Samsung SCX-4321, Руководство по обслуживанию

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Alignment and Adjustments
Samsung Electronics
Service Manual
4-12
4.2.5 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, amplifier and speaker. If no transmission signal sound is heard, it means the
modem part of the main board, amplifier, speaker or speaker harness is faulty.
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 that the printer mechanism is functioning properly.
This function is for factory manufacturing use only.
SHADING TEST
The function is used to set the optimum scan quality determined by the specific characteristics of the
CIS(Contact Image Sensor). If copy image quality is poor perform this function to check the
condition of the CIS unit.
< Method >
1. Select the [Shading Test] in TECH MODE
(Menu, #, 1934).
2. Push the ENTER button and an image will
be scanned.
3. After scanning the CIS SHADING PROFILE
will be print out.
4. If the printed image is different to the
sample image shown the CIS is defective.
NOTICE : When you test the CIS, make
sure that the cover is closed.
MAX=229 Min=168 Avg=193 Diff=15 PRNU=6
MAX=234 Min=174 Avg=200 Diff=14 PRNU=7
MAX=241 Min=179 Avg=204 Diff=14 PRNU=4
MAX=240 Min=176 Avg=202 Diff=15 PRNU=6