Ricoh VT2100 S Service Manual vt2105

RICOH PRIPORT VT 2105

SERVICE MANUAL

SECTION 1

OVERALL MACHINE

INFORMATION

Overall

Information

1 October 1992 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
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:

± 3 mm at "0" position

5

Print paper size: Minimum: 90 mm x 148 mm (3.6" x 5.8")

Maximum: 325 mm x 447 mm (12.8" x 17.6")

Print paper weight: 50 g/m

2

to 215 g/m

2

Printing speed: 60, 75, 90, 105, 120 sheets/minute (5 steps)
First print time:
Paper feed table

± 3 seconds (B4 size)

42
1000 sheets (66.3 g/m

2

/17.6 lb)

capacity:

2

Paper delivery table

500 sheets (66.3 g/m

/ 17.6 lb)
capacity:
Power source: 120 V, 60 Hz 3.0 A

220/240 V, 50/60 Hz 1.8 A

1-1

SPECIFICATIONS 1 October 1992

Maximum
Power consumption:

120 V version: 300 W
220/240 V version: 300 W

Weight: 120 V version: 99 kg (217.8 lb)

220/240 V version: 104 kg (228.8 lb)

Dimensions:
(W x D x H)

Stored: 735 mm x 607 mm x 577 mm
(29.0" x 23.9" x 22.8")
Set up: 1279 mm x 607 mm x 656 mm
(50.4" x 23.9" x 25.9")

2

ADF original capacity: 20 sheets (66 g/m
Original guide width

98 mm to 316 mm (38.6" to 12.44")

) or 1.8 mm height

settings:
Original scanning time: 5 ms/1 line

Original thickness: 0.05 mm to 0.8 mm
Original feed speed: 16.9 mm/second (When master processing)

33.9 mm/second (When not master processing)
Pixel density: 300 dots/inch
Master eject box

capacity:

30 masters (Normal condition)

25 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 250 g

Thick paper position 550 g

Normal position 180 g

Weak position 70 g

± 10 mm (manual)

± 20 mm (mechanical)

Ink supply: Automatic ink supply system
Press roller pressure:

± 0.3 kg

10
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

Master counter: 6 digits

1-2

Overall

Information

1 October 1992 SPECIFICATIONS

Supplies:

Priport Thermal master 280 mm width
Master VT- II - M:
(300 dots/inch)

Master roll 250 masters/1 roll
Roll diameter 130 mm
Master length 480 mm/1 master
Max run length 2000 prints

Ink colors: Black, Red, Blue, Green, Brown
(500 cc/pack)

1-3

DIFFERENCE BETWEEN VT2000 SERIES AND VT2105 1 October 1992

2. DIFFERENCE BETWEEN VT2000 SERIES
AND VT2105

No. Iter Remarks

The pixel density of the VT2105 is 300 dots/inch.
Corresponding to this, the CCD used on the
VT2105 is the same as the one used on the
SS800 series.

1. CCD

2. Thermal Head

Number of effective
Pixels:

Reading Length: 309 mm
Photo Signal Storage: 5 ms

3648pixels

Due to pixel density change, the thermal head
has been changed.

Density of thermal
heating elements

Number of thermal
heating elements

Memory length 256 mm
Applied voltage 19~24 V

300 dots/inch

3072 dots

3.

Drum Ink Roller

Layout

To ensure paper separation from the drum, the
ink roller has been shifted forward the paper
feed table.
The distance L has been changed from 5.0 mm
to 3.5 mm.

VT2100 series VT2105

[A]

[B]

L

[A]

[B]

L’

L = 5.0 mm L’ = 3.5 mm

NOTE:The optional color drum for the VT2105

is commonly used for the VT2100 series.
(The distance L of the color drum is

4.5 mm)

1-4

Overall

Information

1 October 1992 DIFFERENCE BETWEEN VT2000 SERIES AND VT2105

To ensure drum connection, a drum lock lever is
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.

4. Drum Connector

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

5.

Ink Detection

Board

been removed.
To supply ink to the ink roller evenly, the second

6. Drum Shaft

ink supply hole (count from the front side) of the
drum shaft is covered with a strip of tape.
To ensure paper separation from the drum, the

7.

Exit Pawl Air

Pump

exit pawl air pump system is standardized. (The
pump system can optionally be installed on the
VT2000 series.)
The thermal head drive board has been
removed. The function of the board has been
moved to the image processing board and the

8.

