DB Technologies T4 smps + amplifier schematic

[diydidi]

Hi I desperately need schematic for this unit. Its Italian and made by same company that did RCF.

[sentim]

Describe the problem?

[diydidi]

Hi sentim.
Problem is it doesnt switch, but sometimes it does. no dry joints!!!
Narrowed problem down to Q10 on smps controller board. Thing is I dont know what this component is. Its 3 pin smd device. Markings have faded.

[Jazz P Bass]

Try to make an informed guess.
(An Infoguess?)
Is the device NPN or PNP?
What package size is it?
What voltages and/ or currents is the device expected to see?
Draw a brief schematic of where the leads go & what they are connected to.

[sentim]

diydid Take a picture of what you want to know...

[diydidi]

Hi Sentim here is a photo of controller board. The device in question Q1, has been taken out. It doesnt test like any component ive seen before. Thats why I believe its faulty.

[sentim]

Hi diydidi, is a component of a digital transistor BCR135 http://www.datasheetcatalog.org/data...r135series.pdf

[diydidi]

Hi diydidi, is a component of a digital transistor BCR135 http://www.datasheetcatalog.org/data...r135series.pdf

Fanx dude!!!

[Jazz P Bass]

Wow.
I never saw a transistor like that.
Yeah, I guess those bias resistors (10K & 47K) would throw off any "normal" diode checks.
Crazy pulse graphs, that's for sure.