 Power Indicator: This LED will illuminate inamber when the unit is in the Standby mode tosignal that the unit is ready to be turned on.When the unit is in operation, the indicator willturn blue.1 System Power Control: Press this buttonto turn on the TU 970 II; press it again to turnthe unit off (to Standby). Note that the PowerIndicator  next to the switch will turn bluewhen the unit is on.2 Band Selector: Press this button to changebetween the DAB, FM and AM frequency bands.3 Function/FM Mode Selector: In DABmode, pressing this button will activate stationorder, preset tune, Dynamic Rate Control ormanual tune features. In FM mode, press thisbutton to select the stereo or mono mode forFM tuning. In the stereo mode, the wordSTEREO will be shown in the InformationDisplay 6, and stereo reception will beprovided when stations are transmitting stereosignals. In the mono mode, the left and rightsignals from stereo broadcasts will be mixedtogether and reproduced through all channels.Select MONO for better reception of weaksignals.4 Info/RDS Button: In DAB mode, pressingthis button will change the content of the lowerdisplay line of the Information Display as shownon page 9, as well as signal error rate and soft-ware version. In RDS mode, it will changebetween the different RDS options.5 Auto Tune Button: In DAB mode, press thisbutton to automatically scan all availablestations.6 Information Display: This dual line displaydelivers messages and status indications to helpyou operate the tuner.7 Dimmer: Press this button to dim the frontpanel display. The first press of the button willdim the displays to one-half normal brightness;the next press will turn back to normal bright-ness. The display will return to normal brightnessthe next time the unit is turned on.8 Memory Button: Press this button to openthe memory position that stores a presetlocation in the tuner. 99 DAB presets can bestored, as well as 30 FM and 30 AM presets.(See page 9 for more information on tunerpresets.)9 Control Ring: Turn counterclockwise totune lower frequency stations and clockwise totune higher frequency stations. When a stationwith a strong signal is tuned, the InformationDisplay 6 will read TUNED. Turn again totune to the next frequency increment in ManualTune Mode, or automatically to the nextstation with a signal strong enough foracceptable reception in Auto Tune Mode.The ring also controls the parameters in thedifferent menus.A Select: In FM or AM mode, press thisbutton to select Auto Tune, Manual Tune orPreset Tune. In DAB mode, press this button toselect the displayed station.B Remote Sensor Window: The sensorbehind this window receives infrared signalsfrom the remote control. Aim the remote at thisarea and do not block or cover it unless anexternal remote sensor is installed.1 3 4 5 6 7 82 @ 9 AFront Panel Controls123456789ABPower IndicatorSystem Power ControlBand selectorFunction/FM Mode SelectorInfo/RDS ButtonAuto Tune ButtonInformation DisplayDimmerMemoryControl RingSelectRemote Control Sensorharman/kardonTU 970II/230 Service ManualPage 4 of 21

technical specifications

troubleshooting guide

front panel controls

Harman Kardon TU 970II/230 Service Manual