Lexmark MX81 Series Service Manual page 654

Connector Connects to
J54 Main cooling fan
J56 Control panel interlock sensor
J57 Printhead mirror motor
J58 Toner cartridge smart chip contact
J73 Image density sensor
J80 Top option interface cable
J81 Lower option interface cable
Pin no. Signal
1 S_MAIN_FAN_ENC_C
2 GND
3 S_MAIN_FAN_C
1 S_COVER_CLOSED_C
2 GND
3 S_COVER_LED_C
1 MM_REFCLK_C
2 MM_LOCK*_C
3 MM_START*_C
4 GND
5 +24V_FUSE_B
1 S_CART_SDA_C
2 V_CART
3 S_CART_SCL_C
4 GND
5 S_LD_RELAY_HI_C
6 S_LD_RELAY_RET_C
1 S_TDS_LED_PWM*_C
2 S_A_TDS_C
3 GND
4 S_TDS+5V_C
1 +24V_TOP_OPT_C
2 GND
3 S_RXD_PP_TOP_C
4 GND
5 S_TXD_PP_TOP_C
6 GND
1 +24V_BOT_OPT_C
2 GND
3 S_RXD_PP_BOT_C
4 GND
5 S_TXD_PP_BOT_C
6 GND
Component locations
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