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RA 1
SERVICE MANUAL Code Y101670-3
CONTENTS 1-1 Specifications 1-1-1 Part names ........................................................................................................................................... 1-1-1 1-1-2 Machine cross section .......................................................................................................................... 1-1-2 1-1-3 Drive system ........................................................................................................................................ 1-1-3
1-2 Installation 1-2-1 Unpacking ............................................................................................................................................ 1-2-1
1-3 Troubleshooting 1-3-1 Paper misfeed detection ...................................................................................................................... (1) Paper misfeed indication ............................................................................................................... (2) Paper misfeed detection conditions .............................................................................................. (3) Paper misfeeds ............................................................................................................................. 1-3-2 Electrical problems ............................................................................................................................... (1) The switchback conveying motor does not operate. ..................................................................... (2) The switchback eject motor does not operate. ............................................................................. (3) The feedshift solenoid does not operate. ...................................................................................... (4) The press solenoide does not operate. ........................................................................................ 1-3-3 Mechanical problems ........................................................................................................................... (1) Paper jams. ................................................................................................................................... (2) Abnormal noise is heard. ..............................................................................................................
1-3-1 1-3-1 1-3-2 1-3-3 1-3-4 1-3-4 1-3-4 1-3-4 1-3-4 1-3-5 1-3-5 1-3-5
2-1 Mechanical construction 2-1-1 Construction of each section ................................................................................................................ 2-1-1 (1) Paper switchback operation .......................................................................................................... 2-1-2
2-2 Electrical Parts Layout 2-2-1 Electrical parts layout ........................................................................................................................... (1) PCBs ............................................................................................................................................. (2) Switches and solenoids ................................................................................................................ (3) Motors ...........................................................................................................................................
2-2-1 2-2-1 2-2-2 2-2-3
2-3 Operation of the PCBs 2-3-1 Main PCB ............................................................................................................................................. 2-3-1
2-4 Appendixes Timing chart No. 1 .......................................................................................................................................... 2-4-1 Wiring diagram ............................................................................................................................................... 2-4-2
1-1-1
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1-1-1 Part names
Switchback unit
Switchback unit open/close lever
Figure 1-1-1
Y101670-3
Service Manual
1-1-1
1-1-2 Machine cross section
Switchback unit
Paper path
Figure 1-1-2
1-1-2
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1-1-3 Drive system
Figure 1-1-3 1 2 3 4
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Switchback motor gear Eject motor gear Gear 23/31 Gear 21
Service Manual
1-1-3
1-2-1 Unpacking
Figure 1-2-1 1 2 3 4 5 6 7
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Switchback unit Front cover Spacer Binding screws M3 × 08 Binding screws M4 × 06 TP screws M4 × 12 TP screws M4 × 16
Unpacking 8 Front bottom pad 9 Rear bottom pad 0 Upper pad ! Outer case @ Plastic bag # Plastic bag $ Bar-code labels
Service Manual
1-2-1
1-3-1 Paper misfeed detection (1) Paper misfeed indication When paper jams, the machine immediately stops operation and the occurrence of a paper jam is indicated on the copier operation panel. To remove the jammed paper, raise the switchback unit open/close lever and open the switchback unit. To reset the paper misfeed detection, open and close the switchback unit to turn the switchback unit safty switch off and on.
SBFISW
FSSW
SBESW
Figure 1-3-1 Paper misfeed detection
Y101670-3
Service Manual
1-3-1
(2) Paper misfeed detection condition • Misfeed in switchback section (jam code 53) The switchback eject switch (SBESW) does not turn off within 2797 ms of the copier feedshift switch (FSSW) turning on.
FSSW
OFF ON
SBESW
OFF ON 2798 ms
Timing chart 1-3-1 The switchback eject switch (SBESW) does not turn on within 3680 ms (6500 ms) of the switchback feed in switch (SBFISW) turning on. SBFISW
OFF ON
SBESW
OFF 3680 (6500) ms
ON
Paper size: A4R/81/2"×11" The value in the parentheses indicates A3/11"×17"
Timing chart 1-3-2 The switchback eject switch (SBESW) does not turn off within 1050 ms (2100 ms) of turning on. SBESW
1050 (2100) ms
OFF ON
Paper size: A4R/81/2"×11" The value in the parentheses indicates A3/11"×17"
Timing chart 1-3-3
1-3-2
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(3) Paper misfeeds Problem (1) Paper jams in the switchback unit when the main switch is turned on.
