1290 Smoking r56

[aquitania]

Hi Everyone,
I've just completed a single ez1290 and I've got a smoking resistor. it's the 12 ohm 1 watt r56.
I was wondering if someone could give me a voltage reading across it?

I've got a 10 ohm and 2.2 (both 1 watt) wired in series cause I didn't have a 12 ohm.

From 23.9 volt supply i get a 2 volt drop across the 2.2 ohm and a 9 volt drop across the 10 ohm. These figures seem high to me, and it's apparent why they are smoking:
P= V^2/R = 81/10 = 8 watts. which is much higher than the rated power dissapation.

Could someone give me a reading?

Thanks so much!!

 

[Walrus]

C7/8 wired backwards or short??
You gotta short somewhere anyhows!

 

[useme2305]

you should post this in the big 1290 thread cause i think many people have subscribed that thread and are willing to respond.

http://www.groupdiy.com/index.php?topic=22828.0/new/?topicseen#new

 

[aquitania]

Double checked my E Caps, all look good, it's probably something simple, a voltage reading would get me on the right track though.

I'll post on the other thread and see what happens, thanks for the suggestion!

 

[aquitania]

There was an internal short in some shielded wire, problem solved. Mods can delete the thread, don't want to waste space