Hello all,
I have been trying to troubleshoot this Emerson TV and have not had any success. I would really appreciate any guidance as I am stuck on what to check next.
The issue is that the TV will enter standby mode with solid red LED light on front of unit after being plugged in. When pressing power-on button the red LED will flash 3 times and then power off and return to standby mode with a constant red LED.
I have tried working my way through the service manual and am stuck. On page 26 of attached service manual I am following FLOW CHART NO. 1....
amosfolz
Member
Last Activity: 09-29-2021, 03:55 PM
Joined: 06-12-2013
Location: Marion, IN
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EMERSON LF320EM4 A (serial number ME7 - TYPE F)
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Re: ATX Power Supply - Dell XPS ONE A2010 - DPS-200PP-164
I went ahead and replaced the large 450v 150uf capacitor and reflowed any solder joints I thought looked suspicious.
Just to avoid future issues I replaced the few other LTec caps I found on the board even though they tested good with my ESR meter.
The power supply is now putting out a steady +12v and +5v and the machine is booting up without issues.
Thanks everyone for your input and help with this, I really appreciate it.
Happy new year and blessings to everyone. -
Re: ATX Power Supply - Dell XPS ONE A2010 - DPS-200PP-164
I am hoping to get an adjustable temperature iron from the wife for Christmas. I was having issues when trying to remove the solder on this board as I do not think my iron was getting hot enough.
Thank you everyone for your input. I've been out of town for holidays but will give an update as soon as I get home and have a little free time to work on this.Leave a comment:
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Re: ATX Power Supply - Dell XPS ONE A2010 - DPS-200PP-164
Would the component in picture_002 be the +12v rectifier?
The noise is coming from what I believe is a transformer, circled in picture_001.
The large capacitor in picture_03 made my DMM begin to make the same noise as is coming from the power supply when I touched the positive lead of the capacitor with either negative or possitive lead from DMM.
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Re: ATX Power Supply - Dell XPS ONE A2010 - DPS-200PP-164
I tried using a jumper between PS-ON and ground and starting the power supply while it was not connected to anything else. It turned on for a few seconds and then immediately turned off.
I then plugged the hard drive into the system and the results were the same as what I originally posted....Leave a comment:
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Re: ATX Power Supply - Dell XPS ONE A2010 - DPS-200PP-164
Sorry for the confusion. I was referring to the +5v and +12v outputs.
The +5v line was a steady +5.1v. I assumed that was probably acceptable.
The +12v line did not get above +5v, and jumps around between +2v to +4v.
I tested the power supply while it was plugged into the mother board. The hard drive was not connected to the motherboard at the time. Power to the hard drive comes off the motherboard on this unit instead of directly from PSU.Leave a comment:
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ATX Power Supply - Dell XPS ONE A2010 - DPS-200PP-164
Good evening all,
I am trying to repair an ATX power supply out of a Dell XPS ONE A2010. This is an all in one desktop computer. The power supply is a Delta DPS-200PP-164. I have been unable to find a schematic or anything helpful online. Repairing PCB boards is a hobby and I am slowly teaching myself. I can use a DMM and have an ESR meter, but no other test equipment.
I am looking for any advice on where to further investigate.
Here is what I've determined so far:
-5v output is OK
-12v output jumps around between 1v – 4v
-There is... -
Re: New Members - please post your introductions here
My name is Amos and I work in the IT support field.
I have been teaching myself to repair electronics as a hobby and really enjoy resurrecting equipment that would have otherwise been discarded. I appreciate this forum and all the knowledge willingly shared. I hope to one day be a valuable contributor myself.Leave a comment:
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