01-03-2019, 10:52 AM
(This post was last modified: 01-03-2019, 10:56 AM by Geordie McBoyne.)
No more LED strips replacement jobs for me anymore.
Last week two Vestel TVs came in for repair, the usual LED backlight failure problem. Parts ordered from ASWO and delivered from France the next day. The first set to look at was a 40" Toshiba, the LED replacement job went OK except there is something else wrong with the set so that was a waste of time.
The other set is a 42" Hitachi. Again, after the scary business of handling the fragile screen the set displays a nice bright picture. Now for the final assembly, fit the escutcheon thing the goes around the screen panel, easy enough as it is a push fit. At the bottom left and right corners there is two small screws to secure the frame to the inner panel. First screw went in OK but the other, disaster! I was sure I heard what sounded like a cracked screen and sure enough it was. How could that happen? Anyway, that's the last backlight replacement job for me. I'm wondering if this type of job is being turned down by other TV engineers. Bear in mind the total cost for the LEDs including VAT was just over £100. Strangely, the 40" Toshiba LEDs were £55 and those for the 42" Hitachi were £45.
About those LED strips. In most sets the LEDs are wired in series therefore the result is one out all out. However, I find some LED lamps go short circuit which causes overloading the of the other diodes.
I'm aware that many engineers replace will replace a faulty diode rather than fit new LED strips. That's not a good idea because the set will soon come back in for repair.
Geordie McBoyne.
Last week two Vestel TVs came in for repair, the usual LED backlight failure problem. Parts ordered from ASWO and delivered from France the next day. The first set to look at was a 40" Toshiba, the LED replacement job went OK except there is something else wrong with the set so that was a waste of time.
The other set is a 42" Hitachi. Again, after the scary business of handling the fragile screen the set displays a nice bright picture. Now for the final assembly, fit the escutcheon thing the goes around the screen panel, easy enough as it is a push fit. At the bottom left and right corners there is two small screws to secure the frame to the inner panel. First screw went in OK but the other, disaster! I was sure I heard what sounded like a cracked screen and sure enough it was. How could that happen? Anyway, that's the last backlight replacement job for me. I'm wondering if this type of job is being turned down by other TV engineers. Bear in mind the total cost for the LEDs including VAT was just over £100. Strangely, the 40" Toshiba LEDs were £55 and those for the 42" Hitachi were £45.
About those LED strips. In most sets the LEDs are wired in series therefore the result is one out all out. However, I find some LED lamps go short circuit which causes overloading the of the other diodes.
I'm aware that many engineers replace will replace a faulty diode rather than fit new LED strips. That's not a good idea because the set will soon come back in for repair.
Geordie McBoyne.