AF SCANNING SECTION (RN20/21 Series)
[ 14 - 4 ]
2. AF Original Scanning Mechanism (with Automatic Base Control)
(This operation only occurs when the original scanning density is set to “Auto”.)
Once the AF original setting operation is complete, pressing the Start key illuminates the lamp.
The flatbed read pulse motor is activated immediately, moving the lamp carriage in the feed direction to
the shading position. Shading adjustment is performed before moving back in the return direction and
stopping at the ABC scanning position (3 + a) mm in front of the normal ABC scanning position.
At the same time, the AF read pulse motor rotates in the forward direction, turning the registration roller,
read roller, and original ejection roller in the feed direction. After the AF read sensor turns ON (light
blocked), the original is fed for a distance of 26.9 mm and stops. At this position, the image sensor scans
the surface density of the original. The FB read pulse motor then moves the lamp carriage back (3 + a)
mm in the return direction (normal AF original scanning position).
The AF read pulse motor rotates immediately in the forward direction and, at the same time, the print
signal turns ON and the original scanning operation starts.
When a preset length of time has elapsed after the AF read sensor turns OFF (receives light) due to the
passing of the original (or immediately when the write pulse motor rotates prior to the preset time for
paper-size adjustment according to the user setting), the print signal turns OFF. As soon as the scanning
operation is complete, the AF read pulse motor starts operating at high speed.
When the AF original ejection sensor turns OFF, the original is fed for a preset distance and then the AF
read pulse motor stops to end the AF read operation.
The auto-base control function is inactive in the Photo, Text/Photo, and Dot-screening modes.
* Compensation value a = Test Mode No. 184 (AF-ABC Mirror Position Adjustment)
Note: ABC stands for “Auto Base Control.”
Summary of Contents for RP-255
Page 22: ...MAINTENANCE 1 9 NOTE...
Page 27: ...MAINTENANCE 1 14 MEMO...
Page 45: ...MACHINE SUMMARY 2 8 Memo...
Page 50: ...MAIN DRIVE SECTION 3 5 Memo...
Page 83: ...FIRST PAPER FEED SECTION 4 26 Memo...
Page 108: ...PRESS SECTION 6 9 Memo...
Page 111: ...PRESS SECTION 6 12 Memo...
Page 169: ...PRINT DRUM SECTION 8 30 Memo...
Page 197: ...FB ORIGINAL SCANNING SECTION 11 2 Memo...
Page 213: ...FB ORIGINAL SCANNING SECTION 12 2 Memo...
Page 222: ...FB ORIGINAL SCANNING SECTION 12 11 Memo...
Page 271: ...AF SCANNING SECTION RN20 21 Series 14 18 Memo...
Page 295: ...MASTER MAKING SECTION 15 24...
Page 303: ...TIMING CHARTS 16 8 Memo...
Page 399: ...TEST MODE 18 32 Memo...
Page 405: ...MISCELLANEOUS PRECAUTIONS 19 6 Memo...
Page 423: ...ELECTRICAL DIAGRAMS RN25 Series 20 18 Memo...
Page 439: ...RISO Inc Technical Services Support US RISO COM ELECTRICAL DIAGRAMS RN20 21 Series 21 16 Memo...
Page 441: ...ELECTRICAL COMPONENTS 22 2 O A B C D E F G H I J K L M N 2201 2202 1 Motors...
Page 443: ...ELECTRICAL COMPONENTS 22 4 A B C D E 2203 2204 2 Fans Solenoids Electromagnetic Clutch...