Ricoh VT2100 S Service Manual vt2200
VT 2200
SERVICE MANUAL
INTRODUCTION
This manual explains only the features of the N850 (C224 model) that are
different compared with the VT2000 series (C211, C212 and C213 models).
So, please refer to the VT2000 series service manual for the sections which
are not described in this manual.
The N850 (C224 model) has been designed based on the N865 (C216
model), and some descriptions are the same as the N865 service manual.
SECTION 1
OVERALL MACHINE
INFORMATION
4 July 1995 SPECIFICATIONS
1. SPECIFICATIONS
Configuration: Desktop
Master processing: Digital
Printing process: Full automatic one-drum stencil system
Original type: Sheet
Original size: Maximum 307 mm x 432 mm (12.0" x 17.0")
Minimum 90 mm x 140 mm (3.6" x 5.5")
Reproduction ratios: LT Version A4 Version
Full Size 100% 100%
Reduction 93% 93%
75% 82%
64% 71%
Image mode: Line/Photo
Overall
Information
Color printing: Drum unit replacement system
Master feed/eject: Roll master automatic feed/eject
Printing area: Maximum: 250 mm x 355 mm (9.8" x 13.9") at
20°C/ 65 % RH.
Leading edge margin:
Print paper size: Minimum: 90 mm x 148 mm (3.6" x 5.8")
Print paper weight: 47.1 g/m2 to 209.3 g/m2 (12.5 lb to 55.6 lb)
Printing speed: 60, 75, 90, 105, 120 sheets/minute (5 steps)
First copy time: Less than 35 seconds (B4)
Second copy time: Less than 38 seconds (B4)
Paper feed table
capacity:
5 ± 3 mm at the "0" position
Maximum: 325 mm x 447 mm (12.7" x 17.5")
Less than 32 seconds (A4)
Less than 35 seconds (A4)
1000 sheets (66.3 g/m2 /17.6 lb)
Paper delivery table
capacity:
Power source: 110/120 V, 60 Hz 4.5 A
500 sheets (66.3 g/m2 / 17.6 lb)
220/240 V, 50/60 Hz 2.7 A
1-1
SPECIFICATIONS 4 July 1995
Maximum
power consumption:
110/120 V version: 280 W
220/240 V version: 280 W
Weight: 97kg (213.6 lb)
Dimensions:
(W x D x H)
Trays closed: 735 mm x 607 mm x 577 mm
(28.9" x 23.9" x 22.7")
Trays open: 1279 mm x 607 mm x 656 mm
(50.4" x 23.9" x 25.9")
ADF original capacity: 20 sheets (66 g/m2) or 1.8 mm height
Original guide width
98 mm to 316 mm (38.6" to 12.44")
settings:
Original scanning time: 2.5 ms/line
Original thickness: 0.05 mm to 0.8 mm
Original feed speed: 21.2 mm/second (When master processing)
33.9 mm/second (When not master processing)
Pixel density: 300 dots/inch
Master eject box
capacity:
70 masters (Normal condition)
60 masters (10°C/30% RH Condition)
Paper feeding: Friction roller/center separation system
Feed table side plate
88 mm to 330 mm (3.46" to 12.99")
width settings:
Paper feed roller
pressure:
Separation roller
pressure:
Side registration:
Vertical registration:
Normal position 300 g
Thick paper position 400 g
Normal position 180 g
Weak position 70 g
± 10 mm (manual)
± 20 mm (mechanical)
Ink supply: Automatic ink supply system
Press roller pressure:
10 ± 0.3 kg
Paper delivery: Air knife/vacuum delivery
Delivery side plate width
90 mm to 320 mm (3.54" to 12.6")
settings:
Print counter: 7 digits
1-2
4 July 1995 SPECIFICATIONS
Master counter: 6 digits
Supplies:
Priport
Master VT- II - M:
(300 dots/inch)
Ink colors:
(600 ml/pack)
Thermal master 280 mm width
Overall
Information
Master roll 257 masters/roll
Roll diameter 130 mm
Master length 480 mm/master
Max run length 2000 prints
Black, Red, Blue, Green, Brown
Yellow, Purple, Navy, Maroon
1-3
ESSENTIAL DIFFERENCES BETWEEN C211/C212/C213 AND C224 MODELS
2. ESSENTIAL DIFFERENCES BETWEEN
C211/C212/C213 AND C224 MODELS
No. Item Remarks
A CCD which corresponds to 300 dpi pixel density is used.
