Ricoh VT3500 S Technical Bulletin
Technical Bulletin No. RTB-001
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 and 800cc ink). 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:
VT3500
Ges 5375/Rex 1280
NSA CP375
NEW
This modification will be implemented from the October ’91 production run for the 500cc
ink cartridge and November ’91 production run for 800cc ink cartridge.
Technical Bulletin No. RTB-000
SUBJECT: DATE:
PAGE: 2 of
Technical Bulletin No. RTB-002
SUBJECT: ROM Change
( B jam with A4/LT drum/Jam detection in Skip Feed mode )
PREPARED BY: S. Asai
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
[ Contents of ROM Modification ]:
The ROM on the main control board has been modified due to the following reasons:
Reason 1:
There has been reports in the field of the B jam with the A4/LT optional drum because the
paper feed solenoid does not turn on at correct timing. This problem only occurs in proof
mode (trial print) when the optional A4/LT drum is installed. Therefore, when the proof
print number is set to zero with SP mode 81, the problem ( B jam ) disappears. Please
note that this problem does not happen very often. One circumstance when this occurs is
when the drum rotation is delayed due to an overload.
Revision of service manual
Information only
Other
FROM: Copier Technical Support Section
MODEL:
VT3500
Ges 5375/Rex 1280
NSA CP375
DATE: Nov.15,’91
PAGE: 1 of 5
On the A3 drum, the paper feed solenoid turns on when the master making process is
completed. However, this ON timing is too early for the A4/LT drum. Therefore, on the
A4/LT drum. the paper feed solenoid turns on when the 2nd drum position sensor turns
on.( Normally, the 2nd drum position sensor turns on while the cutter returns to the home
position. Then, the process proceeds to the master wrapping process.) But, if the drum
rotation is delayed due to an overload, a paper jam is detected during the master
wrapping process because the 2nd drum position sensor ON timing is delayed. Normally,
the 2nd drum position sensor should be OFF at this time. (See the attached flow chart A.)
To prevent the above problem, the ROM program relating to the master wrapping process
has been modified. During master wrapping process, the paper misfeed is detected after
the 2nd drum position sensor turns off. (See the attached flow chart B.)
Technical Bulletin No. RTB-002
SUBJECT: ROM Change DATE: Nov.15,’91
PAGE: 2 of 5
Current ROM Program (Flow Chart A)
Master Making Process is completed
Cutter Return Process
Master
Cut
Process
Yes
A4 Drum
?
No
Paper Feed SOL ON
Cutter ON Process
Drum starts rotating
Cutter Return
Process
Master is fed
40 mm
Cutter Motor ON
Front Cutter
SW ON ?
No
No
2nd Drum
Position SN
ON ?
Yes
Paper Feed SOL ON
Yes
Cutter Motor OFF
Master
Wrapping
Process
Yes
Yes
OK
Yes
B Jam
Proof Print
No. "0" ?
No
Printing
Pressure
ON ?
No
2nd Drum
Position SN
ON ?
No
Paper Feed
SOL ON ?
No
No
2nd Drum
Position SN
ON ?
Yes
Paper Feed SOL ON
Return
Yes
Return
Technical Bulletin No. RTB-002
SUBJECT: ROM Change DATE: Nov.15,’91
PAGE: 3 of 5
Modified ROM Program ( Flow Chart B)
Master Wrapping Process
Yes
Yes
OK
Yes
B Jam
Proof Print
No. "0" ?
No
2nd Drum
Position SN
OFF ?
Yes
Printing
Pressure
ON ?
No
2nd Drum
Position SN
ON ?
No
No
Additional Flow (Program)
Technical Bulletin No. RTB-002
SUBJECT: ROM Change DATE: Nov.15,’91
PAGE: 4 of 5
Reason 2:
In order to enable a long sheet paper feeding (more than A3/DLT size) without misfeed
detection, an additional subroutine has been added to SP 82 (Skip Feed mode) as follows:
When SP 82 is selected, LCD is displayed as follows:
Skip Feed No.
1- 1 - 5 1
If 2 or more is set as a Skip Feed No. and then the Enter key is pressed, the following
LCD is displayed. The additional routine asks if the sheets used are longer than A3 or DLT
size.
Long Sheet ?
0: No 1: Yes 0
On the above display, if "0"(No) is selected, paper feed detection is normal mode.
However, if "1"(Yes) is selected, ignore the paper exit jam detection so that a long sheet
paper can be fed without misfeed detection.
Note: 1. The Maximum length of a long sheet paper is 600 mm.
2. The A4 optional drum cannot be used with this new mode (long sheet paper
feeding).
3. When the paper length is 450 or more, printing sheet may be stained by the
master trailing edge. Also, when the paper length is 477 or more, printing sheet
may be stained by the rubber pads used for turning the pressure roller.
