Panasonic NV-HS1000 random horizontal black lines?

[sagabeat]

Hello to all friends.
I have a panasonic NV-HS1000 pal machine that is in great shape but i have this problem during playback.
I see black horizontal lines during playback. in the newer cassetes i have this problem minor. 1 - 2 lines per 5 or 10 minutes. In old worn tapes i have this problem major 5 or 10 black lines per minute.

I play the same cassetes in my second vcr (Jvc Hr-5960 svhs) and no black lines. its play just fine.

Please see the attach files an tell me if have seen something like this.

[aramkolt]

They appear to just be line dropouts to me. Different VCRs are better at masking them than others. The way to know for sure that it is the tape and not the machine is to capture the same section twice and if you get those lines in the exact same places and frames, then it's the tape. You might find a different VCR makes them less noticeable though.

[sagabeat]

i make an experiment and capture entire the same tape 3 times from start to end. The line dropouts it was in the exact same places and same frames in all 3 captures. Some ultra minor drop lines missing in the second or third capture. I guess so this is because the tape goes from start to end and rewind 3 times. But if i play and capture the same tape with my JVC HR-S5960 i no get this lines dropouts. The Panasonic NV-HS1000 make a weird loud noise when rewind the tape 10-15 seconds before the tape reaches the beginning. I'm starting to think its a tape path alignment problem

[aramkolt]

I still think if the dropouts are in the exact same places on multiple playbacks and only visible one of the machines, it really can't be an alignment problem since it's repeatable and only on certain frames. Alignment issues usually will affect a large portion of the frame and be slightly random as the "auto tracking" tries to hunt for a stable signal. The rest of your picture outside of the single lines is clear which should not be the case for alignment problems.

If you really want to know if it is just a difference in how the NV-HS1000 handles dropouts vs something just being wrong with the dropout compensation circuit, you'd have to try the same tape with a second machine of the same model. If that second machine has the exact same issue, then that's likely just how the HV-HS1000 was meant to handle dropouts and there is nothing wrong with either machine.

Transports can be noisy during FF/Rew, but that doesn't need to affect playback bility. I'd say since the rest of the image is clear, it really shouldn't be an alignment problem, especially if the HiFi audio is also working as that also requires alignment to be correct.