Tektronix 1235N - Phaser Color Laser Printer Service Manual page 79

Switch scans and the sensor and switches test
Switch or Switch scan test
sensor
Tray 1 No Paper Switch Scan 00
Sensor 1=
Tray 1 Low Paper Switch Scan 00
Sensor 2=
Cassette Switch Scan 00
Entrance 3=
Manual Bypass Switch Scan 00
Feeder Entrance/ 4=
Registration
sensor
Belt Entrance Switch Scan 01
1=
Exit Sensor Switch Scan 01
2=
Stack Full Sensor Switch Scan 01
3=
not used Switch Scan 01
4=
Black Toner Switch Scan 02
Cartridge Present 1=
Cyan Toner Switch Scan 02
Cartridge Present 2=
Magenta Toner Switch Scan 02
Cartridge Present 3=
Yellow Toner Switch Scan 02
Cartridge Present 4=
Top Cover Switch Switch Scan 03
1=
Front Cover Switch Scan 03
Switch 2=
Waste Toner Switch Scan 03
Sensor 3=
not used Switch Scan 03
4=
not used Switch Scan 04
not used Switch Scan 05
Manual Bypass Switch Scan 06
Feeder Home 1=
Sensor
Manual Bypass Switch Scan 06
Feeder Paper 2=
Empty Switch
Test result Details
L - Paper present Pull main tray out to test sensor
H - No paper
L - Paper level OK Pull main tray out to test sensor
H - Low paper
L - No paper Open front door and toggle sensor flag
H - Paper present behind feed rollers
L - No paper Open front door and push sheet of paper
H - Paper present into paper path leading to the transfer
unit
L - Paper present Open front door and push sheet of paper
H - No paper into paper path leading to the transfer
unit. Manually rotate the registration
roller (use the thumbwheel on the left
end of the roller) to feed the paper to the
transfer belt.
L - No paper Toggle sensor flag behind the fuser.
H - Paper present Remove the fuser if necessary
L - No paper Toggle the sensor flag at the exit bin
H - Stack full
not used
L - Deactuated Open top cover and actuate sensor flag
H - Unit installed next to LED head.
L - Deactuated Open top cover and actuate sensor flag
H - Unit installed next to LED head.
L - Deactuated Open top cover and actuate sensor flag
H - Unit installed next to LED head.
L - Deactuated Open top cover and actuate sensor flag
H - Unit installed next to LED head.
L - Top closed Open top cover
H - Top opened
L - Cover closed Open front cover
H - Cover opened
L - Not full Remove the drum unit caddy and the
H - Full transfer belt. Locate the sensor below
the registration rollers. Interrupt the
sensor with a scrap of paper
not used
not used
not used
L - Roller at home Open the top cover and remove the
H - Roller not drum unit caddy. Manually rotate the
home manual bypass feed roller by turning the
white gear on the right end of the roller.
L - Paper loaded Toggle the switch located at the
H - No Paper inner-base of the Manual Bypass Feeder
tray
Service Guide 65