Help to fix power supply unit of a Projector.....

[Dishan]

LVPS unit of Optoma EP759 projector.
It's power integration IC has been exploded. Therefore I can't recognize it's number. If anyone know what is the correct number or correct IC,please reply.......
Circuit Board No:- QUASARPOWER QP-6421 Rev5
look at attached photo.

 

[Tony Stewart]

can't find anything with 6 pins with one missing unless it had 7 pins with one cut.

https://www.ti.com/lit/ds/symlink/lm2678.pdf

 

[pfofit]

TOP242-250
https://pdf1.alldatasheet.com/datasheet-pdf/view/219298/POWERINT/TOP242-250.html
see figs 41 to 45 in pdf. Check diodes , zeners and TVS around switching transformer for shorts and all others components connecting to the chip. Probably several toast, open or shorted.
It will be up to you to figure out which power rating it was.

Edited to add some pointers.

 

[vtech]

As an FYI, anytime you come across an odd pin out package for an IC (specifically a completely missing pin on an otherwise standard package ), check Power Integration.
It is classic indicator of their products.

 

[danielsoy]

may be u can download its service manual here:
**broken link removed**

 

[Dishan]

I

may be u can download its service manual here:
**broken link removed**

I get it. But it doesn't helpful for recognize IC.

 

[danielsoy]

thats right, unfortunately theres not info about the schematic diagram in the service manual.

 

[Jane11]

Recently I needed to repair a power supply which was controlled with IC( 6pins +1 missing).
It was ICE2A0565 (Off-Line SMPS Current Mode Controller) by Infineon.Unfortunatelly pin 2 was missing and you have 6pin missing.
But I think that a principle can be very similar( if not made also by Infineon)

 

[vtech]

Recently I needed to repair a power supply which was controlled with IC( 6pins +1 missing).
It was ICE2A0565 (Off-Line SMPS Current Mode Controller) by Infineon.Unfortunatelly pin 2 was missing and you have 6pin missing.
But I think that a principle can be very similar( if not made also by Infineon)

Thanks Jane 11. Definitely useful information.
In comparison though, as a spinoff of Siemens, Infineon's products tend to be prevalent in European markets.