Harman Kardon AVR80 Technical Manual

Also see for AVR80: Owner's manual Owner's manual

85. AM IF AdjustmentStep Input Signal Source Signal Source Signal Output Level Reception Adjustment AdjustmentConnection Frequency and Modulation Frequency Point ValueSignal generator output to 999 KHz Output level1 transmission *loop antenna. • 300 uV/m (50 dB/m) Tuning point LA06 (LorR)(*:Standard required loop) 1000 KHz Maximum• atTAPE-OUTThis adjustment is normally not necessary, because the coil LA06 is preset by the original supplier.6. AM Tracking Adjustment (MW)Step Input Signal Source Signal Source Signal Output Level Reception Adjustment AdjustmentConnection Frequency and Modulation Frequency Point ValueSignal generator output to 603 KHz 603 KHz Output level• Level 300 - 400 uV/m• (LorR)1 transmission *loop antenna. 600 KHz Mod. 400 Hz 30% 600 KHz LA01 Maximum(*:Standard required loop)• • at TAPE-OUT- 1404 KHz 1404 KHz Output level2 • Level 300 - 400 uV/m• CA01 (LorR)1400 KHz Mod. 400 Hz 30% 1400 KHz Maximum• 4D at TAPE-OUT3 Repeat step 1 and 2 until level is at maximum reading.7. AM Tracking Adjustment (LW)Step Input Signal Source Signal Source Signal Output Level Reception Adjustment AdjustmentConnection Frequency and Modulation Frequency Point ValueSignal generator output to Output levelLevel 300 - 400 uV/m (LorR)1 transmission *loop antenna. 171 KHz Mod. 400 Hz 30% 171 KHz LA03 Maximum(*:Standard required loop) at TAPE-OUT- Output level2 270 KHz Level 300 - 400 uV/m 270 KHz CA08 (LorR)Mod. 400 Hz 30% Maximumat TAPE-OUT3 Repeat step 1 and 2 until level is at maximum reading.8. AM auto stop AdjustmentStep Input Signal Source Signal Source Signal Output Level Reception Adjustment AdjustmentConnection Frequency and Modulation Frequency Point ValueSignal generator output to 999 KHz 999 KHz• • "TUNED"1 transmission *loop antenna. 1000 KHz 500 uV/m (54 dB/m) 1000 KHz RA11 indicate on FLD(*:Standard required loop)• •-2 1000 uV/m (60 dB/m) AUTO SCAN Only Confirm "TUNED"indicate on FLDREMARK: This adjustment is related to the FM muting Level Adjustment. The FM muting Level re-adjustment is necessaryafter this adjustment.9. On Screen Display VCO AdjustmentStep Input Signal Source Measuring Measuring equipment Input selector Adjustment Adjustmentand Connection position Point ValueColor bar or other standard ICQX601 video signal. 26pin and DC voltmeter LD CX67 2.5V +-0.1VVideo signal generator output (Impedance> 10K ohmN)to LD video input. GND.REMARK: Connect the TV monitor to the monitor output terminal of the product.10. Main amp idling current adjustment1) With the power OFF, set semi - fixed resistor R743(Leh), R744 (Reh), R786 (Center ch) on the PCboard (PV04) to the center position.2) Connect a digital voltmeter, set for the DC range,on the emitter resistor [R759 (Leh), R760 (Reh),R794 (Center ch)] on the PC board (PV04) .3) After the above, adjust the idling current as follows:Turn the power ON and adjust semi - fixed resistorR743 (Leh), R744 (Reh), R786 (Center ch) whileobserving the digital multimeter indication.The target value is 7.2 mV (20 mA).All values are with no load on speaker terminals, volumeset to minimum and no input with the unit switched to theCD position. Always allow the amplifier to stabilize for 10minutes or longer prior to adjusting idle current.11. Main amp DC offset adjustment1) With the power OFF, connect a digital voltmeter, setfor the DC range, to the speaker terminal.2) After the above, adjust the DC offset as follows:Turn the power ON and adjust RN63 (Leh), RN64(Reh), RN70 (Center ch) so that the output is ±20mV.(.:C(www.audiodna.sk