| View previous topic :: View next topic |
| Author |
Message |
TGM
Joined: 04 Jun 2023
Posts: 28
|
 Posted: Fri Jan 26, 2024 11:06 pm Post subject: SJT-100 No Video Issue |
 |
|
So, I was modding my system for AV output, then after re-soldering a new cable, the color started popping in and out. Similar to a slightly dragging turntable. It continued for a few seconds, then the picture cut out entirely on both RF and my composite mod.
I tested on an oscilloscope and confirmed there wasn't a usable picture, but I've found a difference when the player was on. (I only got the scope today, so it may have been set up wrong, but don't think it is)
Video of this: https://youtu.be/oB9wPpB6IGo
Has anyone had this issue before? And does anyone know what I can look at to diagnose it?
_________________
Glitchy Mario
SJT-100 (not working  )
Sears 934.54780150/CED-1 Frankenstein |
|
| Back to top |
|
 |
ketonic_dude
Joined: 20 Jul 2012
Posts: 547
Location: Mankato, MN
|
|
| Back to top |
|
|
TGM
Joined: 04 Jun 2023
Posts: 28
|
| Posted: Mon Jan 29, 2024 6:17 am Post subject: |
|
|
Unfortunately, the listing ended because it was lost or broken, so I cant buy it.
_________________
Glitchy Mario
SJT-100 (not working )
Sears 934.54780150/CED-1 Frankenstein |
|
| Back to top |
|
|
ketonic_dude
Joined: 20 Jul 2012
Posts: 547
Location: Mankato, MN
|
| Posted: Mon Jan 29, 2024 9:30 am Post subject: |
|
|
| I would message the seller. I purchased one and they emailed me afterwords saying they had many in stock if I wished to place a bulk order. I'd be very surprised if they are sold out. |
|
| Back to top |
|
|
TGM
Joined: 04 Jun 2023
Posts: 28
|
| Posted: Tue Jan 30, 2024 9:07 am Post subject: |
|
|
| ketonic_dude wrote: | | I would message the seller. I purchased one and they emailed me afterwords saying they had many in stock if I wished to place a bulk order. I'd be very surprised if they are sold out. |
I probably will. I will check if there is input and output on that chip though first, but I think you’re right. Looking at the video again, the jump in the oscilloscope likely shows that the amp circuit is working, and is just amplifying nothing.
_________________
Glitchy Mario
SJT-100 (not working )
Sears 934.54780150/CED-1 Frankenstein |
|
| Back to top |
|
|
TGM
Joined: 04 Jun 2023
Posts: 28
|
| Posted: Sat Mar 16, 2024 9:20 pm Post subject: |
|
|
So, I looked at my player again, and noticed that the video demodulator is getting significantly warmer than any other chip on the board, so I assume its dead like you said. So far, I haven't heard anything back from the eBay seller.
If I'm reading https://cedmagic.com/tech-info/rca-to-nte.html correctly, both the video (149036) and audio (149035) demodulaters have the same part equivalent, so I assume that the original parts are cross compatible with each other. Is this the case? Can I switch around the chips already in my player to have an audio chip to decode the video? I'd still have one left to decode audio, so it would just be a mono player. Would this be possible?
_________________
Glitchy Mario
SJT-100 (not working )
Sears 934.54780150/CED-1 Frankenstein |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
