Adjustment; Elevator Upper-Limit Sensor Position Adjustment; Paper Feed Clutch Off Angle Adjustment; Paper Feed Clutch On Angle Adjustment - Riso CZ180 Series Technical Manual

CHAPTER 4: FIRST PAPER FEED

ADJUSTMENT

1. Elevator Upper-limit Sensor Position Adjustment

) Remove all the papers from the Paper feed tray and slide the Paper feed pressure adjustment
lever to the NORMAL position.
2) Raise the Paper feed tray all the way up, using Test Mode No.68 (Paper feed tray elevation).
3) After the Paper feed tray stops at the upper limit position, measure the space between the Pickup
roller and Paper feed tray. The measurement of the space should be .8mm plus or minus 0.3mm.
4) If the measurement is not within the set value, remove the Master disposal box and Master
removal lower cover.
5) Loosen the mounting screw of the Upper limit sensor bracket and slide the sensor bracket up or
down to make the adjustment.
Precaution in Adjustment
) The space to check is the gap between the Paper feed tray and Pickup roller. Do not confuse the
Scraper roller with the Pickup roller.
Results of incorrect adjustment
) If the gap is too small, the paper feed pressure becomes too high. This may result in multiple
feeding of papers.
2) On the contrary, if the gap is too big, the paper feed pressure becomes too weak. This may result
in paper not feeding at all.

2. Paper Feed Clutch OFF Angle Adjustment

1) Perform printing and confirm that the paper is fed smoothly into the second paper feed area.
2) If the paper buckle made before the Timing and Guide rollers is too less or too much, the paper
may not feed smoothly and cause print registration problem.
Test Mode No.742 (Paper feed clutch OFF angle adjustment) and make an adjustment.
3) Refer to the Chapter on the Test Modes for the details on Test Mode No.742
4) Repeat from step () until good result is obtained.
Results of incorrect adjustment
) Too much or too little paper buckle at the Timing and Guide rollers may result in paper jamming
at second paper feed area and/or print registration problem.

3. Paper Feed Clutch ON Angle Adjustment

1) Perform printing and confirm that the paper feeds smoothly through the first paper feed area.
2) If the paper feed timing is not smooth through the first paper feed area, activate Test Mode
No.74 (Paper feed clutch OFF angle adjustment) and make an adjustment.
3) Repeat from step () until good result is obtained.
Results of incorrect adjustment
1) Incorrect paper feed timing at the first paper feed area may result in paper jamming or print
registration problem.
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