Ricoh A058 Technical Bulletin FT7870
Technical Bulletin No. RTB-001
SUBJECT: Operation Panel Display Malfunction DATE: Jan 15. ’91
PAGE: 1 of 1
PREPARED BY: T.Okajima
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
1. Phenomenon
*No display on the operation panel. (Blank LCD LEDs)
*When resetting the machine by turning off/on the main SW:
SC15 comes up.
All LEDs of function keys light.
2. Cause
Copper tape stuck on the aluminum sheet below the operation panel control board
peels off partially and touches the operation panel control board.
This condition causes Vcc (5V) to vary. As a result, CPU malfunctions.
3. Action
Secure the copper tape [A] with 3 strips of teflon tape [B] as shown.
The ends of each piece of teflon tape should wrap around the edge of the aluminum
sheet [C].
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FROM: Copier Technical Support Sec.
MODEL: F22
[B]
[C]
[A]
4. Countermeasure
The teflon tape strips have been stuck on the copper tape starting with the following
serial number.
Model (V/Hz) Serial No
Savin 9710 (115/60)
Infotec 9172 DZ (220, 240/50)
Ricoh FT7870 (115/60)
Ricoh FT7870 (220, 240/50)
3201200741~
1200001~
2690110221~
2690110311~
Technical Bulletin No. RTB-002
SUBJECT: Two-sided copies wrap around the pressure roller DATE: Jan 15. ’91
PAGE: 1 of 1
PREPARED BY: T. Okajima
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
1. Phenomenon
When making the reverse side of a two-sided copy, a paper jam occurs in the fusing
unit. The problem tends to occur in the following situations:
*Solid image on the trailng edge of the 1st side
*Just after installation
*Just after replacing the oil supply pad
2. Cause
Just after installation or replacing the oil supply pad, jams occur because the oil is not
supplied to the pressure roller sufficiently.
3. Action
When installing the machine or replacing the oil supply pad, add oil to the oil supply pad
[A] directly.
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FROM: Copier Technical Support Sec.
MODEL: F22
[A]
REVISED ON FEB.28
Technical Bulletin No. RTB-003
SUBJECT: Scanner malfunctions ← correction
PREPARED BY: T. Okajima
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
1. Phenomenon
*The scanner suddenly starts moving
*The machine suddenly initializes the lens position.
*The lens stops at an improper position and the copy image becomes dim and
unfocused.
2. Cause
When replacing the upper front cover (below the operation panel), a rib [A] inside this
cover pushes against the core of the DC harness [B]. As a result, CN101 (34 pins) [C]
is disconnected or loosened, and some signals are not sent.
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FROM: Copier Technical Support Sec.
MODEL: F22
DATE: Jan 15. ’91
PAGE: 1 of 1
[C]
[A]
[B]
3. Action
Connect CN101 (34pins) on the operation panel PCB.
4. Counter Measure
The rib near CN101 has been removed starting with the following serial numbers:
Model (V/Hz) Serial No
Savin 9710 (115/60)
Infotec 9172 DZ (220, 240/50)
Ricoh FT7870 (115/60)
Ricoh FT7870 (220, 240/50)
3201200741~
1200001~
2690120001~
2690120366~
Technical Bulletin No. RTB-004
SUBJECT: Blank Copy DATE: Jan 15. ’91
PAGE: 1 of 1
PREPARED BY: T. Okajima
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
1. Symptom
Just after installing the machine or during the first few days after installation, the
following problem occurs.
Occurs
• Some blank copies are made during repeating copy mode.
• The exposure lamp stops lighting during free run mode.
2. Cause
During transportation of this machine, the 2nd scanner carriage may have been
dislodged from its vertical position on the rod, because of vibration. So, the 2nd carriage
cannot move smoothly.
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FROM: Copier Technical Support Sec.
MODEL: F22
[A]
[B]
3. Action
1. Loosen the two screws [A],
2. Move the scanner unit [B] into place and back 4 or 5 times by hand.
3. Fix the two screws which were loosened in step 1.
REVISED ON FEB. 28.
Technical Bulletin No. RTB-005
SUBJECT: Sorter Stapler Misfeed DATE: Jan. 31, ’91
PAGE: 1 of 3
PREPARED BY: T. Okajima
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
1. PHENOMENON
This problem occurs only on the sorter stapler with the F22.
The final copy stops at the exit sensor of the sorter stapler in normal copy mode (without
sort/stack mode). When this happens, the jam indicator fails to blink.
The occurence ratio is low because this problem occurs only under the following conditions:
1) Paper with insufficient stiffness is used.
2) The sorter stapler exit sensor bounces.
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FROM: Copier Technical Support Sec.
MODEL:
Sorter stapler with F22
Exit sensor
F22
Sorter Stapler
Technical Bulletin No. RTB-005
SUBJECT: Sorter Stapler Misfeed DATE: Jan. 31, ’91
PAGE: 2 of 3
2. CAUSE
The exit sensor feeler tends to bounce when the paper is passing the feeler, and the
sensor briefly turns off.
The CPU of the sorter stapler mistakenly recognizes that the paper has exited into the tray.
Consequently, sorter stapler motor stops before the paper exits completely. (The motor
stops 0.3s after the exit sensor turns off.)
Normal
With
Bounce
Exit Sensor
Motor
Exit Sensor
Motor
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Bounce
0.3s
0.3s
Copy paper stops.
3. ACTION (Program change)
The time interval [A] has been increased from 0.3s to 0.7s. Laboratory tests have show
that even if the exit sensor feeler bounces, this prevents the motor from stopping before
the copy paper exits.
