Ricoh A076 Technical Bulletin FT3113

Technical Bulletin No. RTB-001

SUBJECT:Software Modification DATE: May 15, ’92

PAGE: 1 of 2

PREPARED BY: S. Orita
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Because of software changes, the ROM has been changed for the A076/A077/A078
copiers. Because of the part number change for the ROM, the part number for the main
board also has been changed. All changes are in effect from the first mass production.
The changes are listed below.

1. Main Board #A0775101 to #A0775111 (for A077/A078 copiers)

2. Main Board #A0765101 to #A0765111 (for A076 copier)

3. ROM #A0775104 to #A0775105 (for A076/A077/A078 copiers)
Details of software changes

1. How to reset "J1" indicator
The J1 indicator is used for paper misfeed and paper end. The indicator can now be reset

two ways: by opening and closing the front cover, or by opening and closing the paper
tray. (Previously, opening and closing the paper tray had no effect.)

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL: E7 series
(A076/A077/A078)

2. The VL correction factor is newly added to the exposure lamp voltage control. (Refer to
page 2 - 19 of the service manual.)

VL Correction Factor
The light intensity may decrease because of dust accumulated on the optics parts. The

exposure lamp data is increased by one (1) every 4,000 copies (factory setting) to
compensate for this . The VL correction is applied until the exposure lamp data (SP51)
rearches its maximum of 145. The following SP modes for the VL correction are newly
added:

Mode No. Function Data

81 VL Correction

Interval

95 VL Correction

Reset

Sets the interval of VL correction 0: every 4K copies

Do not change the data more than one
(1) step at a time.

Resets the exposure lamp data and
counter for the VL correction.

VL correction reset should always be
done before the light intensity
adjustment (SP48) is performed.

1: every 2K copies
2: every 1K copies
3: every 500 copies
4: No correction

0: No

1: Yes

Technical Bulletin No. RTB-001

SUBJECT: Software Modification DATE: May 15, ’92

PAGE: 2 of 2

3. To improve the ADS function, the number of threshold levels is increased. Replace
the first two tables on page 2-32 of the service manual with the tables below.

Base Bias Voltage (volts)

K

K≥TL1
TL1>K≥TL2
TL2>K≥TL3
TL3>K≥TL4
TL4>K≥TL5

TL5>K -360 -400

Normal or Darker

(SP34 = 0 or 1)

-160 -200

-200 -240

-240 -280

-280 -320

-320 -360

Lighter

(SP34 = 2)

Increase of

the exposure

lamp data

TL1 0.80 0.85 0.90 0.95 1.00 1.05 1.11 1.16 1.20 1.23
TL2 0.75 0.80 0.84 0.88 0.92 0.97 1.01 1.06 1.11 1.16
TL3 0.70 0.74 0.78 0.82 0.86 0.90 0.94 0.99 1.03 1.08
TL4 0.61 0.65 0.69 0.73 0.77 0.81 0.84 0.88 0.92 0.96
TL5 0.29 0.31 0.33 0.35 0.37 0.38 0.40 0.42 0.44 0.46

+0
+1

+2
+3

+4
+5

+6
+7

+8
+9

+10
+11

+12
+13

+14
+15

+16
+17

+18
+19

Technical Bulletin No. RTB-002

SUBJECT: False count on OPC Counter (SP69) DATE: May 15, ’92

PAGE: 1 of 1

PREPARED BY: S. Tomoe
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Symptom:

The OPC Counter (SP69) may display a false count.

a) This count does not affect any other function such as copy process control.
b) A correct count is displayed on the OPC counter once the drum is replaced.

Action Required:

Perform the drum initial setting by SP66 to clear the OPC counter when installing the

copier.
If the copier has been installed already, do not perform the drum initial setting. Use the
Total Copies (SP103) instead of the OPC Counter (SP69) to monitor the total number of
copies made with the drum.

