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Post by PianoManKen on Sept 16, 2013 12:03:57 GMT -5
Just got my XPA-5, and as soon as I turned my source on, it went into protect mode, with red lights flashing. I checked connections, and couldn't find a problem, so I started over. I just have my fronts hooked in, and no problems - sounds great! When I hook up the center and surrounds (in and out), I'm back in protect mode. Any suggestions on how else I can troubleshoot?
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Post by Dark Ranger on Sept 16, 2013 13:22:31 GMT -5
Hi PianoManKen,
My first thought would be a cabling issue that could be shorting out a channel on your XPA-5. There are several ways to approach this, but I'll share how I would proceed considering what you've done already.
Standard disclaimer: when working with amplifiers, be sure to turn off the amp and remove the power cable before connecting, removing, or adjusting the input/output cables.
Step #1
Since you've already tested the Front Left/Front Right and those have "known working" cables and amp channels, what we need to do is test only the Surround Left, Surround Right, and Center speakers/cables/channels.
Make sure the amp is turned off. Disconnect all the RCA/XLR interconnects, as well as the FL/FR channel speaker cables. Connect only the SL, SR, and Center speaker cables to the appropriate amp channels. We want only the speaker cables connected right now. Once the SL, SR, and Center speaker cables are connected to the amp, power up the amp.
If the amp works fine (no protect mode), go to Step 2.
If it goes into protect mode, turn off the amp and disconnect the SL speaker cable. Power on the amp. If it goes into protect mode, turn off the amp and disconnect the SR speaker cable. Power on the amp. If it goes into protect mode, turn off the amp and disconnect the Center speaker cable.
When you find the channel/cable that's causing the amp to enter protect, check both ends of the speaker cable (even where it connects to the back of the speaker) to ensure there are no stray strands touching. If still no joy, try a different speaker cable.
Step #2
If the SL, SR, and Center speaker cable tests work OK, shut down the amp and reconnect your FL/FR speaker cables. So we want all five speaker cables (FL, FR, C, SL, SR) connected to the appropriate amp channels. Do NOT plug in the RCA/XLR interconnects yet. Power on the amp. The amp should not enter protect mode based on the testing so far. If it does, we'll have to approach it a different way. If the amp operates normally, go to Step 3.
Step #3
Shut down the amp. Plug in all five RCA (or XLR) interconnects to the amplifier and turn it on. If it enters protect, shut down the amp and remove one of the inputs. Turn it back on. Repeat this until you isolate the problem interconnect. It's possible that an interconnect is faulty, so try replacing it.
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Post by garbulky on Sept 16, 2013 13:38:25 GMT -5
^^^this is very well put.
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Post by wizardofoz on Sept 16, 2013 13:42:04 GMT -5
If there is an issue with a module in the xpa-5 then it will show red even with no speaker connected.
As noted an rca can also cause a protect mode issue.
You could also try say the left speaker on every channel one at a time to see if all the channels work individually, along with one rca connection to the same amp each time. Select a source like tuner that has a known signal playing
Make sure all your inputs are correctly set for bal/unbal too, while this shouldnt cause any protect modes it can cause a channel to not play when you accidentally have bumped it to the wrong input type.
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Post by wizardofoz on Sept 17, 2013 9:00:31 GMT -5
And the verdict is?  |
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vcrpro3
Minor Hero
..A loony lunatic.....
Posts: 73 
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Post by vcrpro3 on Mar 13, 2019 13:01:10 GMT -5
Can a Emotiva go into protection mode, with no input or speaker connections if a plug on the chassis is making poor contact or if there may be some cold solder joints that have broken loose?
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KeithL
Administrator 
Posts: 9,929
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Post by KeithL on Mar 13, 2019 13:35:30 GMT -5
It's definitely possible.
An amplifier can go into protect because of:
- a loose of shorted speaker connection - an actual faulty speaker (a loose or shorted part inside the driver or crossover)
- a loose or shorted interconnect - an excessively nasty input signal (high frequency noise) - an internal fault in the amplifier that causes DC at the output or internal oscillation
- an internal fault with the fault protection circuitry itself
And a few of those situations could occur as the result of a loose connection or solder joint, or a failed component, inside the amplifier.
Can a Emotiva go into protection mode, with no input or speaker connections if a plug on the chassis is making poor contact or if there may be some cold solder joints that have broken loose? |
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vcrpro3
Minor Hero
..A loony lunatic.....
Posts: 73
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Post by vcrpro3 on Mar 13, 2019 15:30:55 GMT -5
I'm toying with buying a single XPA-1L that the seller say is in protection mode. I am waiting for his reply as to whether it is with connections to sources or speakers or without any connections. It's definitely possible.
