Very Sick Lenze 534 Controller

**Mad Professor** · 17-09-2012

New transformer has been fitted but not yet tested, and I also found that C6 (.47J100) {470nF 100V Polyester Capacitor} has also failed, so that will need to be replaced.

I also don't trust the looks of C5 (4.7uf 63v Electric Capacitor) so I am also going to replace that.

**Ricardoco** · 18-09-2012

Hey Buddy, You do what you think is best, If it saves me replacing the unit im up for it, and even if it turns out to be dead all we can do is try.

Rick

**Mad Professor** · 27-09-2012

Small update.

Here is the Lenze 534 Controller before repair.

And again after repair.

Looks much better, but not yet tested.

**i2i** · 27-09-2012

i can see whats wrong with it....

**Ricardoco** · 28-09-2012

Originally Posted by i2i

i can see whats wrong with it....

LOL if its not the missing fuse then tell LOL

**i2i** · 28-09-2012

damn you've spotted it, ......lol.....

seriously though, behind the middle pot and the add in card there looks like a fuse (small reddish brown cylinder), which has been changed for a capacitor. I may be wrong on the fuse but it looks like one.

**Mad Professor** · 28-09-2012

Here is the list of parts that I have replaced.

T1 - 2x15VAC 1.8VA Transformer.
C2 - 470uf 35v.
C4 - 470uf 35v.
C5 - 4.7uf 63v.
C6 - 47uf 35v.
C7 - .47uf (470nF) 100v.

**irving2008** · 28-09-2012

But does it work??? Have you tried powering it up and seeing if you get reasonable volts in the obvious places?

**Mad Professor** · 28-09-2012

I have tested it as far as I can without having the DC motor to test it with.

Will know more once Ricardoco gets it back middle of next week, and connects it up.

**i2i** · 30-09-2012

i just had a mate look at the photo and he says although it looks like a fuse, it also looks like a cap. If it says C? on the board then it will be a capacitor.