Ricoh SAVIN D0AP Service Manual page 563

7. DETAILED DESCRIPTIONS
7.1 OVERVIEW
7.1.1 GUIDANCE FOR THOSE WHO ARE FAMILIAR WITH
PREDECESSOR MODELS
Printer Model
Here is a summary of the differences between this machine and its predecessors.
Item
Specification Print speed
Exposure Toner
unit,
Development
Toner cartridge
unit
lock lever
position
Toner
cross-mixing in
the toner
cartridge
Used toner
recovery path
Toner near-end
control
SM
SP
4520DN/4510DN (This machine)
40 ppm 43 ppm
Single-element Single-element
polymer toner pulverized toner
Cartridge right Cartridge left side
side
No Cross-mixing with an
agitator and
cross-mixing coil
Direct path Separated dual-path
method method
• Definite toner •
near-end
(calculated)
• Toner end •
(physical
detection)
•
7-1
P 502/501 Reason for Change
-
-
Improved
operability with an
operation panel on
the opposite side
Used toner
counter-measures
Improved toner
flow with pulverized
toner
Coil mechanism
modified to improve
toner flow
SC332 (Toner end
Estimated toner
near-end detection error)
(calculated) solutions
Definite toner
near-end
(physical
detection)
Toner end
(calculated from
definite
near-end)
D0AP/D0C4/D0C5/D0C6/M0BQ/M0D1
Overview