Fusing Section - Sharp AR-M550N Service Manual

: Feb. 6 2004
1

6. Fusing section

B. Major parts and signal functions
AR-M550N/U, AR-M620N/U
1
1 2 3 4
+12VS GND2 AC-MON FW-SUB HLCNT3 GND2
CN-4
CN-1
HL1-N HL3-L HL2-L
1 2 3
1 2 3 4
Drawer connector
HL-2L HL-1N HL-2N HL-3N HL-3L HL-1L
A
1 2 3 4
FUM
3
HL1
7
HL3
4
5 6 1 2 3 4
+24VPR HLPR12 GND2 HLCNT2 HLCNT1 GND2
CN-3
Sub power PWB
CN-2
HL1-L HL2-N HL3-N
1 2 3
5 6 9 8 7 6
RTH1 GND2 RTH2 GND2 RTH3 GND2 (NC) (NC) (NC)
B
5 6 1 2 3 4
1 2
1
HL2
4 3
HLTS2
HLTS1
RTH1
2
5
HLTS3
RTH3
2 1
2
1 2
AR-M550/M620/M700 DETAILS OF EACH SECTION 6 - 101
A.
General
This section performs the following functions and operations.
1) Toner attached to paper in the transfer section are heated and
pressed onto paper to fuse.
2) The auxiliary heat roller is used to improve fusing capacity and
separation capacity after fusing.
Copy
5 6
5 4 3 2 1
5 6 7 8 9
B B
6pin 1pin
W W
5pin 2pin
W B
4pin 3pin
3 4
9
2 1
4
1
RTH2 Cross-
sectional
view of
connector
8
Paper
exit
Fusing roller
(Heating)
Paper exit Fusing Heater lamps
roller motor (2 pcs.)
Sub power PWB
1 RTH1 1
2 GND2 2
3 RTH2 3
4 GND2 4
5 RTH3 5
6 GND2 6
7 (NC) 7
8 (NC) 8
9 (NC) 9
A
B
Fusing
Cleaning
Fusing roller
scraper
(Pressing)
1
Auxiliary
heat roller
Heat lamp
(1 pc)
PCU