4 July 1995
1. CCD
2. Thermal Head
3.
Drum Ink Roller
Layout
Number of Effective
Pixels:
Reading Length: 309 mm
Photo Signal Storage: 2.5 ms
The thermal head and thermal head drive circuit have
been changed corresponding to the 300 dpi pixel density
and the increased master feed speed.
Density of thermal
heating elements
Number of thermal
heating elements
Memory length 256 mm
To ensure paper separation from the drum, the ink roller
has been shifted towards the paper feed table.
The distance L has been changed from 5.0 mm to 3.5 mm
(same as the C216 model).
C211 model
[A]
[B]
L
L = 5.0 mm L’ = 3.5 mm
3648 pixels
300 dots/inch
3072 dots
C224 model
[A]
[B]
L’
NOTE: The optional color drum for the C224 model
is commonly used for the C211 model.
(The distance L for the color drum is
4.5 mm.)
1-4
4 July 1995
No. Item Remarks
4. Drum Connector
5. Ink Detection Board
6. Drum Shaft
7. Exit Pawl Air Pump
Main Board and
8.
9. Thermal Head Drive
12.
13. Air Knife Motor
14.
Image Processing
Board
Paper Table Drive
Motor
Pressure Plate
Position Sensors
ESSENTIAL DIFFERENCES BETWEEN C211/C212/C213
AND C224 MODELS
To ensure drum connection, a drum lock lever has been
added inside the front door. To remove the drum from the
machine, the drum release lever must be pulled up to
disconnect the drum connector. (Same as the C216
model.)
The location of the ink detection board has been changed
from the upper side to the right side of the drum shaft. The
ink type switch (SW901), which was not used (always set
at oil type), has been removed. (Same as the C216 model.)
To supply ink to the ink roller evenly, the second ink supply
hole (count from the front side) of the drum shaft is
covered with a strip of tape.
(Same as the C216 model.)
To ensure paper separation from the drum, the exit pawl
air pump system is standardized. (Same as the C216
model.) (The pump system can optionally be installed in
models of the C211 series.)
The main board and the image processing board have
been combined into one board.
The thermal head drive board has been removed. The
function of the board has been moved to the main board.
The thermal head voltage is directly applied from the
power supply unit. The main board applies the signal to the
PSU to supply thermal head voltage only during the master
making process. (Same as the C216 model.)
The paper table drive motor has been changed from an ac
motor to a dc motor.
The air knife motor has been changed from an ac motor to
a dc motor.
The pressure plate position switch and the full master
detecting switch have been eliminated.
Three photo-interrupters, upper and lower pressure plate
sensors and full master box sensor are used instead.
Overall
Information
1-5
ESSENTIAL DIFFERENCES BETWEEN C211/C212/C213
AND C224 MODELS
No. Item Remarks
The master eject motor which had two functions: (one is to
15.
16 Skip Feed
17.
18.
Pressure Plate
Motor
Economy Function
(New Function)
Security Mode
(New Function)
drive the exit rollers, the other is to drive the pressure
plate) has been replaced by two motors; the master eject
motor and pressure plate motor. Due to this modification,
the master box capacity has been increased.
A user can select from 2 to 9 rotations of the drum while
one sheet of paper is fed.
If "Economy mode" is selected on the operation panel, a
lower thermal head energy is applied when a master is
made. As a result, the image will be lighter than normal
and ink consumption will be less.
"Secret mode" can be selected by changing DIP SW103-6.
If this mode is selected, the Print key is disabled after
turning the main switch off and on. (Only the "Master
making key" is available.)
4 July 1995
1-6
4 July 1995 ELECTRICAL COMPONENT DESCRIPTIONS
3. ELECTRICAL COMPONENT
DESCRIPTIONS
INDEX
No.
Motors
Main Motor Drives paper feed, drum, printing and paper delivery
1
Vacuum Motor Provides suction so that paper is held firmly on the
4
7 ADF Drive Motor Feeds the original to the original transport section.
12 Original Transport Motor Transports the original to the scanner section.
20 Master Feed Motor Feeds the master to the drum.
22 Pressure Plate Motor Raises and lowers the pressure plate.
Air Knife Motor Rotates the fan to provide air to separate the paper
26
28 Master Eject Motor Sends used masters into the master eject box.
33 Cutter Motor Cuts the master.
Image Shift Motor Changes the timing between the paper feed roller
60
64 Paper Table Drive Motor Raises and lowers the paper table.
Solenoids
Original Pressure Solenoid Presses the original pressure plate down on the
11
Ink Supply Solenoid Releases the spring clutch to activate the ink supply
21
29 Master Eject Solenoid Opens the master clamp to eject the master.
Paper Feed Solenoid Releases the paper feed sector gear to rotate the
51
52 Printing Pressure Solenoid Moves the press roller against the drum.
Master Eject Clamper
56
Solenoid
Drum Lock Solenoid Prevents removal of the drum unit when the drum is
58
Master Feed Clamper
59
Solenoid
NAME FUNCTION
unit components.
transport belt.
leading edge from the drum.
and the drum to adjust the vertical image position.
originals.
pump.
paper feed roller.
Opens the master clamp to eject the master.
not at the home position.
Opens the master clamp to eject the master.
Overall
Information
Switches
Printing Density Switch Use to select the printing density corresponding to
6
14 ADF Safety Switch Check whether the ADF unit is set correctly or not.
Fluorescent Lamp Safety
18
Switch
19 Left Cutter Switch Detects when the cutter position is at the far left.
Master Eject Box Switch Checks whether the master eject box is installed
27
32 Right Cutter Switch Detects when the cutter position is at the far right.
the type and quality of the original.
Cuts the power for the fluorescent lamp when the
scanner is opened.
correctly or not.
1-7
ELECTRICAL COMPONENT DESCRIPTIONS 4 July 1995
INDEX
No.
37 Front Door Safety Switch Checks whether the front door is set correctly or not.
38 Drum Safety Switch Checks whether the drum unit is set correctly or not.
41 Paper Table Safety Switch Checks whether the paper table is opened or not.
47 Test Switch Releases the cover safety functions. (NOTE:)
48 Main Switch Turns the power on or off.
Master Eject Unit Safety
49
Switch (220V machines only)
Master Eject Unit Safety
55
Switch (115V machines only)
Master Cutter Switch Informs the CPU to cut the master paper leading
62
65 Drum Rotation Switch Informs the CPU to rotate the main motor at 10 rpm.
Sensors
3 1st Paper Exit Sensor Detects misfeeds.
5 2nd Paper Exit Sensor Detects misfeeds.
Original Registration Sensor Detects misfeeds in the ADF, and synchronizes
9
10 2nd Original Sensor Detects when the original comes to the feed position.
13 1st Original Sensor Detects when the original is set in the ADF mode.
Lower Pressure Plate Sensor Informs the CPU if the pressure plate is at the lower
23
Full Master Box Sensor Informs the CPU if the master eject box is full of
24
Upper Pressure Plate Sensor Informs the CPU if the pressure plate is at the upper
25
30 Master Eject Sensor Detects master eject jams.
34 Master Buckle Sensor Detects master buckling.
Master End Sensor Informs the CPU when the plotter unit runs out of
35
Paper Table Height Sensor Detects when the paper table reaches the paper
40
Paper Table Lower Limit
42
Sensor
43 Printing Pressure Sensor Informs the CPU when printing pressure is applied.
Paper End Sensor Informs the CPU when the paper table runs out of
44
50 Drum Rotation Sensor Supplies timing pulses to the main board.
53 2nd Drum Position Sensor Checks the position of the drum.
57 1st Drum Position Sensor Checks the position of the drum.
NAME FUNCTION
Checks whether the master eject unit is closed
correctly or not. Cuts the ac power.
edge.
master feed with original feed.
limit position.
used masters.
limit position.
master roll.
feed position.
Detects when the paper table reaches the lowest
position.
paper.
