Lexmark C912 Service Manual - Page 472

5055-xxx handling printed circuit boards 4-1 service precautions 4-1 S safety information 1-xi sensors belt up/down detection 4-11 density 4-14 drive gear unit 4-15 finisher, functions 3-64 high-capacity feeder paper end sensor removal 4-84 high-capacity feeder paper level 4-87 high-capacity feeder paper size sensors (1, 2) removal 4-84 humidity 4-54 locations 5-4 multipurpose feeder paper present 4-33 paper full 4-18 paper remaining 4-39 paper size sensor board assembly 4-39 sensor board 4-50 temperature 4-54 turn guide cover 4-65 serial number 1-32, 3-29 service checks 2-68 drive 1 DC motor 2-68 drive 2 stepper motor 2-68 duplex 2-69 expansion paper feed 2-69 face down stacker full 2-70 face up exit assembly 2-82 high capacity feeder (HCF) 2-70 marks on paper 2-72 operator panel 2-73 options 2-98 paper carrying 2-74 paper exit, face up exit assembly 2-82 paper tray missing 2-83 photodeveloper missing 2-84 power supply 2-85 serial port 2-98 transfer belt up/down 2-87 service communication 2-16 service error tray elevator motor 2-32 900 - unrecoverable software error 2-4 910 - drive motor error 2-4 911 - paper exit motor error 2-5 912 - high capacity feed motor error 2-5 917 - RIP fan error 2-5 918 - main unit fan error 2-6 919 - power supply fan error 2-6 92x - toner sensor error 2-9 920 - fuser error - fuser heater trouble 2-6 923 - upper fuser thermistor open error 2-7 924 - lower fuser thermistor open error 2-7 925 - HVU error 2-8 930 - printhead error, yellow 2-10 931 - printhead error, magenta 2-11 932 - printhead error, yellow 2-12 933 - printhead error, black 2-13 934 - drum sensor, color 2-14 935 - drum sensor, black 2-14 936-9 - cassette error 2-15 940 - high-capacity feed sensor error 2-15 941 - high-capacity feed tray error 2-15 942 - duplex error 2-16 945 - engine flash error 2-16 946 - printer/printhead controller board communication 2-16 947 - finisher communication error 2-17 948 - machine ID error 2-17 949 - tray (x) communication error 2-18 950 - printer control board 2-18 952 - NVRAM chip failure 2-18 954 - NVRAM CRC failure 2-18 955 - code CRC 2-19 956 - processor failure 2-19 I-6 Service Manual