Ricoh MP C6502SP System Maintenance page 170

2. Main SP Tables-4
Leading Edge
Displays main scan white level average value (G leading edge) for CIS.
Checks errors for light source by scanning White basis roller witch is set to match CIS when
DF powers ON.
White basis roller's leading edge reading level from checking light source error will be
given.
001
Light source for CIS is made from 2sets of LED set to both leading/trail edge of main scan;
there for, detects error by checking main scan's both ends output level ratio.
When both ends scanning level ratio is abnormal, SC186-00(CIS Light source error) is
given.
Cause of error is shown in SP4-475-001.
Use for design evaluation, analyzing cause of malfunction (abnormal images, SC).
Trailing Edge
Displays main scan white level average value (G trailing edge) for CIS.
Checks errors for light source by scanning White basis roller witch is set to match CIS when
DF powers ON.
White basis roller's trailing edge reading level from checking light source error will be
given.
002
Light source for CIS is made from 2sets of LED set to both leading/trail edge of main scan;
there for, detects error by checking main scan's both ends output level ratio.
When both ends scanning level ratio is abnormal, SC186-00(CIS Light source error) is
given.
Cause of error is shown in SP4-475-001.
Use for design evaluation, analyzing cause of malfunction (abnormal images, SC).
[CIS M-Scan White Level: Avg. B]
4750
Displays main scan white level average value (B Leading edge / Trailing edge) for CIS.
168
ENG [0 to 255 / 0 / 1digit/step]
ENG [0 to 255 / 0 / 1digit/step]