Read Sharp MX-6500N / MX-7500N (serv.man18) Service Manual online
MX-7500N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 10
Signal name
Name
Type
Function/Operation
1TUD_CL
Transfer mode detector (CL)
Light transmission
Detects separation of the transfer belt and the transfer mode.
(Detection is made by combination of 1TUD_CL/1TUD_K signals.)
(Detection is made by combination of 1TUD_CL/1TUD_K signals.)
1TUD_K
Transfer mode detector (BK)
Light transmission
Detects separation of the transfer belt and the transfer mode.
(1TUD_BK)
(Detection is made by combination of 1TUD_CL/1TUD_K signals.)
(1TUD_BK)
(Detection is made by combination of 1TUD_CL/1TUD_K signals.)
2TBMD_F
2nd transfer belt skew detector F
Detects the edge of 2nd transfer belt F.
2TBMD_HP
2nd transfer belt skew correction motor
home position sensor.
home position sensor.
Detects paper pass in the transport roller 21.
2TBMD_R
2nd transfer belt skew detector R
Detects the edge of 2nd transfer belt R.
APPD1
ADU paper pass detector 1
Light transmission
Detects paper entry in the ADU section.
APPD2
ADU paper pass detector 2
Light transmission
Detects paper pass in the transport roller 21.
BD
Laser beam sensor
Pin diode
Detects laser beams.
C3LUD
Paper upper limit detector
(Paper feed tray 3)
(Paper feed tray 3)
Light transmission
Detects the upper limit lift position of paper in the paper feed tray.
C3PED
Paper empty detector (Paper feed tray 3)
Light transmission
Detects paper.
C3PFD
Paper pass sensor (Paper feed tray 3)
Light reflection
Detects paper pass in the paper transport section of the paper feed tray
3.
3.
C3SPD
Paper remaining quantity detector
(Paper feed tray 3)
(Paper feed tray 3)
Light transmission
Detects the paper remaining quantity.
C3SS1 - 4
Paper size detector (Paper feed tray 4)
Tact switch
Detects the paper size. Detects open/close of the paper feed tray.
C4LUD
Paper upper limit detector
(Paper feed tray 4)
(Paper feed tray 4)
Light transmission
Detects the upper limit lift position of paper in the paper feed tray.
C4PED
Paper empty detector (Paper feed tray 4)
Light transmission
Detects paper.
C4PFD
Paper pass sensor (Paper feed tray 4)
Light reflection
Detects paper pass in the paper transport section of the paper feed tray
4.
4.
C4PWD
Paper width sensor (Paper feed tray 4)
Resistance volume
Detects the paper width.
C4SPD
Paper remaining quantity detector
(Paper feed tray 4)
(Paper feed tray 4)
Light transmission
Detects the paper remaining quantity.
C4SS1 - 4
Paper feed tray size detector
(Paper feed tray 4)
(Paper feed tray 4)
Tact switch
Detects the paper size. Detects open/close of the paper feed tray.
CCHPD_C
MC cleaner HP sensor (C)
Light transmission
Detects the MC cleaner home position. (CCHP_C)
CCHPD_K
MC cleaner HP sensor (K)
Light transmission
Detects the MC cleaner home position. (CCHP_K)
CCHPD_M
MC cleaner HP sensor (M)
Light transmission
Detects the MC cleaner home position. (CCHP_M)
CCHPD_Y
MC cleaner HP sensor (Y)
Light transmission
Detects the MC cleaner home position. (CCHP_Y)
CCMD_C
MC cleaner shift sensor (C)
Light transmission
Detects the shift distance of the MC cleaner.
CCMD_K
MC cleaner shift sensor (K)
Light transmission
Detects the shift distance of the MC cleaner.
CCMD_M
MC cleaner shift sensor (M)
Light transmission
Detects the shift distance of the MC cleaner.
CCMD_Y
MC cleaner shift sensor (Y)
Light transmission
Detects the shift distance of the MC cleaner.
CIS
Image position sensor
Contact image sensor
Detects the paper edge position in the off-center direction in the PS
section.
section.
DEDC_L
DRUM encoder sensor (C_L)
Light transmission
Detects the drum rotation speed.
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