Ricoh VT2100 S Technical Bulletin

Technical Bulletin No. RTB-001

SUBJECT: Ink Cartridge "O" Ring and Rubber Pad DATE: April.30.’91

PAGE: 1 of 2

PREPARED BY: S. Asai
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

[Phenomenon 1]:
There has been a problem with the "O" ring inside the ink cartridge nozzle. The "O" ring

comes off and remains on the nozzle of the ink pump when the ink cartridge is replaced,
or it comes off and stays in the cartridge cap when the cap is removed. This occurs when
the temperature changes radically making the "O" ring contract.

[Countermeasure 1]:

Instruct customers on how to replace the ink cartridge. Have them follow this procedure:

1. Make sure that the "O" ring does not stay on the nozzle of the ink pump before a new
ink cartridge is installed.
If it remains on the nozzle, remove it; otherwise the new ink cartridge cannot be set
properly.

Revision of service manual
Information only
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FROM: Copier Technical Support Section

MODEL:
VT2100/2130/2150
VT2300/2500
Ges 5310/5315/5320/5330
Rex 1240/1241/1242/1260
NSH CP310/CP315/CP330

2. Make sure that the "O" ring does not stay in the cartridge cap when the cap is removed
from the ink cartridge nozzle.
If the "O" ring stays in the cartridge cap, remove the "O" ring from the cartridge cap and
install it inside the cartridge nozzle.

Ink Cartridge
Nozzle

Melting Point

"O" ring

Note: To prevent the "O" ring from coming off, more than 2 points between the "O" ring

and the ink cartridge nozzle were soldered as shown above.
This melting process has been implemented since the March ’91 production run.
For a mark of the melting process, a black circle has been stamped on the end of
the lot number. ( Example: Lot No. 1911932 o )

Technical Bulletin No. RTB-001

SUBJECT: Ink Cartridge "O" Ring and Rubber Pad DATE: April.30.’91

PAGE: 2 of 2

[Phenomenon 2]:

There has been a problem with the rubber pad located on the ink pump nozzle. It comes
off when the ink cartridge is removed. When no rubber pad remains on the ink pump
nozzle, ink inside the cartridge may not be pumped to the drum even if a new ink
cartridge is installed. This problem does not happen very often.

[Countermeasure 2]:
Apply a strong adhesive ( super glue ) as follows:

1. Remove the rubber pad with a small screwdriver.

2. Clean the rubber pad and the ink pump nozzle (contacting place of the rubber pad)
with cloth. If stains remain, clean them off with the thermal head cleaner.

3. Apply a little super glue to the 4 points on the rubber pad as shown.

Note: Do not apply too much glue. This is because the rubber pad cannot be inserted

correctly if there is too much glue.

4. Insert the rubber pad into the pump nozzle.

Pump Nozzle

Note: The problem has been fixed for machines with serial numbers listed below. Other

machines not described here will have this problem fixed from the April mass
production run onward.

VT2150: S/N C2801030001­VT2300: S/N C2811030001­VT2500: S/N C2821030001-

5310: S/N 50211030181- (Europe/Asia version)
5315: S/N 50321030218- (USA version)
5320: S/N 50431030001- (Taiwan version), 50411030001- (Europe/Asia version)
5330: S/N 50521030004- (USA version), 50531030001- (Taiwan version)

50511030244- (Europe/Asia version)

Rubber Pad

Glue

1240: S/N 50211030091- (Europe/Asia version)
1241: S/N 50321030273- (USA version)
1260: S/N 50521030001- (USA version), 50511030527- (Europe/Asia version)
CP310: S/N 52011030061- (Europe/Asia version)
CP330: S/N 50511030727- (Europe/Asia version)

Technical Bulletin No. RTB-002

SUBJECT: One dot black line in 64% or 82% reduction mode DATE: June 15 ’91

PAGE: 1 of 2

PREPARED BY: S. Asai

FROM: Copier Technical Support Section

CHECKED BY:
CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Revision of service manual
Information only
Other

MODEL:
VT2100/2130/2150
Ges 5310/5315/5320
Rex 1240/1241/1242
NSH CP310/CP315

[Phenomenon]:

For C211 models, a one dot black line appears on the rear side of the copies when 64%
(on the VT2130, LG version) or 82% (on the VT2100, B4 version) is selected. This
problem does not happen very often.