4. Pull the paper delivery end plate down if the paper length is long. Hold the
printing sheets delivered from the machine. Otherwise, printing sheets drop from
the paper delivery table.
[P/N and S/N Information]:
The ROM part number for each language remains the same. However, a suffix (9th
character) has been changed as follows:
Old P/N New P/N
C2108626A C2108626B (Europe version in English) Total Sum Check "0100"
C2108452 C2108452A (Europe version in French) Total Sum Check "2800"
C2108457 C2108457A (Europe version in Italian) Total Sum Check "2A00"
C2108455 C2108455A (Europe version in Spanish) Total Sum Check "0700"
C2108450 C2108450A (Europe version in German) Total Sum Check "0D00"
C2108621A C2108621B (American version in English) Total Sum Check "0600"
C2108459 C2108459A (American version in French) Total Sum Check "2D00"
C2108461 C2108461A (American version in Spanish) Total Sum Check "0C00"
Technical Bulletin No. RTB-002
SUBJECT: ROM Change DATE: Nov.15,’91
PAGE: 5 of 5
The new ROM has been implemented since the October ’91 production. The cut-in serial
numbers are as follows:
Ges 5375 (NA version): S/N 50621100001Ges 5375 (Eu version): S/N 50611100001Rex 1280: S/N 50611100141NSA CP375: S/N 50611100161-
VT3500: S/N C2791100001Note: On the VT3500 (S/N C279110****) produced in October ’91, the new ROM has
not been implemented on machines with serial numbers (last 4 digits) listed below:
0031, 0048, 0050, 0096, 0105, 0106, and 0108.
Technical Bulletin No. RTB-003
SUBJECT: Paper Exit Pawl DATE: Feb. 15, ’92
PAGE: 1 of 1
PREPARED BY: S. Asai
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
[Phenomenon]:
During the printing run, the paper exit pawl slightly comes off and it contacts the drum
screen. This causes a black line on copies. In the worst case, the exit pawl contacts the
master clamper and the clamper may be damaged.
[Countermeasure]:
1. Check whether the exit pawl comes off or not.
2. Make sure that the exit pawl does not come off by pulling it out with light force ( with
fingers).
3. If it comes off, apply super glue one turn around the joint area and insert it as shown.
Note: Before applying super glue, place a sheet of paper on the vacuum unit to prevent
glue from dropping on the vacuum belt.
Revision of service manual
Information only
Other
FROM: Copier Technical Support Section
MODEL:
VT3500
Ges 5375/Rex 1280
NSA CP375
Super Glue
[Causes]:
Variation of amount of glue
The amount of glue has been controlled since December ’91 production. The cut-in serial
number for each model is as follows:
VT3500: S/N C2791120001-
Ges5375/Rex 1280/NSA CP305: USA version: S/N 50621120001-
Europe/Asia version: S/N 50611120001 Taiwan version: S/N 50631120001-
Technical Bulletin No. RTB-004
SUBJECT: Pressure On/Off Lever Breakage DATE: June 15, ’92
PAGE: 1 of 1
PREPARED BY: H. Kokubo
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
It was reported that the adjusting screw tab of the pressure on/off lever is sometimes
broken.
The pressure on/off lever (part number: C200 5566) is commonly used for all the series
models, but this problem is typical only on this model. This is because the pressure
roller’s pressure of this model is higher than that of the other models due to the A3 size
printing.
C2005566: Pressure On/Off Lever
Shaft
Revision of service manual
Information only
Other
FROM: Copier Technical Support Section
MODEL:
VT3500
Ges 5375/Rex 1280
NSA CP375
R0.5
R2
To increase the durability of the lever, the angle has been rounded as shown in the
illustration. This will reduce the stress on the adjusting screw tab. The new type lever has
been applied since the May ’92 production. The cut-in serial numbers are as follows:
C210-12 (Ges 115V version): 50622050001
C210-13 (Ges TWN version): From next production
C210-14 (Rex TWN version); From next production
C210-15 (Rex 115V version): From next production
C210-16 (NSA 115V version): From next production
C210-19 (Ricoh TWN version):From next production
C210-22 (Ges Eu. version): 50612050001
C210-24 (Rex Eu. version): 50612050217
C210-25 (NSA Eu. version): 50612050274
C210-27 (Ricoh Eu. version): C2792050001
C201-29 (Ricoh 220V version):C2792050201
The new lever has also been applied for all the other series models from May ’92
production due to part standardization.
Note: Although the part number (C200 5566) is still the same, the shaft on the lever is
marked with white paint. All spare parts which have been delivered from our SPC
since May ’92 are the new type only. Please note that the old type lever can still
be used for the other series models.
