Anyone know what the part number is for the driver IC's in this ?
All of the outputs are shorted IRFB5615
The drivers IC's are marked
ANAVIEW.COM C1
047P
C B6W5
They are a 16 pin IC and there are 2 of them Not sue on the part number for theese
Anyone know what the part number is or what replacement IC'S will work in this amp?
All of the outputs are shorted IRFB5615
The drivers IC's are marked
ANAVIEW.COM C1
047P
C B6W5
They are a 16 pin IC and there are 2 of them Not sue on the part number for theese
Anyone know what the part number is or what replacement IC'S will work in this amp?
This amp uses 8 outputs 3 were defective out of. 8
I removed the 3 defective ones and tested the remaining 5 for shorts or leaking..
All tested good I checked all resistors and solder connections all seem fine
I put the. 5 back in the amp and powers it up and it keeps blowing outputs so I'm assuming the driver ic's are defective
I removed the 3 defective ones and tested the remaining 5 for shorts or leaking..
All tested good I checked all resistors and solder connections all seem fine
I put the. 5 back in the amp and powers it up and it keeps blowing outputs so I'm assuming the driver ic's are defective
Using a current limiter and having the FETs clamped should have prevented blowing the FETs.
Pacparts doesn't have the ICs listed. Contact them to get a price. If they're expensive, I'd spend time checking the ICs more thoroughly (finding the high and low-side supply pins and checking continuity between those pins and the corresponding output pins for the IC).
I've also seen FETs (that were in an amp where other FETs failed) check OK with a meter but fail when driven at high frequency. If the ICs are expensive and they check OK after you find the pins listed above, I'd try a set of new FETs.
Pacparts doesn't have the ICs listed. Contact them to get a price. If they're expensive, I'd spend time checking the ICs more thoroughly (finding the high and low-side supply pins and checking continuity between those pins and the corresponding output pins for the IC).
I've also seen FETs (that were in an amp where other FETs failed) check OK with a meter but fail when driven at high frequency. If the ICs are expensive and they check OK after you find the pins listed above, I'd try a set of new FETs.
Put new outputs in the amp ..
Amp powers up and idlees perfectly I have + - rail voltages
I also have + - 15 volts on the op amps..
Amp has no output at all..
Any ideas on where to go from here?
Amp powers up and idlees perfectly I have + - rail voltages
I also have + - 15 volts on the op amps..
Amp has no output at all..
Any ideas on where to go from here?
What is the question that you've been asked for virtually every class D amp that didn't have output?
i do not have rail to rail oscillation ..
Wondeing since i dont have rail to rail oscillation what should i check?
Wondeing since i dont have rail to rail oscillation what should i check?
Without a service manual or a datasheet on the driver ICs, I don't have any other suggestions. You may be able to get the service manual from PacParts but there's no guarantee that that will be enough to successfully repair it.
Im gonna call Alpine tommrow and see if the IC's are avaible..
Pins 9 and 10 of 1 IC read 22 ohms between the pins
The other IC that is the same part number reads in the mega ohms
So im guessing that the IC's are defective..
Pins 9 and 10 of 1 IC read 22 ohms between the pins
The other IC that is the same part number reads in the mega ohms
So im guessing that the IC's are defective..
Did you ever get the service manual for this? I have the exact same issue. No oscillation.
If there is no load at the speaker terminals, you see clean audio, it collapse when a load is attached.
If there is no load at the speaker terminals, you see clean audio, it collapse when a load is attached.
The color bands on MELF Zener diodes are not reliable to identify their values.
Is this amps the same as the MRP-M1000? In the MRP-M1000, ZD4901 is a 12v Zener. Photos at link below.
Basic Amplifier Repair
Is this amps the same as the MRP-M1000? In the MRP-M1000, ZD4901 is a 12v Zener. Photos at link below.
Basic Amplifier Repair
ZD4901 is a 12 volt zener diode..
Mine was shorted also replaced it but it still reads shorted on the board..
So i gotta figure out what is making it read shorted when in the board..
Mine was shorted also replaced it but it still reads shorted on the board..
So i gotta figure out what is making it read shorted when in the board..
I have an mrx-m110 here that I replaced the outputs and driver IC's in also replaced ZD4901 but can't get the amp to oscillate ..
ZD4901 reads shorted in the board
ZD4901 reads shorted in the board
What was the outcome of this? Which parts needed to be replaced to get the amp to oscillate and where did you source drivers?
PacParts sells what looks to be the driver IC for nearly $28 USD plus shipping.
Assuming it's similar to the MRV-M500's I've been fixing- you can expect a bad driver IC on any bank with failed outputs in addition to bad resistors, transistors and maybe even a diode between the drive IC and outputs. I've had two with failed 12v zener diodes that kept the low side drive pulled low even with a good IC.
If it's not similar, feel free to disregard all of the above. I couldn't find any pictures or drawings to compare with.
Assuming it's similar to the MRV-M500's I've been fixing- you can expect a bad driver IC on any bank with failed outputs in addition to bad resistors, transistors and maybe even a diode between the drive IC and outputs. I've had two with failed 12v zener diodes that kept the low side drive pulled low even with a good IC.
If it's not similar, feel free to disregard all of the above. I couldn't find any pictures or drawings to compare with.
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I got this same amp doing the exact same thing as this thread is listing. I have a service manual for an MRX-M100 which appears to be relatively the same. That diagram you've posted is similar to what I have.
I'm also finding three outputs that are short. The driver IC's are suspect as the service manual I have lists all the voltages for all the pins and what I've got for outputs on the pins are massively out of spec.
The whole thing is SMD and a lot of the parts are soo small. My next step at this point is to inject audio and start following it. I'm just wondering at this point for this threads repair, which sections of the amp needed the most attention. FETS, drivers, gate resistors, and ?
However, I will check the zener diodes between the driver section and the outputs.
I'm also finding three outputs that are short. The driver IC's are suspect as the service manual I have lists all the voltages for all the pins and what I've got for outputs on the pins are massively out of spec.
The whole thing is SMD and a lot of the parts are soo small. My next step at this point is to inject audio and start following it. I'm just wondering at this point for this threads repair, which sections of the amp needed the most attention. FETS, drivers, gate resistors, and ?
However, I will check the zener diodes between the driver section and the outputs.
Please don't post in a repair thread that was started by someone else unless you are trying to help them.
Start a new thread if you need help with a repair of your own.
Start a new thread if you need help with a repair of your own.