Ricoh A217 Service Manual page 34

14 August 1997
Mode No.
Class 1 Class 2
7 *
8 *
4904 * 10
12 *
13 *
14 *
16 *
17 *
18 *
GA4 Setting Selects the image processing mode
(Image Process used for Letter areas in Letter/Photo
mode in Letter/ mode.
Photo mode:
0: 1 x 1 dot processing
Letter areas) 1: Error diffusion with 1 x 1 dot
2: 2 x 1 dot processing
3: Error diffusion with 2 x 1 dot
A larger value cases the image to
became lighter.
Only works if 4904-4 is at 0.
GA4 Setting Selects the image processing mode used for photo
(Image Process areas in the Letter/Photo mode.
mode in 0: 1 x 1 dot processing
Letter/Photo 1: Error diffusion with 1 x 1 dot processing
mode: Photo 2: 2 x 1 dot processing
Areas)
3: Error diffusion with 2 x 1 dot processing
A smaller value causes the image to become more
sharp in focus.
Only works if 4904-4 is at 0.
GA4 Setting Prints the test pattern for the GA4 IC, to test the GA4
(GA4 Test Data) chip on the EX-IPU.
0: No Print
1: Gradation
2: Cross
3: Black bands
GA4 Setting Changes the threshold level for
(BK Thresh binary picture processing mode.
Level)
A larger value causes the image to
become lighter.
GA4 Setting The value for pixels at an edge in
(Top point binary picture processing mode.
Level)
Do not change the value.
GA4 Setting The value for black areas in binary
(All Black Level) picture processing mode.
Do not change the value.
GA4 Setting The value for pixels at an edge in
(Print Top Point stamp mode.
Level)
Do not change the value.
GA4 Setting The value for black areas in stamp
(Print All Black mode.
Level)
Do not change the value.
GA4 Setting Selects the dither pattern used in
(Dither Pattern) binary picture processing mode.
Function
processing
processing
31
SP MODE
Settings
0 ~ 255
1 /step
40
0 ~ 255
1 /step
128
0 ~ 255
1 /step
255
0 ~ 255
1 /step
128
0 ~ 255
1 /step
255
0: 70-line
1: 95-line