Normal
Exit Sensor
ON
OFF
With
Bounce
Motor
Exit Sensor
Motor
ON
OFF
ON
OFF
ON
OFF
A: 0.7s
A: 0.7s
Technical Bulletin No. RTB-005
SUBJECT: Sorter Stapler Misfeed DATE: Jan. 31, ’91
PAGE: 3 of 3
Cut-in serial no. Cut-in ROM part no.
A469 -15 # 312010001 ∼ # A4695103A ∼
-16 # 112010001 ∼
-17 # 244010001 ∼
-25 # 122010006 ∼
-27 # 244010009 ∼
-55 # 282010001 ∼
Correction
P.S.
The latest version of the ROM is P/N A4695103B, which replaces P/N A4695103A.
A paper jam will be detected with the old ROM if the copy paper slips and stops moving
forward for 0.1 msec or more in the sorter stapler connector unit.
The jam check interval of the new ROM (suffix B) has been lengthened by 0.1 msec to
reduce the possibility of the paper jam mentioned above.
Technical Bulletin No. RTB-006
SUBJECT: Fusing unit adjustment DATE: Jan. 31, ’91
PAGE: 1 of 2
PREPARED BY: T. Okajima
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
1. SUMMARY
The fusing unit performs less effectively after starting up on a cold morning, when thick
copy paper is used, after operating continuously for a long period of time.
The F20 series copier can be adjusted by SP mode to improve fusing unit performance.
2. ACTION
2-1 Fusing Idling Mode
SP3-3 20 Minutes Fusing Timer FIDL
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FROM: Copier Technical Support Sec.
MODEL:
F20, F21, F22
<Function>
The machine idles for 20 minutes after completion of the warm-up cycle. This heats up the
fusing unit.
<Remark>
The machine performs no idling in regular mode.
2-2 Fusing Temperature
SP34 Fusing Temperature
<Function>
The fusing temperature can be adjusted up or down in 16 steps.
1 step = 1.4°C.
Total temperature change = 22.4°C
Standard setting + step 8
See page 3-53 of F20 S/M
page 5-52 of F21 S/M
page 15-6 of F22 S/M.
Technical Bulletin No. RTB-006
SUBJECT: Fusing unit adjustment DATE: Jan. 31, ’91
PAGE: 2 of 2
2-3 Fusing Pressure Adjustment
See page 3-51 of the F20 S/M
page 5-50 of the F21 S/M
page 15-11 of the F22 S/M.
NOTE: These adjustments increase power consumption and increase the load on the
machine and are to be done only if the customer is dissatisfied with fusing unit
performance.
Technical Bulletin No. RTB-007
SUBJECT: Service call 1 - Exposure DATE: Feb. 28, ’91
PAGE: 1 of 1
PREPARED BY: Takaharu Okajima
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
1. Summary
SC - 1 cannot be cancelled by pressing the SC reset button. This prevents the customer
from just by passing a potentially serious problem. However, when SC - 1 occurs as a
result of electrical noise or some other electrical error, the service representative has to
visit the customer’s office and reset the machine.
We modified the software of the main ROMs so that SC - 1 is less likely to be triggered
by electrical noise.
2. Contents of the modification
If the main board detects an abnormal signal from the lamp regulator lasting 5 ms or
longer, SC - 1 is displayed. The new software extends this detection time from 5 ms to
15 ms, and this reduces occurence ration of the aforementioned problem.
Revision of service manual
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FROM: Copier Technical Support Section
MODEL:
F22
3. Cut in numbers
Parts numbers
P/N A058 7056E : EPROM - 0 - LT
P/N A058 7057E : EPROM - 1 - LT
P/N A058 7156E : EPROM - 0 - A4
P/N A058 7157E : EPROM - 1 - A4
Cut in serial numbers
A058 - 15 ; #3201200923 ∼
A058 - 17 : #2690120001 ∼
A058 - 26 : #12000001 ∼
A058 - 27 : #2690120366 ∼
Technical Bulletin No. RTB-008
SUBJECT: Friction Tabs’ Pressure Adjustment in ADF DATE: Apr 15, ’91
PAGE: 1 of 2
PREPARED BY: T. OKAJIMA
CHECKED BY:
CLASSIFICATION:
Action Required
Troubleshooting
Retrofit Information
Revision of service manual
Information only
Other
FROM: Copier Technical Support Sec.
MODEL: F21, F22
1. Summary.
Add this information to the ADF section of the F21 and F22 service manuals. Since this
adjustment procedure was not explained in these manuals, please read the following
carefully:
Perform this adjustment when:
1. The friction tabs or the separation rollers are replaced.
2. The originals are multi-fed even if the friction tabs and the separation rollers are
cleaned.
[B]
[D]
[C]
[A]
2. Adjustment Procedure.
1. Remove left cover [A] (2 screws), and then remove top cover [B] (2 screws).
2. Close pressure unit [C] and loosen screw [D].
Technical Bulletin No. RTB-008
SUBJECT: Friction Tabs Adjustment DATE: Apr 15, ’91
PAGE: 2 of 2
[E]
[G]
[F]
3. Slide screw [E] in the direction of arrow l (illustration) and slide screw [E] towards arrow
ll until blade stopper [F] touches the friction tab’s bracket [G]. Then tighten the screw.
4. Confirm that the originals are fed correctly.
5. Reassemble.
CAUTION If the problems with original skews, misfeeds or double feeds can not
be solved, replace both the friction tabs and the separation rollers.
For your information:
1. When sliding screw [E] in the direction of arrow I, the pressure of the friction tabs
becomes weak.
2. When sliding screw [E] in the direction of arrow II the pressure of the friction tabs
becomes strong.
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