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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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K-deck Panasonic VCR NV-HD620
I replaced a worn roller on this deck and experienced some problems to get
the timing right. I re-aligned the lot and all works fine now beside the auto rewind stop. On a rewind the tape will go in slow motion when approaching the end but then keeps on rewinding right across the clear milar section. The result is a mechanical jam followed by a inload/load and initiating the rewind again; this will continue for ever (till the tape snaps). I guess tape end is sensed through an optical cell mounted on the erase head pillar. I checked al connection and cleaned everything. Of course I am aware of the extreme day-light sensitivity of this deck; the problem is also there with the casing closed. No fault codes are produced. Anyone aware of this kind of problems on K-decks, I would appreciate any tips on how to determine what is wrong. Erik |
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K-deck Panasonic VCR NV-HD620
Erik Creyghton:
The "end of tape" sensor is not on the erase head pillar but instead it is to the left of the carriage. Likewise, the "beginning of tape" sensor is located to the right of the carriage. Both of these sensors depend on the center IR LED working properly. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Erik Creyghton" wrote in message ... I replaced a worn roller on this deck and experienced some problems to get the timing right. I re-aligned the lot and all works fine now beside the auto rewind stop. On a rewind the tape will go in slow motion when approaching the end but then keeps on rewinding right across the clear milar section. The result is a mechanical jam followed by a inload/load and initiating the rewind again; this will continue for ever (till the tape snaps). I guess tape end is sensed through an optical cell mounted on the erase head pillar. I checked al connection and cleaned everything. Of course I am aware of the extreme day-light sensitivity of this deck; the problem is also there with the casing closed. No fault codes are produced. Anyone aware of this kind of problems on K-decks, I would appreciate any tips on how to determine what is wrong. Erik |
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