Question about Harman Kardon PA 4000 8-Channel Amplifier
I have a Harman Kardon PA5800 amplifier. While the system was on I was taking speakers wires off one speaker lead and puttin gthem on anotehr when my system went dead. When I powered the amp back on it now displays a short circuit indication. I will not green. I opened the unit and checked all the fuses, which are good.
Doyou have any suggestions? I'm hoping to get this fixewd by the Superbowl.
SOURCE: Amp problems
From the above symptom, it show that the output stage of the amplifier have some problem.The protection cct come in to cut off the amp. when the output shorted or have Dc voltage.( this is to prevent further damage to the amp. & speaker ).If you know how to repair , just check on the pwr transistor (with heat sink )or else send it to the repair center.hope it help.
Posted on Aug 21, 2007
You have a bad amplifier section and your unit will need to be repaired by a technician. I would disconnect the speakers to prevent possible damage. In some cases components in line with the transistors will be bad in the amplifier also. There is no way to tell without electrically testing the unit in shop. Estimated repair cost would be in the 60 to 80 dollar range depending on the number of parts that are bad and the labor rate in your area.
Posted on May 04, 2010
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IMPORTANT: When connecting two pairs of speakers, determine the impedance of each pair
by looking on the back of the speakers, in your owner's manual, or by contacting your dealer or manufacturer.
You can listen to two pairs of speakers at the same time ONLY if the impedance of EACH speaker is NOT LESS THAN 8 Ohms.
WARNING: Do not play sets of speakers simultaneously except as recommended above.
Amplifier may overheat.
Jul 09, 2011 | Harman Kardon Harman HK 990 Amplifier
It could be a short in your speaker wire or the crossover in your speakers.
1) Turn off your unit and disconnect your speaker wires at the amp, if the protect is no longer displayed when the unit is turned back on, check the connections on the speakers. If you do not visually see a short on the speaker wire connection, turn off the unit and disconnect the wires at the speaker and isolate them so they do not touch then connect the speaker wires at the amp. Turn on the amp and see if the protect is on. If it is on, the wire has a short somewhere in the line. If the protect is off then suspect the speaker has a short in the voice coil or crossover.
2) If the protect is still on after you disconnect the speaker wires at the amp, it could be the power IC in the amp is shorted and needs to be replaced.
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