Ricoh VT1730 S Technical Bulletin

Technical Bulletin No. RTB-001

SUBJECT: To disable ink detection circuit DATE: Aug. 31, ’93

PAGE: 1 of 1

PREPARED BY: J. Mochizuki
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

The ink detection circuit can be disabled if the main switch is turned on while both the
Auto Cycle key and the Reset key are pressed. If this mode is accessed, prints can be
made even though the ink detection pin is not in contact with the ink on the ink roller.
When the main switch is turned off, this condition is erased.

This function serves to remove the ink inside the drum.
The software of the main PCB ROM includes this function from the first mass production.

Revision of service manual
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FROM: Copier Technical Support Section

MODEL:
Priport VT1730
Ges 5303 / Rex 1220
NSA CP303

Technical Bulletin No. RTB-002

SUBJECT: Master Feed Jams DATE: Aug. 31, ’93

PAGE: 1 of 1

PREPARED BY: J. Mochizuki
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

It was found that the antistatic brush sometimes interferes with master transportation and
causes master feed jams. To ensure smooth master feed, the position of the antistatic
brush [A] sticking on the inner cover [C] has been changed.

The sticking position is as shown below. Even if the antistatic brush does not contact the
master surface, it functions to remove electrostatic charges on the master.

[B]

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[A]

FROM: Copier Technical Support Section

MODEL:
Priport VT1730
Ges 5303 / Rex 1220
NSA CP303

20.5 →19.0

The cut-in serial numbers are as follows:
VT1730 USA version: C3223060020

Europe/Asis version: C3223070061

Ges5303/Rex1220/
NSACP303 USA version: 50723070001

Europe/Asis version: 50713070001

The antistatic brush assembly has been registered as a service part (C2174064). Please
refer to MB No. 11.

Technical Bulletin No. RTB-003

SUBJECT: Paper feed pressure DATE: Aug. 31, ’93

PAGE: 1 of 1

PREPARED BY: J. Mochizuki
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

When 500 sheets of standard paper (80g/m2) is set on the paper table, paper misfeeds
would occur. This is because not enough feed roller pressure is applied due to friction
between the paper stack (leading edge side) and the lower paper feed guide which guides
the leading edge of the paper stack.

In this case, advise your customer to change the position of the pressure adjustment
levers, as shown below, to increase paper feed pressure.

Revision of service manual
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Other

FROM: Copier Technical Support Section

MODEL:
Priport VT1730
Ges 5303 / Rex 1220
NSA CP303

We confirmed that even if the pressure adjustment levers are in the lower position, normal
paper (70g/m to 200g/m) would be fed properly. So from August ’93 production, the
pressure adjustment levers have been set in the lower position (stronger pressure) in the
factory.

However, when paper multifeeds occur and the levers are lowered (it seems to occur very
rarely) it is possible that the problem mentioned above may still occur. Therefore, as a
permanent solution, we are looking for a more suitable tension for the feed pressure
springs.

Technical Bulletin No. RTB-004

Rib

Gap

Guide
Plate

SUBJECT: Master Eject Jams DATE: June 15, ’94

PAGE: 1 of 3

PREPARED BY: H. Kokubo
CHECKED BY: S. Hamano

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Symptom

1. Frequent master eject jams at location “F”.

2. The master wraps around the upper and/or lower master eject rollers.

3. “F” jam cannot be reset because the actuator (feeler) of the master eject sensor
remains pushed down by the pressure plate. (The actuator comes under the pressure
plate.)

Cause

Revision of service manual
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FROM: 2nd Technical Support Section

MODEL:
Priport VT1730/
Ges 5303 / Rex 1220/
Nsa CP303

Rib

There are 4 ribs to guide the ejected
master in the master eject unit. There
is a small gap at the leading edge of
the ribs against the guide plate.

Due to a part variation, if the gap is too
big, the master tends to be caught by
the ribs. A jam or other problems may
occur as per the following sequence:

----- Continued -------------------------------

OK

NG

Technical Bulletin No. RTB-004

Gap

SUBJECT: Master Eject Jams DATE: June 15, ’94

PAGE: 2 of 3

1. While the master is being removed from the
drum, the leading edge of the master goes
properly into the master eject unit. At this point,
however, while the pressure plate moves to
compress the master in the eject box, the middle
part of the master tends to rub against the ribs.
If there are any gaps, the master is caught by
the ribs. (The master therefore remains caught
by the ribs.)

2. If no jam is detected by the machine after the
above situation has occurred, the machine can
carry out the next master eject. However, the
next ejected master interferes with the master
caught by the ribs and is stopped just behind the
eject rollers.

Master

Stopped Master

Eject Roller

As result, “F” jam will be indicated. Otherwise, if
there is no space for the master to proceed (due
to the previous master jam), the master is again
caught by and wraps around the eject rollers. If
the master is stopped just on the master eject
sensor, the sensor feeler remains pushed down
while the pressure plate is traveling. After the
pressure plate returns to its home position, the
sensor feeler comes under the plate. (“F” jam is
then indicated and cannot be reset.)

Technical Bulletin No. RTB-004

Slot in the
Guide Plate

SUBJECT: Master Eject Jams DATE: June 15, ’94

PAGE: 3 of 3

Solution 1 (For the mass production units)

The ribs fixed (welded) to the guide
plate have been changed as shown to
prevent any gap at the leading edge.
The part number of the guide plate
(Guide Plate - Eject Unit) has been
changed from #C2173565 to
#C2173567.

The new guide plate will be applied into
the production from June 1994.

New Rib

Solution 2 (For the field units)

As a solution for the field units, a mylar strip (Guide Mylar - 15 x 33 mm: P/N C2179500)
has been registered as a service part. Install the mylar strips on the leading edge of the 4
ribs to cover the gap as shown.

NOTE: 4 mylars are required for one unit.

Guide Mylar - 15 x 33 mm

Upper Eject Roller

Guide Mylar - 15 x 33 mm

Technical Bulletin No. RTB-005

SUBJECT: Ink Pump Improvement DATE: Nov. 15, ’95

PAGE: 1 of 2

PREPARED BY: H. Kokubo
CHECKED BY: M. Iwasa

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

N810: Ricoh VT1730/Gestetner 5303/RexRotary 1220/nashuatec CP303/ABDICK 6120
N810-II: Ricoh VT1800/Gestetner 5304/RexRotary 1222/nashuatec CP304/ABDICK 6130

Information for the N810-II starts from this bulletin. RTB’s number 1 to 4 are for the
N810 only.

To ensure that all ink in the cartridge is supplied,
a spring has been added inside the ink
pump as shown to the right. The spring
ensures that the small ball, which is used as a
valve, is pushed back properly.

Revision of service manual
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FROM: 2nd Technical Support Section

MODEL:
Priport N810/N810-II

This modification has been applied from the
September 1995 production runs of all
Priport series models. The part numbers of
the ink pump assemblies remain the same.
(Note that the N850 and RN925 have been
using the new type from the first mass
production.)

There are three types of ink pump. They
are the NA/NB type that can hold the
1000 cc ink cartridge, the N type that can
hold the 600 cc ink cartridge only, and the
N810 type for the N810 and N810-II
only. See the following table for the
applicable models.

TYPE OF

INK PUMP

NA/NB NA-2, NA-3, NB-2

N N865, N860, N915, N935, N955, and all SS series models.

N810 N810, N810-II

APPLICABLE MODELS

Packing

Valve

Newly Added
Spring

Socket

Cross-section of the Bottom Part

of the Ink Pump