Service ManualModel No.:- 09 -3-2-1 Function Description:Main BoardProcess signal which incept from exterior equipment then translate into signal that panelcan display.&RQQHFWRUGH¿QLWLRQMain board connectorKeypad andremote connector (CN203)3LQQXPEHU 6LJQDOQDPH 'HVFULSWLRQ /('B5 /$035(' /('B* /$03*5((1 ,5 5(027(&21752/ *1' *1' 9 32:(5)255(027(.(<.(<*1'78910NCSTANDBYSpeaker connector (CN807)Pin number Signal name Description1 RSPK+ RSPK+2 RSPK- RSPK-3 LSPK- LSPK-4 LSPK+ LSPK+