(2) Paper jams in the switchback section is indicated during copying (jam in switchback unit). Jam code 53
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Causes
Check procedures/corrective measures
A piece of paper torn from Remove any found. copy paper is caught around the switchback eject switch and switchback feed in switch. Defective switchback feed in switch.
With 5 V DC present at CN5-1 on the main PCB, check if CN5-3 on the main PCB remains high or low when the switchback feed in switch is turned on and off. If it does, replace the switchback feed in switch.
Defective switchback eject switch.
With 5 V DC present at CN5-2 on the main PCB, check if CN5-4 on the main PCB remains high or low when the switchback eject switch is turned on and off. If it does, replace the switchback eject switch.
Broken switchback eject switch actuator.
Check visually and replace the switchback eject switch if its actuator is broken.
Defective switchback feed in switch.
With 5 V DC present at CN5-1 on the main PCB, check if CN5-3 on the main PCB remains high or low when the switchback feed in switch is turned on and off. If it does, replace the switchback feed in switch.
Defective switchback eject switch.
With 5 V DC present at CN5-2 on the main PCB, check if CN5-4 on the main PCB remains high or low when the switchback eject switch is turned on and off. If it does, replace the switchback eject switch.
Service Manual
1-3-3
1-3-2 Electrical problems Problem
Causes Broken switchback conveying motor coil.
Check procedures/corrective measures Check for continuity across the coil. If none, replace the switchback conveying motor.
Poor contact of the switchback conveying motor connector terminals.
Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
(2) The switchback eject motor does not operate.
Broken switchback eject motor coil.
Check for continuity across the coil. If none, replace the switchback eject motor.
Poor contact of the switchback eject motor connector terminals.
Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
(3) The feedshift solenoid does not operate.
Broken feedshift solenoid coil.
Check for continuity across the coil. If none, replace the feedshift solenoid.
Poor contact of the feedshift solenoid connector terminals.
Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
(4) The press solenoide does not operate.
Broken press solenoid coil.
Check for continuity across the coil. If none, replace the press solenoid.
Poor contact of the press solenoid connector terminals.
Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.
(1) The switchback conveying motor does not operate.
1-3-4
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1-3-3 Mechanical problems Problem (1) Paper jams.
(2) Abnormal noise is heard.
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Causes/check procedures
Corrective measures
Check if the contact between the switchback press pulley and switchback press roller is correct.
Check and remedy.
Check if the contact between the switchback eject pulley and switchback eject roller is correct.
Check and remedy.
Check if the switchback press pulley, switchback press roller and gears operate smoothly.
Grease the bushings and gears.
Check if the switchback eject pulley, switchback eject roller and gears operate smoothly.
Grease the bushings and gears.
Service Manual
1-3-5
2-1-1 Construction of each section The switchback unit consists of the parts shown in Figure 2-1-1 and performs switchback operation for switching the ejection side of paper when ejecting paper to the saddle finisher.
1 2 3 4 5 6 7
Figure 2-1-1
SBFISW SBESW
Feedshift guide Switchback press roller Switchback press pulley Switchback eject roller Switchback eject pulley Switchback feed in switch Switchback eject switch
Switchback unit
CN5-3 CN5-4
Copier CN1-1CN1-12
MPCB
Figure 2-1-2 Switchback unit block diagram
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Service Manual
2-1-1
(1) Paper switchback operation Paper of which copying is complete is conveyed to the switchback unit and sent to the switchback section by the feedshift guide. In the switchback section, paper is conveyed by touching of the switchback press roller rotated by normal rotation of the switchback feed motor (SBFM), with the switchback press pulley activated by turning on the press solenoid (PRSOL). When a certain time (depending on the paper size) elapses, the switchback feed motor (SBFM) reverses the direction of rotation to reverse the rotation of the switchback press roller to switch the direction of paper conveyance. Paper that has been switched back is conveyed to the saddle finisher by the switchback eject roller rotated by turning on the switchback eject motor (SBEM) and the switchback eject pulley. At this time, the second paper is conveyed to the switchback unit, the press solenoid (PRSOL) is turned off, the switchback press pulley separates from the switchback press roller, and the first paper and the second paper are interchanged in the switchback section. (Depending on the copier model and the paper size, the press solenoid may not turn off and the switch press pulley may always touch the switchback press roller.)
