Re: smd code 431
Not likely the board has at least 10 of the devices and it is to small for any power smd sot23 package . Thanks for the response
chetreynolds
chet
Last Activity: 01-10-2016, 08:58 AM
Joined: 08-14-2010
Location: london arkansas usa
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smd code 431
I have a model dps-475ap power supply from a vizio tv > It has several smd sot 23 devices marked 431h my code book lists it as a zener diode . But my compenent tester indicates that it is an npn transistor with non typical pin out outs ebc base the top single pin . It is also marked as ic... on the board other transistors are labelet q... and diodes are labeled d...
Any sugestions on how to identify this device? -
Re: Vizio V0420E no power
no it isa connected normallyLeave a comment:
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Re: Vizio V0420E no power
The standby voltage is 1.2vdc with the main board disconnected
I attempted to post pics but they were not includedLeave a comment:
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Vizio V0420E no power
I need help with a vizio v0420e power board # PLHL-T802A
The main fuse was blown
after the fuse was replaced I had a very bright light when using a 25 watt lamp in series with the ac input
I replaced a shorted mos fet a K13a600 after which the lamp was no longer lit
when powered up normally the main dc voltage was 186 VDC
The stand by voltage was 1.2 volts should be 5vdc
all other voltages were o
I removed and tested all electrolytic caps ESR and value
Tested all thru hole Fets
Tested all diodes including the zener diodes
... -
Re: turn on power board with jumper
thanksLeave a comment:
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turn on power board with jumper
What is a good procedure for turning on the power supply without the main board . -
Re: dell e228wfp goes blank
All of the caps are ok and have a low esr when measured in circuitLeave a comment:
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Re: dell e228wfp goes blank
yes I only have an analog inputLeave a comment:
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dell e228wfp goes blank
I have a dell monitor that turns the invereor off when an input is attached . The inverter turns back on when the input is removed.... -
samsung ls19mj wont detect input
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I recieve an on screen message check input signal .
Need to know where to start. -
Re: vizio e370vl no power
I am unable to upload pics I get a missing security tag error .Leave a comment:
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vizio e370vl no power
I need help with a zizio e370vl .It has a yellow power indicator that flashes to white and back to yellow .
I have removed and checked the esr on all caps all were below .1 ohm .
I have removed and checked all of the large transistors and fets .
I am unable to find data sheets for what appear power controller chips that have the following markins
as324am mp1008es mps 0930
ta2be 742mr5yb
The power board model # is dps-192ap
I have attacheds some picks of the board there no aereas of the board that show evidence of over heating . -
Re: dell isperion 9400 will not power on
problem solved it was a poorley seated memory chipLeave a comment:
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dell isperion 9400 will not power on
This laptop will not power on .The keyboard indicator leds have 1 solid green and 2 flashing . I dont have a good battery to check if it would run on batterys. -
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Re: nforce 790i post
sorry I must be in the wrong forum . I thought that this was one to provide help not insults .Leave a comment:
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Re: nforce 790i post
how do I reflow the chipset ?Leave a comment:
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nforce 790i post
Does this mother board require memory to do a post . I have one with no memory it powers up the fans but there no display and no beep code . -
Re: view sonic 3260w
Thanks I had it installed right . I noticed how you subsited the diode good idea when you cant find an smd .Leave a comment:
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