Quick question... - Page 2 - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 27th March 2007, 08:37 PM   #11
WackiCO is offline WackiCO  United States
diyAudio Member
 
Join Date: Jan 2007
Location: Parker, CO
Ok, is there an easy fix that would decrease the stress that the fan puts on the remote output from the head unit?? The fan is currently moving a LOT of air through the amp, so i dont beleive that slowing this down would have much of an effect...
__________________
WackiCO
  Reply With Quote
Old 27th March 2007, 08:38 PM   #12
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Yes you should use the remote wire to turn on a transistor or relay, which then switches your fan power.

Just disconnect the fan for now and see if that makes the amp work again.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 27th March 2007, 09:29 PM   #13
WackiCO is offline WackiCO  United States
diyAudio Member
 
Join Date: Jan 2007
Location: Parker, CO
Ohh, I am not thinking that the amp is not working, I replaced that with an amp that works and still am not having any sound go through, the problem i beleive has to lie with either the RCA cable or with the sub....Here is a list of all i have checked

-Head unit - Changed it out w/ working one
-Amp - Changed it out w/ working one
-there is 12v to power port on the amp, as well as the remote port
-there is a voltage coming through the speaker terminals
-I replaced the speaker wire in case something was wrong with that
-checked the connections inside the box to the speaker, everything is ok

Can you think of anything else I should be checking besides the speaker and the RCA Cable??
__________________
WackiCO
  Reply With Quote
Old 27th March 2007, 09:39 PM   #14
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
I was just wondering if the fan was loading the remote out too much, making the voltage drop. Still enough to drive the fan but not enough to turn on the amp. Long shot but worth a try.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 28th March 2007, 03:42 AM   #15
WackiCO is offline WackiCO  United States
diyAudio Member
 
Join Date: Jan 2007
Location: Parker, CO
Ok, so i removed the fan from the amp and still nothing worked, However, when i did check the sub terminals for the ohms, it comes up at OL (or doesnt measure anything) when i think that it is supposed to show about 4 ohms....

I am guessing this means my speaker is blown??

I also took a minute and hooked up a speaker I have lying around to the amp and it played...
__________________
WackiCO
  Reply With Quote
Old 28th March 2007, 04:11 AM   #16
Clipped is offline Clipped  Thailand
diyAudio Member
 
Join Date: Mar 2005
Location: home
Send a message via MSN to Clipped
pioneers have small ground planes....after a while the traces become weak then poof!ten you get that zzzzzzzzzz wining sound...only cure is to ground the rca to hu chassis.

sounds like your sub is blown, but check the tinsel leads first, if you can look at the coil through the ventiation holes, you may be able to see if the voice coil has become unwound.

you really should put a relay on the fan, or wire it to a main power wire and put a switch on it.

or get a fan that draws no more than 0.15 amps a 0.34 would be pushing it.
  Reply With Quote
Old 28th March 2007, 02:54 PM   #17
WackiCO is offline WackiCO  United States
diyAudio Member
 
Join Date: Jan 2007
Location: Parker, CO
I checked the leads and they appear to be ok, and I'll also work on getting that little wire on the RCA attached to the chassis of the head unit, but where do i attach the other end to?? Do i just put it on ground on the amp or screw it to the chassis of the amp as well??

Thanks very much for your help, I really appreciate it.
__________________
WackiCO
  Reply With Quote
Old 28th March 2007, 03:22 PM   #18
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
RCA shield grounds on Pioneer head units...

Pioneer intentionally fuses the RCA shield. This prevents a fire hazard if the RCA shield ground contacts the main power wire. This is very common. People pull an amp and leave the uninsulated power wires near the RCA cables in the rear of the vehicle. One touch for a tiny fraction of a second will open the shield.

I've also seen shorted transformers (shorted primary to secondary) cause the shield protection to open.

In the past, they used a thin trace as a fuse. Now they use a real (replaceable) fuse.

When the main power wire shorts to solidly grounded RCA cable, the shield of the cable will burn just like an unfused power wire.

The copper foil/trace is covered with solder mask and can not deteriorate any more than the rest of the traces.

If you ground the RCA shields to the head unit chassis, I strongly recommend that you fuse the jumper wire you use to connect the two grounds.
  Reply With Quote
Old 28th March 2007, 03:41 PM   #19
Clipped is offline Clipped  Thailand
diyAudio Member
 
Join Date: Mar 2005
Location: home
Send a message via MSN to Clipped
ahhh very cool, i knew i wasnt the only person that noticed this about pioneers...

WackiCO...you have to solder a wire from the outer ring(shield) of the rca jack to the HU chassis, you can find a suitable screw (usualy the one dead center on the back) and use a ring connector to fasten it....

and put a fuse on it like Perry said (fuse is new to me)

if its not making that wining zzzzzzz sound, you probably dont have to do it....'yet' ....
  Reply With Quote
Old 28th March 2007, 08:05 PM   #20
WackiCO is offline WackiCO  United States
diyAudio Member
 
Join Date: Jan 2007
Location: Parker, CO
Will do, and thanks again guys for all your help, I was about to start drop kicking everything in sight when i couldnt figure out what was wrong with this over the weekend....
__________________
WackiCO
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Quick question on the PP-C1 amp athos56 Tubes / Valves 13 20th October 2007 06:37 PM
Quick quick question ! guitvinny Pass Labs 6 7th February 2007 04:20 PM
Quick PCB question Piper Chip Amps 2 7th March 2005 10:59 AM
VERY quick question... Wyloch Multi-Way 2 3rd March 2005 04:34 PM


New To Site? Need Help?

All times are GMT. The time now is 11:15 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2