worcester bosch 28cdi rsf combi boiler

[sjwlifts]

If anyone has one of these boilers could you tell me the part number of the semi conductor located at T19 on the pcb, this can be found by removing the facia plate and round timer this is done by pushing in the bottom sides of the facia and pulling toward you,
Inside towards the bottom right corner just above the multiplug is a small black semiconductor T19 on top of this is a number, this is the number I am after if anyone can help ???????
Thank you...

 

[Gasguru]

The forum does not advocate diy repairs of circuit boards (especially by those with absolutely no knowledge of electronics)

Considering the price of these boards a fixed price repair from Worcester is your best bet.

 

[sjwlifts]

Good job I am qualifyed then

 

[Gasguru]

Really when you call a transistor "a three legged switching type resistor"

 

[sjwlifts]

I,ll call it a BD138 if you like, I just cant prove beyond doubt that it is..

 

[MJN]

Is your question still outstanding?

If so, BD138 is a type of PNP transistor. You can get a replacement, BD140, from Maplin - http://www.maplin.co.uk/module.aspx?moduleno=33879

They used to also stock the BD138 but the BD140 is functionally equivalent - just able to work with higher voltages.

Mathew