Technical Bulletin No. RTB-005
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:
VT3500
Ges 5375/Rex1280
NSA CP375
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-005
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 J uly 14, ’92
Color Brown 500cc July 16, ’92
NmmMl
Technical Bulletin
No.
RTB-006
SUBJECT: Damage of Optional A4 Drum
PREPARED BY: H.
CHECKED BY:
CLASSIFICATION:
■ Action Required
❑ Troubleshooting
❑ Retrofit Information
When the optional A4 drum is used, the pressure of the press roller is released from the
drum by the cam installed in the drum itself, unlike the A3 drum, which is originally
installed in the machine. The cam applies strong force to the A4 pressure on/off lever that
is connected with the press roller shaft in order to drive it and release the press roller
pressure,
It was reported that the bolt (M5x14 hexagonal hole head bolt) that secures the A4
pressure on/off lever on the press roller shaft breaks. This will cause the exit
the drum surface because the exit
Kokubo
❑ Revision of service manual
❑ Information only
❑ Other
pawl
drive cam is fixed with the A4 pressure on/off lever.
FROM: Copier Technical Support Section
MODEL:
Priport
Ges 5375/Rex 1280/
Nsa
DATE:
PAGE: 1 of 2
VT3500/
CP375
.
pawl
NOV.
to hit
30, ’92
Since August 1992, the torque to tighten the bolt has been reduced and controlled to 40
to 50
there was possibility of the bolt breaking while using the optional A4 drum. The cut-in
serial numbers are as follows:
C210-12 (Ges U.S.A.): 50622080001
C210-13 (Ges Taiwan): 50632080001
C210-22 (Ges Europe): 50612090001
C210-24 (Rex Europe): 50612080001
C210-25 (Nsa Europe): 50612080016
C210-27
C210-29
Note:
kgfcm
on the production line. In the past, it was around 100
(Ricoh
(Ricoh Asia, etc.): C2792080108
Even if the bolt is tightened manually with a hexagon key, if a engineer tightens as
much as he can, the torque will be about 70
Europe): C2792080001
kgfcm.
kgfcm.
It was found that
WImMl
Technical Bulletin
No.
RTB-006
SUBJECT: Damage of Optional A4 Drum
[Action Required]
When the optional A4 drum is installed for a machine produced before the cut-in serial
numbers listed in the preceding page, perform the following:
1. Replace the bolt [A] with a new one (P/N: 05950140E).
2. Be sure that the bolt [B] (M4x6 hexagonal hole head bolt) is firmly tightened. If this is
loose, the A4 pressure on/off lever does not operate properly.
DATE:
PAGE: 2 of 2
.
[A]
NOV.
30, ’92
ON/OFF Lever
II
Press Roller Shaft
WImMl
Technical Bulletin No. RTB-007
SUBJECT: A4 Pressure On/Off Lever Damage
PREPARED BY: H. Kokubo
CHECKED BY:
CLASSIFICATION:
❑
Action Required
■
Troubleshooting
❑
Retrofit Information
It was reported that the bolt (P/N: 05950140E) securing the A4 pressure on/off lever
sometimes breaks (see RTB
At worst, you may have to replace the A4 pressure on/off lever together with the press
roller shaft if the head of the bolt is broken and the lever cannot be removed from the
press roller shaft.
To cope with such situation, we have registered the press roller shaft kit (P/N: C210
9505)
as a service part. (See page 8 of 9.) This bulletin is to give the installation procedure
for the kit.
/W%e
no.
❑
Revision of service manual Priport
❑
Information only
❑
Other
6).
FROM: Copier Technical Support Section
MODEL:
Ges 5375/Rex 1280/
Nsa CP375
DATE:
PAGE: 1 of 9
.
VT3500/
NOV.
30, ’92
Follow the procedure below only when you cannot remove the broken bolt from the
press roller shaft and you have to replace the press roller shaft with new one.
1. Make sure that the paper feed table is in its lowest position and the drum is in its home
position, Then, turn off the main switch and disconnect the power cord.
2. Remove the front and rear covers.
3. Remove the drum unit.
4.
Remove the plotter unit. (Refer to page 5-18 in the service manual.)
5. Remove the A3 printing pressure cam. (Refer to page 5-69 in the service manual.)
(Continued)
Km(ml
Technical Bulletin
No.
RTB-007
SUBJECT: A4 Pressure On/Off Lever Damage
[D] —__
DATE:
PAGE: 2 of 9
.
A]
NOV.
30, ’92
/
[c]
6. While pressing the plunger of the pressure release solenoid [D], disengage the paper
detection arm [C] from the A3 pressure on/off lever [B]. Using a spanner, turn the drum
shaft manually until the printing pressure is applied.
7.
While the printing pressure is applied, remove the printing pressure spring by loosening
the two nuts [A].
(Continued)
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