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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 CM803ET 21" monitor - vert collapse
For about 6 months the monitor suffered from vert collapse which could
be cured with a swift smack on the case, then it gave up, just a single horizontal line. I took the cover off & found that tapping the LA7838 heatsink would cause the bottom 1" of the picture to 'hang' from the line. At this point I sent the monitor off to the local TV guy for repair. He phoned me a couple of days later saying the field output transformer had gone, taking with it a couple of ic's and a bunch of caps, and would cost about £200 to repair - which I declined. (A replacement can be bought for not much more) I now have it opened up on the bench and see the LA7838 has been resoldered. Any ideas tia Mike (spamtrap - remove my footwear to reply) |
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"Mike" wrote in message ... For about 6 months the monitor suffered from vert collapse which could be cured with a swift smack on the case, then it gave up, just a single horizontal line. I took the cover off & found that tapping the LA7838 heatsink would cause the bottom 1" of the picture to 'hang' from the line. At this point I sent the monitor off to the local TV guy for repair. He phoned me a couple of days later saying the field output transformer had gone, taking with it a couple of ic's and a bunch of caps, and would cost about £200 to repair - which I declined. (A replacement can be bought for not much more) I now have it opened up on the bench and see the LA7838 has been resoldered. Any ideas tia Mike (spamtrap - remove my footwear to reply) Hard to say at this point, if you had taken it in for repair when it first started acting up it probably would have been about 1/4 what it costs now to have fixed. |
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