UK Vintage Radio Repair and Restoration Discussion Forum

UK Vintage Radio Repair and Restoration Discussion Forum (https://www.vintage-radio.net/forum/index.php)
-   Vintage Television and Video (https://www.vintage-radio.net/forum/forumdisplay.php?f=37)
-   -   National NV-7500EM VCR very strange problem (https://www.vintage-radio.net/forum/showthread.php?t=120614)

dj_fivos_sak 26th Oct 2015 7:46 am

National NV-7500EM VCR very strange problem
 
I have a very strange problem with this early Panasonic machine. When the machine is in stop mode, even without a tape inside, the machine displays signal (snow) from the actual video heads! I cannot get E-E signals through the vcr neither from line in or tuner. This happened suddenly while I was using the machine regularly and I don't know what caused this! When I press play, I can see the head drum spinning up right on the telly and the picture comes up distorted! What I mean is that, normally when you press play, you have to wait for the tape to load and then after a couple of seconds, the picture comes up. In my case, the picture from the heads is constantly there. I will post a video on YouTube soon to explain it better.

dj_fivos_sak 26th Oct 2015 9:25 am

Re: National NV-7500EM VCR very strange problem
 
https://www.youtube.com/watch?v=DoCSqAy11rY

Here's the video.

8 Tracker 26th Oct 2015 11:35 am

Re: National NV-7500EM VCR very strange problem
 
Just a thought, some machines had a relay to switch between E-E and off-head signals. Could this be stuck or receiving a constant signal?
Mark.

Nickthedentist 26th Oct 2015 3:14 pm

Re: National NV-7500EM VCR very strange problem
 
Have you got the manual? The signal path will no doubt be quite clearly marked, and you should be able to work out what's going wrong and where.

dj_fivos_sak 26th Oct 2015 11:03 pm

Re: National NV-7500EM VCR very strange problem
 
I have the manual for the NV-7200 and 7800 models. Mine is multi system.


All times are GMT +1. The time now is 1:17 am.

Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright ©2002 - 2020, Paul Stenning.