EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: Lion_Tamer on February 04, 2016, 10:17:08 pm
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Hi All
I am trying to mend a control board for a washing machine where the power supply IC has blown but as yet I have not been able to identify it and wondered whether the vast knowledge and wisdom of the community here could help.
The details that I can make out of the chip are:
- Make: Philips Semiconductor
- Package: 14 Pin Soic
- Line 1: ....2T
- Line 2: ....935
- Line 3: ....052
The board dates from around 2005/2006 era, I don't yet know why the chip failed but it is the only visually blown component, there is also a fusible resistor in the power feed to it that is OC.
The circuit layout around the chip appears to be this:
- Pin 1: Decoupling capacitor to ground? also feeds into a couple of transistor?
- Pin 2: Ground
- Pin 3: Ground
- Pin 4: Ground
- Pin 5: Ground
- Pin 6: Parallel Resistor and Capacitor to Ground
- Pin 7: Parallel Resistor and Capacitor to Ground, also feeds into a couple of transistors?
- Pin 8: Resistor to low voltage positive
- Pin 9: Ground
- Pin 10: Ground
- Pin 11: 1 Ohm Sense resistor to ground
- Pin 12: Not Connected
- Pin 13: Not connected
- Pin 14: Transformer Winding
Thank you
Jem
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very wild guess: http://www.farnell.com/datasheets/60405.pdf (http://www.farnell.com/datasheets/60405.pdf)
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Looks very plausible. TEA1522T. Pinout seems to match.
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Can I ask how you got on in the end?
I tried once in the past.
I had an exploded TEA1522t and bought a replacement from eBay.
Mine turned on but there was another fault where the water inlet valve operated continuously.
Did you have better luck?