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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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JBL PB12 Subwoofer Amp
The amp just blew in my sub and after looking around the
internet, I see this is a common problem with this amp. Anyone out there have any experience with this amp and give me a heads up on what to look for? I've only had it a year and a half and would hate to think it's just trash now. Thanks in advance. David |
#2
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JBL PB12 Subwoofer Amp
I count six service bulletins and a service manual that includes a parts
list. I have ordered parts for these before. They seem to be serviceable to me. Where are you getting your information, Jurb? It is not a great sub, but very likely worth fixing. Get it to a shop that is authorized for Harman products, or at least has experience fixing them, for an estimate. Leonard Caillouet "JURB6006" wrote in message ... Actually JBL in all their benevolence have made these things unservicable. No parts no nothing. Send it in. Your alternetive is to run it off another amp. Of course then you got an extra channel for something else, but what ? JURB |
#3
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JBL PB12 Subwoofer Amp
This is really the type of thing that should be serviced by an authorized
servicer, or at least an experienced tech type. Mark Z. wrote in message ... The amp just blew in my sub and after looking around the internet, I see this is a common problem with this amp. Anyone out there have any experience with this amp and give me a heads up on what to look for? I've only had it a year and a half and would hate to think it's just trash now. Thanks in advance. David |
#4
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JBL PB12 Subwoofer Amp
Actually JBL in all their benevolence have made these things unservicable. No
parts no nothing. Send it in. Your alternetive is to run it off another amp. Of course then you got an extra channel for something else, but what ? JURB |
#5
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JBL PB12 Subwoofer Amp
They're fixable. Do it all the time.
Mark Z. "Leonard Caillouet" wrote in message news:vq7ab.18896$pe.14141@lakeread06... I count six service bulletins and a service manual that includes a parts list. I have ordered parts for these before. They seem to be serviceable to me. Where are you getting your information, Jurb? It is not a great sub, but very likely worth fixing. Get it to a shop that is authorized for Harman products, or at least has experience fixing them, for an estimate. Leonard Caillouet "JURB6006" wrote in message ... Actually JBL in all their benevolence have made these things unservicable. No parts no nothing. Send it in. Your alternetive is to run it off another amp. Of course then you got an extra channel for something else, but what ? JURB |
#6
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JBL PB12 Subwoofer Amp
I can replace a cap, if that's what it is. I just don't have a cap
meter to find out which one is bad. I was hoping someone had experience with this amp to point me in the right direction. When it went out, it sounded like a machine gun, rapid loud pops. if anyone has any ideas what it could be, please post back to the group. Thanks, David On Wed, 17 Sep 2003 19:44:26 -0400, "Leonard Caillouet" wrote: I count six service bulletins and a service manual that includes a parts list. I have ordered parts for these before. They seem to be serviceable to me. Where are you getting your information, Jurb? It is not a great sub, but very likely worth fixing. Get it to a shop that is authorized for Harman products, or at least has experience fixing them, for an estimate. Leonard Caillouet "JURB6006" wrote in message ... Actually JBL in all their benevolence have made these things unservicable. No parts no nothing. Send it in. Your alternetive is to run it off another amp. Of course then you got an extra channel for something else, but what ? JURB |
#7
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JBL PB12 Subwoofer Amp
The unit for which I posted and called them about was I think a PSW-D112. It
has a class D amp with very few peripheral components. When I called JBL I got sick of being on hold for ½ an hour. Screw it. If you have specific knowledge as to the unit to which the original poster enquired, I'll take a bit of enlightenment. The only experience I've had was bad. The reply to my post, in SER was that nothing is available, now that might not be true of an older unit, if so, stock up on a few part if you service them. It might be coming to an end. (big suprise ey?) JURB |
#8
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JBL PB12 Subwoofer Amp
They're fixable. Do it all the time. This thing has a heatsinked component with maybe 18 or 20 leads, actually a twosided PC in a slot on the main PC which has the coil, rectifiers and filters. This is a switching amp and I am sure there are not enough conponents on the main baord to support it, it's pretty much self contained. I think the main part says something like S186 on it. This thing is not completely dead, fuses etc are OK. all it does is chirp, in time with the music ! Even without service info, I think it needs the "hybrid". The solder connections look good as well. If you have something to say, please do. This is a nice subwoofer, and it sounded great on an external amp. If the amp can't be fixed, it will probably wind up being used that way. Thanx in advance, and you can't email me yet, post back here if you want to and I'll fix it. My antispam regimen is very aggressive. JURB |
#9
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JBL PB12 Subwoofer Amp
I have a PB12 unit that just keeps blowing fuses every 3 seconds. Can
anyone enlighten me at to what may be the issue? I have heard that they blow capacitors. It blew up while it was not in use. It was in stand by mode. Thx for your help Scot |
#10
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JBL PB12 Subwoofer Amp
"Scot" wrote in message m... I have a PB12 unit that just keeps blowing fuses every 3 seconds. Can anyone enlighten me at to what may be the issue? I have heard that they blow capacitors. It blew up while it was not in use. It was in stand by mode. Best get it to a servicer who has access to Harman tech info and some experience with these. There are several service bulletins and modifications that should be considered when servicing this unit. Leonard Caillouet |
#11
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JBL PB12 Subwoofer Amp
The PB12 has a special amp module that is no longer available. Check the
choke on the amp board for signs of burning. You may be able to get Harman to replace your sub at no cost due to the parts being, not available. They did it once for a customer who needed the amp module, the unit had been brought in for me to fix. It sounded to me that free replacement was their policy on this model. They did replace it with another PB12 and I had to send the old sub back, but the price was right! Good Luck Bob Keller "Scot" wrote in message m... I have a PB12 unit that just keeps blowing fuses every 3 seconds. Can anyone enlighten me at to what may be the issue? I have heard that they blow capacitors. It blew up while it was not in use. It was in stand by mode. Thx for your help Scot |
#12
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JBL PB12 Subwoofer Amp
Haven't we been through this just recently? This uses the S53AMI module
does it not? This module is available from Harman (JBL). The entire board may not be available but they are repairable. Leonard Caillouet "Rob" wrote in message ... The PB12 has a special amp module that is no longer available. Check the choke on the amp board for signs of burning. You may be able to get Harman to replace your sub at no cost due to the parts being, not available. They did it once for a customer who needed the amp module, the unit had been brought in for me to fix. It sounded to me that free replacement was their policy on this model. They did replace it with another PB12 and I had to send the old sub back, but the price was right! Good Luck Bob Keller "Scot" wrote in message m... I have a PB12 unit that just keeps blowing fuses every 3 seconds. Can anyone enlighten me at to what may be the issue? I have heard that they blow capacitors. It blew up while it was not in use. It was in stand by mode. Thx for your help Scot |
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