Ricoh GENERAL Technical Bulletin PPFMLT

Leak Current

(On CFO / CS1 FCU)

Diode

COM

COM

Regulator

Technical Bulletin No. Multi-001

SUBJECT: Memory Back-up Battery

DATE:

Jan. 19, 1995

PREPARED BY: Y.Okunishi
CHECKED BY: S.Hamano

CLASSIFICATION:

Action Required Revision of service manual

FROM: 2nd T.S. Section

MODEL:

CSO, CFO, CS1, LHO
Troubleshooting Information only
Retrofit Information Other

[Symptom]

Stored documents in the me mory migh t be erase d when the main power goes down .
A power failure report is printed with the following informa tion.

• Memory Tx Files: Destination names or fax numbers are print ed.

• Substitute Recept ion Files: The Sender’s RTI or CSI is printed if they are programmed.

CSO rejects incoming messages without RTI or CSI because
of the factory setting.

• Memory Lock Files: Programmed Quick Numbers are printed.

[Cause]

Power loss from the memory back-up battery on FCU caused by excessive charge current, for
the following reasons.

(1) Leak current from Diode
The battery is charged after it is alread y

24V

24V

fully charge d. This type of bat te ry

is damaged if this occurs.
(2) Excessive charge voltage (CFO,

CS1,LHO) The target charge voltage
was 6.2V against 6.4V or under which is
recommended by the battery maker.
This margin was too small for this battery.

Zener
Diode

Battery

COM

[Modification]

See MB C Series-048A.

OUT

Technical Bulletin No. Multi-001

SUBJECT: Memory Back-up Battery

[Action Taken]

1. Install the modified FCU to deal with customer claims.

2. Request technicia ns no t to turn off the main power if a document is sto red
in the memory.

[Note]

• Stored data other than docume nts is not erased even if the main power goes down.

DATE:

Jan. 19, 1995

Technical Bulletin No. Multi-002

SUBJECT: Toner Spillage during Transportation

PREPARED BY: Y. Okunishi
CHECKED BY: M. Iwasa

CLASSIFICATION:

Action Required Revision of service manual
Troubleshooting Information only
Retrofit Information Preventive Action

Background: Machines have been sent to cu sto mers after pre-installation and sent back to the
service center for repair.

Problem: Toner had spread inside the machin e du ring transportation.
Cause: Toner leaked from the development unit, the toner cartridge, or somewhe re

in the toner path during tran sportation.

Preparation for transportation:

(1) Transportation withou t he avy vibra tio n

(Example: A technician should carry the machine with care.)

• F/L series fax machines:
The development unit can be connected to a CTM with toner.
However, the toner path under the CTM must be covered by some
adhesive tape. See the attached illust rat ion.

• C series fax machines:
Follow RTB No. CSO-006

• Other order machines:
Follow (2) below.

FROM: 2nd T.S. Section

MODEL:
All laser plain paper fax
machines

DATE:

Jul. 15.1995

(2) Transportation with heavy vibration

(If a third party handles the transportation, follow this procedure.)

• F/L series fax machines:
Remove the development unit and the CTM fro m the machin e if toner
has been installed. They must not be delivered in the same box as the
machine, because they contain toner which may spill out. The toner
inside the machine must be clean ed away or th e toner path under the
CTM must be covered with tape.

• C series fax machines and others:
Remove the development unit and CTM (or Toner Cartridge) from
the machine if toner has been inst alle d, and clean the toner from
inside the machine.
The removed development unit and CTM must not be delivered
in the same box as the machine.

Technical Bulletin No. Multi-002

SUBJECT: Toner Spillage during Transportation

Inside of FX6 and LSO

Drum

DATE:

Jul. 15.1995

Toner path

Note: Adhesion of the tap e sho uld not be strong. Otherwise, it may n ot be ta ken off

cleanly from the machine, or th e toner path may be damaged whe n it is take n
off.

Please request tape samples for th e FX6 and LSO from Ricoh.

Adhesive tape

Technical Bulletin No. Multi-003

Page 1/2

SUBJECT: Harness for PFU

PREPARED BY: Y. Okunishi
CHECKED BY: M. Iwasa

CLASSIFICATION:

Action Required Revision of service manual
Troubleshooting Information only
Retrofit Information Other

Problem: The Paper Feed Unit may not work correctly.
Cause: Wires of the harness (H511 5528) from th e FCU to th e rela y co nnectors for the paper

feed unit (PFU) are not allocated properly.

Affected machines:

Fax 3500L S/N R8750600001 ~ R87 5070 06 00
NRG9665 S/N 6355060620 ~ 6355060671
Savin Fax 3670 S/N 0950600001 ~ 0950700120
Fax 5600L S/N M2050600001 ~ M20 5070 05 00
Lanier Fax 7550 S/N L7555060677 ~ L7555060780
Omnifax L540 S/N L5405060271 ~ L5405060330

FROM: 2nd T.S. Section

MODEL: Fax3500L(USA),
NRG9665(USA), Savin Fax3670
Fax5600L(USA),
Lanier Fax7550, Omnifax L540

DATE:

July 31, 1995

Action Required:

The harness should be checked before the start of the PFU installation because th e
FCU or the PFU PCB may become damaged.

Follow the attached proce du re be fo re PFU installation and chang e th e ha rne ss
to a new one if it is bad.

CN B

RTB No. Multi-003

Page 2/2

Harness Check Procedure

1. Remove the Rear Cover and Left Cover.

2. Unplug the connector CN28 on the FCU.

3. Unplug the connect ors CN A and CN B on the relay con ne ctor board located at the bot to m o f
Main Frame.

Harness from FCU
(CN A & B)

Main Frame

Paper Feed Unit (PFU)

Relay connectors

Harness from PFU

4. Check the continuity of the harness pin by pin using a mult imet er.
See below for what the correct allocation of all wires of the harness should be.