* In 82% reduction mode, the line appears 127mm from the center.
* In 64% reduction mode, the line appears 100mm from the center.

Note: With the A4 size machine (VT2150), this problem does not occur. This is because

the line would be located out of the maximum printing area when 82% reduction
mode is selected. Also, this problem does not occur on the C212 and C213
models (VT2300 and VT2500). Because the A/D conversion board used on these
machines has a circuit that always changes the dummy pixel data to white data.

Center

B4 width (257 mm)

127 mm

(82%)

LT width (216 mm)

Paper
Feed
Direction

100 mm

(64%)

[Cause]:

The dummy pixel (D31) of the CCD is mixed with the effective pixels because of the timing
delay of the processing circuit. This dummy data is a gray level and is output from the A/D
conversion board as a black data or white data. This depends on the optics adjustment
and/or the Image Density switch position.

Technical Bulletin No. RTB-002

SUBJECT: One dot black line in 64% or 82% reduction mode DATE:May 31 ’91

PAGE: 2 of 2

[Temporary Countermeasure]:

In order to discard the dummy pixel (D31) in reduction mode, the reduction ratio of 64%
and 82% was slightly changed. This will allow the D31 dummy pixel data to be discarded
in reduction mode.

Before modification After modification

Discarded

pixel

Reduction

64%

(LT version)

82%

(A4 version)

Reduction ratio Discarded pixel Reduction ratio

64.3% 9/14 62.5% 5/8

81.8% 9/11 81.3% 13/16

Because of this modification, the PROM on the image processing board has been
modified. The part number of the PROM remains the same. However, a suffix (9th digit)
has been added to the part number as follows:

1. PROM (IC-HN27128AP-20): P/N C2118004A

Note: The above modification has been implemented since 1st mass-production run

except for the following machines:
Ges 5315: S/N 50321030001 to 50321030217 = Total 217 units

Rex 1241: S/N 50321030275 to 50321030277 = Total 3 units
Ges 5320: S/N 50411030001 to 50411030045 = Total 45 units

In the near future, the A/D conversion board will be made the same as that of the
C212 and C213 models (VT2300 and VT2500). This is to delete the one dot black
line and still use the original reduction ratios (64.3% and 81.8%).

Technical Bulletin No. RTB-003

SUBJECT: Paper jamming around the drum DATE:June 15 ’91

PAGE: 1 of 1

PREPARED BY: S.Asai
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

[Phenomenon]:

Paper jamming occurs around the drum because of static electricity when the machine is
used under low humidity conditions. Heavy static charges will build up around the master
during the printing run. This happens particularly when thin paper is being used at high
speed rotations. This also happens if the original (and therefore the master on the drum) is
changed.

[Countermeasure]:

Stick the antistatic brush (P/N: C2079010) [A] on the upper second feed roller guide plate
[B] as illustrated below: (The antistatic brush has been registered as a spare part.)

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL:
VT2100/2130/2150
VT2300/2500
Ges 5310/5315/5320/5330
Rex 1240/1241/1242/1260
NSH CP310/CP315/CP330

9.5 mm

[A]

[B]

41 mm

[A]

Drum

[B]

Paper Feed Direction

Note: Depending on the type of paper and/or the environment, paper might still jam even

though the antistatic brush was installed on the guide plate.
The occurrence ratio varies according to the environment. If possible, improve the
environmental conditions or move the machine to a better place.

Technical Bulletin No. RTB-004

SUBJECT: Paper exit pawl air pump DATE: July 31 ’91

PAGE: 1 of 5

PREPARED BY: S.Asai
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

To ease paper separation from the drum, we have registered the air pump kit (P/N
C2119001) as a spare part so that the paper exit pawl air pump mechanism such as that
of the VT3500 (Ges 5375, Rex 1280, NSA CP375) can be installed on the other models
listed above.

Note: When the blank area at the leading edge of copy is too narrow and/or the original

has a large solid image, paper might still jam around the drum even though the
air pump kit was installed on the machine.

