Kenwood KAC-7202 - 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 7th September 2012, 03:05 PM   #1
diyAudio Member
 
Join Date: Jun 2012
Default Kenwood KAC-7202

This amp doesnt power up..

Heres what i have on the 494

Pin 1:2.56
Pin 2:0.53
Pin 3:4.59
Pin 4:0.32
Pin 5:1.48
Pin 6:3.62
Pin 7:0
Pin 8:13.88
Pin 9:0
Pin 10:0
Pin 11:13.88
Pin 12:13.88
Pin 13:4.95
Pin 14:4.95
Pin 15:4.95
Pin 16:0

Any thoughts?
  Reply With Quote
Old 7th September 2012, 06:38 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Remove Q610. Does that allow the amp to power up?

Be careful. This will defeat most of the protection circuits.
  Reply With Quote
Old 7th September 2012, 07:55 PM   #3
diyAudio Member
 
Join Date: Jun 2012
The power light will come on red for half a sec then goes out amp still wont power up with Q610 removed
  Reply With Quote
Old 7th September 2012, 08:58 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Desolder one leg of D613.
  Reply With Quote
Old 11th September 2012, 04:24 AM   #5
diyAudio Member
 
Join Date: Jun 2012
Do you happen to know the value of R343 its badly burnt
  Reply With Quote
Old 11th September 2012, 11:13 AM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
4.7 ohms.
  Reply With Quote
Old 11th September 2012, 12:00 PM   #7
diyAudio Member
 
Join Date: Jun 2012
Ok i replaced it and replaced 1 A965 driver that was defective..

Tripple checked the outputs out of the board and all of them test fine..

with the outputs in the amp it will draw excessive current ..

If i remove them amp powers up and idles fine..

It doesnt matter what channel the outputs are in when it draws current..

Any ideas what to check next?
  Reply With Quote
Old 11th September 2012, 12:43 PM   #8
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
In a lot of the older kenwood amps, the bias transistors would develop bad solder connections and cause the amp to draw excessive current.
  Reply With Quote
Old 11th September 2012, 12:52 PM   #9
diyAudio Member
 
Join Date: Jun 2012
Took them out of the board cleaned the pads and resolderd them back in ..

Amp still draws 40 + amps of current..
  Reply With Quote
Old 11th September 2012, 12:59 PM   #10
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Have you tried setting the bias pots fully CW or CCW? Sometimes they're designed to be adjusted from the bottom of the board so I don't know which way is down.
  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
Kenwood Kac-7202...Low distorted output. jordan_ciaramit Car Audio 1 12th August 2012 06:54 AM
Kenwood KAC 7202 mike49504 Car Audio 10 25th February 2011 11:05 PM
Kenwood 7202 mike49504 Car Audio 13 19th February 2010 08:12 AM
Kenwood KAC-X301T and KAC-X201T:Do they share the same board? spooney Car Audio 1 25th October 2007 01:08 AM
kenwood kac 7202 mike49504 Car Audio 4 17th October 2006 09:43 PM


New To Site? Need Help?

All times are GMT. The time now is 11:33 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