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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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I have an old big screen Pioneer I have had for years. To get it started
now I have plug and unplug it over and over in the wall till it finally starts. the longer I go without watching it the longer I have to plug and unplug it. Sometimes I have to do it for ten minutes to get it working sometimes just a minute. Almost always related to how long ago the last time I watched it. What's wrong with it? Can I fix it myself? IF I am lucky enough to find an honest person to fix it about how much is it going to cost. It still gets a decent picture but it's not my main or even second TV . Help please? -- Bunboy The people who can smile when things go wrong have found someone else to blame |
#2
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If you are skilled in TV servicing, and have the necessary tools and
service information to troubleshoot the set, you can service it. This sounds like a component in either the power supply, HV generator, a scan amplifier, scan protection, or etc is becoming thermo sensitive. Many times electrolytic caps can do this type of failure in various areas. There is probably a number of them that have to be changed, when considering that the set has a number of years on it. If you keep using the set this way, the defective component(s) may infact become completely shorted or opened, thus causing other damage. This will greatly increase the cost of repairs. To make it work successfully again, I would suggest you call in an experienced service person who knows your set very well. There are very high voltages employed, and there are very strong safety issues at stake. -- Greetings, Jerry Greenberg GLG Technologies GLG ============================================== WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm Instruments http://www.zoom-one.com/glgtech.htm ============================================== "bunboy" wrote in message news:m3x5b.43856$Qy4.35329@fed1read05... I have an old big screen Pioneer I have had for years. To get it started now I have plug and unplug it over and over in the wall till it finally starts. the longer I go without watching it the longer I have to plug and unplug it. Sometimes I have to do it for ten minutes to get it working sometimes just a minute. Almost always related to how long ago the last time I watched it. What's wrong with it? Can I fix it myself? IF I am lucky enough to find an honest person to fix it about how much is it going to cost. It still gets a decent picture but it's not my main or even second TV . Help please? -- Bunboy The people who can smile when things go wrong have found someone else to blame |
#4
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Thanks for the input. I'll try the electroyltics in the IF section, I have
a good cap tester. Kurtis "David" wrote in message ... The convergence failure needs repaired, probably failing capacitors in the convergence circuit or the convergence output ic failing. The tuning problem is also likely bad capacitors. One particular run on Pioneer sets had two little electrolytic capacitors in the IF can that would go bad and look like a bad tuner. David wrote in message ... I have an additional question. I also have an older 401 Pioneer RPTV. About 5 years ago I replaced all the P.S. Electroyltics with new high temp switching power supply caps and reflowed the solder at any points that look like were potential cold solder joints. My unit powers on fine. My issue is the the tuner started working intermittently and now does not work at all. I have the service manual and have not started looking yet. I was actually first going to look for bad caps. Is this a common issue to look at, if not I'll just start looking at the tuner voltages. The video inputs work fine. Also for years the reds are slightly bending to the left on the right lower quadrant. This has not been enough for me to tear into the unit. This cannot be corrected by adjusting the convergence pots on the front board and I also repaired all cold solder joints on that board. Has anyone ran into this issue? Thanks in advance for any help Kurtis "Jerry G." wrote in message ... If you are skilled in TV servicing, and have the necessary tools and service information to troubleshoot the set, you can service it. This sounds like a component in either the power supply, HV generator, a sc an amplifier, scan protection, or etc is becoming thermo sensitive. Many times electrolytic caps can do this type of failure in various areas. There is probably a number of them that have to be changed, when considering that the set has a number of years on it. If you keep using the set this way, the defective component(s) may infact become completely shorted or opened, thus causing other damage. This will greatly increase the cost of repairs. To make it work successfully again, I would suggest you call in an experienced service person who knows your set very well. There are very high voltages employed, and there are very strong safety issues at stake. -- Greetings, Jerry Greenberg GLG Technologies GLG ============================================== WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm Instruments http://www.zoom-one.com/glgtech.htm ============================================== "bunboy" wrote in message news:m3x5b.43856$Qy4.35329@fed1read05... I have an old big screen Pioneer I have had for years. To get it started now I have plug and unplug it over and over in the wall till it finally starts. the longer I go without watching it the longer I have to plug and unplug it. Sometimes I have to do it for ten minutes to get it working sometimes just a minute. Almost always related to how long ago the last time I watched it. What's wrong with it? Can I fix it myself? IF I am lucky enough to find an honest person to fix it about how much is it going to cost. It still gets a decent picture but it's not my main or even second TV . Help please? -- Bunboy The people who can smile when things go wrong have found someone else to blame |
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