Ricoh B230 Service Manual
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![Page 1119
Basic Operation
SM 17 B789
B789
2.2 BASIC OPERATION
2.2.1 ORIGINAL SET AND SIZE DETECTION
The original set sensor [A] detects if the original is set or not. The original sensor [B]
detects if the original is on the original tray or not (this lets the machine know as early as
possible, whether there is another original on the tray).
The original size detection mechanism consists of the four original width sensors ([F]:
Width Sensor S, [G]: Width Sensor M, [H] Width Sensor L, [I]: Width Sensor...](http://img.usermanuals.tech/thumb/64/100811/w64_b230-service-manual-1509630901_d-1118.png "Page 1119
Basic Operation
SM 17 B789
B789
2.2 BASIC OPERATION
2.2.1 ORIGINAL SET AND SIZE DETECTION
The original set sensor [A] detects if the original is set or not. The original sensor [B]
detects if the original is on the original tray or not (this lets the machine know as early as
possible, whether there is another original on the tray).
The original size detection mechanism consists of the four original width sensors ([F]:
Width Sensor S, [G]: Width Sensor M, [H] Width Sensor L, [I]: Width Sensor...")
![Page 1122
Basic Operation
B789 20 SM
2.2.3 PICK-UP AND SEPARATION
The original is set with the image facing up. The original pushes actuator and the original
set sensor is activated.
After pressing the start button, the feed clutch is activated and the original feed unit [A]
moves down. At the same time, the pick-up solenoid is activated and the original table lifts
until the original comes in contact with the pick-up roller [B]. The pick-up roller then feeds
the top sheet of paper.
After being fed...](http://img.usermanuals.tech/thumb/64/100811/w64_b230-service-manual-1509630901_d-1121.png "Page 1122
Basic Operation
B789 20 SM
2.2.3 PICK-UP AND SEPARATION
The original is set with the image facing up. The original pushes actuator and the original
set sensor is activated.
After pressing the start button, the feed clutch is activated and the original feed unit [A]
moves down. At the same time, the pick-up solenoid is activated and the original table lifts
until the original comes in contact with the pick-up roller [B]. The pick-up roller then feeds
the top sheet of paper.
After being fed...")
![Page 1123
Basic Operation
SM 21 B789
B789
2.2.4 SKEW CORRECTION
When an original is fed into the feeder, the feed motor [B] rotates forwards. At this time,
the feed belt turns but the skew correction roller [C] does not. Because of this, when the
leading edge of the paper gets to the skew correction roller, skew in the original is
removed.
A short time after the leading edge of the original turns on the skew correction sensor [A],
the feed motor [B] turns off for 40 ms and rotates in reverse. At this...](http://img.usermanuals.tech/thumb/64/100811/w64_b230-service-manual-1509630901_d-1122.png "Page 1123
Basic Operation
SM 21 B789
B789
2.2.4 SKEW CORRECTION
When an original is fed into the feeder, the feed motor [B] rotates forwards. At this time,
the feed belt turns but the skew correction roller [C] does not. Because of this, when the
leading edge of the paper gets to the skew correction roller, skew in the original is
removed.
A short time after the leading edge of the original turns on the skew correction sensor [A],
the feed motor [B] turns off for 40 ms and rotates in reverse. At this...")
![Page 1124
Basic Operation
B789 22 SM
2.2.5 ORIGINAL TRANSPORT AND EXIT
Single-Sided Originals
The feed motor feeds the separated original to the skew correction roller [A] at maximum
speed. After skew correction, the feed and transport motors feed the original through the
scanning area at a lower speed (the scanning area contains the original exposure guide
[B] and DF exposure glass [C]). After scanning, the original is fed out by the transport
roller [D] and exit roller [E].
Double-Sided Originals...](http://img.usermanuals.tech/thumb/64/100811/w64_b230-service-manual-1509630901_d-1123.png "Page 1124
Basic Operation
B789 22 SM
2.2.5 ORIGINAL TRANSPORT AND EXIT
Single-Sided Originals
The feed motor feeds the separated original to the skew correction roller [A] at maximum
speed. After skew correction, the feed and transport motors feed the original through the
scanning area at a lower speed (the scanning area contains the original exposure guide
[B] and DF exposure glass [C]). After scanning, the original is fed out by the transport
roller [D] and exit roller [E].
Double-Sided Originals...")
![Page 1125
Basic Operation
SM 23 B789
B789
towards the inverter table.
Soon after the trailing edge of the original passes the exit sensor, the junction gate
solenoid switches off and the junction gate [E] is closed. When the original has been fed
onto the inverter table, the feed motor switches on in reverse. The original is then fed by
the inverter roller [F], and then by the skew correction roller [A] and registration roller [B] to
the scanning area (where the reverse side will be scanned).
The...](http://img.usermanuals.tech/thumb/64/100811/w64_b230-service-manual-1509630901_d-1124.png "Page 1125
Basic Operation
SM 23 B789
B789
towards the inverter table.
Soon after the trailing edge of the original passes the exit sensor, the junction gate
solenoid switches off and the junction gate [E] is closed. When the original has been fed
onto the inverter table, the feed motor switches on in reverse. The original is then fed by
the inverter roller [F], and then by the skew correction roller [A] and registration roller [B] to
the scanning area (where the reverse side will be scanned).
The...")
