Service ManualModel No.:- 08 -3-2-1 Function Description:Main BoardProcess signal which incept from exterior equipment then translate into signal that panelcan display.&RQQHFWRUGH¿QLWLRQMain board connectorPin number Signal name Description1 RSPK+ RSPK+2 RSPK- RSPK-3 LSPK- LSPK-4 LSPK+ LSPK+Keypad and remote connector ( CN201 )3LQQXPEHU 6LJQDOQDPH 'HVFULSWLRQ/('B5 /$035('/('B* /$03*5((1,5 5(027(&21752/*1' *1'9 32:(5)255(027(1&.(<*1'91&STANDBYSpeaker connector (CN601)