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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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hitachi 51SWX20B intermittent minor convergence pulling apart.
Knocking on STK392-110 no result, but knocking on the metal can box
for convergence generator makes little noise lines in the picture, also bit different results if I knock around on the signal mainboard. Is there any known issues with 51SWX20B convergence problems? While ago we had to replace that convergence generator box on a older Hitachi. This convergence generator box is located under the CRTs in middle on the "floor" of cabinet for very intermittent extreme pulling apart at tune of 400 for this tiny box, replacing caps did not repair this. Cheers, Wizard |
#2
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hitachi 51SWX20B intermittent minor convergence pulling apart.
Jason: Happy Thanksgiving!!
Check for poor solder connections at the inter board connectors, common problem. Also the DCU, the item within the metal box tyo are tappin on has a plugin connector where it plugs into the main board. Possible bad connections there or an actual problem inthe DCU itself. The interboard cpnnectors have been a concern, those form the main signal to the deflection and those from the deflection onto the convergence power amp board. They are a pain to access, requiring removal of the pc boards and a good mag glass. "Jason D." wrote in message ... Knocking on STK392-110 no result, but knocking on the metal can box for convergence generator makes little noise lines in the picture, also bit different results if I knock around on the signal mainboard. Is there any known issues with 51SWX20B convergence problems? While ago we had to replace that convergence generator box on a older Hitachi. This convergence generator box is located under the CRTs in middle on the "floor" of cabinet for very intermittent extreme pulling apart at tune of 400 for this tiny box, replacing caps did not repair this. Cheers, Wizard |
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