Harman Kardon AVR 430

2. BACK SURROUND B'D
: 5 Min. After power on, please set up Bias as below,
SBL > use VR31 then set P301 as 23mV +2mv/-1mV.
Center > use VR32 make P308 to 23mV +2mV/-1mV.
SBR > use VR51 then make P309 to 23mV +2mV/-1mV.
P301 VR31 BACK SURROUND L-CH P308 VR32 CENTER-CH