Switchback eject roller
Feedshift guide
Switchback eject roller Entry second paper Eject first paper
(SBEM:ON)
(PRSOL:ON)
Switch back press pulley
Switchback press roller
(SBFM:fwd.)
(PRSOL:ON)
Switch back press pulley
(SBEM:ON)
Switchback press roller
(PRSOL:OFF)
Switchback press roller
(SBFM:fwd.)
(SBFM:rev.) Switch back press pulley
Paper path
Figure 2-1-3
2-1-2
Y101670-3
2-2-1 Electrical parts layout (1) PCBs
1
;
Machine front
Machine inside
Figure 2-2-1
Machine rear
PCBs
1. Main PCB (MPCB) ....................................... Controls the electrical components.
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Service Manual
2-2-1
(2) Switches and solenoids
2 3
4
1 5
;
Machine front
Machine inside
Machine rear
Figure 2-2-2 Switches and solenoids
1. 2. 3. 4. 5.
Safty switch (SSW) ...................................... Breaks the safty circuit when the switchback unit is opened. Switchback feed in switch (SBFISW) ........... Detects the presence of paper in the switchback unit. Switchback eject switch (SBESW) ............... Detects a paper misfeed in the switchback unit. Feedshift solenoid (FSSOL) ........................ Operates the feedshift guide. Press solenoid (PRSOL) .............................. Operates the switchback press solenoid.
2-2-2
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(3) Motors
1
2
;
Machine front
Machine inside
Figure 2-2-3
Machine rear
Motors
1. Switchback eject motor (SBEM) .................. Drives the switchback eject roller. 2. Switchback feed motor (SBFM) ................... Drives the switchback press roller.
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Service Manual
2-2-3
2-3-1 Main PCB
Main PCB 24 V Switchback conveying motor
Motor drive circuit
TXD
24 V
RXD Motor drive circuit
Switchback eject motor
Copier
24 V DC 5 V DC
CPU IC2
24 V Feedshift solenoid
5V Switchback feed in switch Switchback eject switch
24 V Press solenoid 24 V
Safty switch
Figure 2-3-1 Main PCB block diagram The main PCB (MPCB) consists mainly of the CPU IC2 and motor drive circuit. The CPU IC2 detects the condition of the switches and controls the motors and solenoids by serially communicating with the copier.
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Service Manual
2-3-1
CN3
CN1
CN5
CN2
CN4
Figure 2-3-2 Main PCB silk-screen diagram
Terminals (CN) 1-1 1-2 1-6 1-7 1-9 1-11 1-12 2-1 2-3 3-1 3-2 3-3 3-4 3-5 4-1 4-2 4-3 4-4 4-5 5-1 5-2 5-3 5-4 5-9 5-10 5-11 5-12 5-14
2-3-2
1-3 1-4 1-5 1-8 1-10 1-5 1-5 1-3 1-3 1-3 1-3 1-3 1-3 1-3 1-3 1-3 1-3 1-3 1-3 5-5 5-6 5-5 5-6 1-3 1-3 1-3 1-3 1-3
Voltage 24 V DC 24 V DC 5 V DC 0/5 V DC (pulse) 0/5 V DC (pulse) 0/5 V DC 0/5 V DC 24 V DC 0/24 V DC 0/24 V DC (pulse) 0/24 V DC (pulse) 0/24 V DC (pulse) 0/24 V DC (pulse) 24 V DC 0/24 V DC (pulse) 0/24 V DC (pulse) 0/24 V DC (pulse) 0/24 V DC (pulse) 24 V DC 5 V DC 5 V DC 0/5 V DC 0/5 V DC 24 V DC 0/24 V DC 24 V DC 0/24 V DC 0/24 V DC
