Hi all bit of a newbie in this one I have a 49 inch pana that's not showing any picture bit if I put the av board in a cracked screen tv it comes up with a picture . Bottom board fuse is OK
-
-
Re: Panasonic tx-49fx550b no picture
Anywhere I could test on here ?Attached Files -
-
Re: Panasonic tx-49fx550b no picture
Measure the voltage each side of the tcon fuse.Comment
-
Re: Panasonic tx-49fx550b no picture
12.43v ether sideComment
-
Re: Panasonic tx-49fx550b no picture
Check that board for a short.Comment
-
Re: Panasonic tx-49fx550b no picture
What would I check ?Best place to start?Comment
-
Re: Panasonic tx-49fx550b no picture
The SMD diode networks, the coils and the caps.Comment
-
Re: Panasonic tx-49fx550b no picture
I 100% know the av board works tested in another telleComment
-
Re: Panasonic tx-49fx550b no picture
Yes, you stated that in your first post.
Check for shorts to ground on the coils and caps and the arrowed devices i believe are diodes.Attached FilesComment
-
-
Re: Panasonic tx-49fx550b no picture
Will do . What's the best way to test these apologies Im still learningComment
-
Re: Panasonic tx-49fx550b no picture
The diodes you test with diode mode placing the probes on each pin opposite each other then measuring again after reversing the probes.
For the coils put your multimeter into resistance mode with the black lead on ground, same with the capacitors.Comment
-
Re: Panasonic tx-49fx550b no picture
Thank you very much I'll give it a goComment
-
Re: Panasonic tx-49fx550b no picture
On this one with the 220 on with black to chassis it's beeping on all 4 corners but the other 220 's ain'tAttached FilesComment
-
-
Hello!
I recently got an old VHS player from Panasonic and just for fun I want to try to repair this device. It is an AG-1000B portable VHS player from 1990 and it has a problem with picture quality in playback mode.
Picture in playback mode is very noisy and often loses sync but the still images are nearly perfect.
I want to know, is this something that could be solved by recapping or is the video head likely gone?
Also, what mechanism is this?
Any feedback is appreciated!...05-06-2024, 07:16 AM -
Hi all
While I have quite a decent background in electrical & electronic troubleshooting & repairs, this is my first time stripping down an LCD TV for repair.... I have inherited a 3yr old Panasonic LCD which has a picture, but it is quite dark (too dark to be watchable - but still quite easy to see; I didnt need a torch to see it).
I started by checking and trying to adjust all of the picture and backlighting levels, but that made little to no difference. I also did a factory reset.
From there I envisaged that the backlighting wasn't working, however... -
Hello, I disassembled this dead camera, and found this WTF… Two fuses soldered one above the other !
I was pretty sure nobody touched it before, but that can't be from factory. There is flux, and capacitor is probably missing.
The other weird thing : the fuses are « G » fuse : (0.75A – 8V), seems very low. The original fuse should be « O » : (32V 2,5A).
There is « O » mark beside. All fuses have the same mark letter on main board. So, I can deduce it's a « O » fuse.
And this correspond to the issus I saw : when I plug the battery, I measure the voltage dropping... -
Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.
The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.
Original T-con:
Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.
First replacement T-con:
I thought it might be t-con and ordered new t-con from china(supposedly tested)... -
This was my main TV for the last 6 years. I'm not inclined to throw out a $2600 TV so quickly so I'm trying to investigate the issue.
Problem
TV was disconnected from power for 6 months during construction. When I plugged it yesterday picture was fine, after 30 seconds it dimmed then started developing horizontal lines, picture then starts to ghost vertically until it degrades into vertical streaks. TV always displays a perfect picture when cold. I can unplug TV for 5 minutes and plug it back in and picture is restored for 20 seconds. I can also keep it in standby mode...
Comment