Thermal Head

Drive

main board.
The thermal head voltage is directly applied from
the power supply unit. The main board applies
signal to the PSU to supply thermal head voltage
only during the master making process.

1-5

ELECTRICAL COMPONENT DESCRIPTIONS 1 October 1992

3. ELECTRICAL COMPONENT
DESCRIPTIONS

INDEX

No.

Motors

4 Original Transport Motor Transports the original to the scanner section.
10 Master Feed Motor Feeds the master to the drum.
11 Cutter Motor Cuts the master.
14 Master Eject Motor Sends used master into the master eject box.
18 ADF Drive Motor Feeds the original to the scanner section.

25 Image Shift Motor
28 Paper Table Drive Motor Raises and lowers the paper table.
30 Main Motor

60 Air Knife Motor

61 Vacuum Motor

Solenoids

3 Original Pressure Solenoid

15 Master Eject Solenoid

Master Eject Clamper

21

Solenoid

22 Drum Lock Solenoid

Master Feed Clamper

23

Solenoid

24 Reverse Roller Solenoid Releases the clutch to rotate the reverse roller.
27 Paper Feed Solenoid
32 Printing Pressure Solenoid Moves the press roller against the drum.
47 Ink Supply Solenoid

Switches

6 Right Cutter Switch Detects when the cutter position is at the far right.
12 Left Cutter Switch Detects when the cutter position is at the far left.

16 Master Box Switch

Master Eject Unit Safety

36

Switch

NAME FUNCTION

Changes the timing between the paper feed roller
and the drum to adjust the vertical image position.

Drives paper feed, drum, printing and paper delivery
unit components.

Rotates the fan to separate the paper leading edge
from the drum.

Provides suction so paper is held firmly on the
transport belt.

Presses the original pressure plate down on the
originals.

Moves the master eject roller to contact the drum
surface.

Opens the master clamp to eject the master.
Prevents removal of the drum unit unless the drum

is at the original stop position
Opens the master clamp to clamp the master.

Releases the paper feed sector gear to rotate the
paper feed roller.

Releases the spring clutch to activate the ink supply
pump.

Checks whether the master eject box is installed
correctly or not.

Checks whether the Master Eject Unit is closed
correctly or not.

1-6

Overall

Information

1 October 1992 ELECTRICAL COMPONENT DESCRIPTIONS

INDEX

No.

41 Master Cut Switch

42 Scanner Safety Switch
44 Drum Rotation Switch Informs the CPU to rotate the main motor at 10 rpm.
45 Front Door Safety Switch
46 Drum Safety Switch Checks whether the drum unit is set correctly or not.
52 Paper Table Safety Switch
57 Interlock Switch Releases the cover safety functions.

59 Main Switch Turns the power on or off.
62 Full Master Detecting Switch

Pressure Plate Position

63

Switch
64 Printing Density Switch
65 ADF Safety Switch Check whether the ADF unit is set correctly or not.

Sensors

1 Original Registration Sensor
2 2nd Original Sensor Detects when the original is set.

Master End Sensor

9
13 Master Buckle Sensor Detects master buckles.
17 Master Eject Sensor
19 1st Original Sensor Detects when the original is set in the ADF mode.

29 Drum Rotation Sensor Supplies timing pulses to the main board.
33 2nd Drum Position Sensor Checks the position of the drum.
34 1st Paper Exit Sensor Detects misfeed.
35 2nd Paper Exit Sensor Detects misfeed.
37 1st Drum Position Sensor Checks the position of the drum.

49 Paper Table Height Sensor

51 Paper End Sensor

Paper Table Lower Limit

53

Sensor

54 Printing Pressure Sensor

NAME FUNCTION

Informs the CPU to cut the master paper leading
edge.

Checks whether the scanner unit is closed correctly
or not.

Checks whether the Front Door is set correctly or
not.

Checks whether the paper table is opened correctly
or not.

Informs the CPU when the master eject box is full of
masters.

Informs the CPU when the pressure plate has
reached the home position.

Use to select the printing density according to the
type and quality of the original.

Informs the CPU when the original leading edge
reaches the exposure glass.

Informs the CPU when the plotter unit runs out of
master roll.

Detects when the used master is sent into the
master eject box.

Detects when the paper table reaches the paper
feed position.

