Gp 1 Engine Test Mode Entry - Xerox WorkCentre M20 Service Manual

GP 1 Engine Test Mode Entry

Purpose
To test various functions or components of the machine. The test is performed, then the result
is displayed on the LCD.
NOTE: If necessary, refer to GP 20 for the acronym list and cross reference lists of more com-
monly recognised part names.
Procedure
1. Press Menu/Exit, #, 1, 9, 3, 1 in sequence. The LCD will display 'Engine Test (Diagnos-
tic)'.
Test No. Test Items (Description)
0 ALL MOTOR TEST
FUSER MOTOR TEST (STEPPER)
Deve. MOTOR TEST (BLDC)
FUSER MTR DIR TEST
ALL MOTOR STOP
FCF(1st Tray) SOLENOID TEST
MPF(MP Tray) SOLENOID TEST
PTL TEST
FAN TEST
FUSER CONTROL TEST
FUSER TEMP CHECK
1 LSU MOTOR TEST
LASER DIODE TEST
LSU READY TEST
LSU HSYNC TEST
Work Centre M20 Family
2.
3.
4.
NOTE: To escape from the current test mode to the higher test mode, press the stop button.
NOTE: To escape from the engine test mode to the normal mode, press again the stop button.
Sensor Test Description
Refer to Table 2 Sensor Description, for the sensor names that are displayed on the LCD.
Actuating the relevant sensor changes its displayed state.
Table 1 Test Map
Setting Description
ON Runs the Dev motor & Fuser Motor
ON Runs the Fuser Motor only.
ON Runs the Developer Motor only.
FWD Runs the Fuser Motor forward
STOP Stops the Developer Motor & Fuser Motor.
ON Energizes the Solenoid on the First Cassette Feeder
(FCF). (200ms. timeout)
ON Energizes the Solenoid on the Multi-Purpose Feeder
(MPF). (200ms. timeout)
ON Switches on the Pre-Transfer Lamp (PTL).
ON Runs the Fuser Fan and the LSU fan.
ON Switches on the Fuser Heater.
(only when the fuser temp is less than the stand-by
temp)
CHECK Displays the FUSER ADC VALUE. See below for typi-
cal ADC conversions:
112 = 170C, 105 = 175C, 97 = 180C, 90 = 185C, 84 =
190C, 77 = 195C, 71 = 200C, 66 = 205C, 60 = 210C,
55 = 215C, 51 = 220C, 46 = 225C. Refer to GP 11 for
the correct fuser operating temperatures.
ON Runs the Polygon Mirror Motor in the LSU.
ON Switches on the LASER diode in the LSU.
CHECK Checks the time of LSU ready
The time in milliseconds, will be displayed after approx-
imately 10 seconds. The LSU ready time will include
500 milliseconds stabilisation time.
CHECK Checks the time of the LSU HSYNC (Horizontal Synch.
Signal).
The time in milliseconds, will be displayed after approx-
imately 10 seconds.
March 2004
6-3
Press Enter. The machine has now entered service (tech) mode.
Use the numbered keys to select the relevant test number. Use the left and right keys to
scroll through the available tests, refer to Figure 1. To view details of each test number.,
refer to Table 1 Test Map.
To exit engine test mode, switch off the machine, then switch on the machine.
Setting Description
OFF Stops the Dev motor & Fuser Motor
OFF Stops the Fuser Motor
OFF Stops the Developer Motor
RVS Runs the Fuser Motor in reverse
NEXT Go to next test item (FCF SOLENOID TEST).
OFF De-energizes the Solenoid on the FCF.
OFF De-energizes the Solenoid of the MPF.
OFF Switches off the PTL
OFF Stops the Fuser Fan and the LSU Fan motors
OFF Switches off the Fuser Heater.
NEXT Go to first test in sequence (ALL MOTOR TEST)
OFF Stops the Polygon Mirror Motor in the LSU.
OFF Switches off the LASER diode in the LSU
NEXT Go to next test (LSU HSYNC TEST)
NEXT Go to the next test (LSU MOTOR TEST)
General Procedures and Information
GP 1