Engine Test Mode - Samsung SCX-4720F Service Manual

6.5 Engine Test Mode

The Engine Test Mode supplies useful functions to check the condition of the print engine. It tests the con-
dition of each device and displays the result of the test on the LCD. It is divided into 5 functions (0~4), and
these are shown below.
6.5.1 To enter the Engine Test Mode
To enter the Engine Test mode
Press
'Engine Test', the machine has entered Engine Test Mode.
Press "0", "1", "2", "3" or "4" to select the Test No. (see list below – left hand column)
6.5.2 Diagnostic
NO. Sub No.
0 1
2
3
4
5
1 1
2
3
2 1
2
3
4
5
3 1
2
3
4
4 1
2
3
4
5
6
Samsung Electronics
Engine test
Motor Test
Pick Up Test
Fan Test
Manual Clt Test
PTL Test
LSU Motor Test
LSU Hsync Test
LD Test
Feed Sensor Test
Exit Sensor Test
Cover Sensor Test
Empty Sensor Test
Manual Sensor Text
Therm ADC 180
Therm ADC 140
Therm ADC 120
Therm ADC 100
MHV Test
Dev Bias Test
THV EN/NEG Test
THV ON (1300V)
THV ADC 1300V
THV ADC 600V~3500V
in sequence, and the LCD briefly displays
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1 : On, 2 : Off – next test selected
1. Check : read the sensor
2. Next : Next Sensor test
1. Check : read the sensor
2. Next : Next Sensor test
1. Check : read the sensor
2. Next : Next Sensor test
1. Check : read the sensor
2. Next : Next Sensor test
1. Check : read the sensor
2. Next : Next Sensor test
1 : On, 2 : Off (maintain the fusing temp. 80˚C)
1 : On, 2 : Off (maintain the fusing temp. 135˚C)
1 : On, 2 : Off (maintain the fusing temp. 160˚C)
1 : On, 2 : Off (maintain the fusing temp. 191˚C)
1 : On, 2 : Off (-1550V ± 50V)
1 : On, 2 : Off (-430V ± 20V)
1 : On, 2 : Off (-1200V +300V/-150V)
1 : On, 2 : Off (+1300V ± 20V)
1 : On, 2 : Off (ADC Value : 101 ± 5)
1 : On, 2 : Off (Compare each ADC Value)
Alignment & Adjustments
Remark
Service Manual
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