Re: philips 55pft5201/79 no power
ok ive spent some time on the back of the board and i might have found more issues theres 2 banks of 3 diodes in both banks 2 diodes check ok but i get readings both ways on the bottom diode on each bank,
im gonna have to get better pictures as you cannot make them out in the photos as they are so small, ill do that later
on the top side of the board on the hotside there is a inductor next to a huge grey resistor, im getting 0000 on my multimeter on this resistor in ohms and diode mode is this correct ? i wasnt expecting...
odgaf
Member
Last Activity: 01-05-2023, 05:42 AM
Joined: 04-11-2015
Location: PAKENHAM
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Re: philips 55pft5201/79 no power
i really want to fix this tv, its a huge upgrade for me, im broke and in lockdown in melbourne, im getting a more powerful soldering iron if needed to get the heatsinks off
under the black heatsink is the rectifier and a mosfet, under the silver heatsink is an icLeave a comment:
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philips 55pft5201/79 no power
hiya i got this tv off a rubbish tip, its in excellent physical condition, but no power no led
i popped the back off took the board out and did some probing with a multimeter, i found a bank of 3 diodes on the cold side that all came up short, i clipped one leg off each one and the last one was dead short, the other diodes are no longer short and give a lowish voltage drop of 0.144 and 0.154
the diode i took off read dead short and its an SR5100L
ive ordered this diode an sr5100 its a Schottky but it has no l suffix will it be ok?
im trying to upload... -
Re: tv not turning on, some caps replaced same error
i triple checked the caps, and all have correct polarityLeave a comment:
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Re: tv not turning on, some caps replaced same error
bah sorry its a soniq e40s12a
hmm strange readings on voltage, i just repeated test 3 times and im now getting 203vdc on all 3 mains caps using both chassis ground hole and the ground wire i get same results, im in australia
soon as i fire the set up all 3 caps stop boosting at 270vdc
im putting black probe on chassis red probe to cap leg soon as i flick power to put set into standby the caps boost to 203, then when i turn set on they rise to 270vdc the backlight either flickers once...Last edited by odgaf; 12-29-2017, 02:44 AM.Leave a comment:
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tv not turning on, some caps replaced same error
hey people happy xmass and new year etc
i have a tv soniq e40s12a that will turn on only sometimes, i checked the green caps and replaced ones that were failing still same problem
i then checked mains filter caps and 2 are 33uf, but the bottom one was only 30 uf, i then checked the voltage across them and i am getting 220dc in standby, which rises to 270v when set turned on which as i understand means there might be a boost problem
total noob here but i have all tools i need to carry out suggestions
i have inked the green caps i changed,... -
Re: Samsung un65f6400afxza nothing but vertical bars
the lines could possibly be bad panel or bad tcon/cables, or a hundred other things, open the back up take some pics and post them
reseat all tcon cables, unplug the left side of tcon and turn tv on, do same with right side to see if screen corrects itself might even be the mainboard cpu
im learning here just like you so im sure someone will be able to better answer your questions, but in the meantime investigate tconLast edited by odgaf; 01-23-2017, 09:55 PM.Leave a comment:
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Re: Just for a laugh
vestels patented advanced soldering blob passive heatsinks dissipate heat from failing LEDS prolonging the life of your tv set for at least 3 months
showcased by the LED on the left, while the led on the right is a factory koganLast edited by odgaf; 01-23-2017, 09:36 PM.Leave a comment:
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Re: Cracked Screen plasmas and buffer/ysus board
haha at the tartan paint i vaguely remember being sent for that when i was a kid lol, also the glass hammer, the tin of elbow grease, also i remember being sent to the bakers for virgin tarts and it took me a long time to figure our why i never got the same tart
sky hooks and long weights ahahaha i got some victims lined up for thoseLeave a comment:
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Re: camera advice needed for rookie mistake, blown fuse on mainboard
yeh i got the alcohol just need to borrow me exes toothbrush
i managed to get flux everywhere
if the caps are bridged, whats the best way to unbridge them, they are smaller than the point on my soldering iron, would i just remove them with hot air tin the pads and put them back on with hot air ? or is it easier to order the new parts ?, in the meantime im going to check the block diagram on service manual to see if they are linked anywayLast edited by odgaf; 01-19-2017, 06:50 AM.Leave a comment:
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camera advice needed for rookie mistake, blown fuse on mainboard
