Quantcast No image on JVC HM-DH3000U when playing D-theatre? - digitalFAQ Forum
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  #1  
11-28-2020, 10:09 AM
ho3298 ho3298 is offline
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I acquired a JVC HM-DH3000U today. It played VHS tapes smoothly. But when it played D-theatre movie tape, there was no image and sound (maybe black and distorted image sometimes). Even though I tried forwarding or rewinding the tape, as well as cleaning the head, no image or sound showed up.

Is it the problem of the tape or the machine itself?
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  #2  
11-28-2020, 11:27 AM
latreche34 latreche34 is offline
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Check the user manual, D-Theater may not be available via SD outputs or may not play D-theater tapes at all, Are you using HD component?

Edit: You model does not appear to playback D-Theater movies according to this page:
https://www.us.jvc.com/archive/video/digitalvhsvcrs/

Last edited by latreche34; 11-28-2020 at 11:42 AM.
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  #3  
11-28-2020, 12:28 PM
ho3298 ho3298 is offline
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I did use the HD component. But it just doesn't play the tape. The screen remains black when playing the tape.
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  #4  
11-28-2020, 05:08 PM
latreche34 latreche34 is offline
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Quote:
Originally Posted by ho3298 View Post
I did use the HD component. But it just doesn't play the tape. The screen remains black when playing the tape.
As I said above, your model does not have D-Theater feature, It can only playback D-VHS tapes recorded from an ATSC tuner programs. It can however playback high bitrate D-VHS tapes recorded using D-VHS tool thru firewire and the file has to be prepared in PC using a specific script.
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  #5  
11-28-2020, 08:06 PM
ho3298 ho3298 is offline
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Well, latreche34, I think you should double-check the specs of my HM-DH30000U. The website which you provide says my machine supports "D-Theater compliant with the advanced D-VHS security system".

Can you please give me other useful advice, especially after reading the specs and user manual of my machine?
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  #6  
11-28-2020, 08:19 PM
latreche34 latreche34 is offline
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Which page of the manual talks about D-Theater? I can't find it, But JVC is listing it as 30000 not 3000 maybe that's the difference although I don't think 3000 ever existed.
If your VCR has the D-Theater logo on the front panel it could be an electronic malfunction, possible leaky caps in the power supply that powers up the D-Theater decoding chip.

Last edited by latreche34; 11-28-2020 at 08:39 PM.
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  #7  
11-28-2020, 08:43 PM
ho3298 ho3298 is offline
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May I ask which caps in the power supply I should replace?

Maybe I should have them replaced whether they are leaky or not just to be safe.
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  #8  
11-28-2020, 09:00 PM
latreche34 latreche34 is offline
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I don't know, You need a service manual and some test equipment and follow the test procedures. You can still take it a part and look around the power section and check for any leaks or bad smell, Though caps can fail without leaking or smelling.
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  #9  
11-30-2020, 07:17 AM
ho3298 ho3298 is offline
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I managed to capture a few photos of the distorted image when playing a d-theater tape. Can anyone please tell me whether this is the problem of the tape or the circuit board or something else?


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File Type: jpg IMG_20201130_195122.jpg (168.0 KB, 3 downloads)
File Type: jpg IMG_20201130_195117.jpg (145.5 KB, 3 downloads)
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  #10  
11-30-2020, 02:00 PM
latreche34 latreche34 is offline
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AVS forum have a lot of members who own D-VHS decks and threads about this issue.
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