Repaired HUD with new capacitor, but cuts out after five min

ONLY for ADVANCED technical discussion about the 240sx!
Gatecrasher3
Posts: 17
Joined: Fri Nov 09, 2007 12:21 pm
Car: S13

Post

http://www.nicoclub.com/archives/how-to ... h-hud.html
I repaired my digital speedo using this tut^. By replacing the blown capacitor I got my digital speedo to work again, but for some reason it stops working after 3-5 minutes. my odometer and dash lights continue to work after the speedo stops (they never worked before I replaces the cap). Any idea what may be causing this? s*** cap/installed backwards?


aquariustiger
Posts: 55
Joined: Sat Mar 24, 2007 3:44 pm
Car: 1989 nissan 240sx
1991 240sx

Post

I'm not an expert on this but found this on the web,maybe it could help.

polarized capacitor
some capacitors are polarized. they can only be used one way. wiring it in backwards can cause it to explode
Did you noticed a + and a - on it , did you matched it to the board?

too much voltage
capacitors are rated to very specific maximums. generally most can take up to 35% above their ratings temporarily in events like a power surge. But they cannot operate at that voltage for too long. The capacitor would overheat, causing the electrolytic fluid to boil. If that goes on for too long, the capacitor would explode.

Could be culprit could be a sneaky power surge somewhere or the rating could be wrong.Hope that sheds some light!

Gatecrasher3
Posts: 17
Joined: Fri Nov 09, 2007 12:21 pm
Car: S13

Post

aquariustiger wrote:I'm not an expert on this but found this on the web,maybe it could help.

polarized capacitor
some capacitors are polarized. they can only be used one way. wiring it in backwards can cause it to explode
Did you noticed a + and a - on it , did you matched it to the board?

too much voltage
capacitors are rated to very specific maximums. generally most can take up to 35% above their ratings temporarily in events like a power surge. But they cannot operate at that voltage for too long. The capacitor would overheat, causing the electrolytic fluid to boil. If that goes on for too long, the capacitor would explode.

Could be culprit could be a sneaky power surge somewhere or the rating could be wrong.Hope that sheds some light!
I think that is right, will try.


Return to “240SX Technical Forum”