I know, these dinosaurs should become gasoline, but still curious on how to fix this.
I have a cheapo, probably not-worth-to-fix Funai mechanism (Magnavox MWD2206) VCR-DVD combo. When I play back prerecorded VHS tapes, the top ~ 7/8 of the screen looks fine, but the bottom 1/8 is messed up. The bottom 1/8 has no color, and looks like 2/3 of that 1/8 is streaking the bottom most line that does have color (luminance only, no chroma, so it looks like bars) and the bottom most 1/3 looks like it's showing the right luminance for the remainder of the frame, but very noisy and once again no chroma.)
Other than this it seems to play back almost fine though it occasionally tracks funny.
Recording seems to work but playing back its own recordings show this same behavior, and playing in other VCRs "works" if it has auto tracking but if you cue/review during play, it's completely messed up.
I think that for some reason the sync timing is off between the head motor and capstan, but wonder if anyone has seen something like this before?
Unfortunately the head position sensor is fixed so I can't play with the position of it, at least I don't think I can... It uses a soldered PCB that contains the distribution for the BLDC motor and the detector does not appear to have slide holes - and detects the poles of the BLDC moving magnets much like brushless fans...
I have a cheapo, probably not-worth-to-fix Funai mechanism (Magnavox MWD2206) VCR-DVD combo. When I play back prerecorded VHS tapes, the top ~ 7/8 of the screen looks fine, but the bottom 1/8 is messed up. The bottom 1/8 has no color, and looks like 2/3 of that 1/8 is streaking the bottom most line that does have color (luminance only, no chroma, so it looks like bars) and the bottom most 1/3 looks like it's showing the right luminance for the remainder of the frame, but very noisy and once again no chroma.)
Other than this it seems to play back almost fine though it occasionally tracks funny.
Recording seems to work but playing back its own recordings show this same behavior, and playing in other VCRs "works" if it has auto tracking but if you cue/review during play, it's completely messed up.
I think that for some reason the sync timing is off between the head motor and capstan, but wonder if anyone has seen something like this before?
Unfortunately the head position sensor is fixed so I can't play with the position of it, at least I don't think I can... It uses a soldered PCB that contains the distribution for the BLDC motor and the detector does not appear to have slide holes - and detects the poles of the BLDC moving magnets much like brushless fans...
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