I have one in my collection, and get it for about 10 years ago on the recycling station, i used it a lot and then put it on stock, now it's time to play with it again, it plays very great and have a fine picture and sound, but when i record something the sound is missing i both channels, if i turn the volume to max on the vcr it register some distorted sound and the VU metres is moving, does anyone have an idea what the issues is?
is there anyone who had experience with those machines? i would like to hear further 🙂
Never worked on or sold them Alex, I used a UMatic machine on a training course nearly 40 years ago but that is about it.
If the audio is recorded like many VCR machines on its own analog track then check the bias oscillator.
Put a finger or screwdriver on to the terminals of the audio/control head, if you hear sound then there may be an tape alignment (unlikely) or threading issue (more likely if the machine has not been used) if there is no sound then it's an audio signal path issue. I'm not familiar with this model but most have a variety of balanced and unbalanced outputs on various connectors XLR,phono and EIAJ. It's worth checking them all, also the 600Ω term switch if fitted, these would give audio problems on the Betacam decks.
in playmode there is fine sound, the issues is only in record mode, im sure that the bias oscillatoer is running, but why no clear sound is on the tape? i want to check it out in the weekend 🙂
The bias oscillator will be used for record only that’s why I suggested it. One fault if the bias osc is not running is low distorted sound on recordings but ok on playback of good tapes, but if it’s running that’s ok.
If you have a scope trace audio path on record, hopefully you have a circuit to help trace it through.
It's worth checking them all, also the 600Ω term switch if fitted, these would give audio problems on the Betacam decks.
I'd hope nobody in this day and age is still using those termination switches...