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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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Mitsubishi VS50VA2 rolls for the first minute after turn on.
This is the description I got from the customer over the phone. It
sounds like it could be a high ESR cap but I don't know. Does anyone know of a definite cause for this symptom on this model? I would like to try to have as much information on this before I attempt an in home repair. Thanks for any advice. Lenny Stein, Barlen Electronics. |
#2
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Mitsubishi VS50VA2 rolls for the first minute after turn on.
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#3
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Mitsubishi VS50VA2 rolls for the first minute after turn on.
This symptom is typical of the infamous PIP module with the leaky
electrolytics. If the corrosion has not become so bad that the board is unrepairable, you can change all of the surface mount caps and clean up the corrosion. If the traces are eaten up or the black corrosion has reached the IC, don't bother. Just bypass it. The details of the bypass and repairs of the PIP modules can be found in the archives of this group and on the NESDA-Ohio organization site. There have also been some sets in this chassis series with problems on the 9 and 12 volt lines. Check the caps on those lines. Leonard wrote in message oups.com... This is the description I got from the customer over the phone. It sounds like it could be a high ESR cap but I don't know. Does anyone know of a definite cause for this symptom on this model? I would like to try to have as much information on this before I attempt an in home repair. Thanks for any advice. Lenny Stein, Barlen Electronics. |
#5
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Mitsubishi VS50VA2 rolls for the first minute after turn on.
I've done a few PIP bypasses on 27" sets. Is the board used in these
projections and the procedure for bypass the same as the 27's? Lenny |
#6
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Mitsubishi VS50VA2 rolls for the first minute after turn on.
Yes. Essentially the same. I think the connectors might be lablelled
differently, but we use the same bypass technique. Note that only a few models of the RPTVs used these. A lot more of the direct view sets did. Leonard wrote in message ups.com... I've done a few PIP bypasses on 27" sets. Is the board used in these projections and the procedure for bypass the same as the 27's? Lenny |
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