Datatek
Well-Known Member
Really? Link goes to ebay home pageThe seller on ebay explains all that .
tomcat59alan
Well-Known Member
Really? Link goes to ebay home page
Not when I opened it, showed various photo's and a " how to " for checking.
tomcat59alan
Well-Known Member
Really? Link goes to ebay home page
Try putting item number 321631899027 in Keith see what it comes up with.
Datatek
Well-Known Member
Yep, that gives the vendor. Looks a bit pricey for a couple of transistors, I'm surprised he say's they are Darlingtons, I'd assumed they were 2N3055 power transistors.Try putting item number 321631899027 in Keith see what it comes up with.
tomcat59alan
Well-Known Member
Yep, that gives the vendor. Looks a bit pricey for a couple of transistors, I'm surprised he say's they are Darlingtons, I'd assumed they were 2N3055 power transistors.
Now you've lost me.
Datatek
Well-Known Member
2N3055 cheap and cheerful power transistor, often used in motor speed control. Darlington, a 2 stage transistor, more expensiveNow you've lost me.
tomcat59alan
Well-Known Member
Never applied myself to electrickery.
Datatek
Well-Known Member
Now you've lost me.
Obviously a difference if the 2N3055s come from Darlington or Prestatyn.
tomcat59alan
Well-Known Member
Obviously a difference if the 2N3055s come from Darlington or Prestatyn.
Don't they all come from the Land of the Rising Sun ?
Don't they all come from the Land of the Rising Sun ?
Possibly, but with "Made in China" written on them.
tomcat59alan
Well-Known Member
Possibly, but with "Made in China" written on them.
Ah, the well known Prestatyn Take away.
I consider myself reprimanded and educated.......
I was just going by an instruction on RR.net looking for an easy out...... he just said a dead short between case and terminal means they're duff, I clearly need t o brush up on my electronics
Datatek
Well-Known Member
I consider myself reprimanded and educated.......
I was just going by an instruction on RR.net looking for an easy out...... he just said a dead short between case and terminal means they're duff, I clearly need t o brush up on my electronics
My comment was not intended as a reprimand
Replaced the transistors and as Keith mentioned a bit of a waste of time, I gained a little soldering/desoldering experience, but the r/h fan still ran full tilt.
With a bit of reading, I found that the fans are controlled by output voltage from the HEVAC ECU +12v no speed +6v 1/2 speed 0v full speed, this led me to reckon there was no out put voltage from the ECU
Went on RAVE and found that pins 1 and 3 on connector C245/CO7091 controlled this output. Dug out the ECU and had a fiddle and improved the contact on those pins and now the motors are back in control again.
Worth a shot if you have this problem, been avoiding this fix for ages and it took about 20mins.........especially in this weather!!
With a bit of reading, I found that the fans are controlled by output voltage from the HEVAC ECU +12v no speed +6v 1/2 speed 0v full speed, this led me to reckon there was no out put voltage from the ECU
Went on RAVE and found that pins 1 and 3 on connector C245/CO7091 controlled this output. Dug out the ECU and had a fiddle and improved the contact on those pins and now the motors are back in control again.
Worth a shot if you have this problem, been avoiding this fix for ages and it took about 20mins.........especially in this weather!!
Datatek
Well-Known Member
Good one
chopper007
Active Member
off topic a bit.. but i just turned off the AC on the unit and never had the book symbol again ( not fussed about Aircon )...
tomcat59alan
Well-Known Member
Running the A/C at all times keeps the interior damp free, minimising the chance of damage to the BECM.