Paper exit pawl air pump mechanism:

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL:
VT2100/2130/2150
VT2300/2500
Ges 5310/5315/5320/5330
Rex 1240/1241/1242/1260
NSA CP310/CP315/CP330

The paper exit pawl air pump produces a jet of air when the paper exit pawl comes near
the drum surface. This jet of air helps push down on the paper and separate it from the
drum.

Air pump kit installation procedure:

Part check list and installation procedure follow this page.

Technical Bulletin No. RTB-004

SUBJECT: Paper exit pawl air pump DATE: July 31 ’91

PAGE: 2 of 5

1. PART CHECK

Make sure that you have all the parts listed below.
* The air pump kit (P/N C2119001) consists of the following parts.

No Part Number Description Qty Shape

1 C2119002 Air Pump Assembly 1

2 C2119003 Exit Pawl Assembly 1

3 C2136201 Shelter Plate 1

4 C2094711 Hose Band 1

5 55066073 Stopper Screw 1

6 C2119004 Installation Procedure 1

AIR PUMP KIT INSTALLATION PROCEDURE

(Page 6 to 9 in English)

Technical Bulletin No. RTB-004

SUBJECT: Paper exit pawl air pump DATE: July 31 ’91

PAGE: 3 of 5

2. INSTALLATION PROCEDURE

[A]

[D]

[B]

[C]

[E]

[F] : P/N C2119003

Note: Before installing the air pump unit, remove the drum, the rear cover, and the

shelter plate.

1. Open the master eject unit and remove the exit pawl assembly [A] (1 E-ring [B] and 1
spring [C]) from the machine .

2. Remove the bushing [D] and the exit pawl lever [E] (1 Allen screw) from the shaft.

3. Mount the above exit pawl lever on the new exit pawl shaft [F] (1 Allen screw used on
the previous shaft) and insert the bushing onto the shaft.

Technical Bulletin No. RTB-004

SUBJECT: Paper exit pawl air pump DATE: July 31 ’91

PAGE: 4 of 5

[B]

[C]

[D]

[E]

[A]

Drum

0.5±0.2 mm

4. Install the new exit pawl unit [A](assembled on the previous page) to the machine (1
E-ring and 1 spring).

Note: Make sure that the collar [B] on the exit pawl lever is correctly placed on the exit

pawl drive cam [C].

5. Insert the edge of the vinyl hose [D] into the hole on the rear side plate as shown.

- EXIT PAWL CLEARANCE ADJUSTMENT -

6. Manually turn on the paper feed and printing pressure solenoids. Using a spanner (10
mm), gradually rotate the drum rotation shaft counterclockwise to move the exit pawl to
the drum.

7. When the printing pressure is applied, adjust the clearance between the drum and the
exit pawl by turning the screw [E]so that it is 0.5±0.2 mm.

Note: Make sure that the exit pawl does not contact the drum surface and the master

clamper several times when the printing pressure is applied.

Technical Bulletin No. RTB-004

SUBJECT: Paper exit pawl air pump DATE: July 31 ’91

PAGE: 5 of 5

[E]

[A]

[B] : 55066073

Note: Make sure that the drum stops at its home position. Then, perform the following

procedure.

8. Remove the center support plate [A] originally installed on the machine (5 screws).

9. Install the stopper screw [B] on the rear side plate as shown.

10. Install the new center support plate [C] together with the air pump unit (5 screws).

Note: When installing the air pump unit, make sure that the mark [D] on the air pump

drive gear [E] is located at the top position and that the drum stops at its home
position. Otherwise, the air does not blow from the exit pawl edge at the correct
timing.

[C] : C2119002

[D]

[E]

[F] : C2094711

11. Lay the vinyl hose as shown and install the hose end to the air pump exit with the
hose band [F].

12. Install the new shelter plate (P/N C2136201) on the vacuum unit.

13. Re-install the rear cover (6 screws).

Technical Bulletin No. RTB-005

SUBJECT: Black Ink Cartridge Seal DATE: Sep. 30,’91

PAGE: 1 of 1

PREPARED BY: S.Asai
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

To increase ink production, the transparent seal will be removed from the exit of the black
ink cartridge (500cc). For the color inks, the transparent seal remains because the color
inks are more fluid than the black ink.
Due to this change, the instructions printed on the black ink cartridge will be changed as
shown below.

