Dual XDVD8181 Dead

mbates14 · 2nd February 2010, 02:10 AM

Got one of these totally dead. Troubleshooting leads me to find that U403 has pins1 and 2 shorted. contains SMD Marking of 25, although it does not match any of the codebooks out there...

Anyone know what U403 is or have schematics?

Perry Babin · 2nd February 2010, 07:32 AM

Can you post a photo of the inside of the amp?

mbates14 · 2nd February 2010, 06:50 PM

it is a dvd head unit.

Perry Babin · 2nd February 2010, 06:57 PM

Ok. I should have looked up the model number.

In most cases, those 'off-brand' head units have no tech support, no service literature and no parts available.

If you post this in the 'parts' forum here with a photo, someone there may be able to help.

mbates14 · 3rd February 2010, 01:39 AM

Yea, i figured as much. thats why i probably going to get out of attempting to repair head units, unless its a basic issue or no sound issues. otherwise, trash it.

the guy said he unhooked the ground, and let it float while doing something, and it hit something, so when he hooked it back up, its dead. Unit only has 3 pico fuses, and they test good. so something happened.

2nd February 2010, 02:10 AM	#1
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	Dual XDVD8181 Dead Got one of these totally dead. Troubleshooting leads me to find that U403 has pins1 and 2 shorted. contains SMD Marking of 25, although it does not match any of the codebooks out there... Anyone know what U403 is or have schematics?

2nd February 2010, 07:32 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Can you post a photo of the inside of the amp? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

2nd February 2010, 06:57 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Ok. I should have looked up the model number. In most cases, those 'off-brand' head units have no tech support, no service literature and no parts available. If you post this in the 'parts' forum here with a photo, someone there may be able to help. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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2nd February 2010, 06:50 PM	#3
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	it is a dvd head unit.

3rd February 2010, 01:39 AM	#5
mbates14 diyAudio Member Join Date: Jun 2002 Location: non	Yea, i figured as much. thats why i probably going to get out of attempting to repair head units, unless its a basic issue or no sound issues. otherwise, trash it. the guy said he unhooked the ground, and let it float while doing something, and it hit something, so when he hooked it back up, its dead. Unit only has 3 pico fuses, and they test good. so something happened.

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