hi having probs with this , the unit powers up and the screen lights up for 20sec's and then powers down again , and the psu 17PW01-4 buzz's any ideas with this issue common i seen, cant see any badcaps on the board.
technika 42 lcd 910 power probs
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Re: technika 42 lcd 910 power probs
Your fault is different from last guy's. Check 24V across CapXon on inverters.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
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Re: technika 42 lcd 910 power probs
is you multi meter auto ranging or manual can you post pictures of the boards on your set they we can point out for you the test points etc.Comment
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Re: technika 42 lcd 910 power probs
put you meter on diode test and the three diodes you have highlighted should have a reading in one direction only if any read odd you will have to unsolder 1 leg on each diode and then retest them.
tom will explain what he needs tested and how ie meter setting etc if your not sure.
if your not sure of the meter settings post a picture up and we will highlight the diode and dc settings for youLast edited by vinceroger69; 02-22-2013, 05:12 AM.Comment
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Re: technika 42 lcd 910 power probs
This pic: https://www.badcaps.net/forum/attach...8&d=1361530364
Two brown caps (cylinders) on inverter board: check voltage across them.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: technika 42 lcd 910 power probs
This pic: https://www.badcaps.net/forum/attach...8&d=1361530364
Two brown caps (cylinders) on inverter board: check voltage across them.
the diodes i get the same for all 3 a reading of 127-130
and the voltages accross the brown caps one reads 24v and the other only 5v the t.v slips back into standby, the caps look like they have been changed before lots of flux resin and moody solder joints.Comment
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Re: technika 42 lcd 910 power probs
hi all thanks for quick replys ok
the diodes i get the same for all 3 a reading of 127-130
and the voltages accross the brown caps one reads 24v and the other only 5v the t.v slips back into standby, the caps look like they have been changed before lots of flux resin and moody solder joints.
of them on the invertor boards before she shuts down .Comment
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Re: technika 42 lcd 910 power probs
Ah, so you get 24V, then it rapidly falls off? When it does this, does the power LED begin blinking?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: technika 42 lcd 910 power probs
power led does not blink at all, i changed some of the caps on the isolated side of the psu, same as the other chap did, and now it switches on and then back off within a couple of secondsComment
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Re: technika 42 lcd 910 power probs
Do you have 24V on those caps briefly when power is first applied to the set?
What brand and series of capacitors did you use?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: technika 42 lcd 910 power probs
but the behaviour of the fault has now changedComment
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Re: technika 42 lcd 910 power probs
You need to use low-esr capacitors. Farnell sell them as do RS. Capacitors from the average shop can cause lots of issues. Good capacitors to use are Panasonic FC, FM or FR.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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