Sharp AR-BC320, Service Manual, Page: 41 / 344

AR-BC320 EXTERNAL VIEW AND INTERNAL STRUCTURE 6 - 12
(3) Sensors
(4) Cross-section diagram
No. Name Code Type Function/operation Output
1 Tray original length sensor 2 DLS2 Photo interrupter Detects length of original in tray (long originals) TP3 becomes HIGH when original is detected.
2 Tray original length sensor 1 DLS1 Photo interrupter Detects length of original in tray (short originals) TP2 becomes HIGH when original is detected.
3 Original width detector
volume DWVR Volume Detects width of original in tray TP1 voltage changes within range of 0 to 5V
depending on width of original.
4 ADF front open sensor FOS Photo interrupter ADF open/closed status sensor TP18 becomes HIGH when ADF is open.
5 Empty sensor EMPS Photo interrupter Detects the presence of an original in document
feed tray
TP5 becomes LOW when an original is
detected.
6 Timing sensor TIMS Reflection sensor Detects when the original has been transported
as far as the timing sensor section
TP11 becomes 1V or lower when an original
is detected.
7 Resist sensor REGS Reflection sensor Detects when the original has been transported
as far as the resist sensor section
TP8 becomes 1V or lower when an original is
detected.
8 Document feed open sensor DFOS Photo interrupter Detects the open/closed status of document
feed cover
TP4 becomes HIGH when the cover is open.
9 Document feed open switch DFSW Microswitch Detects the open/closed status of document
feed cover Pin 2 on CN11 becomes 24V when the cover
is open (when ADF is closed).
10 Document exit open sensor DEOS Photo interrupter Detects the open/closed status of the document
exit cover
TP17 becomes HIGH when the cover is open.
11 ADF open switch AOSW Microswitch Detects the open/closed status of the ADF TP47 becomes HIGH when the cover is open.
12 Reverse sensor DRS Reflection sensor Detects when the original has been transported
as far as the reverse sensor section
TP14 becomes 1V or lower when the original
is detected.
13 Document exit sensor DES Photo interrupter Detects when the original has been transported
as far as the document exit sensor section
TP16 becomes HIGH when an original is
detected.
No. Name Function/operation
1 Pickup roller Picks up the document.
2 Document feed roller Presses document onto the separation pad to feed.
3 Separation pad Separates document.
4 Resist roller Corrects paper skew and transports document.
5 Idle roller The follower roller which is pressed onto the resist roller.
6 Belt roller L Drive roller of DF belt.
7 Idle roller Presses DF belt onto the platen glass.
8 DF belt Transports document on the platen glass.
9 Idle roller Presses DF belt onto the platen glass.
10 Belt roller R The follower roller which is pressed onto the resist roller.
11 Reverse roller Reverses document or discharges document.
4
9
5
7
8
6
11
10
12
13
1
2
3
1
2
3
4
5
6 7 8 9 10 11