Brother CB200, Service Manual

Page: 66 / 92

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4.3.2 Scanning contrast adjustment [Function code 07]
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Function
This function allows you to adjust the scanning contrast to five levels from 0 to 4 for monochrome
scanning. The contrast level refers to the threshold value of brightness to be applied for 2-value
quantization when the CIS scans images drawn on the copyboard screen.
The default scanning level is 2.
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Operating Procedure
(1) Open the paper compartment cover and hold down the COPY ALL and FEED keys for 15
seconds.
(2) Press the COPY key with the paper compartment cover opened.
The ERROR LED stops flashing for one second and then starts flashing again.
(3) Press the COPY key to show the current scanning contrast.
Then, the machine shows the current contrast by using the ERROR and PAPER LEDs as
shown below.
Contrast Indication by ERROR and PAPER LEDs
If the LEDs flash in the cycle below:
The current contrast level is:
ERROR ON once and PAPER ON four times* 0 (Light)
ERROR ON two times and PAPER ON three times 1
ERROR ON three times and PAPER ON two times 2
ERROR ON four times and PAPER ON once 3
ERROR ON five times 4 (Dark)
(*Example: Contrast level 0)
(4) To decrease the contrast, press the COPY ALL key; to increase it, press the FEED key.
(5) Press the COPY key.
The new setting will be fixed and the machine returns to the regular operation mode.