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL: E7

Units Affected:

Model Code Units Affected

A076-25 S/N 2902030133 and below
A076-27 S/N A2942030020 and below
A076-29 S/N A2942010010 and below
A077-17 S/N A2952030020 and below
A077-22 S/N 2922010100 and below
A077-25 S/N 2922011000 and below
A077-26 S/N 3B80120300 and below
A077-27 S/N A2952030520 and below
A078-27 S/N A2972010011 and below

Technical Bulletin No. RTB-003

SUBJECT: Upper Unit Problem DATE: July 15, ’92

PAGE: 1 of 4

PREPARED BY: S. Orita
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Symptom: The upper unit cannot be held at an angle of 16 degrees with the DF when

the upper unit is opened. This is due to variation in the tolerance of the

torsion springs.

Solution: To hold the upper unit and DF at a proper position, the upper unit stand kit

(consists of 6 parts, see below) will be packed as an accessory to the E7 DF

(A365) from the July production. The cut-in serial numbers will be informed

by the MB.

Contents of the Kit

Upper Unit Stand (P/N A3651485).......................................................... 1pc

Magnet (P/N A3651486).......................................................................... 1pc

Instruction Decal (P/N A3652080)........................................................... 1pc

Stepped Screw (long) (P/N 54465832) ................................................... 1pc

Stepped Screw (short) (P/N AA143183).................................................. 1pc

Screw driver (P/N A3656001).................................................................. 1pc

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL:
E7 Series (A077/A078)
E7 DF (A365)

When the DF is installed to the copier in the field, this kit should also be installed to the
copier.

NOTE: For the DF units that we have already produced without the kits, we will send a

countermeasure kit. The contents of the countermeasure kit are exactly same as
described above.

How to Use the Upper Unit Stand

After the upper unit stand is installed to the copier, instruct the customer how to use the
upper unit stand as follows:, when there is a paper misfeed in the copier.

1. Open the front cover.

Technical Bulletin No. RTB-003

SUBJECT: Upper Unit Problem DATE: July 15, ’92

PAGE: 2 of 4

2. Press the release lever, lift the upper unit.

3. Make sure to use the upper unit stand to keep
the upper unit open as shown in the illustration.

4. After a paper misfeed removal, replace the upper unit stand in its original position.

New DF Installation Procedure

The new DF installation procedure is as follows:

CAUTION: When installing the DF, make sure

that the copier is unplugged.

1. Remove the platen cover [A] from the copier.

2. Remove the strips of tape from the DF.

[A]

Technical Bulletin No. RTB-003

SUBJECT: Upper Unit Problem DATE: July 15, ’92

PAGE: 3 of 4

3. Insert the DF [B] into the holes [C] of the
copier upper cover.

4. Secure the DF to the copier (2 thumb screws
[D]).

5. Remove the seal [E] from the outlet of the
copier.

6. Plug in the optics fiber cable [F] to the DF and
the copier as shown.

7. Plug in the power supply cord [G] of the DF to
the outlet of the copier rear cover as shown.

[D]

[B]

[C]

[E]

[F]

[G]

8. Install the original table [H] as shown.

[H]

Technical Bulletin No. RTB-003

SUBJECT: Upper Unit Problem DATE: July 15, ’92

PAGE: 4 of 4

9. Open the front cover.

10. Lift the upper unit.

11. Remove 2 screws [I].

12. Tighten the shorter stepped screw [J].

13. Install the upper unit stand [K]
(1 longer stepped screw [L]).

[L]

14. Stick the magnet [M] as shown.

[K]

[M]

[I]

[I]

[J]

[M]

15. Stick the decal [N] as shown.

16. Close the upper unit and the front cover.

17. Check the operation of the DF.

18. Instruct key operators how to use the upper
unit stand.

[N]

Technical Bulletin No. RTB-004

SUBJECT: Remarks for opening the upper unit DATE: July 15, ’92

PAGE: 1 of 1

PREPARED BY: S. Orita
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

When the development unit, cleaning unit, or drum unit is removed from the machine, the
upper unit becomes lighter. If the upper unit is released under this condition, it tends to
open very abruptly. The service engineer might be injured if he is leaving over the
machine at this time. Also, the machine might move due to the shock of the upper unit
opening abruptly.

