in my catalogues? PR = Phusible Resistor ? g snicker -- snort -- snerggle HNY Jonesy -- | Marvin L Jones | jonz | W3DHJ | OS/2 | Gunnison, Colorado | @ | Jonesy | linux __ | 7,703' -- 2,345m | config.com | DM68mn SK |
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