|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
  |
|
|
|
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 |
 |
|
|
Thread Tools | Search this Thread |
10th November 2006, 06:57 PM
|
#1 |
|
diyAudio Member
Join Date: Nov 2006
|
MTX Thunder 6500D does not power up
Hi,
I blew my amp last week. (short circuit on the output speaker  )I see that the four 75339P were smoke. I changed all four with IRF3205 and now the amp doesn't want to turn on. Did someone have an idea if I have something else blew? Thanks, |
|
|
10th November 2006, 08:47 PM
|
#2 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
Post a list of the DC voltage on each of the 16 pins of the TL494.
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
|
|
|
11th November 2006, 01:29 AM
|
#3 |
|
diyAudio Member
Join Date: Nov 2006
|
Here's the DC voltage of the TL494
PIN #1 : 0 PIN #2 : 0 PIN #3 : 0.06v PIN #4 : 1.15v PIN #5 : 0 PIN #6 : 0 PIN #7 : 0 PIN #8 : 11.5v PIN #9 : 0 PIN #10 : 0 PIN #11 : 11.5v PIN #12 : 11.6v PIN #13 : 5v PIN #14 : 5v PIN #15 : 5v PIN #16 : 0 The LED that show the power on wasn't on! 
|
|
|
|
11th November 2006, 02:36 AM
|
#4 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
The IC has input power on the right pins but 5 and 6 should not be near 0v. Pin 6 should be ~3.7v and pin 5 should be ~1.5v. If those are accurate readings and nothing is shorting those pins to ground, the IC looks like it's damaged. In most cases, when the IC is damaged the 5v reg is off but yours is dead on.
With no power appled to the amp, set your meter to ohms and measure the resistance between pins 7 and 6 and then between 7 and 5.
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
|
|
|
11th November 2006, 06:36 PM
|
#6 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
I think the IC has failed.
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
|
|
|
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| MTX 6500D - No Output | Pioneer621 | Car Audio | 112 | 16th February 2012 03:16 AM |
| MTX 6500d Parts | weston_sagle | Car Audio | 19 | 21st September 2010 08:44 PM |
| MTX Thunder 6500D burnt | ifrythings | Car Audio | 10 | 18th April 2008 05:35 AM |
| MTX 6500D repair | bil | Car Audio | 3 | 29th May 2006 06:19 AM |
| Thunder and lightning. In | jleaman | Everything Else | 3 | 8th July 2003 07:12 AM |
| New To Site? | Need Help? |
