Ricoh A437 Modification Bulletin DF53
MODIFICATION BULLETIN NO. 5 Page 1 of 2 ISSUED ON: Oct. 31, ’90
Model ARDF for COSMOS - 1 Volt/Hz
Modified Article Original Stopper Bracket
Reason for
Parts standardization
Modification
To standardization the 115/220, 240V version machines with 100V version machine, the original stoppe r bracket
shown in the figure has been cahnged.
Old P/N New P/N Description Q’ty Interchangeability Index No. Page
A4371198 A4371170 Original Stopper Bracket 1 ---- 1 X/O 17 3
A4371171 Decal - Original Stopper 0 ---- 1 *57 3
Modification
* New Index
Date of
Serial Number
17
*59
T.Ito, Manager
Copier Technical Support
MODIFICATION BULLETIN NO. 5 Page 2 of 2 ISSUED ON: Oct. 31, ’90
MODEL NAME
RICOH ARDF53 115/60 USA, CANADA A437 - 17 226010XXXX
INFOTEC ARDF5020 220,240/50 EUROPE A437 - 26 373100XXXX
RICOH ARDF53 220,240/50 EUROPE etc. A437 - 27 2260100001
V/Hz DESTINATION CODE SERIAL NUMBER
MODIFICATION BULLETIN NO. 6 Page 1 of 2 ISSUED ON: April 15 , ’91
Model ARDF for COSMOS-1 Volt/Hz
Modified Article Side Roller
Reason for
Parts standardization with other model
Modification
Due to parts standardization with other model, the side roller has been changed. The
interchangeability is O/O.
Old P/N New P/N Description Q’ty Index Page
A4221090 A3181090 Side Roller 2 46 5
Date of
Modification
Serial Number
T. Ito, Manager
Copier Technical Support
MODIFICATION BULLETIN NO. 6 Page 2 of 2 ISSUED ON: April 15 , ’91
MODEL NAME
Ricoh ARDF52 115/60 USA, Canada A437-17 236104XXXX
INFOTEC ARDF5020 220,240/50 Europe A437-26 373041XXXX
Ricoh DF52 220,240/50 Europe, etc. A437-27 226104XXXX
V/Hz DESTINATION CODE SERIAL NUMBER
MODIFICATION BULLETIN NO. 7 Page 1 of 3 ISSUED ON: September 30, ’91
Model ADRF for COSMOS1 Volt/Hz
Modified Article Friction Belt and Friction Roller
Reason for
To ensure separation
Modification
Draw
No.
Old Parts
No.
A4221354 A4971170 Firiction belt 1 → 1 X/O 69 5
A4221069 Friction Roller 1 → 0 72 5
New Parts
No.
Description
Modification
A.B.C.
Rank Part No. Description
Q’ty Used
Old → New
Inter-
change-
ability
Part needed for replacement by new part Parts Catalog
Date of
Serial Number
Index
No.
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. 7 Page 2 of 3 ISSUED ON: September 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
θ2 > θ
θ
1
Mylar
58.5
Friction Belt
θ
2
New
1
T. Ito, Manager
Copier Technical Support
MODIFICATION BULLETIN NO. 7 Page 3 of 3 ISSUED ON: September 30, ’91
MODEL NAME
Ricoh ARDF52 115/60 USA, Canada A437-17 236108XXXX
INFOTEC ARDF5020 220,240/50 Europe A437-26 373041XXXX
Ricoh ARDF52 220,240/50 Europe, etc. A437-27 226108XXXX
V/Hz DESTINATION CODE SERIAL NUMBER
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