hey wassup people, i bought some cheap cameras, the first a sony hx-300 with a known lens error, i purchased a new lens from china for 60 dollars and installed it and tested it while disassembled, it was working, however i left the battery in while i assembled it and now it wont turn on, i stripped it down and found a blown fuse on the mainboard, its the tiniest fuse and i removed it with hot air, i then tried to bridge the pads but they are so tiny i couldnt do it, the sony part for this fuse is 1-576-612-31 and ive had trouble finding it, i got the service manual its a 32v 1amp fuse but im having... -
Re: samsung white screen replaced as15
im a noob at this, could ya elaborate, would that mean the tcon needs further investigation, what sends power to the chip and how would i measure that
thanks for replyLeave a comment:
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samsung white screen replaced as15
hi people
i had a samsung 40" with totally white screen, i ordered a new as15 from china and replaced the ic, it worked well for an hour but is slowly fading back to white
im gonna open her up again and give the chip another blast from the hot air, but i also have another ic as i ordered 2, but i dont want to waste them if there is something else that could be causing it, also this ic did not have a heatsink or heatpad
any advice i could glean before i carry out the surgery? -
Re: TCL b2610 powers up, backlights on, sound on, no picture
so i cleaned the ribbon much as i could and the connector and same blank screen, i disconnected the entire ribbon, still same blank screen
i removed the connector with hot air , it looks pretty screwed, anyone know if this is burnt? i also need to know the name of it so i can maybe source a new ribbon and connector, failing that the boards are pretty cheap from china maybe 10 bucks but how hard are those tab bonds to remove with hot air ??? theres 2 to remove,
im thinking this tv is junk but i have the tools...Last edited by odgaf; 12-17-2016, 12:31 AM.Leave a comment:
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Re: TCL b2610 powers up, backlights on, sound on, no picture
and here are the pics of the connector and ribbon cable
does this look burnt? it looks like gunk...Last edited by odgaf; 12-16-2016, 11:10 PM.Leave a comment:
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Re: TCL b2610 powers up, backlights on, sound on, no picture
finally got my new phone, heres the pics...Leave a comment:
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Re: TCL b2610 powers up, backlights on, sound on, no picture
thanks for the heads up dude, while looking for smd fuses on the lower boards connectors i saw what looked like tiny black marks on the back of one of the white transparent ribbon connectors which join the 2 lower boards,
i took the ribbon cable off and it had some gunk or corrosion covering many of the gold pins on one side and clean shiny pins on the other , im almost thinking its some liquid damage maybe thats come through the bezel, the screen was utterly grubby before i cleaned it with rubbing alcohol....Leave a comment:
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Re: LG LN5700 logo flash then dark screen
im a noob too but your problem sounds suspiciously similar to my lg 50inch
i bought mine broken its a 3d smart jobbie, the original issue was it would turn on then soon as i changed channels or volume etc it would switch off, i took it apart overnight disconnected boards etc and it came good for a month, then it started failing to turn on and stay on at night but was sometimes ok during the day,which made me suspicious about its operating temeratures so i went over the powerboard with the soldering iron adding solder to all caps voltage...Leave a comment:
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Re: TCL b2610 powers up, backlights on, sound on, no picture
ok ive been trying to test the 3 large voltage regulators on the logic board while powered on and im getting really weird readings,
u103 top rightish of board
3.2v output
5v input
00.70 adjustment ???
u104 just near tuner
3.3v output
5v input
00.65 adjustment
u803 middle board among caps
1.8v output
5v input
560.0 adjustment
i will update these pics soonLast edited by odgaf; 12-15-2016, 06:42 AM.Leave a comment:
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TCL b2610 powers up, backlights on, sound on, no picture
hi people
i have here a tcl b2610 39 incher led lcd with a blank screen bl- on and sound on
im a nooby fixing tvs but im learning and reading a lot
this tv has a power board and i think a logic board with inbuilt tcon?? [not sure] and 2 boards on the bottom edge of the screen which i think are led drivers or tcon??
ive gone over the caps on the logic board in circuit with my esr meter nothing fishy there, i checked diodes on the power board and found one reading 0.245 voltage drop off which i thought was slightly low, but power seems fine,so im guessing my next...Last edited by odgaf; 12-15-2016, 04:33 AM.
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