Dell 1815DN service manual Machine Test, Select the Adjust Shading at

Alignment & Adjustments

6.4.4 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 malfunctioned.

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 poor , perform this function to check the condition CCD unit.

< 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 PRO- FILE will be print out.

4. If the printed image is dif ferent to the image, the CCD is defect.

NOTICE : When you test CCD, make sure that the cover is closed.

Service Manual 6-15