Basic Operation SM 19 B789 B789 Document length detection From when the skew correction sensor switches on until it switches off, the CPU counts the transport motor pulses. The number of pulses determines the length of the original. Feed-in cycle When the original size for the copy modes listed below cannot be determined, the image cannot be correctly scaled (reduced or enlarged) or processed until the original’s length has been accurately detected. The length must be determined before the image is scanned. Auto Reduce/Enlarge Centering Erase Center/Border Booklet Image Repeat The originals follow this path: 1. Length detection Scanning glass Inverter table 2. Inverter table Scanning glass Inverter table (restores the original order) 3. Inverter table Scanning glass (image scanned) Exit tray Normal feed-in In a copy mode other than those listed above, when the reduction/enlargement ratio has been determined, the originals are scanned normally. In order to store the scanned images, a large area of memory (the detected original width x 432 mm length) is prepared. Next, only the portion of the image up to the detected original length is read from memory and printed.
Basic Operation B789 20 SM 2.2.3 PICK-UP AND SEPARATION The original is set with the image facing up. The original pushes actuator and the original set sensor is activated. After pressing the start button, the feed clutch is activated and the original feed unit [A] moves down. At the same time, the pick-up solenoid is activated and the original table lifts until the original comes in contact with the pick-up roller [B]. The pick-up roller then feeds the top sheet of paper. After being fed from feed belt [C], the topmost sheet is separated from the stack by the separation roller [D] and sent to the skew correction roller. The mechanism is an FRR system, consisting of the original feed belt [C] and separation roller [D].
Basic Operation SM 21 B789 B789 2.2.4 SKEW CORRECTION When an original is fed into the feeder, the feed motor [B] rotates forwards. At this time, the feed belt turns but the skew correction roller [C] does not. Because of this, when the leading edge of the paper gets to the skew correction roller, skew in the original is removed. A short time after the leading edge of the original turns on the skew correction sensor [A], the feed motor [B] turns off for 40 ms and rotates in reverse. At this time, the skew correction roller [C] and the feed belt both turn, and original feed continues. The original is fed by the skew correction roller after the feed clutch [D] has turned off.
Basic Operation B789 22 SM 2.2.5 ORIGINAL TRANSPORT AND EXIT Single-Sided Originals The feed motor feeds the separated original to the skew correction roller [A] at maximum speed. After skew correction, the feed and transport motors feed the original through the scanning area at a lower speed (the scanning area contains the original exposure guide [B] and DF exposure glass [C]). After scanning, the original is fed out by the transport roller [D] and exit roller [E]. Double-Sided Originals After skew correction, the feed and transport motors drive the skew correction roller [A], registration roller [B], transport roller [C] and the exit roller [D]. The front side of the original is then scanned. When the original exit sensor detects the leading edge of the original, the junction gate solenoid is activated and the junction gate [E] opens. The original is then transported
Basic Operation SM 23 B789 B789 towards the inverter table. Soon after the trailing edge of the original passes the exit sensor, the junction gate solenoid switches off and the junction gate [E] is closed. When the original has been fed onto the inverter table, the feed motor switches on in reverse. The original is then fed by the inverter roller [F], and then by the skew correction roller [A] and registration roller [B] to the scanning area (where the reverse side will be scanned). The original is then sent to the inverter table again to be turned over. This is done so that the duplex copies will be properly stacked front side down in the exit tray [G] in the correct order. Original Sensor During one-to-one copying, copy paper is fed to the skew correction roller in advance (while the original is still being scanned), to increase the copy speed. The original sensor monitors the stack of originals in the feeder, and detects when the trailing edge of the last page has been fed in. The main CPU then stops the copier from feeding an unwanted extra sheet of copy paper. 2.2.6 CONDITIONS FOR JAM DETECTION Jam Mode Detection Timing When turning on the machine, the skew correction sensor, registration sensor or exit sensor detects an original. When the cover is closed or DF is down, the skew correction sensor, registration sensor or exit sensor detects an original. Initial When the cover is opened or DF is lifted up, the skew correction sensor, registration sensor or exit sensor detects an original.
Basic Operation B789 24 SM The skew correction sensor does not turn off even if the original was fed by the maximum length of the original + 150 mm after the skew correction sensor turned on. The registration sensor does not turn off even if the original was fed by its length x 1.5 after the registration sensor turned on. Sensor stays on too long The exit sensor does not turn off even if the original was fed by its length x 1.5 after the exit sensor turned on. The skew correction sensor does not turn on even if the original was fed by transport path length x 1.5. The registration sensor does not turn on even if the original was fed by transport path length x 1.5 after the skew correction sensor turned on. Sensor does not come on The exit sensor does not turn on even the original was fed by transport path length x 1.5 after the skew correction sensor turned on.
Dip Switches SM 25 B789 B789 3. SERVICE TABLES 3.1 DIP SWITCHES DIP-SW 1 2 3 4 Function 0 0 0 0 Normal operating mode (Default) 0 0 0 1 Free run: With original: One-sided mode: 100% speed 0 0 1 0 Free run: With original: Two-sided mode: 100% speed 0 0 1 1 Free run: No original: One-sided mode: 100% speed 0 1 0 0 Free run: No original: Two-sided mode: 100% speed 0 1 0 1 Free run: With original: One-sided mode: 32% speed 0 1 1 0 Free run: With original: Two-sided mode: 32% speed 0 1 1 1 Free run: With original: One-sided mode: 70% speed 1 0 0 0 Free run: With original: Two-sided mode: 70% speed 1 0 0 1 Free run: With original: One-sided mode: 200% speed 1 0 1 0 Free run: With original: Two-sided mode: 200% speed 1 0 1 1 Transport Motor On 1 1 0 0 Feed Motor On 1 1 0 1 Transport Motor On with random mode 1 1 1 0 Feed Motor On with random mode 1 1 1 1