SECOND PAPER FEED SECTION

CONTENTS

1. Theory of Operation ...5-3 1. Second Paper Feed Drive Mechanism ... 5-3 2. Vertical Printing Position ...5-4 2. Removal and Assembly ...5-5 1. Load Spring ...5-5 2. Timing Clutch ...5-6 3. Paper Guide Plate ...5-7 4. Paper Gate ...5-8 5. Timing Roller/ Guide Roller ...5-9 3. Adjustment ...5-10 1. Print Position (Timing Clutch ON timing) ... 5-10

[ 5-2 ] 5-2 ] KZ30 (Rev. 1.2)

MEMO

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1. Theory of Operation

1. Second Paper Feed Drive Mechanism

1. Drive

> Timing clutchmakes clockwise rotation (looking from the rear of machine) with the turn of the Main motor.

> The Timing gear rotation is transferred to the Timing gear via the Timing clutch.

> The Timing roller rotates Guide roller.

2. Timing Clutch

> After given time from the end of the first paper feed, the Timing clutch activates to rotate the Timing roller.

3. Timing Roller

> The Timing roller contains Load spring which applies brake on the roller at all times.

It stops the rotation of the roller as soon as the Timing clutch goes off.

4. Guide Roller

> The Guide roller is always in contact with the Timing roller.

> The rotation of the Guide roller is received from the Timing roller.

> The Guide roller rotation stops when the Timing clutch goes off to stop the Timing roller.

Paper gate

Guide roller Timing roller Load spring

[ 5-4 ] 5-4 ] KZ30 (Rev. 1.2)

2. Vertical Printing Position

1. Timing Clutch

> The print position is depending on when the Timing clutch goes on.

> Normally the Timing clutch goes ON when the drum angle becomes 160.3 degrees and goes OFF when the drum angle becomes 61.3 degrees in case the drum speed is 60 r.p.m.

> When the drum rotation speed is 90 r.p.m., the Timing clutch goes ON at the drum angle 157.7 degrees and goes OFF at the drum angle 58.7 degrees.

2.Print Position

Paper feed clutch 1st

Paper feed clutch 2nd

Paper gate

2. Removal and Assembly

1. Load Spring

1. Tun OFF the machine power and disconnect the power cord from the machine.

2. Remove Front cover.

3. Remove Print drum.

4. Remove E-ring and Washer from the Timing roller shaft.

6. Remove the Load spring from the shaft.

Precaution in Assembly

> Install the Load spring in the correct direction.

Load spring

[ 5-6 ] 5-6 ] KZ30 (Rev. 1.2)

2. Timing Clutch

1. Turn OFF the machine power and disconnect power cord from the machine.

2. Remove Rear cover.

3. Remove the Timing clutch support plate. (4 screws) 4. Disconnect connector and remove the Timing clutch.

Caution in Assembly

> Make sure to lock the hook on the Timing clutch into the clutch lock hole to prevent clutch body from rotating.

Timing clutch support plate Timing clutch

Hook on the timing clutch

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3. Paper Guide Plate

1. Turn OFF the machine power and disconnect the power cord from the machine.

2. Remove following parts from the machine.

> Rear cover

> Paper feed tray unit

> Paper feed clutch with the bracket

> Pick up roller assembly

> Print drum

3. Remove the Paper guide plate upper. (2 screws)

4. Remove 2 mounting screws from the Paper guide plate lower.

5. Slide out the Master removal unit and remove the Paper gate. (1 screw)

6. Take out the Paper guide plate lower from the the Paper feed tray side while raising the Guide roller by hand.

Paper feed tray

Paper guide plate upper Paper guide plate lower

Paper gate

Paper feed clutch

Pickup roller assembly

[ 5-8 ] 5-8 ] KZ30 (Rev. 1.2)

4. Paper Gate

1. Turn OFF the machine power and disconnect power cord from the machine.

2. Remove the Print drum.

3. Slide out the Master removal unit.

4. Remove the mounting screw of the Paper gate and remove the Paper gate.

Precautions before Assembly

> Do not secure the mounting screw too much to prevent the plastic Paper gate from breakage.

Mounting screw

Paper gate

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5. Timing Roller / Guide Roller

1. Disconnect the power supply from the machine.

2. Remove the Print drum.

3. Remove the Paper guide plate (upper & lower).

4. Remove the Paper gate.

5. Remove following parts from the Timing roller shaft.

> Load spring

> One-way gear and Metal 6. Remove the Timing roller

7. After removing the Timing roller, remove the E-rings and Bushings from both sides of the Guide roller shaft.

8. Remove the Guide roller assembly.

Precaution in Assembly

> Install the Load spring [G] in the correct direction.

> Check if paper is fed correctly or not after assembled all parts. If not, disassemble all parts again and then re-assemble the parts.

Bushing (short)

[ 5-10 ] 5-10 ] KZ30 (Rev. 1.2)

3. Adjustment

1. Print Position (Timing Clutch ON timing)

Vertical print position can be adjusted by changing the Timing clutch activate timing.

The Timing clutch activate timing can be changed by using TEST MODE No.789 or No.791.

Test No.789 is for when the machine runs at 60 r.p.m. and Test No.791 is for when the machine runs at 90 r.p.m..

Adjustment Procedure

1. Turn OFF the machine power.

2. Go into Test Mode by turning the machine power ON by pressing and key on the control panel.

3. With B4 size paper on teh paper feed tray, enter Test Mode No.80 to make a master with checker- flag image.

4. Press [Reset] key to escape from the Test Mode. Make about 5 prints at speed No.1 (60 r.p.m) and another 5 prints at speed No.2 (90 r.p.m.).

5. For the both set of prints, measure the distance from the top of the paper to where the print image starts.

6. The image should print 10mm from the top edge of the papers. If not, adjustments using Test Modes No.789 and/or No.791 is necessary.

7. In the case the white margin is less than 10mm, smaller parameter number should be input for those test modes. Smaller parameter numbers make the Timing clutch ON timing faster and increase the white margin.

8. In the case the white margin is more than 10mm, larger parameter number should be input for those test modes. Larger parameter numbers make the Timing clutch ON timing to delay and decrease the white margin.

Result of Incorrect Adjustment

> Incorrect adjustment may cause blurry top image, stained pressure roller caused by image shifting down on the paper, or paper not separated from the Print drum (paper jam) caused by too small white margin on the top of the paper.

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