Re: lcd19-229 stand by light on and off
ok thanks tom i will get there in the end but reading not my strong point
hence why i fit kitchens and build cars lol
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Re: lcd19-229 stand by light on and off
Other places to buy
http://www.ebay.co.uk/itm/ic-sop-8-A...-/400538572096
http://www.aliexpress.com/item/AIC28...449252694.html
BTW, dot always marks pin 1.Leave a comment:
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Re: lcd19-229 stand by light on and off
From the pictures, it looks OK to me.Leave a comment:
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Re: lcd19-229 stand by light on and off
It's actually AIC2857F. Is it physically burnt? Your results indicate it is not functioning, in the very least.
One on eBay, they're about £5 each
http://www.ebay.co.uk/itm/1PCS-Brand...item3cc84b952e
but plan on about 2 weeks to get it from China.
See diagram here:
http://www.analog.com.tw/p2_6_detail...idTableName=05
Pin 2: input voltage, this is OK (12V from PSU)
Pin 5: output feedback, should be 1.25V - not OK indicating the output voltage is not present
Pin 7: on/off command, it is >2V indicating the main board processor says "I want power" but converter does not function. (Like a light switch which is on but with a blown light bulb.)Last edited by tom66; 03-04-2014, 04:20 PM.Leave a comment:
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Re: lcd19-229 stand by light on and off
hi tom that parts is burnt would that be all that the problerm is ? if so do you have link for that as cant find a match
pin 2 = 12.83 pin 5 =000 pin 7= 5. my dot is where pin 1 isAttached FilesLast edited by tonyuk; 03-04-2014, 04:15 PM.Leave a comment:
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Re: lcd19-229 stand by light on and off
OK please check voltages on: pin 2, pin 5, and pin 7
Pins are counted as such, starting from dot:
Leave a comment:
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Re: lcd19-229 stand by light on and off
Part # printed on device U7 please?Leave a comment:
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Re: lcd19-229 stand by light on and off
Hmm, my error on the 1.25V. That is OK, it is just normal adjustable type. doh.
Readings seem good, so there's little more to suggest.
Can you see part U7 near one of those LDOs? What is the part # on it?Leave a comment:
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Re: lcd19-229 stand by light on and off
Can you try making the measurements as you turn the set on for the last three? You may have to turn it on and off a lot of times. A close picture of the power supply showing the label would help too.Leave a comment:
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Re: lcd19-229 stand by light on and off
ok so below is list
1st
=000
=3.31
=5.07
2dr
=000
=3.32
=4.98
3dr
=000
=3.31
=4.97
this is the 1.25v
=0.61
=1.86
=3.38
this is me testing with light stuck on red stand by black lead to screw red to each pin left to right lolLast edited by tonyuk; 03-04-2014, 02:30 PM.Leave a comment:
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Re: lcd19-229 stand by light on and off
Haha, maybe for you, honestly I'd probably fit the kitchen upside down and have half the parts from the engine missing.Leave a comment:
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Re: lcd19-229 stand by light on and off
20V, because that's the maximum range your meter can support. If you tried to read 3.3V on a 2V range, your meter would just show over-range ("OL" or single "1")Leave a comment:
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Re: lcd19-229 stand by light on and off
ok and says you test on 20v setting yes ? even though i thought 2v would of been the way lolLast edited by tonyuk; 03-04-2014, 01:56 PM.Leave a comment:
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Re: lcd19-229 stand by light on and off
Top are 3.3V, bottom is 1.25V.
The voltages should be tested left to right, in the orientation in which the labelling on them reads the right way around i.e. you don't have to crane your neck
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