I received a JL Audio HD1200/1 that had failed and a previous repair attempt was made. The prior repair attempt involved replacing one of the IR2010s output ICs and four of the output transistors which are driven by the same replaced IC. IRF540 was used as a replacement, but FDP2532 are the originals, which are what the other four outputs are. I replaced the IR201s again, replaced the IRF540s and remaining FDP2532s with 8 new FDP2532s, the four 0.1uf capacitors by the speaker terminals, and some of the smd capacitors connected to the IR2010s.
When powered up, the capacitors located in front of, and connected to the speaker terminals burn up in dramatic fashion. I really don't know the value of the smd capacitors, and also have no idea what L4 is. I need to order these items immediately as I am finalizing an order that should ship by tonight or tomorrow.
These are the locations of the items I need identified so I can order replacements:
C93- one side to + speaker terminal, other side to GND(same as C94)
C92- each side is connected to the + and - speaker terminals
C99- each side is connected to the + and - speaker terminals
C88- one side to pin6, other side to pin7 of IR2010s
C89- one side to pin2, other side to pin3 of IR2010s
C166- one side to pin2, other side to pin3 of IR2010s
C90-one side to pin11 of IR2010s, other side to GND
L4- one side to D16 diode, other side to C15 capacitor(220uf10v) which has its other side connected to GND
When powered up, the capacitors located in front of, and connected to the speaker terminals burn up in dramatic fashion. I really don't know the value of the smd capacitors, and also have no idea what L4 is. I need to order these items immediately as I am finalizing an order that should ship by tonight or tomorrow.
These are the locations of the items I need identified so I can order replacements:
C93- one side to + speaker terminal, other side to GND(same as C94)
C92- each side is connected to the + and - speaker terminals
C99- each side is connected to the + and - speaker terminals
C88- one side to pin6, other side to pin7 of IR2010s
C89- one side to pin2, other side to pin3 of IR2010s
C166- one side to pin2, other side to pin3 of IR2010s
C90-one side to pin11 of IR2010s, other side to GND
L4- one side to D16 diode, other side to C15 capacitor(220uf10v) which has its other side connected to GND
Attachments
I understand that there may not be much available information on this particular amplifier, but if anyone has general knowledge about IR2010s equipped ClassD monoblock amps can they share what components are in the same position in the circuits of those amps?
The datasheet and application notes from the manufacturer generally tell you how to choose the various values.
What are the other ICs used with the output drivers?
What are the other ICs used with the output drivers?
I am really hoping to at least get some suggestions as to what can be used on these locations quickly as I have to place a Mouser order no later than tomorrow....
These are the ICs on the board...
Also, what is L4? I believe it is still functional but it sustained some physical damage. It is the same as the other 3 just like it.
These are the ICs on the board...
Also, what is L4? I believe it is still functional but it sustained some physical damage. It is the same as the other 3 just like it.
Attachments
I don't recognize the overall circuit.
Don't lose sight of the fact that you don't have to repair every amplifier you get. Some amplifiers are too badly damaged or take too much time/effort to repair.
Don't lose sight of the fact that you don't have to repair every amplifier you get. Some amplifiers are too badly damaged or take too much time/effort to repair.
I don't have a problem with time/effort to repair as long as it is repairable. I generally don't give up unless either the necessary parts are unattainable, or unidentifiable, or if the board is too badly damaged, or difficult to repair. I did not think this amplifier fell into any of these categories, other than difficult to repair... I do lack some equipment that will allow component identification, and knowledge/experience of this or similar amplifers.
However, if the most experienced and knowledgeable board members/technicians either deem the amp unrepairable, or are unable to provide advice/assistance to me, then repair is almost certainly impossible.
Is there any information that can be provided to assist me moving forward with this amplifier repair, or should I just consider it unrepairable?
However, if the most experienced and knowledgeable board members/technicians either deem the amp unrepairable, or are unable to provide advice/assistance to me, then repair is almost certainly impossible.
Is there any information that can be provided to assist me moving forward with this amplifier repair, or should I just consider it unrepairable?
I'm sorry that I can't help.
When I first started doing repairs, I spent far too much time on amps that took too long to repair. Life it short and if the repair isn't profitable to repair, that time in life should be spent doing more rewarding things (hopefully, repairing a piece of electronic equipment isn't the most rewarding thing in anyone's life). That's my take on it.
If you want to spend time on it, the manufacturer's literature for the IC or for similar ICs (2110, 2113) gives you all you need to know to calculate the value of the parts needed. Most aren't critical. If you get close, it will work.
It's sad that manufacturers don't support their products by supplying diagrams. Most are the 'reference designs' with only a few other things (power supply, preamp) added. Any competent design engineer with minimal test equipment can reverse engineer virtually any amp in just a few days so guarding the schematic only serves to hurt the repair industry.
When I first started doing repairs, I spent far too much time on amps that took too long to repair. Life it short and if the repair isn't profitable to repair, that time in life should be spent doing more rewarding things (hopefully, repairing a piece of electronic equipment isn't the most rewarding thing in anyone's life). That's my take on it.
If you want to spend time on it, the manufacturer's literature for the IC or for similar ICs (2110, 2113) gives you all you need to know to calculate the value of the parts needed. Most aren't critical. If you get close, it will work.
It's sad that manufacturers don't support their products by supplying diagrams. Most are the 'reference designs' with only a few other things (power supply, preamp) added. Any competent design engineer with minimal test equipment can reverse engineer virtually any amp in just a few days so guarding the schematic only serves to hurt the repair industry.
Hey mild2wild, can we get a overview shot of the whole board. JL had several amps that they did revisions on and then called it a different part number.
On a side note, I am with ya mild2wild, this is a hobby for me and I do not like giving up on an amp, even if it takes forever, due to how much I can learn from finally getting it working (gotta get that experience somehow).
And to Perry's point, drives me crazy that we cannot get schematics and sometimes parts from the manufactures. However never let that little warranty sticker scare you, the FTC sided in favor of the consumer under the Magnuson-Moss Warranty Act that you can get work done by 3rd party repair centers and the customer can open up devices and not void the warranty. Link
Hopefully we can figure out these parts for you my friend!
On a side note, I am with ya mild2wild, this is a hobby for me and I do not like giving up on an amp, even if it takes forever, due to how much I can learn from finally getting it working (gotta get that experience somehow).
And to Perry's point, drives me crazy that we cannot get schematics and sometimes parts from the manufactures. However never let that little warranty sticker scare you, the FTC sided in favor of the consumer under the Magnuson-Moss Warranty Act that you can get work done by 3rd party repair centers and the customer can open up devices and not void the warranty. Link
Hopefully we can figure out these parts for you my friend!
Are you going to take JL to court if they refuse to repair an amp under warranty if the tamper-evident tags are broken? Paying for the repair will be less than court costs and time.
Always ask the owner if they want you to break the tags before doing it.
Always ask the owner if they want you to break the tags before doing it.
Hello. How did the amp work out? I also have HD1200 and also it needs to be repaired. Did u find any schematics or service manual for this?