Lexmark T642 Service Manual - Page 66

4061-xx0 Service error codes (9xx.xx) (continued) Error code Sub codes Display text Description 937 .4 Overspeed detected during speed control. Motor is type 0. • Faulty motor sensor • Faulty system board 937 .41 Overspeed detected during speed control. Motor is type 1. • Faulty motor sensor • Faulty system board 937 .5 Overspeed detected during position control. Motor is type 0. • Faulty motor sensor • Faulty system board 937 .51 937 .7 937 .71 Overspeed detected during position control. Motor is type 1. Loss of lock detected by higher level code. Motor is type 0. Loss of lock detected by higher level code. Motor is type 1. • Faulty motor sensor • Faulty system board • Defective motor cable • Defective main drive motor • Paper jams • Defective motor cable • Defective main drive motor • Paper jams 937 .80 939 .00 Driver over temperature detection. Motor is type 0. RIP-engine communications lost. • Excessive gear loading in gearbox assembly System board 940 .00 LVPS zero-crossing test failed. • Incorrect LVPS installed • Noisy AC power source • LVPS to system board cable loose 947 .00 948 .00 PQET RAM test incomplete, PQET RAM test did not complete, PQET RAM test failed MARCH0 PQET RAM test failed MARCH1 PQET RAM test busy failure Pel clock check failed PQET failed to pass RAM tests on the system board System board Action Go to "Main drive service check" on page 2-105. Go to "Main drive service check" on page 2-105. Go to "Main drive service check" on page 2-105. Go to "Main drive service check" on page 2-105. Go to "Main drive service check" on page 2-105. Go to "Main drive service check" on page 2-105. Go to"Main drive service check" on page 2-105. POR the printer several times, if the error code continues to be displayed, replace the system board. See "System board and inner shield removal" on page 4-76. Check to make sure the correct LVPS assembly has been installed. If the correct supply is installed, check to make sure the LVPS to system board cable is installed correctly. If correct, replace the LVPS assembly. See "Low voltage power supply removal" on page 4-54. Replace the system board. See "System board and inner shield removal" on page 4-76. Replace the system board. See "System board and inner shield removal" on page 4-76. 2-26 Service Manual