Hi!
I was wondering if you could tel what usually makes a stripe to display?
Is it a faulty videoboard or trouble in lcd display?...
820uF
Member
Last Activity: 02-18-2016, 06:13 AM
Joined: 04-25-2012
Location: Magadan
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What makes a stripe to display
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Re: Lg m228wa
Thak you all for help.
U101 was bad. -
Re: Lg m228wa
D102, D101 ok but R108 - From color code [COLOR="DarkOrange"]orange;orange;[/COLOR][COLOR="Silver"]silver;[/COLOR][COLOR="Yellow"]gold[/COLOR] it's Resistance Value:
0.33 ohms, +/-5%, but multimeter shows 0.7ohms. could that be the problem?Re: Lg m228wa
D102, D101 ok but R108 - From color code [COLOR="DarkOrange"]orange;orange;[/COLOR][COLOR="Silver"]silver;[/COLOR][COLOR="Yellow"]gold[/COLOR] it's Resistance Value:
0.33 ohms, +/-5%, but multimeter shows 0.7ohms. could that beLeave a comment:
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Re: Lg m228wa
No power on CW201 at all.
[url]http://imgur.com/HmxfB4s.jpg[/url]
Under D102 looks pretty burned.
Is there any scematics for this board around?Re: Lg m228wa<br /> <br /> <br /> ... board around?Re: Lg m228wa
No power on CW201 at all.
[url]http://imgur.com/HmxfB4s.jpg[/url]
Under D102...Leave a comment:
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Lg m228wa
Changed caps but, fuse is fine but still doesn not take power in.
Even the power led doesn't light up.
Transformer? -
Re: After replacing caps transformer starts to buzz
LG - W1942S
Pics of power board:
[url]http://imgur.com/a/IdW5I[/url]
C207 one leg copper is loose from board but works fine.
haven't replaced big high voltage filter capacitor. Seems all flat from top - no need to raplace.
all soldered legs tested with beep function - all good. Also tested loose copper track from various distant points.Re: After replacing caps transformer.../a/IdW5I[/url]Last edited by 820uF; 03-29-2013, 09:32 AM.Leave a comment:
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Re: Hyundai ImageQuest L70S+
replaced this TL431CLP and sameLeave a comment:
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Re: After replacing caps transformer starts to buzz
pic of transformer:...Leave a comment:
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Re: After replacing caps transformer starts to buzz
35v 470uF
maby try biger voltage ones there?Leave a comment:
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After replacing caps transformer starts to buzz
After replacing caps transformer starts to buzz when display is not lid up.
For example if display goes to standby mode it starts to buzz on powerboard.
Is there any general fix for that ? -
Re: Hyundai ImageQuest L70S+
is "TL431CLP 2.5-36V 100mA" suitable replacement for this "UTC TL431 SAF" ?Leave a comment:
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Re: Hyundai ImageQuest L70S+
IC1 offboard
on 2M
Pin 1 & 2 - first it showed jumping numbers around 1.400, now it shows nothing
Pin 1 & 3 - nothing
Pin 2 & 3 - nothing
IC1 offboard
on 2k
Pin 1 & 2 - like runs out of scale
Pin 1 & 3 - 1.207
Pin 2 & 3 - .913
IC1 offboard
on 20k
Pin 1 & 2 - like runs out of scale
Pin 1 & 3 - nothing
Pin 2 & 3 - nothing
IC1 offboard
on 200k
Pin 1 & 2 - like runs out of scale
...Leave a comment:
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Re: Hyundai ImageQuest L70S+
on 20k function
IC1
Pin 1 & 2 - 1,02
Pin 1 & 3 - 4,09
Pin 2 & 3 - 3,71
[URL="https://www.badcaps.net/forum/attachment.php?attachmentid=56875&d=1359667685"][/URL]Re: Hyundai ImageQuest L70S+
on 20k function
IC1
Pin 1 & 2 - 1,02
Pin 1 & 3 - 4,09
Pin 2 & 3 - 3,71
[URL="https://www.badcaps.net/forum/attachment.php?attachmentid=56875&d=1359667685"][/URL]Last edited by 820uF; 01-31-2013, 03:58 PM.Leave a comment:
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Re: Hyundai ImageQuest L70S+
on 20k function
IC2
Pin 1 & 2 - 9,93
Pin 1 & 3 - 3,7
Pin 2 & 3 - 13,64...Last edited by 820uF; 01-31-2013, 03:28 PM.Leave a comment:
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Re: Hyundai ImageQuest L70S+
U1
pin 1 = 0,01
pin 2 = 2,50
pin 3 = 4,40
U3
pin 1 = 0,01
pin 2 = 3,30
pin 3 = 4,40...Leave a comment:
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Re: Hyundai ImageQuest L70S+
both sides 16,12V it droped about 2minutes from 16,4V - same voltage as 12v pin has.
pics of mainboard:...Leave a comment:
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Re: Hyundai ImageQuest L70S+
replaced this cap (47uF 50V) with same parameter cap and still same blinking....Last edited by 820uF; 01-31-2013, 10:49 AM.Leave a comment:
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Re: Hyundai ImageQuest L70S+
actually the display powers on after some time led blinkingLeave a comment:
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Re: Hyundai ImageQuest L70S+
F3 fuse is ok. current flows thru - no resistance.
Now about voltages - when video board connected they start jumping -
12V: 11-18V
5V:1,5-4,5V
SLP: 0,00V
MID: 0,7-2,4V
When video board not connected:
12v: 12,24V
5V: 4,98V
SLP: 0,00V
DIM: 2,57VLeave a comment:
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Hyundai ImageQuest L70S+
Hi!
I have this problem with this display "when power cable connected, power button green LED blinking" Nothing happens when button pressed.
All caps look fine.
Transistor secondaries differ under 3%
Big Diodes show:
...with 2k ohm function:
D3. .256 back on cathode side, second way it shows .743
D6. .256 back on cathode side, second way it shows .747
Images from power poard:...
No activity results to display
Leave a comment: