Electrical Component Defects; Sensors - Gestetner A294 Service Manual

Rev.9/2001

7.2 ELECTRICAL COMPONENT DEFECTS

7.2.1 SENSORS

Component
(Symbol)
Scanner Home
Position (S1)
Original Width (S2)
Original Length 1
(S3)
Original Length 2
(S4)
Drum Potential
Sensor (S5)
Toner Density (S6)
Image Density (S7)
Toner Supply Motor
(S9)
Upper Toner Bottle
(S10)
Lower Toner Bottle
(S11)
Upper Bottle Inner
Cap (S12)
Lower Bottle Inner
Cap (S13)
SM
CÓPIA NÃO CONTROLADA
CN Condition
Stays On
CN555-2
(MCU)
Stays Off
Stays On
CN555-6.7.8
(MCU)
Stays Off
Stays On
CN555-11
(MCU)
Stays Off
Stays On
CN555-14
(MCU)
Stays Off
Open
CN609-10
(BCU)
Shorted
Stays On
CN610-B6
(BCU)
Stays Off
Open
CN609-5
(BUC)
Shorted
Stays On
CN613-B8
(BCU)
Stays Off
Stays On
CN623-A2
(BCU)
Stays Off
Stays On
CN623-B2
(BCU)
Stays Off
Stays On
CN623-A5
(BCU)
Stays Off
Stays On
CN623-B5
(BCU)
Stays Off
7-37
CÓPIA NÃO CONTROLADA
ELECTRICAL COMPONENT DEFECTS
Symptom
SC121 is displayed.
SC120 is displayed.
The CPU cannot detect the original size
properly. APS and ARE (Auto
Reduce/Enlarge) do not function
correctly.
The CPU cannot detect the original size
properly. APS and ARE do not function
correctly.
The CPU cannot detect the original size
properly. APS and ARE do not function
correctly.
The CPU cannot detect the original size
properly. APS and ARE do not function
correctly.
The CPU cannot detect the original size
properly. APS and ARE do not function
correctly.
The CPU cannot detect the original size
properly. APS and ARE do not function
correctly.
The machine quits auto process control
and goes to auto process control off
mode.
SC340 is displayed.
SC340 is displayed.
SC350 is displayed after copying.
SC350 is displayed after copying.
SC591 is displayed.
A toner bottle is detected in the upper
position even if there is no toner bottle
there.
The toner bottle in the upper position is
not detected.
A toner bottle is detected in the lower
position even if there is no toner bottle
there.
The toner bottle in the lower position is
not detected.
Normally, the machine works properly
because the current status of the toner
bottle cap is stored in the memory.
Normally, the machine works properly
because the current status of the toner
bottle cap is stored in the memory.
A294/A295