Ricoh A422 Modification Bulletin DF52
MODIFICATION BULLETIN NO. 06 Page 1 of 3 ISSUED ON: Oct. 31, 90
Model ADF for F11 (Ricoh DF52) Volt/Hz
Modified Article Left Hinge
Reason for
To ensure the DF up and down operation
Modification
Draw
No.
Old Parts
No.
A4221394 A4221393 Left Hinge 1 -- 1 x/o 4 7
New Parts
No.
Description
Date of
Modification
A.B.C. Q’ty Used
Old →
Rank Part No. Description Index No. Page
New
Inter-
change-
ability
Part needed for replacement by new part Parts Catalog
Serial Number
Rank: A : Replace with new parts immediately. B : Replace with new parts at time of repair. C : Replace with new parts at time of overhall.
Interchangeability:
(1) When old and new parts are not mutually interchangeable, use additional parts or an assembly part as indicated in "Parts needed for replacement by new part" to
install the new part.
(2) The mark to the left of the slash indicates whether the old part can be used in the new machine, and the mark to the right indicates whether the new part can be used
in the old machine. x = Not interchangeable o = Interchangeable
MODIFICATION BULLETIN NO. 06 Page 2 of 3 ISSUED ON: Oct. 31, 90
DETAILS OF MODIFICATION
When the operator opens the DF, it may open too
fast after it reaches approximately 30 degrees as
shown in the illustration.
To prevent this, tension of the springs in the DF left
hinge has been changed. The new left hinge will
not let the DF open too fast even after it reaches
approximately 60 degrees.
ADF
60°
30°
Copier
T.Ito, Manager
Copier Technical Support
MODIFICATION BULLETIN NO. 06 Page 3 of 3 ISSUED ON: Oct. 31, 90
MODEL NAME
Ricoh DF52 115/60 USA, Canada A422-17 2330100001
Ricoh DF52 220,240/50 Europe, etc. A422-27 2330100101
V/Hz DESTINATION CODE SERIAL NUMBER
MODIFICATION BULLETIN NO. 07 Page 1 of 2 ISSUED ON: Oct. 31, ’90
Model ARDF for F11 (Ricoh DF52) Volt/Hz
Modified Article Front Frame
Reason for
Parts standardization with ARDF for N230
Modification
Due to parts standardization with the ARDF for the N230, the front frame has been changed with the i nterchangeability
code O/O.
Old P/N New P/N Description
Q’ty
Used
Index No. Page
Date of
Modification
Serial Number
A4651100 A3181100 Front Frame 1 -- 1 27 3
T. Ito, Manager
Copier Technical Support
MODIFICATION BULLETIN NO. 07 Page 2 of 2 ISSUED ON: Oct. 31, ’90
MODEL NAME
Ricoh DF52 115/60 USA, Canada A422-17
Ricoh DF52 220,240/50 Europe, etc. A422-27
V/Hz DESTINATION CODE SERIAL NUMBER
MODIFICATION BULLETIN NO. 9 Page 1 of 2 ISSUED ON: April 15 , ’91
Model ARDF for F11 (Ricoh DF52) Volt/Hz
Modified Article Belt Pressure Roller
Reason for
Parts standardization with other model
Modification
Due to parts standardization with other model, the belt pressure roller has been changed.
The interchangeability is O/O.
Old P/N New P/N Description Q’ty Index Page
A4221116 A4971101 Belt Pressure Roller 1 40 3
Date of
Modification
Serial Number
T. Ito, Manager
Copier Technical Support
MODIFICATION BULLETIN NO. 9 Page 2 of 2 ISSUED ON: April 15 , ’91
MODEL NAME
Ricoh DF52 115/60 USA, Canada A422-17 2331030001
Ricoh DF52 220,240/50 Europe, etc. A422-27 233104XXXX
V/Hz DESTINATION CODE SERIAL NUMBER
MODIFICATION BULLETIN NO. 10 Page 1 of 3 ISSUED ON: June 30, ’91
Model ARDF for F11 (Ricoh DF52) Volt/Hz
Modified Article Friction Belt and Friction Roller
Reason for
To ensure separation
Modification
Draw
No.
Old Parts
No.
A4221354 A4971170 Firiction belt
A4221069 Friction Roller
New Parts
No.
Description
Modification
A.B.C.
Rank Part No. Description
Q’ty Used
Old →
New
1 → 1
1 → 0
Inter-
change-
ability
X/O 69 5
Part needed for replacement by new part Parts Catalog
Date of
Serial Number
Index
No.
72 5
Page
Rank: A : Replace with new parts immediately. B : Replace with new parts at time of repair. C : Replace with new parts at time of overhaul.
Interchangeability:
(1) When old and new parts are not mutually interchangeable, use additional parts or an assembly part as indicated in "Parts needed for replacement by new part" to
install the new part.
(2) The mark to the left of the slash indicates whether the old part can be used in the new machine, and the mark to the right indicates whether the new part can be used
in the old machine. x = Not interchangeable o = Interchangeable
MODIFICATION BULLETIN NO. 10 Page 2 of 3 ISSUED ON: June 30, ’91
DETAILS OF MODIFICATION
To ensure the original separation, we found that it is more effective to increase the angle ( θ) as shown.
These are the modifications on production machines to change the angle from θ1 to θ2 :
1. The friction roller has been removed.
2. The mylar on the friction belt has been removed.
3. The dimension of the friction belt has been changed.
Friction Roller
60
Friction Belt
Old
θ
θ2 > θ
1
Mylar
58.5
Friction Belt
θ
2
New
1
T. Ito, Manager
Copier Technical Support
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