HK 990 (serv.man2) - Harman Kardon Audio Service Manual (repair manual). Page 5

 

 

CONNECTIONS

 Right Loudspeaker output, System 2.

 Right Loudspeaker output, System 1.

 RS-232 connector for possible future PC 

update. Update Switch.

 Input jacks for one or two subwoofer signals 

from external surround processor.

  Output jacks for two subwoofers.

 Digital coaxial output jack for digital record-

ing. Also permits digital recording of analog 
sources.

 Preamplifier output jacks. 

  Analog output jacks for tape recording.

  Analog output jacks for CD Recorder analog 

recording.

  AUX input jacks, suitable for analog signals 

from video games, video recorders etc.

 TV input jacks for analog sound input from 

your TV.

 TAPE input jacks for analog tape replay.

 CDR input jacks, for CD Recorder analog 

replay.

  Balanced analog inputs (XLR), for use with all 

signal sources that output balanced signals. 
Available via the CD Input function only, as 
an alternative to the unbalanced RCA jacks 
(Input G). Pin configuration for the XLR
Inputs: Pin 1 is Ground, Pin 2 is Plus/Hot, Pin 
3 is Minus/Cold.

  Left Loudspeaker output, System 2.

  Left Loudspeaker output, System 1.

 Power lead AC input.

 TUNER analog Input jacks.

 PROCESSOR Analog Inputs. These Inputs 

go directly to the power amplifier section 
of the HK 990, bypassing the Volume and 
Tone Control. Here you can connect the 
Front Channel Pre Out L+R signals from an 
external surround processor, to benefit from 
the superior power of the HK 990 and control 
volume from the processor. NOTE: Only use 
the Processor Input with a device that has its 
own volume control! 

G CD analog Input jacks. You can select either 

this Input or the Balanced Input as analog 
Input in the CD Input Setup Mode.

 Phono Input for record player with Moving 

Magnet (high output and high impedance) or 
High-Output Moving Coil cartridge.

 Phono Input for record player with Moving 

Coil (low output and low impedance) car-
tridge.

 If your record player has a separate Ground 

wire, attach it here to avoid hum noise.

 Connect the trigger Input (if available) on 

one or two subwoofers to these trigger ON/
OFF output jacks. When you switch ON the 
HK 990, it sends a trigger signal, which 
switches ON the subwoofer. When switching 
OFF the HK 990, the subwoofer also switches 
OFF.

 HRS (High-Resolution Synchronization) Input. 

Use the included HRS-cable to connect the 
HD 990 CD player (or other similarly equipped 
player) for optimum sound quality.

  Optical Digital Inputs (TOS-Link). Connect 

any digital device with Optical Digital Output
to one of these Inputs. Push the Optical Jack 
through the hinged door that covers the Input 
until it clicks into place.

 Coaxial Digital Inputs. Connect any digital 

device with Coaxial Digital Output to one of 
these Inputs. Usually, Coaxial Digital transmis-
sion is preferred to Optical, given a choice.

 Remote IN. To control your HK 990 with an 

external infrared remote sensor, connect the 
wire from the remote sensor here.

 Remote OUT. Connect other Harman Kardon 

devices (you may also experiment with other 
brands) that you wish to control with the 
HK 990 Remote Control to this Output.

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