Service Manual Chapter4. Control Electronics
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4-15
3) I/O board connection diagram
CN4
J1
J7
J2
J8
J11
J5 CN3
CN1
J3
J4
J6
CN4
CN2
J1 : Modem Connection J2 : Connect with left function key
J3 : TTL_IN Connection J4 : Connect with right function key
J5 : TTL_OUT Connection J6,J7 : Connect with Main B/D
J8 : Connect with Inverter B/D J11 : Option Modem Connection
CN1 : LAN & 7 Serial Port CN2 : Speaker Connection
CN3 : Earphone Jack detect CONN CN4 : +24V Power Supply CONN