Xantia Blower Controller (quick question)

Stunned Monkey · Post by **Stunned Monkey** » 26 Nov 2010, 15:28

Yep, mine has decided to run at full speed regardless off the settings. I've found the guide on replacing the transistors and have ordered them from Farnell but what isn't obvious (and to save myself rolling around in the footwell before I actually have to), where exactly is the control module? Attached to the motor?

Cheers!

davetherave · Post by **davetherave** » 26 Nov 2010, 15:40

Have a look at this link for removal of module

http://www.club-xm.co.uk/forum/viewtopi ... tor#p10790

Then Jims guide here

http://www.frenchcarforum.co.uk/forum/v ... transistor

Stunned Monkey · Post by **Stunned Monkey** » 27 Nov 2010, 12:05

I can't view the XM forum - any chance you could post it here please?

atr · Post by **atr** » 27 Nov 2010, 12:22

Afaik - the module is installed on the motor. you have to dimantle the motor (not a big deal) and then you will gain access to the module.

davetherave · Post by **davetherave** » 27 Nov 2010, 12:41

Heres the post in full:

Heres the pics from my disasembly, i replaced the transistors, I was going to do the brushes but mine still have a fair amount of life in them!

This is the removed motor obviously...
Where the cables go into the side of the plastic casing remove it (i did not realise that this could be done as shown in later pictures)

.

This on below shows on of the three holes where you will need to insert a flat head screw driver and gently prise up the rubber blocks (i found going round doing each one a bit at a time to be best.) whilst pulling up gently on the blades.

Below is the removed motor with blades attached and the attached wires i should have removed.

The next picture shows my seriously corroded heatsink with transistors attached. I contacted Sir Jim of the FCF who was able to supply replacement ones.

This board will need removing, mine was so corroded i had to drill the screws out, hopefully yours will not be this bad!
Now the fun bit, with a suitable sized drill bit remove the rivets holding the transistors in place, then turn the board over and using a soldering iron and solder sucker remove the solder holding the transistors in place and wiggle them free!

Then clean the area the that the transistor sat on and apply some heatsink paste to the new transistors (only a relatively thin layer) and place the transistors in position. This can be very fiddly and i had to use the soldering iron as well to clear the way through.
Then use two (M3.5 i think) bolts to secure each transistor, sadly i did not have the correct ones and had to improvise. Then solder them in position
Here is the picture of the new transistors in situ.

Then simply reassemble and hope it works...
There you have it, hope that helps and i hope your transistors do not need replacing

Thats the post, not sure if it will display properly.....

Post by **CitroJim** » 27 Nov 2010, 16:48

Looks excellent to me Dave

Just a note, often it's unnecessary to remove the motor complete. It'll flex in its housing just enough to allow the module to pop out after undoing it's mounting screws...

Very important to solder the transistors AFTER mounting them and tightening the screws otherwise strain can be out on the circuit board and it may not earth to the heatsink correctly...

davetherave · Post by **davetherave** » 27 Nov 2010, 18:39

Quite right, the reason i removed the motor as well, was to check the condition of the brushes whilst I was at it!

Stunned Monkey · Post by **Stunned Monkey** » 28 Nov 2010, 12:44

Guys, that's absolutely brilliant. Trannies are already on their way from Farnell.

THANKS!

Xaccers · Post by **Xaccers** » 28 Nov 2010, 17:31

Stunned Monkey wrote:Guys, that's absolutely brilliant. Trannies are already on their way from Farnell.

THANKS!

Be sure to order the right ones!

Post by **CitroJim** » 28 Nov 2010, 17:45

I once heard of a case on a vintage wireless forum I once frequented where a young lad couldn't access said forum because the parental controls set up on his firewall would not allow anything containing the word "tranny"..

Unfortunate as years ago the term "tranny radio" was in very common usage. Everyone had one.

The forum in question had to issue an edict that henceforth the word tranny could not be used as a diminutive of transistor.

Clogzz · Post by **Clogzz** » 29 Nov 2010, 14:03

the word tranny could not be used as a diminutive of transistor

We trogs used it as a diminutive of transformer.

Post by **CitroJim** » 29 Nov 2010, 16:40

Clogzz wrote: We trogs used it as a diminutive of transformer.

Yes, I'd forgotten that one! In the TV trade we used to speak of Line Output Trannies. Easier than trying to make a pronounceable word out of LOPT...

Post by **myglaren** » 29 Nov 2010, 17:17

We always called photographic transparencies Trannies too.
Was never really comfortable with it

Post by **CitroJim** » 29 Nov 2010, 17:44

myglaren wrote: Was never really comfortable with it

I can understand that Steve. "Come in and see the trannies I took on Holiday!" might well raise a few eyebrows...

addo · Post by **addo** » 29 Nov 2010, 18:47

No sense of adventure!