Harman Kardon PA 4000 Owners Manual - Page 14

Service Information If your installation has followed the procedures in this manual, you should enjoy many years of trouble-free operation and high-quality listening enjoyment. The PA 4000 does not contain any user-serviceable parts. If you suspect a problem that may require service assistance, contact your dealer, installer or an authorized Harman Kardon service center. You may also contact Harman Kardon at www.harmankardon.com. It is important that any repairs be carried out only by an authorized Harman Kardon service agent to ensure proper service and preserve the protection of your Limited Warranty. It's a good idea to keep your sales slip or receipt in a safe place (along with this manual) so that it will be available to verify the purchase date for warranty claims. The items listed below are a brief guide to minor problems that may arise with audio equipment such as the PA 4000. Before taking a unit in for service, you should check to see whether any of these hints solve the problem. If these solutions do not rectify the problem or if the problem recurs, contact your dealer or an authorized Harman Kardon service center for assistance. Fuse Replacement In rare situations, the fuses protecting the PA 4000's output stages may blow to protect the unit and your speakers. If any amplifier pair does not operate, and if the front-panel indicators do not light, it is possible that a short or overload condition has caused one of the fuses to blow. If you suspect that a fuse has blown, follow these steps: • Turn the amp off and remove the power cord. • Check all speaker wire connections - both on the amplifier side and on the speakers - to make certain that there are no shorts. • Remove each fuse and then, if a fuse has blown, replace it with a replacement of the same type and rating, as shown on the rear panel. • Reconnect the power cord and turn the amplifier on again. If the amplifier continues to blow fuses or go into the Protect mode after all connections have been checked for shorts, there may be an internal problem with the unit. In that case, contact your dealer or an authorized Harman Kardon service center for assistance. Troubleshooting Guide SYMPTOM CAUSE SOLUTION Amplifier or one channel will not turn on. • Power switch turned off (no power light LED) • Remote trigger cable not properly connected • Power Control Mode Switch · not set to the proper position • Turn on power switch. • Verify connection of trigger cable at both ends. • Turn the amp off and remove the power cord and check that the Power Control Mode Switch for the channel that will not turn on is set to the correct position. See page 8. Amplifier turns on, but there's no audio from one or more channels. • Inputs not connected to proper jack • Speakers not connected properly • Improper settings or levels from processor or controller • Check input connections. • Check speaker connections. • Check the settings on your preamp, processor or controller. Audio plays, then cuts off. • Amplifier shorted (Protect Indicator lights) • Check speaker connections for short circuit. No sound is heard from a channel pair and a Protect Indicator 4 is lit. • The amplifier has sensed an overload condition or short and has put the amp in the Protect mode to prevent damage to the amp or your speakers • Turn the amp off and remove the power cord. Check all speaker connections to make certain that there are no shorted conductors. No sound from BOTH Channels 1 and 2 or Channels 3 and 4. • An overload or short condition may have caused one of the two fuses to blow to prevent damage to the amp or your speakers • Turn the amp off and remove the power cord. Check the fuses and replace them, if needed, with a fuse of the same rating. 14 SERVICE & TROUBLESHOOTING