Re: Samsung SMPS for LCD TV
Do you have any schematics of F9222L ? The ones i have seen is rudimentary and have no information on nominel voltages or such....
BR Lars...
lindemose
Member
Last Activity: 01-07-2013, 06:48 AM
Joined: 10-15-2012
Location: copenhagen
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Re: Samsung SMPS for LCD TV
The 450 CapXon will NOT be changed - not now anyway - the costs of a single high power cap i ridiculous thus i will keep the original.....
ALL other elctrolytic caps on the schematic has been replaced though..Leave a comment:
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Re: Samsung SMPS for LCD TV
I recieved the replacement chip F9223L today and replaced the expected faulty F9222L.
This did the trick !
all voltages are nominel and later I will reinstall the SMPS into the TV and hopefulle it all turns out well.Leave a comment:
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Re: Samsung SMPS for LCD TV
It's a CapXon allright. Your keen eyes serves you well
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Re: Samsung SMPS for LCD TV
No, I dont see any markings on it. It is a film type and the value is within 5% of the 150 UF, thus I think it works.......Leave a comment:
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Re: Samsung SMPS for LCD TV
Yes, that part of the circuit is working and the voltages ON/OFF and STBY is correct.Leave a comment:
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Re: Samsung SMPS for LCD TV
The DC voltage vas off by 15 V, it read : off = 310V and ON = 385V. Since there is a difference in ON/OFF voltages I take it as the PFC is working........Leave a comment:
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Re: Samsung SMPS for LCD TV
Have replaced all caps both Electro, film and ceramics, no change !
also I saw that the F9222L power circuit was replaced by some other members with succes I will order one and replace it.Leave a comment:
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Re: Samsung SMPS for LCD TV
Hi Japlytic,
That is correct and this remedy was the first i tried out. However i have only replaced all electrolytic caps. Maybe i should replace all once......... i'll try this out and get back with an update.Leave a comment:
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Samsung SMPS for LCD TV
Hi all,
This is my first post on this forum so bear with me if anything is missing...
My Samsung LCD SMPS gives me some headache.
I have attached a picture below:
The 24V line never reaches 24 volts but are stuch at 12.4 V and the F9222L does not compensate for this correctly, some how there is an error in the feedback mechanism in play.
I have also attached the schematics for this particular SMPS. There is a known typo on page 2, yje opto-couple is NOT attached to the 13V line as indicated but to the 24 v line.
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