Question about JVC HM-DH30000U DVHS VCR
When I rewind a tape the VCR does the rewind OK but then looses it's settings (clock and so forth) and turns itself off. Visible rewind does not do this. Is there an EEPROM reset of some sort or may it be something else?
In my opinion, tape end sensor sounds defective or got blind for some reason that is why it does not detect end part of tape which is transparent to send center IR LED light towards end sensor. Check end sensor should be clean, or replace it to fix problem.
VCR turns off due to rewind error as tape reaches an end but motor still powering the gears because system control chip does not receive end sensor signal about tape end to stop motor, so it is an error and vcr shuts down.
VHS cassette (or any other recording cassette) has small transparent tape part at start and end of entire recording tape to provide IR LED light towards either start or end sensor.
IR LED is located right in center of cassette compartment.
Below image shows IR LED, start and end sensor locations, it is just an example to have an idea.
Let me know if you have additional question.
Posted on Feb 03, 2010
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Posted on Jan 02, 2017
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