To avoid possible injury or machine damage, the service engineers should be instructed to
hold the upper unit firmly as shown in the illustration when opening the unloaded upper
unit.

Revision of service manual
Information only
Other

FROM: Copier Technical Support Section

MODEL:
E7 series
(A076/A077/A078)

Technical Bulletin Correction Issued on: August 31, ’92

Model: E7 series (A076/A077/A078)
RTB NO: 5 Issued on: July 15, ’92 Total pages: 4

The exposure lamp data at ID level 6 is incorrect. (page 1)
The correct data is as follows:

Incorrect

Manual ID Level 123456 7
Base Bias Voltage (volts) –120 –160 –160 –160 –160 –200 –240 *Note
Exposure Lamp Data

Grid Voltage (volts)

Correct

Manual ID Level 123456 7
Base Bias Voltage (volts) –120 –160 –160 –160 –160 –200 –240 *Note
Exposure Lamp Data

Grid Voltage (volts)

Darker Lighter

Vo –4
Vg ±0

Darker Lighter

Vo –4
Vg ±0

Vo –4
Vg ±0

Vo –4
Vg ±0

Vo –2
Vg ±0

Vo –2
Vg ±0

Vo ±0
Vg ±0

Vo ±0
Vg ±0

Vo +2
Vg ±0

Vo +2
Vg ±0

Vo ±2

Vg +50

Vo +2

Vg +50

Vo +4

Vg +50

Vo +4

Vg +50

Reissued on: August 31, ’92

Technical Bulletin No. RTB-005

SUBJECT: Service Manual Correction DATE: July 15, ’92

PAGE: 1 of 4

PREPARED BY: S. Orita
CHECKED BY:

CLASSIFICATION:

Action Required
Troubleshooting
Retrofit Information

Please correct your service manual as follows:

1. Service Manual Page 2–31 (Base Bias Voltage at ID level 5)

The correct base bias voltage at ID level 5 is 160 volts. (200 volts is incorrect.)
Please replace the first table on page 2–31 of the service manual with table below

Manual ID Level 123456 7
Base Bias Voltage (volts) –120 –160 –160 –160 –160 –200 –240 *Note
Exposure Lamp Data

Grid Voltage (volts)

Darker Lighter

Vo –4
Vg ±0

Revision of service manual
Information only
Other

Vo –4
Vg ±0

FROM: Copier Technical Support Section

MODEL:
E7 Series
(A076/A077/A078)

Vo –2
Vg ±0

Vo ±0
Vg ±0

Vo +2
Vg ±0

Vo +2

Vg +50

Vo +4

Vg +50

Vo: Exposure Lamp Data for ID level 4 (SP48)
Vg: Standard Image Grid Voltage (–680 volts)

2. Service Manual Page 2–18 (Sensing measurement for ADS mode)
(The correction is bolded)

Incorrect Correct

1. Sampling starts 10 millimeters
from the leading edge of the
original and continues for 40
millimeters from the leading edge
of original in full size mode.

2. b=

Reproduction Ratio ( %)

40 mm

x 100 2. b=

1. Sampling starts 10 millimeters
from the leading edge of the
original and continues for 50
millimeters from the leading edge
of original in full size mode.

50 mm

Reproduction Ratio ( %)

x 100

Reissued on: August 31, ’92

Incorrect

Correct

Technical Bulletin No. RTB-005

SUBJECT: Service Manual Correction DATE: July 15, ’92

PAGE: 2 of 4

3. Service Manual – Point to Point (Directions of arrows are reversed)
(The correction is circled)