phillips 47pfl7422d is dim on left side of lcd

[scapino]

Re: phillips 47pfl7422d is dim on left side of lcd

@ Tom66 and/or anyone -
I've removed all four 680uF / 35V caps. I've got a couple 1000uF / 50V caps from work - do you think I can use these or should I just order the correct caps?

I'm a field engineer, not a design engineer. If I remember my college days correctly, I should still be within the 20% tolerance if these are wired in series. However, if they are wired in parallel then I'd be well over 30% off on total capacitance. I'm assuming they are just starter caps, and taken out of the circuit once fully energized?

Thanks again!
-j

[newtothis]

Re: phillips 47pfl7422d is dim on left side of lcd

Well I found out that it totally depends on the circuit that is being worked on... For example whilst learning I changed a cap for a higher microfarad and voltage and it dodnt cause an issue, Did the same thing on another board and when plugged in... BANG! Fried 5 SMD ceramic resistors Lovely smell it made too but i fixed that and put the correct caps on and working fine.

Someone else will be able to give you a more precise answer as I'm still learning but thats my view anyway

[maiden790]

Re: phillips 47pfl7422d is dim on left side of lcd

Hi I have the same issue, slave had bad caps, replaced them, still dim. Looked at the ceramic fuse and it looks fine but then again a literally looked, I don't have a volt meter yet. What the hecks wrong with this thing?? Someone please help me out with this one please

[maiden790]

Re: phillips 47pfl7422d is dim on left side of lcd

okay i found out it is INDEED the ceramic fuse? now how do i look up the correct one and buy it in the united states?? its a KOAC 10A

[Widgeteer]

Re: phillips 47pfl7422d is dim on left side of lcd

Same Issue Here. No backlight, all 4 caps on inverter boards bad. Replaced 4 caps with replacement suggested on first page and left side still dim. Soldered jumper onto ceramic fuse and works perfect. Now ordering replacement for ceramic fuse, then fixing correctly.

[cervega]

Re: phillips 47pfl7422d is dim on left side of lcd

Replaced capacitors on the slave left side(there were burnt up, and I tested them for fun)- didn't work.
Replaced slave inverted board - didn't work.
Power going to master and slave are constant 24volts
Does this mean the bulbs are bad?

[wiru]

Re: phillips 47pfl7422d is dim on left side of lcd

Have you checked the fuses? Based on other replies in this thread, these could be o/c.

[cervega]

Re: phillips 47pfl7422d is dim on left side of lcd

Tested fuses they were fine on the inverter boards.
Is there any other fuses I should test, I saw a couple others fuses on the power board amd they tested fine as well.

[cervega]

Re: phillips 47pfl7422d is dim on left side of lcd

Can you replace the master board with a slave?