Rockford fosgate punch 45 no output

chipper · 13th October 2011, 11:47 PM

I have here my very first punch 45 mosfet amplifier. It won't play anything just bits of static with some music hardly. I have to turn up my source to actually hear anything but it's just big loud partial static with very little music. One channel had a shorted output labled "TP3055A" it's by motorola. Anyone have an idea what's causing the other channel not to play right? I checked the driver transistors and some resistors. Thanks guys

Perry Babin · 14th October 2011, 12:02 AM

Which revision?

If you're not sure, post a photo.

chipper · 14th October 2011, 12:19 AM

Okay give me a sec.

chipper · 14th October 2011, 12:27 AM

here ya go

Perry Babin · 14th October 2011, 12:34 AM

Do you have both positive and negative 15v on the power supply pins of all 3 op-amps?

chipper · 14th October 2011, 12:59 AM

How do you measure it? Is it the side with the line/circle?

Perry Babin · 14th October 2011, 01:05 AM

Pins 4 and 8 (see image below). Check all 3 op-amps.

chipper · 14th October 2011, 04:46 AM

Meanwhile I look for my meter again..... Are there any subs for the MTP3055A?

Perry Babin · 14th October 2011, 05:09 AM

I'd use an IRF540.

chipper · 14th October 2011, 05:10 AM

I assume MTP12P05 = IRF9540?

13th October 2011, 11:47 PM	#1
chipper diyAudio Member Join Date: Oct 2008	Rockford fosgate punch 45 no output I have here my very first punch 45 mosfet amplifier. It won't play anything just bits of static with some music hardly. I have to turn up my source to actually hear anything but it's just big loud partial static with very little music. One channel had a shorted output labled "TP3055A" it's by motorola. Anyone have an idea what's causing the other channel not to play right? I checked the driver transistors and some resistors. Thanks guys __________________ Feel the PUNCH

14th October 2011, 12:02 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Which revision? If you're not sure, post a photo. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

14th October 2011, 12:19 AM	#3
chipper diyAudio Member Join Date: Oct 2008	Okay give me a sec. __________________ Feel the PUNCH

14th October 2011, 12:34 AM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Do you have both positive and negative 15v on the power supply pins of all 3 op-amps? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

14th October 2011, 12:59 AM	#6
chipper diyAudio Member Join Date: Oct 2008	How do you measure it? Is it the side with the line/circle? __________________ Feel the PUNCH


	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

14th October 2011, 04:46 AM	#8
chipper diyAudio Member Join Date: Oct 2008	Meanwhile I look for my meter again..... Are there any subs for the MTP3055A? __________________ Feel the PUNCH

14th October 2011, 05:09 AM	#9
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I'd use an IRF540. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

14th October 2011, 05:10 AM	#10
chipper diyAudio Member Join Date: Oct 2008	I assume MTP12P05 = IRF9540? __________________ Feel the PUNCH

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rockford Fosgate Punch 800a2	seankane	Car Audio	3	25th June 2011 05:18 AM
Rockford Fosgate Punch 200ix	seankane	Car Audio	2	4th June 2011 01:02 AM
Rockford Fosgate Punch 200IX	seankane	Car Audio	64	12th May 2011 12:48 AM
Rockford Fosgate Punch 400a4	seankane	Car Audio	62	14th April 2011 06:38 AM
rockford fosgate punch z	stevena2006	Car Audio	2	23rd December 2009 04:20 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read