Service Manual
CONTENTS
3 DIS./ASSEMBLY1 OUTLINE3 DIS./ASSEMBLY2 UNIT EXPLANATION
[7] PCL/TSL Control ....................................2-F-6
DEVELOPING UNIT............................................. 2-G-1
[1] Composition........................................... 2-G-1
[2] Mechanisms .......................................... 2-G-1
[3] M3 (Developing Unit Drive) Control....... 2-G-2
[4] Developing Bias Control........................ 2-G-2
[5] Toner Density Control............................ 2-G-3
[6] Dmax Control......................................... 2-G-4
[7] Gradation Correction Control................. 2-G-6
[8] Dot Diameter Correction Control........... 2-G-7
[9] FM2 (Developing Suction) Control ........ 2-G-8
TONER SUPPLY UNIT..........................................2-H-1
[1] Composition............................................2-H-1
[2] Mechanisms ...........................................2-H-1
[3] Toner Level Detection Control................2-H-2
[4] M11 (Toner Supply 1) Control................2-H-3
CLEANING/TONER RECYCLE UNIT .................... 2-I-1
[1] Composition............................................. 2-I-1
[2] Mechanisms ............................................ 2-I-1
[3] M14 (Blade) Control ................................ 2-I-2
TRAY 1/2 PAPER FEED UNIT.............................. 2-J-1
[1] Composition............................................ 2-J-1
[2] Mechanisms ........................................... 2-J-1
[3] First Paper Feed Control ........................ 2-J-3
[4] Paper Up Drive Control .......................... 2-J-5
[5] Paper Size Detection Control................. 2-J-7
[6] No paper detection control ..................... 2-J-8
TRAY 3 PAPER FEED UNIT.................................2-K-1
[1] Composition............................................2-K-1
[2] Mechanisms ...........................................2-K-1
[3] First Paper Feed Control ........................2-K-3
[4] Paper Up Drive Control ..........................2-K-4
[5] Paper Size Detection Control.................2-K-5
[6] No paper detection control .....................2-K-5
BY-PASS TRAY..................................................... 2-L-1
[1] Composition............................................ 2-L-1
[2] Mechanisms ........................................... 2-L-1
[3] First Paper Feed Control ........................ 2-L-2
[4] Paper Up/down Control.......................... 2-L-3
[5] Paper Size Detection Control................. 2-L-4
[6] No paper detection control ..................... 2-L-4
VERTICAL PAPER CONVEYANCE SECTION.... 2-M-1
[1] Composition........................................... 2-M-1
[2] Mechanisms .......................................... 2-M-1
[3] Vertical Paper Conveyance Control ...... 2-M-2
ADU .......................................................................2-N-1
[1] Composition............................................2-N-1
[2] Mechanisms ...........................................2-N-2
[3] Loop/Second Paper Feed Control..........2-N-9
[4] Paper Conveyance Control ..................2-N-10
[5] Paper Reverse and Exit Control...........2-N-11
[6] ADU Paper Feed/Reversal Control ......2-N-13
[7] ADU Paper Conveyance/Feed
Control..................................................2-N-15
FIXING UNIT.........................................................2-O-1
[1] Composition ...........................................2-O-1
[2] Mechanisms...........................................2-O-2
[3] M16 (Web Drive) Control .......................2-O-5
[4] Fixing Temperature Control ...................2-O-6
[5] SD3 (Fixing Guide) Control....................2-O-8
OTHER KINDS OF CONTROL ............................. 2-P-1
[1] Parts Energized when the Main
Switch is OFF.........................................2-P-1
[2] Parts that Operate when the SW1
(Main) is Turned ON...............................2-P-2
[3] Cooling Fan Control ............................... 2-P-3
[4] Operation Panel Control......................... 2-P-6
[5] Counter Control...................................... 2-P-8
[6] Option Control........................................2-P-9
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