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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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philips pm 3305 oscilloscope question
Hi I have this scope and all power outputs half volts low than its
originally should.After checking all components i found that transformer windings is shorted.do you know any companies who can re-wind the transformer.Prefer companies in california.Thanks |
#2
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philips pm 3305 oscilloscope question
max wrote:
Hi I have this scope and all power outputs half volts low than its originally should.After checking all components i found that transformer windings is shorted.do you know any companies who can re-wind the transformer.Prefer companies in california.Thanks http://www.jacksonengineering.com/ http://www.mercurymagnetics.com |
#3
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philips pm 3305 oscilloscope question
On Mar 11, 12:08*pm, max wrote:
Hi I have this scope and all power outputs half volts low than its originally should.After checking all components i found that transformer * * * windings is shorted.do you know any companies who can re-wind the transformer.Prefer companies in california.Thanks Check the external wiring carefully: remember, the oscilloscope is a vacuum tube device, it has high voltage windings and odd requirements for HV isolation of some of the windings. If you don't have a LOT of data, rewinding it could be a disappointment. Usually, a shorted winding gets hot; if it's really 'half volts' that is the issue, look for a 110/220V selection switch. |
#4
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philips pm 3305 oscilloscope question
whit3rd wrote:
On Mar 11, 12:08 pm, max wrote: Hi I have this scope and all power outputs half volts low than its originally should.After checking all components i found that transformer windings is shorted.do you know any companies who can re-wind the transformer.Prefer companies in california.Thanks Check the external wiring carefully: remember, the oscilloscope is a vacuum tube device, it has high voltage windings and odd requirements for HV isolation of some of the windings. If you don't have a LOT of data, rewinding it could be a disappointment. Usually, a shorted winding gets hot; if it's really 'half volts' that is the issue, look for a 110/220V selection switch. switch is ok because input 30v ac is fine. the transformer provide the high voltage and I think this transformer is bad.Not always if the windings shorted transformer can be hot.I disconnect the output power completely from logic and other boards of scope.Still the same problem.Check all components in power supply circuits.They all fine.Replaced some caps with losing value and resistance ESR.Still problem exist.Hearing hard whistle from switching transformer.Thanks |
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