OLD

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL:
VT2100/2130/2150
VT2300/2500
Ges 5310/5315/5320/5330
Rex 1240/1241/1242/1260
Nsa CP310/CP315/CP330

NEW

This modification will be implemented from the October ’91 production run for the 500cc
ink cartridge.

Technical Bulletin No. RTB-006

SUBJECT: F Jam Indication at Power ON DATE: Nov.15,’91

PAGE: 1 of 1

PREPARED BY: S. Asai
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

[Phenomenon]:

F jam indication (Master eject jam indication) lights when the main switch turns on. This is
because the master eject sensor always stays on.

[Adjustment Procedure]:

To ensure that the master eject sensor functions, perform the following adjustment
procedure.

Master Eject Sensor

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL:
VT2300/2500
Ges 5330/ Rex 1260
NSA CP330

[A]

1. Clean the sensor surface with cloth dampened with alcohol.

2. Make a master with the blank original.

a. Set the blank original and make about 20 prints.
b. Stop printing and remove the master from the drum.

3. Insert the above master [A] between the upper and the lower eject rollers with the

master film side up as shown.

4. Confirm that the voltage between TP104 and GND line (CN103-5) on the main PCB is

3.5V±0.5V

5. If it is not, adjust it by turning VR104 on the main PCB.

Note: Adjust the voltage under the condition that the master is stretched.

6. Make sure that the voltage is 1.7V or less when no master is under the master eject

sensor.

Note: If the sensor surface stains, the voltage may go over 1.7V

Technical Bulletin No. RTB-007

SUBJECT: ROM Change for Combine 2 Originals Mode DATE: Nov.15,’91

PAGE: 1 of 3

PREPARED BY: S. Asai

FROM: Copier Technical Support Section

CHECKED BY:
CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Revision of service manual
Information only
Other

MODEL:
VT2100/2130/2150
Ges 5310/5315/5320
Rex 1240/1241/1242
NSA CP310/CP315

[Phenomenon]:

There have been reports in the field that the Combine 2 Originals mode is canceled when
used with the 71% reduction mode and A4 sideways originals (210 mm width). This
problem occurs on the VT2150 (A4 size machine).

[Causes]:

On the VT2150 (A4 size machine), there is no room for variation in original length
detection in Combine 2 Originals mode. Therefore, if the original feed speed is slightly
slower than the standard speed and/or the original registration sensor actuator for
detecting the original feed length does not move smoothly, this problem may occur in
Combine 2 Originals mode.

Current Original Detection Program in Combine 2 Originals mode on the VT2150:

* Select 71% reduction and use A4 originals.

10 mm

Original

Blank
margin

1st A4 original (210 mm) 2nd A4 original (210 mm)

200 mm

200 x 0.71

10 mm

Blank

margin

200 mm

Master

Master making length 142 mm

1st master making length

142 mm

Maximum master making length=287 mm

Black margin on 2nd
original

10 mm

Remaining length [A]

7 mm

7 mm traing edge image
is not made on the
master in 71% reduction.
On the original, 10 mm
disappears.

1. When the 1st original is fed out, the remaining master making length [A] for the 2nd
original is 145 mm. (287 mm -- 142 mm = 145 mm)

2. In Combine 2 Originals mode, the ROM program detects whether the remaining length
[A] (145 mm) is more than half of the maximum master making length (287 mm / 2
=143.5 mm). If the remaining length is less than 143.5 mm, the Combine 2 Originals
mode is automatically canceled before the 2nd original is fed in.

145 -- 143.5 = 1.5 mm (Normally, it has 1.5 mm leeway)

Technical Bulletin No. RTB-007

SUBJECT: ROM Change for Combine 2 Originals Mode DATE: Nov.15,’91

PAGE: 2 of 3

[Countermeasure]:

The ROM program relating to the original length detection in Combine 2 Originals mode
has been modified as follows. This modification is applied to the B4/LG size machines
(VT2100/2130) to standardize the function of Combine 2 Originals mode.

