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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1
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