Ricoh A030 Technical Bulletin

Technical Bulletin No. RTB-029

SUBJECT: Abnormal exposure lamp cable movement DATE: Nov. 30, ’90

PAGE: 1 of 2

PREPARED BY: I. Kakegawa

FROM: Copier Technical Support Section

CHECKED BY:
CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Revision of service manual
Information only
Other

MODEL: NC11

Ref. M/B No. NC11 No. 9

When the following symptom occurs, install the cable guide plate (P/N A0301697) which is
newly designed to support the exposure lamp cable.

[Symptom]
The following abnormal image is obserbed only

Blurred
image

20 to
30 mm

Black mode
A3/11" x 17"

Background

in A3/11" x 17" copy;

1) Black mode

• On the corner of right-trailing edge, there is

partical dirty background.

• Or, the copy image at 20 to 30 mm from

the trailing edge is blurred.

20 to

30 mm

Full color mode
A3/11" x 17"

Misaligned
image

2) Full color mode

• The holizontal black line in 20 to 30 mm

from the trailing edge of original is copied
in two or three color lines due to
misalignment.

• In rare cases, black lines/charactors are

copied in "Blue" (Cyan + Magenta) due to

no yellow.
[Cause]
The exposure lamp cable is bent down, and

becomes in abnormal shape as shown while
scanning at full return area. In black copy with
226 mm/sec scanning, one of cables will be
bent inside the optical light path, resulting in less
drum exposure. In full color mode with 113
mm/sec scanning, the scanner will not be
smooth at full return area, resulting in
misaligned image.

Technical Bulletin No. RTB-029

SUBJECT: Abnormal exposure lamp cable movement DATE: Nov. 30, ’90

PAGE: 2 of 2

[Action]

[B]

Install the cable guide plate (P/N A0301697) using the following procedure;

1. Remove the exposure glass. (See page 5-24 of the manual.)

2. Remove the operation panel. (See page 5-119 of the manual.)

3. Remove the shielding plate [A].

4. Move the scanner to the full return position.

5. Remove two harness holders [B] from the front optics frame.

6. Using two holes for the harness holder, install the cable guide plate [C].
(Use two M4 x 6 screws with a washer.)

[A]

[C]

[C]

[D]

NOTE: 1) The surface with a piece of tape should be faced up.

2) While pressing the plate down, fix screws.

3) Position the flat cable of the exposure lamp [D] over this taped surface of
the cable guide plate.

7. While moving the scanner back to its home position manually, make sure that this plate
does not contact to the scanner.

8. Reassemble the parts removed.
NOTE: Two harness holders removed are not used.

This plate has been installed at the factory for the machines with the following
serial number onwards:

Ricoh NC100 A030-17 S/N 2520100001

-19 S/N 2520090144

-27 S/N 2520090459

-29 S/N 2520090478

Nashua C240 -16 S/N 186010XXXX

-25 S/N 1850090081

Infotec 7125 -26 S/N 3910900051

Technical Bulletin No. RTB-031

SUBJECT: Dark full color image at 8 to 10K scans after EM or PM DATE: Nov. 30, ’90

PAGE: 1 of 1

PREPARED BY: 1. Kakegawa
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

This RTB is to inform you of a mistake made by the service engineer, which has ever
experienced in field. In order to have proper VL sensor operation after the maintenance,
read the following carefully.

< SYMPTOM >

Copy image in all modes becomes very dark at 8 to 10K scans after the last maintenance
for the following ;

1). OPC drum replacement, and/or

2). Charge corona/grid wire cleaning or replacement, and/or

3). Optics cleaning, and/or

4). Exposure lamp replacement

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL: NC11

< CAUSE >

At the last visit, image adjustment for 3C and 6C was done, but not for black and the other
modes. In this case, black copy image became too light because of VL compensation
made before the above maintenance. As a result, VL sensor initial setting data was more
than 71, and no beeper sounded. If this was not found by the engineer, VL sensor has not
been operational.

< ACTION >

Refer to RTB No. 30.

< KEY SERVICE POINTS >

1. Whenever image adjustment is done, never forget to check copy image in not only
3C/6C but also black and other modes, and adjust lamp data.

2. Pay attention to beeper, or data. ( Refer to SP mode table sheet. )

Technical Bulletin No. RTB-032

SUBJECT: Light copy in single color mode, single color erase mode, or
light black copy in area color mode ( 3C+Black, or
6C+Black )

PREPARED BY: 1. Kakegawa
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

This RTB is to inform you one of the mistakes made by the service engineer after the
maintenance, which has ever experienced in field.

< SYMPTOM >
Full color copy ( 3C/6C ) and black copy are normal. But, the following copy is too light ;

---- single color

---- single color erase

---- black copy in area color mode ( 3C+Black, or 6C+Black )

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL: NC11

DATE: Nov. 30, ’90
PAGE: 1 of 1

< CAUSE >
After the following cleaning or replacement, image adjustment for 3C, 6C, and black was

done, but not for single color and the other modes;

1). OPC drum replacement, and/or

2). Charge corona/grid wire cleaning, or replacement, and/or

3). Optics cleaning, and/or

4). Exposure lamp replacement

If so, lamp data for those modes became too high after the above cleaning or
replacement. ( Refer to RTB No.30 for VL compensation. )

< ACTION >

Perform image adjustment for those modes.

< KEY SERVICE POINTS >

1. Never forget to check copy image made in those modes as well as 3C, 6C, and black
modes. If it is too light, adjust lamp data.

2. For this purpose, we recommend you to use " EM PROCEDURE LIST " in the manual.