Informs the CPU when the paper table runs out of
paper.

Detects when the paper table reaches the lowest
position.

Informs the CPU when the printing pressure is
applied.

1-7

ELECTRICAL COMPONENT DESCRIPTIONS 1 October 1992

INDEX

No.

NAME FUNCTION

Printed Circuit Board

7 Power Supply PCB Rectifies 100V AC input and supplies DC voltage.
31 AC Drive PCB Controls the AC component by relays.
38 Ink Detection PCB Control the ink supply.
39 CCD PCB Converts the light intensity into the electrical signal.
40 A/D Conversion PCB Converts the analogue signal into the digital signal.

43 Operation Panel

48 Main Control PCB

Controls the LED performance and monitors the key
operation.

Controls all machine functions both directly and
through other boards.

50 Image Processing PCB Controls the master processing performance.

Counters

55 Copy Counter Keeps track of the total number of copies made.
56 Master Counter Keeps track of the total number of masters made.

Others

5 Fluorescent Lamp Stabilizer

Stabilizes the power supplement to the fluorescent

lamp.
8 Thermal Head Burns the image on to the master.
20 Fluorescent Lamp Exposes the original.
26 Encoder Converts 16 image positions to 4 bit data.
58 Circuit Breaker Cuts the ac line.

1-8

SECTION 2

DETAILED SECTION

DESCRIPTION

Detailed

Descriptions

1 October 1992 OPTICS

1. OPTICS

1.1 OVERALL

The CCD [A] used on the VT2105 is commonly used on the SS800 series.
Due to the pixel density difference between the VT2105 and SS800 series
(300 dots/inch and 12 dots/mm), the reduction ratio (lens [B] position) of the
VT2105 is different from the SS800 series.

[E]

[F]

[C]

[B]

A/D Converter

[D]

Thermal Head

Image

Processing

[C]: Shading Plate
[D]: Mirror
[E] Exposure Glass

Operation Panel

Main Board

[F]: Fluorescent Lamp

The thermal head drive board has been removed. The function of this board
has been moved to the image processing board and the main board.

[A]

2-1

OPTICS 1 October 1992

1.2 CIRCUIT

Original
Registration
Sensor

2nd Original
Sensor

Original
Transport Motor

M

Image

A/D
Conversion P.C.B.

1
3

2

1
3

2

5V
CN603-1

CN603-4

CN603-2
GND

CN603-3

CN605

-1

-2

-3

-4

-5

-6

CN601-13

CN601-11

CN601-25
CN601-27

CN601-21
CN601-23

CN601-25
CN601-19

Processing

P.C.B.

CN403-13

CN403-11

CN403-25
CN403-27

CN403-21
CN403-23
CN403-25
CN403-19

Fluorescent Lamp

1st Original

Sensor

ADF
Drive Motor

Original Pressure
Solenoid

ADF Safety SW

M

SOL

Stabilizer

CN611-1

CN611-2

CN612-1

CN612-2

1

3

2

CN604

Red

-1
CN604

-3

Yellow

Black

CN604-2

CN607-3+5V

CN607-5 CN601-3

CN607-4 (GND)

CN607-6
CN607-7

CN607-1
CN607-2

CN607-8
CN607-9

24V

+24V

CN601

-15

GND

+5V

CN601-5

+24V

CN601-1

CN601-7
CN601-9

CN403-15

CN403-3

CN403-5

CN403-1

CN403-7 (IN)
CN403-9 (OUT)

2-2

Detailed

Descriptions

1 October 1992 OPTICS

Component Name I/O

Fluorescent Lamp O 604-3

ADF Drive Motor O 607-6
Original Pressure

Solenoid
Original

Registration Sensor
2nd Original Sensor I 603-3

1st Original Sensor I 607-5

ID Conversion Board

CN No

O 607-2

I 603-4

24V

24V

24V

24V

24V

24V

Description

When the fluorescent lamp turns ON, the

0V

CN604-3 goes to 0V.
When the ADF drive motor starts rotating

0V

CN607-6 goes to 0V.
When the original pressure solenoid is

0V

energized, CN607-2 goes to 0V.
When the original registration sensor is

0V

activated, CN603-4 goes to 0V.
When the 2nd original sensor is

0V

activated, CN603-3 goes to 0V.
When the 1st original sensor is activated,

0V

CN607-5 goes to 0V.

2-3