Remarks 24 V DC supply, input 24 V DC supply, input 5 V DC supply, input Sirial signal TXD, output Sirial signal RXD, input RESET signal, input Switchback unit SET signal, output 24 V DC supply for SSW, output SSW on/off, input SBEM coil energization pulse, output (A) SBEM coil energization pulse, output (A) SBEM coil energization pulse, output (B) SBEM coil energization pulse, output (B) 24 V DC supply for SBEM, output SBFM coil energization pulse, output (A) SBFM coil energization pulse, output (A) SBFM coil energization pulse, output (B) SBFM coil energization pulse, output (B) 24 V DC supply for SBFM, output 5 V DC supply for SBFISW, output 5 V DC supply for SBESW, output SBFISW on/off, input SBESW on/off, input 24 V DC supply for FSSOL, output FSSOL on/off signal, output 24 V DC supply for PRSOL, output PRSOL acutuate signal, output PRSOL release signal, output
Y101670-3
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Service Manual
2-4-1
CN4-1,2,3,4
SBFM
CN4-1,2,3,4
SBFM
PRSOL CN5-14 (acutuate)
PRSOL CN5-12 (release)
CN3-1,2,3,4
SBEM
SBESW CN5-4
SBFISW CN5-3
Copying start
Copying start
Fwd. rotation
First paper
Fwd. rotation
First paper
Rev. rotation
Rev. rotation
Rev. rotation
Fwd. rotation
Second paper
Fwd. rotation
Second paper
Rev. rotation
Fwd. rotation
The timing of all the motors and the solenoids is controlled based on the ON edge of the switchback feed in switch (SBFISW) as the starting point.
• Paper size: A3/11" × 17"
PRSOL CN5-14 (acutuate)
PRSOL CN5-12 (release)
CN3-1,2,3,4
SBEM
SBESW CN5-4
SBFISW CN5-3
• Paper size: A4R/81/2" × 11"
Timing chart No. 1
Fwd. rotation
2-4-2
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7
6
5
4
3
2
1
A
A
B
B
OE:C201-1 OE:C202-2 LB:C201-2 LB:C202-3 BE:C201-3 BE:C202-1
Wiring diagram
CN5:C105 1 5V 2 5V 3 SBFISW 4 SBESW 5 SG 6 SG 7 8 9 R24 V 10 FSSOL ACT 11 R24 V 12 PRSOL ACT 13 14 PRSOL REF
C
C201 15V 2 SBFISW 3 SG
SBESW
OE:C105-1 LB:C105-3 BE:C105-5
RD:C203-2 YW:C203-1 RD:C204-3 YW:C204-2
SBFISW
YW:C204-1
C202 1 SG 25V 3 SBESW
C
BE:C105-6 OE:C105-2 LB:C105-4
D
1
MPCB
D
CN4:C104 1 SBFM A 2 SBFM A_ 3 SBFM B 4 SBFM B_ 5 COM(24V) 6
2 3 4 5
SBFM
6
E 2 3 4 5 6
SBEM
F
FSSOL
C203 RD:C105-9 2 1 R24 V YW:C105-10 1 2 FSSOL ACT
1
PRSOL
C204 RD:C105-11 3 1 R24 V YW:C105-12 2 2 PRSOL ACT YW:C105-14 1 3 PRSOL REF
F
1 2
SSW
R24 V
E
CN3:C103 1 SBEM A 2 SBEM A_ 3 SBEM B 4 SBEM B_ 5 COM(24V) 6
CN2:C102 1 24 V 3
G
G
1 2 3 4 5 6 7 8 9 10 11 12 24 V 24 V PG PG SG 5V TXD SG RXD SG RESET SET
H
H
6 5 4 3 2 1 6 5 4 3 2 1
I
Copier
I
J
J
8
7
6
5
4
3
2
1
UPD ATING ST ATUS UPDA STA
DATE
11/2001
UPDATED PAGES
1st EDITION
PAGES
25
CODE
Y101670-3
