To Enter The Engine Test Mode; Diagnostic - Samsung SCX-4521F Series Service Manual

Alignment and Adjustments
4.5 Engine Test Mode
The Engine Test Mode supplies useful functions to check the condition of the print engine. It tests the condition 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.

4.5.1 To enter the Engine Test Mode

To enter the Engine Test mode (SCX-4521F)
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)
To enter the Engine Test mode (SCX-4321)
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)

4.5.2 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
Service Manual
4-19
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
in sequence, and the LCD briefly displays
Remark
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)
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