Ricoh F400 Service-Handbuch

Technical Bulletin No. RTB-005

SUBJECT: F400/F410 Dual Job Feeder separation belts

(manual correction) DATE:SEP.15.’93

PAGE: 1 of 3

PREPARED BY: S.MANO

CHECKED BY: FROM: Copier Technical Support Group

CLASSIFICATION:

Action Required

Troubleshooting

Retrofit Information

Revision of service manual

Information only

Other

MODEL: F400/F410

The quantity of the separation belt have been changed from two to four.

Reason of the modification:

On the original printed by the laser printer, the toner may not be fused sufficiently and the

image may smeared by the separation belts.

To prevent this, two more separation belts are added to widen the contacting area

between the separation belts and the original so that the separation pressure is not

concentrated to the narrow area.

After this modification, these separation belts are still PM parts and the replacement

interval is 1PM (120k copies) as same as before this modification.

Because of this modification, the illustrations in page 7, 14, 15, 34 and 35 should be

changed. The quantity of the separation belts should be doubled. There is no correction

except illustrations.

Manual corrections:

Page 7 - upper illustration

[A]

[B]

[C]

[D]

[E]

[F]

Technical Bulletin No. RTB-005

SUBJECT: F400/F410 Dual Job Feeder separation belts

(manual correction) DATE:SEP.15.’93

PAGE: 2 of 3

Page 14 lower illustration

Page 15 illustration

[A]

[B]

[C]

[D]

[E]

[A]

[B]

[C]

[D]

Technical Bulletin No. RTB-005

SUBJECT: F400/F410 Dual Job Feeder separation belts

(manual correction) DATE:SEP.15.’93

PAGE: 3 of 3

Page 34 lower illustration

Page 35 illustrations

[E]

[D]

[A]

[B]

[C]

[D]

Technical Bulletin No. RTB-006

SUBJECT: F400/F410 Troubleshooting DATE:Nov.30, ’93

PAGE: 7 of 10

9. DJF Original Skew

< Phenomenon>

If original skews occur as illustrated even if the DJF height is correctly adjusted, perform

the following adjustment.

< Possible cause>

This skew is caused because the transport belt is faster than the feed-in motor speed,

even if both motor speeds are within the specification.

< Countermeasure>

1. Feed-in motor speed adjustment

Adjust the feed-in motor speed so that the motor speed becomes higher (within

specification).

1–1 Turn DIP SW 101-1, 2, 4 to "ON".

1–2 Turn DIP SW 102-1 to "ON".

1–3 Turn VR 103 towards "H" to turn LED 101 (Red) on.

1–4 Turn VR 103 towards "L" to turn LED 102 (Green) on.

2. Transport belt motor speed adjustment

Adjust the transport belt motor speed so that the motor speed becomes lower (within

specification).

1–1 Turn DIP SW 101-1, 2, 4 to "ON".

1–2 Turn DIP SW 102-2 to "ON".

1–3 Turn VR 104 towards "L" to turn LED 103 (Red) on.

1–4 Turn VR 104 towards "H" to turn LED 102 (Green) on.

Rear

Left scale

Technical Bulletin No. RTB-008

SUBJECT: DJF Multiple feeding DATE:Nov.30, ’93

PAGE: 1 of 2

PREPARED BY: S. MANO

CHECKED BY: FROM: Copier Technical Support Group

CLASSIFICATION:

Action Required

Troubleshooting

Retrofit Information

Revision of service manual

Information only

Other

MODEL: F400/F410

< Phenomenon >

Original multiple feeding occurs when there is high friction between the originals. This

tends to occur especially when the originals have staple holes, or computer forms with

rough edges.

< Possible cause >

When the originals [A] comes between the feed rollers [B] and the separation belts [C],

they meet the mylar [D] between them and the separation belts. This guide mylar

transports the originals smoothly to the gap between the feed rollers and the separation

belts. The mylar length determines the original separation force. If the mylar is longer, the

area where the originals touch the separation belt becomes narrower, therefore the

separation force become weaker. If the mylar is shorter, the separation force becomes

stronger. (If it is too short, too much separation force stops original feed)

As a result of our investigation, we found that making the mylar 2mm shorter is the best

condition (higher separation ability without feeding error).

[C]

[D]

[A]

[B]

Technical Bulletin No. RTB-008

SUBJECT: DJF Multiple feeding DATE:Nov.30, ’93

PAGE: 2 of 2

< Countermeasure >

Replace the original guide mylars (2 mylars per machine). New part is the assembled part

of the mylar and the bracket. New part number is A3761254.

For the cut-in serial number, please refer to the modification bulletin which will be issued

soon.

Guide mylar ass’y : Part number A3761254

Technical Bulletin No. RTB-009

SUBJECT: Installation procedure DATE:Nov.30, ’93

PAGE: 2 of 3

3. Caution for DJF shipping tape removal (dual job feeder service manual - installation

procedure page, 24)

When removing the tape [B] fixing the original press roller shaft [C], be careful to confirm

that the shaft is correctly in the holder [D]. It is possible that the shipping tape adheres

strongly to the shaft. The shaft migit be pulled out from the holder when the tape is

removed.

If the shaft is out of position, the original will not feed.

[B]

[D]

[C]

Technical Bulletin No. RTB-010

SUBJECT: DJF feed roller assembly replacement DATE:Nov.30, ’93

PAGE: 1 of 3

PREPARED BY: S.MANO

CHECKED BY: FROM: Copier Technical Support Group

CLASSIFICATION:

Action Required

Troubleshooting

Retrofit Information

Revision of service manual

Information only

Other

MODEL: F400/F410

1. Manual correction

In the feed roller replacement procedure (page 32 to 33), there are steps asking to remove

the original table and original guide. Actually, this procedure is not necessary. Please skip

steps 2, 3, 4, and 5. You can directly access the feed roller.

2. Procedure change due to modification.

In the domestic market, we have experienced that the customer took off the feed roller

assembly [A] when removing a jammed original. When the jammed original is pulled to the

front, the feed rollers are pulled to the front and the joint part [B] comes out from the drive

shaft. To prevent this, The middle roller [C] position has been changed (to the rear) as

shown below.

[A]

[C] [B]

[B]

Old

New

[C]

Guide Plate

Front

Technical Bulletin No. RTB-010

SUBJECT: DJF feed roller assembly replacement DATE:Nov.30, ’93

PAGE: 2 of 3

Before the modification, the middle roller could be shifted to the front when the feed roller

was pulled to the front. After the modification, when the feed roller is pulled to the front,

the middle roller hits the guide plate and it cannot be moved to the front. This prevents the

joint part from being separated by mistake.

To replace the feed roller assembly, the following procedure is necessary before

performing step 6 (slide the feed roller assembly to the front, then remove it).

* Remove the guide mylars

* Remove the snap ring.

* Hold the feed roller.

After the modification, procedure "14.2 feed roller replacement" is changed as shown in

next page.

Technical Bulletin No. RTB-010

SUBJECT: DJF feed roller assembly replacement DATE:Nov.30, ’93

PAGE: 3 of 3

1. Turn off the main switch then open the feed cover [A].

2. Remove the guide mylars [B] ( 1 screw each ).

3. Remove the snap ring [C].

4. Slide the roller [D] to the rear.

5. Hold the feed roller [E] then slide the shaft to the front, then remove the feed roller

assembly as shown.

6. Remove the four snap rings [F], then remove the feed rollers.

7. Install the new feed rollers, then re-assemble the machine.

[E]

[C]

Rear

[F]

[D] Front

[B]

[A]

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