ABCDEFGHI

CN28 (to FCU)

J1234

5

6XX1234XX

CN A

(to PFU)

View from the side without the plastic cove r

Check the continuity of the following.

A of CN28 to 4 of CN B
⇓ ⇓
D of CN28 to 1 of CN B

E of CN28 to 6 of CN A
⇓ ⇓
J of CN28 to 1 of CN A

Page 1/3

Technical Bulletin No. Multi - 004A

SUBJECT: Fusing Unit

PREPARED BY: Y.Okunishi
CHECKED BY: S.Fujii

CLASSIFICATION:

Action Required Revision of service manual
Troubleshooting Information only
Retrofit Information Other

A: "NOTE" is added to page 2/3.
SYMPTOM:

Background on received and copied documents.

Cause:

Hot Roller failure as a result of not changing the Cleaning Pad at the 10K PM.
Failure to change the Cleaning Pad results in dirty Strippers and Thermostat and
then Hot Roller failure.
As the machine warms up from the standby temperature to the fusing
temperature, it is exposed to slight overheating before the temperature levels
off. This leads to softening of the Teflon layer on the Hot Roller. As a result, the
Teflon layer peels off in the areas where the Strippers and other parts come in
contact with it. Dirty Strippers and Thermostat put more stress on the Hot Roller and
cause premature Hot Roller failure.
Also, the dirty Thermistor causes the Hot Roller to overherat and fail prematurely.

FROM: Quality Assurance Center

DATE:

Oct. 15, 1996

MODEL:

CSO, CRO, CS1, CFO,
CGO

A second cause can be a damaged (bent ) Thermistor from a previous service visit.
The damaged Thermistor causes the Hot Roller to overheat and fail prematurely.

SOLUTION:

Ricoh recommends replacing the Cleaning Pad at the 10K PM. However, this is
sometimes ignored. Realizing this, Ricoh will conduct the following modifications to
protect the Hot Roller from the failure mentioned above.

No. Old Part New Part Description Qty Used Interchangeability

1 H0812121 H0812123 Stripper Spring 2 → 2 X / O

H0812120 H5132119 Stripper

2

3

H0812137

H0815035
H0812141
03130080B

(Separation Pawl)
Thermistor Assembly
Thermistor
Bracket
Screw - M3x8

2 → 2 X / O

1 → 0
1 → 1
1 → 1
0 → 1

X / O as an
assembly

4 H0812100 H0819600 Hot Roller Kit 1 → 1 X / O

Page 2/3

Technical Bulletin No. Multi - 004A

SUBJECT: Fusing Unit

DATE:

Oct. 15, 1996

Hot Roller Kit:

The hot rollers shipped from the SPC in Japan will be replaced by the

Hot Roller Kit in July.
This kit will be comprised of the following: Hot Roller, Cleaning Pad, Thermistor,
Thermistor Bracket, Screw, Strippers (2), Stripper Springs (2) and Installation Sheet.
The individual Hot Roller will be no longer available. The Cleaning Pad will
continue to be a Service Part.

Ricoh recommends change of the above modified parts and Cleaning Pad when the failed
Hot Roller is replaced with the new one.

NOTE
(A): Please refer to the following instructions and fix the cover to the fusing unit
and check that the harness is not pinched before installing the fusing unit in the
machine.

If the metal wire of the harness contacts the thermistor bracket, a no power
condition may occur. Please check the thermistor harness if this occurs.

Fusing Cover

(Bad)

Edge of the cover may damage
the harness

Edge

(Good)

Fusing Unit

Installation Procedure for the Thermistor

1. Assemble the thermistor and the bracket
with the screw.

Bracket - Thermistor
H0812141

Thermistor - Fusing Unit
H0815035

Do not bendthis part

2. Install the
Thermistor Ass’y

( ✻ 4)

Thermistor - Fusing Unit
H0815035

Harness - Thermostat

(✻ 3)

Page 3/3

Thermostat - Fusing Unit
H0812134

Screw - M3 x 8
03130080B

(✻ 1)

Note: Set the projection on
the thermistor into
the hole in the bracket.

Note: ✻ 1 Place the thermostat harness under the part of the bracket.
✻ 2 Do not cross the thermostat harness and the thermistor harness.
✻ 3 Push the thermistor head (sensor) gently against the hot roller witha finger to make sure that the thermistor
head touches the hot roller surface. Do not push it strongly.
✻ 4 Do not bend the thermistor neck (spring plate) when installing or cleaning it .
If the thermistor is bent, replace it.

(✻ 2)

Bracket - Thermistor
H0812141

Stay - Fusing Unit - Upper
H0812175

 T

Model:

FX4, FX6, FX6MK2, FX6CD, FX7, LX7, LSO, AD1

echnical

ulletin

B

Date:

31-Aug-97

No:

PAGE: 1/4

005

Subject:
From:
Classification:

The NEST card has been released for Nest Autoroute function in fax machines and for fax
units in the AD series.

This technical bulletin contains the revisions to the Nest Autoroute service manual. Procedures
for reading and writing user-programmed data by RDS have been added. Only the
Installation section was changed.

For details on the models that can use the NEST card, please check the product launch
information for the models.

Novell Nest Autoroute Function

2nd Technical Support Section

Troubleshooting
Mechanical
Paper path
Other ( )

Part information
Electrical
Transmit/receive

Prepared by:

Action required
Service manual revision
Retrofit information

S.Yoshio

RC RE ASIA

✶✶ ✶✶ ✶✶