pioneer deh-p8500mp - 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 6th August 2007, 07:19 PM   #1
pgcan is offline pgcan  United States
diyAudio Member
 
Join Date: Aug 2007
Send a message via AIM to pgcan Send a message via MSN to pgcan Send a message via Yahoo to pgcan
Default pioneer deh-p8500mp

hello

i need help i brought this unit and when i hooked it up no sound can out of the speakers and then it started smoking and got real hot now there is nothing what can it be i need help
  Reply With Quote
Old 6th August 2007, 08:29 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
It sounds like the power amplifier IC has failed. It could have been defective when you got it or you could have allowed a wire to short to ground or another wire. This is common.

It's been a while since I've repaired head units but I'm sure someone can tell you if it's an easy repair. Sometimes the mechanisms for the faceplates make the job more difficult.

Some of these head units used a power amp IC with a high side drive. The HSD was used as a remote turn on. If this one uses the output of the IC to drive the remote output, you should get the part from Pioneer. Some of the replacement ICs didn't have the HSD feature and therefore the remote won't work.
  Reply With Quote
Old 6th August 2007, 09:03 PM   #3
pgcan is offline pgcan  United States
diyAudio Member
 
Join Date: Aug 2007
Send a message via AIM to pgcan Send a message via MSN to pgcan Send a message via Yahoo to pgcan
thanks i hope some one can tell me if this is easy i have the unit already taken apart i just need to know which is the IC amp i really want to use this radio
  Reply With Quote
Old 6th August 2007, 09:12 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If you have the main board out of the bottom cover/shell, look at the back of the head unit (or wherever the heatsink is) and there will be a large IC with 20 or so pins. That's the power amp. Generally they will be discolored and cracked. You may have to pull the metal frame off of the main board to get the old IC out and the new IC in.

You'll need a desoldering pump or desoldering braid and a good soldering iron to change the IC.

Since it had no power, check the main fuse. If it's not blown, you may have burned/open traces on the circuit board.
  Reply With Quote
Old 6th August 2007, 09:20 PM   #5
diyAudio Member
 
Join Date: Mar 2007
You can get the replacement part from Pacific Coast Parts. The

part number is BA3834F

Their phone number is 1-800-421-5080

I do not remember where the IC is mounted on that radio, but it should not be real hard to locate. Just follow the traces on the bottom of the circuit board from the plug to the chip.
__________________
If it ain't broke Don't fix it
  Reply With Quote
Old 6th August 2007, 10:07 PM   #6
pgcan is offline pgcan  United States
diyAudio Member
 
Join Date: Aug 2007
Send a message via AIM to pgcan Send a message via MSN to pgcan Send a message via Yahoo to pgcan
i looked at the board the fuse blew and i also have burned tracks on the side where i took off a big black box 2 of the tracks were burned i can see that.

so are you saying that the ic amp is on the board
i might have to take it to a repair shop because i dont have the tools to fix it i hate to have to pay a lot to get this fixed

but like i said i have the board out
  Reply With Quote
Old 7th August 2007, 09:29 PM   #7
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If the remote is not taken from the power amp IC, you can clip the leads from the board (as close as possible to the board with flush cutting pliers) and repair any traces that are needed to get the head unit to power up.

If the remote output is taken from the power amp IC, it needs to be replaced for the head unit to operate properly.

The yellow arrow in the attached photo is pointing the the power amp IC. This is not the same head unit you have but it should be similar.
Attached Images
File Type: jpg img_2766c.jpg (84.1 KB, 63 views)
  Reply With Quote
Old 7th August 2007, 09:52 PM   #8
pgcan is offline pgcan  United States
diyAudio Member
 
Join Date: Aug 2007
Send a message via AIM to pgcan Send a message via MSN to pgcan Send a message via Yahoo to pgcan
Thanks for that help i will look for it
  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
Pioneer SX-780 aaronlubelski Solid State 8 25th May 2005 06:24 AM
pioneer DEX-77 enfield48j Car Audio 1 25th March 2005 08:11 PM
pioneer pd-s 703 Raj1 Digital Source 2 25th August 2003 10:52 PM


New To Site? Need Help?

All times are GMT. The time now is 02:13 PM.


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