1991 LS400 Radio not working - ClubLexus - Lexus Forum Discussion

Notices
LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

1991 LS400 Radio not working

Reply

 
 
 
Old 10-14-16, 11:37 AM
  #1  
BigBernice
Driver School Candidate
Thread Starter
 
BigBernice's Avatar
 
Join Date: Oct 2016
Location: Georgia
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default 1991 LS400 Radio not working

Hello all,
I just picked up my UCF10 and my nakamichi radio is not working. Yes I have searched and looked at multiple pages on the issue but I have some differences.
On my car I can turn on the radio and you can hear a pop from the sub and speakers. I get this same thing when I change from am to fm or any of the presets. But when I turn of the volume I get nothing. If I leave the radio on I start getting a wahhhwahhh sound after a few minutes. I have disconnected the factory phone system in the trunk. Any ideas what it could be? And is the amp for the speakers built into the radio?
BigBernice is offline  
Reply With Quote
Old 10-14-16, 12:55 PM
  #2  
dicer
Lexus Champion
 
Join Date: Jul 2010
Location: wa
Posts: 4,346
Thanked 58 Times in 55 Posts
Default

I've read that the amp for the nakamichi powers all the speakers, on the pioneer the head unit powers the speakers except for the amp in the trunk for the sub woofer.
I found a write up about how the FET's go bad in the amplifier and it of course won't work, its a matter of replacing them and all is supposed to be good then. But of course with anything electronic it could also be something else too. I would think that just like the ecu that the LS sound system could suffer from the bad capacitor syndrome too.
dicer is offline  
Reply With Quote
Old 10-14-16, 01:02 PM
  #3  
dicer
Lexus Champion
 
Join Date: Jul 2010
Location: wa
Posts: 4,346
Thanked 58 Times in 55 Posts
Default

https://www.clublexus.com/forums/lex...michi-amp.html

Heres a link to the FET replacement diy.
dicer is offline  
Reply With Quote
 
 
 


Thread Tools
Search this Thread
Quick Reply: 1991 LS400 Radio not working


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: