Ricoh FT4220.22 DUPLEX
DUPLEX
1 May 1993 SPECIFICATIONS
1. SPECIFICATIONS
Copy Paper Size: A4/81/2" x 11" (sideways)
Paper Weight: 58 to 104 g/m2 (16 to 28 lb)
Paper Stack: 50 sheets
Dimension
(W x D x H):
516 x 529 x 90 mm
(20.4" x 20.9" x 3.6")
Weight: Approximately 5 kg (11 lb)
• Specifications are subje ct to change witho ut notice.
Duplex
1
COMPONENT LAYOUT 1 May 1993
2. COMPONENT LAYOUT
– Mechanical Components –
2
3
1
8
5
4
1011
1. Duplex Gate Roller 7. Paper Flattener
2. Duplex Gate 8. Duplex Feed Roller
3. Turn Guide Plate 9. Friction Roller
4. Transport Roller 10. Duplex Bottom Plate
5. Entrance Roller 11. Jogger Fences
6. Paper End Feeler
– Electrical Components –
2
3
4
7
6
5
9
1
7
8
1. Duplex Main Board 5. Duplex Entrance Sensor
2. Jogger Motor 6. Duplex Paper End Sensor
3. Jogger HP Sensor 7. Duplex Turn Sensor
4. Duplex Gate Solenoid 8. Duplex Feed Motor
2
6
1 May 1993 ELECTRICAL COMPONENT DESCRIPTION
3. ELECTRICAL COMPONENT DESCRIPTION
Symbol Name Function Index No.
Motors
M1 Duplex Feed Motor Stepper motor (24 Vdc) drives feed roller
and moves the bottom plate up and down.
M2 Jogger Motor Stepper motor (24 Vdc) drives the jogger
fences to square the paper stack on the
duplex tray.
Solenoid
SOL 1 Duplex Gate
Solenoid
Sensors
S1 Duplex Entrance
Sensor
S2 Duplex Turn Sensor Detects copy in the turn section. 7
S3 Duplex Paper End
Sensor
S4 Jogger Home
Position Sensor
Moves the duplex gate to direct copies to the
duplex tray or to the paper exit.
Detects copy at the entrance. 5
Detects copy in the duplex tray. 6
Detects whether the jogger fences are at
home position.
8
2
4
3
Printed Circuit Board
PCB1 Duplex Main Board Controls all duplex unit functions. 1
Duplex
3
POWER DISTRIBUTION AND OVERALL MACHINE CONTROL 1 May 1993
4. POWER DISTRIBUTION AND OVERALL
MACHINE CONTROL
4.1 A110 COPIER
AC Drive Board
(PCB2)
Option Transformer
(TR2)
Option DC Power
Supply Board (PCB6)
115Vac
220/230/240Vac
TXD
RXD TXD
Copier Main Board (PCB1) Duplex Main Board (PCB1)
26Vac
10Vac
Reset Signal
RXD
+24V
(VA)
+5V
(VC)
+24V (VA)
+5V (VC)
Mortors
Solenoid
Sensors
When the main switch is turned on, the option transf orme r receive s wall
outlet ac power thro ugh the ac drive board and outputs 1 0 volt s ac and 26
volts ac to the option dc power supply boa rd. The option dc power supply
board then converts the 10 volts ac to +5 volts an d the 26 volts ac to +24
volts. Then, the +5 volt s and +24 volts are supplied to the duplex main boar d.
The copier main board sends a reset signal to the duplex main board to
initialize the duplex CPU.
The duplex main board supplies dc power to all electrical components in the
duplex unit. All motors and solen oid operate on +24 volts and all sensors
operate on +5 volts.
The duplex main board has its own CPU wh ich con tro ls a ll fun ctio ns in th e
duplex unit. The duplex CPU commun icat es with the copier main board using
a serial interface.
4
1 May 1993 POWER DISTRIBUTION AND OVERALL MACHINE CONTROL
4.2 A111 COPIER
AC Drive Board
(PCB2)
Main Transformer
(TR1)
Main DC Power
Supply Board (PCB3)
Mortors
Solenoid
Sensors
115Vac
220/230/240Vac
+24V (VA)
+5V (VC)
Duplex Main Board (PCB1)
RXD
TXD
31Vac
10Vac
Reset Signal
+24V (VA)
+5V (VC)
+24V
(VA)
TXD
RXD
Copier Main Board (PCB1)
+5V
(VC)
When the main switch is turned on, th e main transformer receives wall outlet
ac power through th e ac drive boa rd an d outputs 10 volts ac and 31 volts ac
to the main dc power supply board. The main dc power supply board then
convers the 10 volts ac to +5 volts and the 31 volts ac t o +24 volts. Then, +5
volts and +24 volts are supplied to the duplex main board thro ug h th e copier
main board. The copier main board sends a reset signal to the duplex main
board to initialize the duplex CPU.
The duplex main board supplies dc power to all electrical components in the
duplex unit. All motors and solen oid operate on +24 volts and all sensors
operate on +5 volts.
The duplex main board has its own CPU wh ich con tro ls a ll fun ctio ns in th e
duplex unit. The duplex CPU commun icat es with the copier main board using
a serial interface.
5
Duplex
BASIC OPERATION 1 May 1993
5. BASIC OPERATION
[A]
[B] [C]
[D][E][F]
5.1 FIRST S I DE CO PY
When the registration clutch turns on, the duplex gate [A] rotates up to direct
the copy to the duplex unit. The entra nce roller [B] and duplex feed roller [C]
then start to rotate. At the same time , th e duplex bottom plate [D] lowers.
[G]
5.2 DUPLEX STACKI NG
After the copy is delivere d to the dup lex tra y [ E] , th e jogger fences [F] move
inward to square the copy stack, th en move ba ck 10 mm. Af ter t he final copy
is delivered to the tray, the jogger fences remain against the paper stack.
5.3 SECOND S I DE CO PY
Soon after the final copy is squared by the jogger fences, the duplex bottom
plate raises up to the final position and the duplex feed rollers start rotating
counterclockwise (front view) to fee d the cop y to th e rela y rollers [G ]. Second
side copying is then done with the copy following the second feed sta tio n
paper path.
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1 May 1993 DRIVE MECHANISM
6. DRIVE MECHANISM
[B]
[A]
[C]
[D]
[E]
[F]
Drive is transmitted from the duplex feed motor [A] to the duplex fee d rollers
[B] and the entrance rollers [C] through a series of gears. A rela y gea r in the
copier exit section tran smits drive to th e duplex gate rollers [D] through the
duplex transport gear [E] . A rub be r belt on the en d of the dup lex gate roller
shaft drives the transpo rt rolle rs [F].
The duplex feed motor also drives the duplex bottom plate up and down .
Duplex
7
[E]
FIRST SIDE COPY 1 May 1993
7. FIRST SIDE COPY
7.1 FROM COPI E R PAP ER FEED SECTION TO DUPLEX
ENTRANCE ROLLER
[C]
[D]
[B]
[A]
When the copier 1st paper feed clut ch tu rns on , th e jog ge r motor turns on
and drives the three jogger fences into position 10 mm from the edges of the
copy paper. (This position is determin ed by casset te coding.) The registratio n
clutch then turns on and the duplex gate solenoid [A] energizes to raise the
duplex gate [B]. The duplex gate solenoid stays on until first side copying is
finished.
The copy is then directed to the duplex turn guid e, where it is fed by the
transport rollers [C] to the ent ran ce rollers [D]. The leading edge of the copy
activates the duplex entrance sensor [E], which is monitored by the dup lex
CPU to detect misfeeds.
8
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