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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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Paradigm PS-800, woofer, will not power up
"obob@" wrote in message ... My Paradigm PS-800 woofer has auto-on. Stopped working. Fuse is ok with ohm meter. Any suggestions as to repair? Have you checked the voltage output of the standby power supply? If it's dead, check the impedance of the transformer primary, could have opened up. |
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On Sun, 13 Feb 2005 07:25:33 GMT, "obob@" wrote:
My Paradigm PS-800 woofer has auto-on. Stopped working. Fuse is ok with ohm meter. Any suggestions as to repair? Unless things have changed in the last 2 years, the woofer will have to be taken to a Paradigm dealer because Paradigm didn't sell parts or service manuals for these. The electronics had to be shipped to upstate N.Y. where a technician from Ontario would repair them and ship them back to the store. Chuck |
#3
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Things have not changed. I tried to service one a few months ago and
was told that the customer had to take it to an authorized dealer. I had already tracked the problem down and only needed to know the value of a resistor. Doug |
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"Chuck" wrote in message ... On Sun, 13 Feb 2005 07:25:33 GMT, "obob@" wrote: My Paradigm PS-800 woofer has auto-on. Stopped working. Fuse is ok with ohm meter. Any suggestions as to repair? Unless things have changed in the last 2 years, the woofer will have to be taken to a Paradigm dealer because Paradigm didn't sell parts or service manuals for these. The electronics had to be shipped to upstate N.Y. where a technician from Ontario would repair them and ship them back to the store. Chuck Just because a service manual can't be bought doesn't mean it can't be fixed. I've almost never used service manuals and only once or twice ordered parts from a manufacture. |
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"Doug" wrote in message ups.com... Things have not changed. I tried to service one a few months ago and was told that the customer had to take it to an authorized dealer. I had already tracked the problem down and only needed to know the value of a resistor. Doug Is it burned beyond recognition? Did you find out what shorted and caused it to burn? Shouldn't be too hard to find someone with a good unit to check the resistor, or if you can tell where it's used in the circuit you could make an educated guess. |
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"Doug" wrote in message ups.com... Things have not changed. I tried to service one a few months ago and was told that the customer had to take it to an authorized dealer. I had already tracked the problem down and only needed to know the value of a resistor. Did you try a pot to see if you could make it work? -- N |
#7
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Thanks for the suggestion.
No, couldn't try a pot. There were two damaged resistors in series with the primary of the power transformer. The fuse had blown but there were no shorted semiconductors or caps. Due to the issues of safety and reliability, I wanted to repair the unit to factory specs. Especially with subwoofers being left powered up on standby all the time. Another side of the issue is that we guarantee our repairs. If we repair a unit we need to know we can get parts to fix it if it comes back with another problem. |
#8
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"Doug" wrote in message oups.com... Thanks for the suggestion. No, couldn't try a pot. There were two damaged resistors in series with the primary of the power transformer. Were they used as fuses or to drop the volts to the transformer? -- N |
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Probably to drop the voltage. I've never encountered that scheme
before. They had obviously overheated, I could't be sure of the colors, and didn't trust a resistance measurement. They were in series with the primary, one on each leg. They didn't look like they'd handle enough current for the product, though. I'm pretty sure they weren't used as fuses because there was a regular glass fuse. The unit was a Paradigm PS1200. I emailed the manufacturer's support and was told, no parts or information ...must be taken to an authorized dealer for return.... So I emailed to get the details for my customer, and they responded that HE must take it himself. Furthermore, they attached a copyright notice to their email. I wasn't even allowed to forward it to prove how uncooperative they were! So, I put it back as it was, no repair. Now Paradigm is another of the product lines we no longer accept for service. Sorry for the rant. Thanks for your reply and interest in my problem. Doug |
#10
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"Doug" wrote in message oups.com... Probably to drop the voltage. I've never encountered that scheme before. It makes for a cheaper transformer, but it has risks (obviously). They had obviously overheated, I could't be sure of the colors, and didn't trust a resistance measurement. They were in series with the primary, one on each leg. They didn't look like they'd handle enough current for the product, though. I'm pretty sure they weren't used as fuses because there was a regular glass fuse. The unit was a Paradigm PS1200. I emailed the manufacturer's support and was told, no parts or information ...must be taken to an authorized dealer for return.... So I emailed to get the details for my customer, and they responded that HE must take it himself. Furthermore, they attached a copyright notice to their email. I wasn't even allowed to forward it to prove how uncooperative they were! Can you post it on the Wall of Shame in your shop! So, I put it back as it was, no repair. Now Paradigm is another of the product lines we no longer accept for service. Sorry for the rant. Thanks for your reply and interest in my problem. Doug |
#11
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Thanks for the reply.
We try to keep everything positive. Therefore, no Wall of Shame. We do, however, have a list of brands we cannot service hanging behind our counter. We want to provide good service at a fair price, but some manufacturers treat us like an enemy. Some others don't value customer satisfaction and don't have a parts department. I guess it keeps costs down. We provide warranty service for some prestigious and well respected brands, and their support is first-rate. Doug |
#12
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On Wed, 16 Feb 2005 03:13:22 GMT, "obob@" wrote:
Seems llike things haven't changed. I phoned the paradigm dealer, who gave me paradigms support email addy. Emailed the addy, and the reply ' take it to the dealer.. No user servicable parts.'. Immediately I replied a queery, asking for Paradigms repair depot address, in order that I could ship the unit there. Got no reply. On Mon, 14 Feb 2005 14:41:34 GMT, Chuck wrote: On Sun, 13 Feb 2005 07:25:33 GMT, "obob@" wrote: My Paradigm PS-800 woofer has auto-on. Stopped working. Fuse is ok with ohm meter. Any suggestions as to repair? Unless things have changed in the last 2 years, the woofer will have to be taken to a Paradigm dealer because Paradigm didn't sell parts or service manuals for these. The electronics had to be shipped to upstate N.Y. where a technician from Ontario would repair them and ship them back to the store. Chuck Paradigms are phenominal speakers for the money but they are extremely protective of their distribution chain and replacement parts. When I did warranty work for them, we had to send the serial numbers of the speakers we were replacing the blown drivers in because they were afraid someone would use their drivers in homebuilt enclosures. Chuck |
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