|
|||||||
| Home | Forums | Rules | Articles | diyAudio Store | Blogs | Gallery | Wiki | Register | Donations | FAQ | Calendar | Mark Forums Read |
  |
|
|
|
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 |
4th December 2020, 02:22 PM
|
#1 |
|
diyAudio Member
Join Date: Mar 2005
Location: CA
|
Rockford Fosgate Punch 600a4
I got another 600a4 that needs repair. It "powers on" but only to illuminate the LED - it only draws 0.05A (same as when only remote is given power) and doesn't fully power up. No shorted FETs and no visible damage.
TL494 reads... Pin 1: 40.4mV Pin 2: 4.55V Pin 3: 58.9mV Pin 4: 99.5mV Pin 5: 1.487V Pin 6: 3.367V Pin 7: 0.9mV Pin 8: 12.65V Pin 9: 4.92V Pin 10: 4.92V Pin 11: 12.66V Pin 12: 12.66V Pin 13: 4.96V Pin 14: 4.96V Pin 15: 4.96V Pin 16: 0.5mV Any pointers on what to look at? Only getting millivolts at the power supply FET gate legs. |
|
|
4th December 2020, 08:11 PM
|
#2 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
It would appear that you have a blown driver section if the voltage from pins 9 and 10 of the 494 isn't reaching the gate resistors. I'm assuming that you checked the gate resistors.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version. |
|
|
| Thread Tools | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Rockford Fosgate Punch 600a4 | objext | Car Audio | 76 | 5th October 2020 07:31 PM |
| Rockford punch 600a4 | rhempz01 | Car Audio | 20 | 26th June 2018 11:47 PM |
| Rockford Fosgate 600a4 | S Merlington | Car Audio | 4 | 3rd February 2016 04:41 AM |
| Rockford Fosgate 600A4 | S Merlington | Car Audio | 3 | 29th August 2015 06:48 AM |
| punch 600a4 | Hexhclass | Car Audio | 26 | 29th September 2011 06:01 PM |
| New To Site? | Need Help? |
