2DF
2-1-13
(1) Formation of magnetic brush
The developing roller consists of a magnet roller with four poles and a sleeve roller. Rotation of the sleeve roller around
the magnet roller entrains toner, which in turn forms a magnetic brush at pole N1 on the magnet roller. The height of the
magnetic brush is regulated by the doctor blade; the developing result is affected by the position of the poles on the
magnet roller and the position of the doctor blade.
A developing bias voltage generated by the high-voltage transformer PCB (HVTPCB) is applied to the developing roller
to provide image contrast.
A
A: Distance between the doctor blade and developing roller; 0.23 to 0.35 mm
N1:870
×
10
-4
T
N2:420
×
10
-4
T
S1:700
×
10
-4
T
S2:910
×
10
-4
T
N1
90
88
88
S1
S2
N2
Doctor blade
Developing roller
Figure 2-1-15 Forming a magnetic brush
TNFSOL
TNFSOL
TCS
TNS SIG
TNS
DB REM
24 V DC
HVTPCB
MPCB
CN1-1
DB
CN1-2
CN9-B2
TCS
CN9-A5
CN9-A9
CN7-1
CN7-2
Figure 2-1-16 Developing section block diagram
Summary of Contents for Ri 2530
Page 59: ...2DF 1 3 39 This page is intentionally left blank...
Page 124: ...1 4 37 2DF This page is intentionally left blank...
Page 130: ...1 4 41 2DF This page is intentionally left blank...
Page 138: ...1 4 47 2DF This page is intentionally left blank...
Page 151: ...1 4 56 2DF This page is intentionally left blank...
Page 326: ...AD 63...
Page 329: ...3CX 1 1 2 1 1 2 Part names Figure 1 1 1 Duplex unit...
Page 330: ...3CX 1 1 3 1 1 3 Machine cross section Figure 1 1 2 Paper path Duplex unit...
Page 346: ...DF 78...
Page 349: ...3B5 1 1 2 1 1 2 Part names Figure 1 1 1 1 Intermediate tray 2 JAM release lever 3 Eject tray...
Page 383: ...J 1402...
Page 386: ...3B6 1 1 2 1 1 2 Part names Figure 1 1 1 1 Job separator tray 2 LED...
Page 387: ...3B6 1 1 3 1 1 3 Machine cross section Figure 1 1 2 Paper path...
Page 388: ...3B6 1 1 4 1 1 4 Drive system Figure 1 1 3 1 Gear 20 2 Gear 28 3 Gear 28 4 Eject roller gear...
Page 399: ...PF 70...
Page 401: ...1 1 2 3CC 2 4 Appendixes Timing chart No 1 2 4 1 Timing chart No 2 2 4 2 Wiring diagram 2 4 3...
Page 403: ...3CC 1 1 2 1 1 2 Parts names 1 Upper drawer 2 Lower drawer 3 Desk left cover Figure 1 1 1 3 1 2...
Page 404: ...3CC 1 1 3 1 1 3 Machine cross section Paper path Figure 1 1 2 Machine cross section...
Page 436: ...RA 1...
Page 438: ...3CP 1 1 1 1 1 1 Part names Figure 1 1 1 Switchback unit Switchback unit open close lever...
Page 439: ...3CP 1 1 2 1 1 2 Machine cross section Figure 1 1 2 Paper path Switchback unit...
Page 456: ...PF 75...
Page 458: ...1 1 2 5FF 2 4 Appendixes Timing chart No 1 2 4 1 Timing chart No 2 2 4 2 Wiring diagram 2 4 3...
Page 461: ...5FF 1 1 3 1 1 3 Machine cross section Paper path Figure 1 1 3 Machine cross section...
Page 499: ...Fax System C...
Page 501: ...1 1 2 3CM...
Page 509: ...3CM 1 1 8...
Page 553: ...3CM 1 3 40...
Page 565: ...3CM 1 5 2...
Page 570: ...3CM 2 1 2...
Page 581: ...Fax System F...