So my Rockford Fosgate T20001bd decided to take a **** on me for no apparent reason.
I've used the amp for about 6 years with 0 issues.
This morning I turned on my ignition and there it was.
Magic smoke
😡😡😡
I opened up the amplifier and discovered 8 blown power supply fets.
I'm here wondering what else may be damaged and if possibly i can try sourcing the parts and attempt repairing the amp myself.
I would greatly appreciate some guidance from anyone with suitable knowledge and also a schematic would be appreciated if someone can donate one.
Thanks in advance
I've used the amp for about 6 years with 0 issues.
This morning I turned on my ignition and there it was.
Magic smoke
😡😡😡
I opened up the amplifier and discovered 8 blown power supply fets.
I'm here wondering what else may be damaged and if possibly i can try sourcing the parts and attempt repairing the amp myself.
I would greatly appreciate some guidance from anyone with suitable knowledge and also a schematic would be appreciated if someone can donate one.
Thanks in advance
Diagrams:
http://www.bcae1.com/temp/rockford - powerT20001bdSCH-4755-B.zip
The learning curve on this amp will be steep. Have you ever done any repair work?
http://www.bcae1.com/temp/rockford - powerT20001bdSCH-4755-B.zip
The learning curve on this amp will be steep. Have you ever done any repair work?
Probably you have one or all audio/rail switchers shorted mosfet (and related drivers), so ps fets are burned for this reason.
No Perry i have never repaired an amplifier but my amp guy is pretty good.
I know rockford amps are a PITA to repair tho.
It seems the output transistors have also failed in the amp when tested.
With the power supply toasted and the output transistors toasted im wondering if this amp is worth the repair?
I know rockford amps are a PITA to repair tho.
It seems the output transistors have also failed in the amp when tested.
With the power supply toasted and the output transistors toasted im wondering if this amp is worth the repair?
Your amp guy? Who is going to repair it?
Have you read through the basic amp repair page?
How did you come to the conclusion that output components have failed?
Have you read through the basic amp repair page?
How did you come to the conclusion that output components have failed?
Well my amp guy checked the outputs and some if them were shorted.
His meter read .02(or something like that) when he tested the output fets
His meter read .02(or something like that) when he tested the output fets
No i did not read the page.
I'm sure gonna take a read today though.
Any specific chapters I should take a deeper look into?
I'm sure gonna take a read today though.
Any specific chapters I should take a deeper look into?
Basic Amplifier Repair
Read everything on that page and I suggest that you follow the links to the other pages of the car audio site. You don't have to read them in their entirety but you should give them a quick scan so you can go back to the information if you need it.
Read everything on that page and I suggest that you follow the links to the other pages of the car audio site. You don't have to read them in their entirety but you should give them a quick scan so you can go back to the information if you need it.
I read the page.
It appears i may need new power supply fets,gate transistors, driver transistors & driver IC?
Correct me if I'm wrong?
Apparently low voltage damaged the amplifier.
The battery under the hood was swollen and dead.
It appears i may need new power supply fets,gate transistors, driver transistors & driver IC?
Correct me if I'm wrong?
Apparently low voltage damaged the amplifier.
The battery under the hood was swollen and dead.
Low voltage rarely causes problems with amps that have low voltage protection, like this one. Low voltage can't cause the outputs to fail.
To replace the large transistors, you will need some heat source like a butane torch, a hot-air rework station or a really hot heat gun.
IT's best to have a soldering iron that has a temperature control and a thermistor for temperature sensing.
Have you ever replaced surface mount components like the gate resistors and driver transistors?
To replace the large transistors, you will need some heat source like a butane torch, a hot-air rework station or a really hot heat gun.
IT's best to have a soldering iron that has a temperature control and a thermistor for temperature sensing.
Have you ever replaced surface mount components like the gate resistors and driver transistors?
Yes I do know how to solder pretty ok.
SMD components are small but I think I can manage.
There is an area marked Q2 on the board with what appears to be 4 driver transistors.
What are the values of these 4 transistors?
Also how can I know if the 3526 IC failed?
SMD components are small but I think I can manage.
There is an area marked Q2 on the board with what appears to be 4 driver transistors.
What are the values of these 4 transistors?
Also how can I know if the 3526 IC failed?
The driver transistors are shown on the diagram posted earlier.
You will test the driver IC later.
What heat source are you going to use to replace the FETs on the MEHSA insulators?
What soldering iron do you have?
You will test the driver IC later.
What heat source are you going to use to replace the FETs on the MEHSA insulators?
What soldering iron do you have?
Spend about an hour or so searching the forum for threads on the amp you have and similar models, looking specifically for those related to replacing transistors on MEHSA insulators. Read all you find.
Ok will do.
When i order the replacement parts I would get back to the thread in about a week or so.
I hope you would still be available to help.
When i order the replacement parts I would get back to the thread in about a week or so.
I hope you would still be available to help.
I think it's a bit premature to order parts unless you have found as many of the defective parts as you can without powering it up. Post a list of all of the parts you're going to order.
Do NOT order parts from ebay.
When testing, you have to reinstall all of the screws in the board (into the bottom plate) because the screws are used to complete many of the grounds.
Do NOT order parts from ebay.
When testing, you have to reinstall all of the screws in the board (into the bottom plate) because the screws are used to complete many of the grounds.
What's up with EBay ???
That's actually where I was going to order my parts.
Also not to go off topic but my bro gave me his old mb quart raa1000 to use in the meantime .
The amp powers up fine and receives signal(clipping indicator flashes with music) but there is no sound coming out the speaker terminals.
What could it be?
Where should I check first?
Please help
I'm beginning to have withdrawals without my baseline 8-(
That's actually where I was going to order my parts.
Also not to go off topic but my bro gave me his old mb quart raa1000 to use in the meantime .
The amp powers up fine and receives signal(clipping indicator flashes with music) but there is no sound coming out the speaker terminals.
What could it be?
Where should I check first?
Please help
I'm beginning to have withdrawals without my baseline 8-(
ebay has a lot of counterfeit/second rate parts. There are a few reputable sellers but unless you know who they are, you risk getting ripped-off. Even for the good sellers, the prices aren't really any better than authorized distributors.
Please don't mix repairs in a thread. Start a new thread for the other amp and include photos of the board.
Please don't mix repairs in a thread. Start a new thread for the other amp and include photos of the board.
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