Ricoh Mp C3000 Service Manual

Basic Operation 
SM 17 B789 
B789 
ARDF DF3000 
2.2 BASIC OPERATION 
2.2.1  ORIGINAL SET AND SIZE DETECTION 
 
The original set sensor [A] detects if the orig inal 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 mechani sm consists of the four original width sensors ([F]: Width 
Sensor S, [G]: Width Sensor M, [H] Width Sensor  L,...

Basic Operation 
B789 18  SM 
11 x 15/SEF ON ON ON  -  ON ON ON 1 - 
10 x 14/SEF  
ON  ON  -  -  ON  ON  ON  O  - 
8.5 x 14/SEF (LG)  ON  -  -  -  ON  ON  ON  O2 - 
8.5 x 13/SEF (F4)  ON  -  -  -  ON  ON  ON 2 O 
8.25 x 13/SEF  
ON        ON  ON  ON  -  - 
8 x 13/SEF (F) ON  -  -  -  ON  ON  ON  -  - 
8.5 x 11/SEF (LT)  ON  -  -  -  ON  -  -  O3 O6 
8.5 x 11/LEF (LT)  ON  ON  ON  -  -  -  -  O4 O7 
7.25 x 10.5/SEF (US 
EXE)  ON -  -  - ON -  - O - 
10.5 x 7.25/SEF (US 
EXE) ON ON ON  -  -  -  - 4 
- 
10...

Basic Operation 
SM 19 B789 
B789 
ARDF DF3000 
Document length detection 
From when the skew correction sens or switches on until it switches off, the CPU counts the 
transport motor pulses. The number of pulse s 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...

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 sol enoid 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...

Basic Operation 
SM 21 B789 
B789 
ARDF DF3000 
2.2.4 SKEW CORRECTION 
 
When an original is fed into t he feeder, the feed motor [B] rotate s forwards. At this time, the 
feed belt turns but the skew correction rolle r [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 origin al turns on the skew correction sensor [A], 
the feed motor [B] turns off for 40 ms and ro tates in...

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, t he feed and transport motors f eed the original through the 
scanning area at a lower speed (t he scanning area contains the original exposure guide [B] 
and DF exposure glass [C]). After scanning, the or iginal is fed out by the transport roller [D] 
and exit roller [E]. 
Double-Sided...

Basic Operation 
SM 23 B789 
B789 
ARDF DF3000 
towards the inverter table.  
Soon after the trailing edge of the original pa sses 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 reve rse. 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...

Basic Operation 
B789 24  SM 
The skew correction sensor does not turn off even if the original was 
fed by the maximum length of t he 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 r egistration 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 ex it sensor turned on. 
The skew correction sensor...

Dip Switches 
SM 25 B789 
B789 
ARDF DF3000 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...