My first post so be kind guys.
After retiring I've taken up a bit of TV repair and am amazed how helpful forums like this are and how much help there is out there.
I've recently got a Toshiba 37” TV with extreme ghosting problems, the fault was so bad that there was no chance of even working through the menus to tune it in. All indications pointed to the poor bonding of the TAB bonds to the LCD display.
I've read many posts about placing some packing material on the LCD Tab bond where the flexprint connects to the pcb but wanted to try to effectively re-solder the connections. Here is how I managed it.
1. Take some ordinary kitchen grease proof paper and fold it in half to achieve double thickness.
2. Place it over the flexprint where it connects to the pcb.
3. Rub your soldering iron quickly back and forth in a circular pattern over the grease proof paper on top of the connections. Cover about 5mm of the connector at a time before moving along the connector to the end.
That's it.
The idea of the paper is to reduce the direct heat to the connection by dissipating it somewhat while heating the connection just enough to do the job.
Take great care not to touch the flexprint with the soldering iron directly as it is possible to burn it and destroy it completely. Modern cables are quite robust and will be ok but be on the safe side and take your time.
I did have to do this twice as the first time I cured the fault but found a slight intermittent dimming on part of the display. After a second time all faults disappeared.
As a precaution I will also add some packing material to try to stop the fault from re-occurring.
Good luck everyone.
I hope this is all clear, all questions, comments or criticisms welcome.
Tim
After retiring I've taken up a bit of TV repair and am amazed how helpful forums like this are and how much help there is out there.
I've recently got a Toshiba 37” TV with extreme ghosting problems, the fault was so bad that there was no chance of even working through the menus to tune it in. All indications pointed to the poor bonding of the TAB bonds to the LCD display.
I've read many posts about placing some packing material on the LCD Tab bond where the flexprint connects to the pcb but wanted to try to effectively re-solder the connections. Here is how I managed it.
1. Take some ordinary kitchen grease proof paper and fold it in half to achieve double thickness.
2. Place it over the flexprint where it connects to the pcb.
3. Rub your soldering iron quickly back and forth in a circular pattern over the grease proof paper on top of the connections. Cover about 5mm of the connector at a time before moving along the connector to the end.
That's it.
The idea of the paper is to reduce the direct heat to the connection by dissipating it somewhat while heating the connection just enough to do the job.
Take great care not to touch the flexprint with the soldering iron directly as it is possible to burn it and destroy it completely. Modern cables are quite robust and will be ok but be on the safe side and take your time.
I did have to do this twice as the first time I cured the fault but found a slight intermittent dimming on part of the display. After a second time all faults disappeared.
As a precaution I will also add some packing material to try to stop the fault from re-occurring.
Good luck everyone.
I hope this is all clear, all questions, comments or criticisms welcome.
Tim
Comment