Printer Circuit Board
16 CCD PCB Converts light into an electrical signal.
17 A/D Conversion PCB Converts analog signals into digital signals.
Main Control PCB Controls all machine functions both directly and
39
54 Ink Detection PCB Checks if the ink is present in the drum.
through other boards.
1-8
4 July 1995 ELECTRICAL COMPONENT DESCRIPTIONS
INDEX
No.
63 Power Supply PCB Rectifies 100 V ac input and supplies dc voltage.
Counters
45 Copy Counter Keeps track of the total number of copies made.
46 Master Counter Keeps track of the total number of masters made.
Others
2 Transformer Steps down the wall voltage.
8 Fluorescent Lamp Exposes the original.
15 Fluorescent Lamp Stabilizer Controls the exposure lamp.
Reverse Roller Clutch Transfers master feed motor rotation to the reverse
31
36 Thermal Head Burns the image onto the master.
61 Encoder Converts 16 image positions to 4 bit data.
66 Operation Panel Interfaces the CPU and the operator.
NAME FUNCTION
roller at proper timing.
NOTE: The Master Eject Unit Safety Switch in the 220 V machines cannot
be disabled by this test switch.
Overall
Information
1-9
SECTION 2
DETAILED DESCRIPTIONS
4 July 1995 MASTER EJECT SECTION
1. MASTER EJECT SECTION
1.1 MASTER EJECT ROLLER DRIVE MECHANISM
[A]
[C]
[D]
[B]
Detailed
Descriptions
C224D500.img
A dc motor [A] installed in the rear of the machine drives the master eject
rollers [B] through a timing belt [C] and gears [D] to eject used masters. The
master is transported between the upper and lower master eject rollers to be
ejected to the master eject box.
2-1
MASTER EJECT SECTION 4 July 1995
1.2 PRESSURE PLATE UP/DOWN MECHANISM
[H]
[G]
[F]
[A]
[D]
[I]
[C]
[B]
[E]
C224D501.img
After the used master is transported to the master eject box, the master is
compressed by the pressure plate.
The pressure plate is driven by an independent dc motor. The pressure plate
motor [A] drive is transmitted to the gear [B] through gears, and the pin [C]
moves link [D] down until the lower pressure plate sensor [E] is actuated.
Spring [F] pulls down on the pressure plate [G] and the ejected master in the
master eject box is compressed. Then the pressure plate motor stays off until
the master making process is finished. Then the pressure plate motor starts
again to return the pressure plate to the upper position. The motor stops
when the upper pressure plate sensor [H] is actuated.
The machine detects that the master box is full if the full master box sensor [I]
is not actuated when the pressure plate goes down.
2-2
4 July 1995 OPTICS
2. OPTICS
2.1 OVERALL
The CCD [A] which corresponds to a 300 dpi pixel density is used for the
C224 model.
Light reflected from the original goes to the CCD through a lens.
The CCD changes the light into an analog electrical signal which is changed
to 4-bit digital data in the A/D conversion PCB. The main control PCB
changes the 4-bit data into 1-bit data to drive the thermal head.
[E]
Detailed
Descriptions
[F]
[D]
[C]: Shading Plate
[D]: Mirror
[E]: Exposure Glass
[F]: Fluorescent Lamp
[C]
[B]
[A]
A/D Conversion
PCB
Thermal Head
Main
Control
PCB
Operation Panel
C224D502.wmf
2-3
OPTICS 4 July 1995
2.2 THERMAL HEAD
(1) Specifications
The C224 model uses a 300 dpi thermal head.
Thermal head
• Width 256 mm
• Number of thermal head elements 3072 dots
• Density of thermal head elements 300 dpi
(2) Thermal Head Control
The PSU applies thermal head voltage which is adjusted in the factory to
match individual thermal head characteristics. The main control PCB
controls the thermal head to reproduce the image on the master.
ENLTRIG
ENL
Pulse width
C224D503.wmf
The thermal head energy is controlled by changing the pulse width.
The pulse is controlled by the ENL signal from the main board corresponding
to ENLTRIG from the image processing board.
C224D504.wmf
Thermal head voltage is applied from the PSU only during the master making
process. This is controlled by the VHDON signal (CN105-14) from the main
board.
2-4
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