An amplifier can go into protect because of:
- a loose of shorted speaker connection - an actual faulty speaker (a loose or shorted part inside the driver or crossover)
- a loose or shorted interconnect - an excessively nasty input signal (high frequency noise) - an internal fault in the amplifier that causes DC at the output or internal oscillation
- an internal fault with the fault protection circuitry itself
And a few of those situations could occur as the result of a loose connection or solder joint, or a failed component, inside the amplifier.
Can a Emotiva go into protection mode, with no input or speaker connections if a plug on the chassis is making poor contact or if there may be some cold solder joints that have broken loose? |
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KeithL
Administrator
Posts: 9,929
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Post by KeithL on Mar 13, 2019 16:13:09 GMT -5
Not to be a killjoy... but, from that description, I would be especially sure of the warranty status of the unit... and that the current owner has a warranty to transfer to you.
(Assuming the current owner is still under warranty, and he didn't abuse the amp, it would seem to make sense for him to have the amp repaired before selling it.)
I'm toying with buying a single XPA-1L that the seller say is in protection mode. I am waiting for his reply as to whether it is with connections to sources or speakers or without any connections. It's definitely possible. An amplifier can go into protect because of: - a loose of shorted speaker connection - an actual faulty speaker (a loose or shorted part inside the driver or crossover)
- a loose or shorted interconnect - an excessively nasty input signal (high frequency noise) - an internal fault in the amplifier that causes DC at the output or internal oscillation
- an internal fault with the fault protection circuitry itself
And a few of those situations could occur as the result of a loose connection or solder joint, or a failed component, inside the amplifier.
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vcrpro3
Minor Hero
..A loony lunatic.....
Posts: 73
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Post by vcrpro3 on Mar 13, 2019 16:15:30 GMT -5
I'm toying with buying a single XPA-1L that the seller say is in protection mode. I am waiting for his reply as to whether it is with connections to sources or speakers or without any connections. It's definitely possible.
An amplifier can go into protect because of:
- a loose of shorted speaker connection - an actual faulty speaker (a loose or shorted part inside the driver or crossover)
- a loose or shorted interconnect - an excessively nasty input signal (high frequency noise) - an internal fault in the amplifier that causes DC at the output or internal oscillation
- an internal fault with the fault protection circuitry itself
And a few of those situations could occur as the result of a loose connection or solder joint, or a failed component, inside the amplifier.
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vcrpro3
Minor Hero
..A loony lunatic.....
Posts: 73
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Post by vcrpro3 on Mar 13, 2019 16:20:52 GMT -5
Just got an answer from the seller. Said it worked one day, then when attempting to use next time,was the malfuntion. Said voltage light in rear by main power switch lit, but no illumation of front activation button. Says he did not open unit. Kinda makes me think some internal fuse blown or bad internal connection. No i got to decide wheter or not to take a gamble on it as i already have one. Owner aknowledges amp is out of warranty and got estimate from Emotive via communicating with them. I did not ask why why he decided to sell rather than repair. I would suspect that cost of shipping back and forth in addition to the repair might have been an issue... I'm toying with buying a single XPA-1L that the seller say is in protection mode. I am waiting for his reply as to whether it is with connections to sources or speakers or without any connections. |
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vcrpro3
Minor Hero
..A loony lunatic.....
Posts: 73
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Post by vcrpro3 on Mar 14, 2019 16:02:19 GMT -5
I have three choice at this point; buy the non working one and hope that it is a case of either blown fuses or bad connections inside, wait until i find a single working one for a reasonable price or just resell the one i have and call it a day......
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Post by cam555 on Mar 18, 2019 7:36:30 GMT -5
My Xpa 5 goes into prtotect mode when i try using xlr cables. Ive tried everything from swapping cables to rearranging cables and its always ch4. My xpa5 is way out of warranty so I tore it down and managed to get the xlr connector board out. Any ideas how to fix this. And is it safe to take off this thin metal plate they have zip tied to the board or would that cause more problems?  |
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Post by pedrocols on Mar 18, 2019 8:13:28 GMT -5
Can a Emotiva go into protection mode, with no input or speaker connections if a plug on the chassis is making poor contact or if there may be some cold solder joints that have broken loose? Wow back from the dead. This thread is 6 years old. |
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Post by 405x5 on Mar 18, 2019 9:18:40 GMT -5
Can a Emotiva go into protection mode, with no input or speaker connections if a plug on the chassis is making poor contact or if there may be some cold solder joints that have broken loose? Wow back from the dead. This thread is 6 years old. Yes and funny That it’s listed as a new thread |
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