Machine Test - Samsung SCX-4216F Service Manual

ALIGNMENT & ADJUSTMENTS

6.5.4 Machine Test

SWITCH TEST
Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window
each time you press a key.
MODEM TEST
Use this feature to hear various transmission signals to the telephone line from the modem and to check
the
modem. If no transmission signal sound is heard, it means the modem part of the main board malfunc-
tioned.
DRAM TEST
Use this feature to test the machine's DRAM. The result appears in the LCD display.
If all memory is working normally, the LCD shows << O K >>
ROM TEST
Use this feature to test the machine'S ROM. The result and the software version appear in the LCD display.
• FLASH VER : 1.00 V
• ENGINE VER :1.00V
PATTERN TEST
Using this pattern printout, you can check if the printer mechanism is functioning properly.
It is needed in the production progress. Service person doesn't need to use it.
SHADING TEST
The function is to get the optimum scan quality by the specific character of the CCD(Charge Coupled
Device). If the copy image quality is unsatisfied, perform the function to check the condition of the print out
for checking whether or there is CCD trouble.
< Method >
1. Select the [ADJUST SHADING] at the TECH
MODE.
2. Push the SET UP button then an image will
be scanned.
3. After the scan, CCD SHADING PROFILE will
be print out.
4. If the printed image is different to the image,
the CCD is defect.
NOTICE : When you test CCD, make sure that
the cover is closed.
Service Manual
6-14
Samsung Electronics