Re: identify U102 TOSHIBA 55 INCH 55L310U LED TV

Thanks BudM I looked at the PDF which you sent.. It has the VCC as Pin 1

As far a I can see pin 6 goes to the startup resistors.. The last one being R109, which you can see on the picture.. As soon as you cross r109 to (pin 6 ??) the voltage is swamped to about .5 volt
I removed r137 and c126 (both connected to pin 6) because I thought they might be leaking, and loading down the vcc (Had trouble because I never did much surface mount stuff)

so wouldnt Pin 6 be VCC, or am I counting the pins wrong...

TOSHIBA 55 INCH 55L310U LED TV One year old TV

Power Board pk101w11101

Plugged in this Tv, heard an Arcing sound and everything died.

Opened it up, and found

5 amp fuse blown
U501 (str6069h chopper) had exploded.
Q601 (TK12A50D Mosfet )shorted
ZD503 (16 Volt Zener) shorted
U102 ??? Cant identify
I replaced all these, and fired it up.

Now the hi voltage 160 volts from the diode bridge is working, but otherwise the set is dead.
Found there is no 5 volt startup voltage.. traced the...

Re: New Members - please post your introductions here

Hi... I'm Mhound.. Live in Langley, BC Canada.... retired electronic tech. Trying to get up to speed on flat screen tv's.. Really tough to find service info. Want to ask a question in the TV servicing forum, so will see you there once I am activated.

Mhound