Quote:
Originally Posted by JCFitz
If none of the suggestions work you may have a unit with a bad drum motor ic mounted where else on the drum motor as part of it. It loses one of the feedback pulses needed for proper servo alignment. Was a common problem on JVC vcrs of the 90s. The drum motor has to be replaced to fix it.
|
Actually on a lot of those JVCs you can simply replace the 3.3 uFd/35V (as I recall) SMD electrolytic capacitor that fails on the drum stator board. You can usually get to it from the bottom but sometimes you have to lift out the cylinder assy. I've fixed many like that. It loses the PG pulse when that cap fails which is how the servo knows where the head cylinder is, causing the head-switching to be anywhere rather than being locked to the position of the cylinder and heads, and you get the blue screen just like no video or clogged heads.