|
Home | Forums | Rules | Articles | diyAudio Store | Blogs | Gallery | Wiki | 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 |
![]() |
#1 |
diyAudio Member
Join Date: Oct 2010
|
![]()
I've got another one of these amps in for repair. This one dropped it's internal screen and shorted out the power supply - I hope just the power supply.
After testing, the following pieces need to be replaced: 6x Fairchild 75344G power supply fets (Q5, Q6, Q7, Q8, Q11, and Q??) 6x 22.1ohm fet gate resistors (R30, R29, R23, R25, R28, R24) At most, 4 of driver transistors which i cannot exactly read their values (Q1, Q2, Q3, Q4). Some of these may be OK, but at least two of them split and blew chunks. 1. Having trouble sourcing the 75344Gs. Any subs or places of suggestion? 2. I dont know exactly precisly Q2/Q2/Q3/Q4 is other than looking on the DVD at a Power 2000. Is Q3 a 2G and Q4 a 1G? What about Q1 & Q2? The bigger question is what else commonly goes when the screen drops? i cannot find much else wrong other than this amp's ps. Thanks! |
![]() |
![]() |
#2 |
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
Octopart Part Search
When the screens fall in, they can do all sorts of damage. Sometimes it's difficult to find. Hopefully yours just caused the supply to fail. You need to reinstall the screen but this time use goop or another good adhesive to make sure that it doesn't fall again. On every amp like this that you repair, you should apply adhesive to make sure that the screen cannot fall. Email me if you want the diagram. You can easily determine if the driver transistor is an NPN or a PNP. The collector of the PNP will be connected directly to ground.
__________________
Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
![]() |
![]() |
#3 |
diyAudio Member
Join Date: Sep 2009
Location: Wisconsin
|
Fairchild shows stock of the HUF75344G (173)
|
![]() |
![]() |
Thread Tools | Search this Thread |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Rockford Power BD1000.1 | Dr Zeus | Car Audio | 20 | 3rd May 2012 06:12 PM |
Rockford Fosgate Power 20001 bd amplifier power rating?? | pachoorion | Car Audio | 8 | 8th May 2011 10:49 PM |
Rockford Fosgate Power 360a2 | seankane | Car Audio | 219 | 26th April 2011 07:37 AM |
Rockford Power 500.2 Amp Troubleshooting power supply. | kds9591 | Car Audio | 6 | 3rd September 2008 03:09 AM |
RF T1001BD toast | triniphen | Car Audio | 8 | 18th October 2007 01:59 AM |
New To Site? | Need Help? |