New Program in Combine 2 Originals mode:

1. Apply reduction ratio for 10 mm leading edge image on the 2nd original.

* For example, select 71% reduction and use A4 originals.

10 mm

Original

Blank
margin

Master

1st A4 original (210 mm) 2nd A4 original (210 mm)

200 mm

Blank

margin

142 mm

142 mm

142 mm

Maximum master making length=287 mm

7.1 mm

149.1 mm

200 mm

4.1 mm

4.1 mm trailing edge
image is not made in the
master

2. Added a leeway of 5% of the length in original length detection in Combine 2 Originals
mode.

a. Maximum original size is determined with the following calculation.

Max. Original Size =

Max. Master Making Length

2

x 1.05

÷Reduction Ratio + 10 mm (Blank margin on 1st original)
Max. Master Making Length: B4/LG size machine = 354 mm

A4 size machine = 287 mm

b. The following table shows the maximum original length (Sub-scan line) on each

reduction ratio. If the original length is more than the length mentioned in the table, the
Combine 2 Originals mode is canceled.

Technical Bulletin No. RTB-007

SUBJECT: ROM Change for Combine 2 Originals Mode DATE: Nov.15,’91

PAGE: 3 of 3

Printe Size (Model)

B4 Size Machine

Reduction Ratio
(Discarded pixel)

100% 195.9 mm 195.9 mm 160.7 mm

93%

(13/14= 92.85%)

82%

(9/11=81.81%)

71%

(5/7=71.42%)

75%

(3/4=75%)

64%

(9/14=64.28%)

Note: The above figures are true when the image reproduction is exact.

(VT2100)

210.1 mm 210.1 mm 172.3 mm

237.2 mm ---- 194.2 mm

270.2 mm ---- 220.9 mm

---- 257.8 mm ----

---- 299.1 mm ----

LG Size Machine

(VT2130)

A4 Size Machine

(VT2150)

The ROM on the main control board has been modified. The part numbers of the ROM
and the main control board remain. However, a suffix (9th character) has been changed
as follows:

Old P/N New P/N

C2118045C C2118045D (ROM: IC-HN27C256G-20)------------Total Sum Check "BC00"
C2118112E C2118112F (Main Control Board - LG Machine)

C2118113F C2118113G (Main Control Board - B4 Machine)
C2118114F C2118114G (Main Control Board - A4 Machine)

The problem on the VT2150 (A4 size machine) has been fixed for machines with serial
numbers listed below. Other machines not described here will have this problem fixed from
the November mass production run onward.

CP310: S/N 50211100001­5310: S/N 50211100011­1240: S/N 50211100121-

VT2150: S/N C2801100*** (9th, 10th, and 11th digits are as follows:)

074, 143-148, 155, 163-165, 169, 170, 175, 177, 178,
182-186, 189, 191-194

Note: If necessary, check the P/N suffix (9th character) of the ROM inside the machine

to judge whether the new ROM has been installed.

Technical Bulletin No. RTB-008

SUBJECT: Priport Ink Lot Number DATE: Aug. 15, ’92

PAGE: 1 of 2

PREPARED BY: J. Mochizuki
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

To clarify the ink production dating, the method of lot numbering has been changed as
follows:

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL:
VT2100/2130/2150
Ges 5310/5315/5320
Rex 1240/1241/1242
NSA CP310/CP315

Old method

.

1912762

Year

Date

Month

Internal use only

Internal use only

New method

20617–121

Year Month

The above lot number means that the ink is produced on June 17, ’92

Date

Internal use only

Technical Bulletin No. RTB-008

SUBJECT: Priport Ink Lot Number DATE: Aug. 15, ’92

PAGE: 2 of 2

The table below shows the new lot numbering start date.

Type of ink New lot numbering

start date

Black 800cc July 13, ’92

Black 500cc July 13, ’92

Color Red 500cc July 13, ’92

Color Blue 500cc July 16, ’92

Color Green 500cc July 14, ’92

Color Brown 500cc July 16, ’92