Ricoh B051 Service Manual page 1037

Tech Service Bulletin No. B051/B052 – 030
Improvements to the PCU are being introduced with this Technical Service Bulletin due to compatibility with
the firmware and development units. The PCU does not influence the symptoms listed above. All
B051/B052 copiers manufactured after the serial numbers listed below will have the new style development
units and PCU installed during production.
Development Unit Modifications
The following modifications were applied to the Development Unit:
The doctor roller plate spring has been removed to optimize the pressure distribution of the roller.
The same bias applied to the doctor roller and toner supply roller is now applied to the entrance seal
bracket as well, in order to ensure a uniform charge across all three components.
The diameter of the Cyan doctor roller has been increased from 10 mm to 12 mm.
NOTE: The diameter of the doctor roller for the other colors has been 12 mm from the beginning of mass
production.
OLD PART NO. NEW PART NO.
B0523204
B0523205
B0523206
B0523207
Changing SP Mode Settings After Installing New PCU, Development Unit or Both
The following information is required to change SP Mode settings after updating to the November 2003
production machine firmware.
Important Points:
The SP Modes must be set to match the level of subassemblies in the B051/B052 main frame. It is
necessary to change these SP mode settings when replacing the Magenta or Black development units,
OPC, and updating the Controller/BICU firmware. It is not necessary to change the SP settings when
replacing the Yellow or Cyan development units.
K Development unit
New Development unit
Old Development unit
CÓPIA NÃO CONTROLADA
MODEL NAME
Gestetner DSC324
Lanier LD032C
Ricoh Aficio 1224C
Savin C2408
Gestetner DSC224
Lanier LD024C
Ricoh Aficio 1232C
Savin C3210
Gestetner DSC324
Lanier LD032C
Ricoh Aficio 1224C
Savin C2408
Gestetner DSC224
Lanier LD024C
Ricoh Aficio 1232C
Savin C3210
B0523214 Development Unit - BK
B0523215 Development Unit – M
B0523216 Development Unit – Y
B0523217 Development Unit – C
PCU
CÓPIA NÃO CONTROLADA
SERIAL NUMBER
J2536805469
J2636900001
J2530800001
J2630800001
DESCRIPTION
New PCU Old PCU
Setting C Setting B
Setting A Setting D
REFERENCE
QTY INT PAGE ITEM
1 1 35 27
1 1 35 28
1 1 35 29
1 1 35 30
Page 2 of 6