Harman Kardon Signature 1.5 Technical Manual

Also see for SIGNATURE 1.5: Owner's manual

Contents

Harman Kardon Signature 1.5 Technical Manual Manual pdf 7 page image

6Two Channel Amplifier Harman Kardon SIGNATURE 1.5OPERATIONThe Signature 1.5 may be operated in either a manual orautomatic mode. If the unit is being used in a stand-aloneoperation you should follow the instructions below forManual Operation. When the Signature 1.5 is connected toanother compatible device such as the Signature 2.0 orPT2500 tuner, follow the instructions for AutomaticOperation.Make sure the power switch is in the off position beforeplugging in the AC power cord. After all the connectionshave been made to the amplifier’s input jacks and speakerterminals, connect the power cord to an AC outlet. Turn onyour source component and receiver/processor first; startwith a low volume level to protect your speakers.Manual OperationThe LED indicator should be glowing red if the unit isplugged in. Press the front panel switch to turn the unit on.The indicator will flash green briefly, and then go out; thefront panel will then illuminate to blue.To turn the unit off, press the power switch again. The LEDindicator will return to red.Automatic OperationBefore proceeding, make certain the connection betweenthe Signature 2.0, PT2500, or other trigger source has beenconnected properly to the unit following the previousdirections. At this point the trigger source should be off.After all cables are connected and the Signature 1.5 isplugged in, the LED Indicator should be glowing red. Pressthe power switch and the indicator will turn amber indicatingthe unit is in the standby mode and ready to turn on when itreceives a signal from the triggering device. Finally, turn onyour Signature 2.0, PT2500, or other trigger source to turnthe Signature 1.5 on.The indicator will flash green briefly, and then go out; thefront panel will then illuminate to blue.At the conclusion of your listening session, there is no needto turn the Signature 1.5 off manually. When the Signature2.0, PT2500, or other trigger source is turned off, theSignature 1.5 will return to the standby mode.Important Note: If you will not be using your audiosystem for an extended period of time, such as a vacation,we recommend turning the Signature 1.5 off using thepower switch.IDLE CURRENT ADJUSTMENT FOR SIGNATURE 1.5Locate test points P4 and P5; these are 2 pin female molex connectors (2 total, 1 per channel) on the MAIN AMPLIFIER PCBnear the speaker terminals.Attach a DC voltmeter (set to a low range) to these points. This is best accomplished by making up a “test plug” using a malemolex connector that fits into the one in the unit, with wires attached, for connection to the voltmeter. An alternate method is touse two “mini-grabbers” to attach to the two outer pins on each connection. Warning: Do not accidentally short the two pointstogether with a meter probe during adjustment.Adjustment Points: R60, R69Adjust to 18mv across test points, one channel at a time, until both channels comply.OUTPUT TRANSISTOR REPLACEMENT ON THE SIGNATURE 1.51) Remove the top cover.2) Remove all molex connectors on the main amplifier board.3) Remove the (4) outer screws holding the heatsink plate to the chassis.4) Remove all outer Philips screws holding both speaker terminals and RCA connectors to the rear panel.5) Angle and lift the entire amplifier assembly and heatsink up and out of the chassis.