I am attempting to repair the power supply of my air fryer. It comes on for a moment and then dies. I have traced the circuit (hopefully correct!). I have checked all the diodes, capacitors and resistors. I have not been able to find out the identity of the 8-pin controller. It looks a bit like the Viper12A but the pins do not match. Can anyone identify it please? Greetings from Western Australia, William
[image|3321349]
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It is impossible to see the markings on the IC with the naked eye. I have taken a photograph of the IC through my microscope and applied filters to get the best image. It appears to have two sets of numbers - PN6013 and L43A2A12. How does one distinguish between the part number and the production number?
I would be gratefulif anyone can shed some light on this - I need to know what type of controller IC it is.
[image|3321480]
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=== Update (05/30/24) ===
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Hello again SMPS Gurus! I have now replaced the PN6013 after replacing all the low ESR electrolytics but still the problem persists!
The voltage across the 4.7mfd capacitor on the high voltage section is stable at 340v (Our mains is 240v)
Upon switch-on the 5v secondary output across the 1000mfd capacitor on the low voltage section reads 5v for a second and then drops off towards zero. A few seconds later it comes back for a second and then drops off to zero, this then repeats.
The sawtooth waveform at the SW connection of the PN6013 does the same thing, goes to full swing and then dies down repeatedly. The voltage across the 220mfd does the same thing, rises to a steady level and then dies down repeatedly.
[image|3333003]I am attempting to repair the power supply of my air fryer. It comes on for a moment and then dies. I have traced the circuit (hopefully correct!). I have checked all the diodes, capacitors and resistors. I have not been able to find out the identity of the 8-pin controller. It looks a bit like the Viper12A but the pins do not match. Can anyone identify it please? Greetings from Western Australia, William
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[image|3333003]
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I am attempting to repair the power supply of my air fryer. It comes on for a moment and then dies. I have traced the circuit (hopefully correct!). I have checked all the diodes, capacitors and resistors. I have not been able to find out the identity of the 8-pin controller. It looks a bit like the Viper12A but the pins do not match. Can anyone identify it please? Greetings from Western Australia, William
[image|3321349]
-
-
It is impossible to see the markings on the IC with the naked eye. I have taken a photograph of the IC through my microscope and applied filters to get the best image. It appears to have two sets of numbers - PN6013 and L43A2A12. How does one distinguish between the part number and the production number?
I would be gratefulif anyone can shed some light on this - I need to know what type of controller IC it is.
[image|3321480]
+
+
=== Update (05/30/24) ===
+
+
Hello again SMPS Gurus! I have now replaced the PN6013 after replacing all the low ESR electrolytics but still the problem persists!
+
+
The voltage across the 4.7mfd capacitor on the high voltage section is stable at 340v (Our mains is 240v)
+
+
Upon switch-on the 5v secondary output across the 1000mfd capacitor on the low voltage section reads 5v for a second and then drops off towards zero. A few seconds later it comes back for a second and then drops off to zero, this then repeats.
+
+
The sawtooth waveform at the SW connection of the PN6013 does the same thing, goes to full swing and then dies down repeatedly. The voltage across the 220mfd does the same thing, rises to a steady level and then dies down repeatedly.
I am attempting to repair the power supply of my air fryer. It comes on for a moment and then dies. I have traced the circuit (hopefully correct!). I have checked all the diodes, capacitors and resistors. I have not been able to find out the identity of the 8-pin controller. It looks a bit like the Viper12A but the pins do not match. Can anyone identify it please? Greetings from Western Australia, William
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[image|3333003]I am attempting to repair the power supply of my air fryer. It comes on for a moment and then dies. I have traced the circuit (hopefully correct!). I have checked all the diodes, capacitors and resistors. I have not been able to find out the identity of the 8-pin controller. It looks a bit like the Viper12A but the pins do not match. Can anyone identify it please? Greetings from Western Australia, William
[image|3321349]
+
+
It is impossible to see the markings on the IC with the naked eye. I have taken a photograph of the IC through my microscope and applied filters to get the best image. It appears to have two sets of numbers - PN6013 and L43A2A12. How does one distinguish between the part number and the production number?
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I would be gratefulif anyone can shed some light on this - I need to know what type of controller IC it is. [image|3321480]
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I would be gratefulif anyone can shed some light on this - I need to know what type of controller IC it is.
I am attempting to repair the power supply of my air fryer. It comes on for a moment and then dies. I have traced the circuit (hopefully correct!). I have checked all the diodes, capacitors and resistors. I have not been able to find out the identity of the 8-pin controller. It looks a bit like the Viper12A but the pins do not match. Can anyone identify it please? Greetings from Western Australia, William
[image|3321349]
+
+
It is impossible to see the markings on the IC with the naked eye. I have taken a photograph of the IC through my microscope and applied filters to get the best image. It appears to have two sets of numbers - PN6013 and L43A2A12. How does one distinguish between the part number and the production number?
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+
I would be gratefulif anyone can shed some light on this - I need to know what type of controller IC it is. [image|3321480]
I am attempting to repair the power supply of my air fryer. It comes on for a moment and then dies. I have traced the circuit (hopefully correct!). I have checked all the diodes, capacitors and resistors. I have not been able to find out the identity of the 8-pin controller. It looks a bit like the Viper12A but the pins do not match. Can anyone identify it please? Greetings from Western Australia, William
[image|3321349]