Frontier LP7500 Service Manual page 285

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No.
4 OK/No Good G Laser Light Source Status
The laser light intensity depends on the electric current applied to the laser diode. When the laser diode is being deteriorated, add
the electric current to acquire the specified amount of output. No Good is displayed when the current value exceeds the
limitation.
5 ##.#C R Laser Thermosensor
6 ##.#C Laser Unit Thermosensor
7 ##### Polygon Mirror Frequency
8 ON/OFF G Laser Judgment Signal 1
9 ON/OFF G Laser Judgment Signal 2
*1. Even though the laser unit is in normal condition, it may take five minutes or more for the Laser Synchronous Sensor to turn from
Asynchronous to Synchronous.
! ! ! ! Paper Advance Section 1
No.
1 DARK/LIGHT Paper Sensor 1
2 DARK/LIGHT Lane Select Sensor (Left)
3 DARK/LIGHT Lane Select Sensor (Right)
4 DARK/LIGHT Arm Sensor (Left)
5 DARK/LIGHT Arm Sensor (Right)
6 DARK/LIGHT Paper Sensor 2 (Left)
7 DARK/LIGHT Paper Sensor 2 (Center)
8 DARK/LIGHT Paper Sensor 2 (Right)
9 ON/OFF Interlock Switch (Printer Top Cover)
10 ON/OFF Interlock Switch (Printer Doors 1, 4)
11 ON/OFF Interlock Switch (Printer Door 2)
12 ON/OFF Printer Door 3 Sensor
*1. Printer door 4 is shown only when the Quad Magazine Unit has been registered to Option Registration.
! ! ! ! Paper Advance Section 2
No.
1 ON/OFF DIP Switch 3-1
2 ON/OFF DIP Switch 3-2
3 ON/OFF DIP Switch 3-3
4 ON/OFF DIP Switch 3-4
6 DARK/LIGHT Pressure Guide Sensor
7 DARK/LIGHT Paper Advance Pressure Change Sensor (Left)
8 DARK/LIGHT Paper Advance Pressure Change Sensor (Right)
9 ON/OFF DIP Switch 4-1
10 ON/OFF DIP Switch 4-2
11 ON/OFF DIP Switch 4-3
12 ON/OFF DIP Switch 4-4
35210
Display
Display
*1
Display
35210
Status
OK The laser and G laser driver are normal.
No The laser unit is deteriorated.
Good The G laser driver is not connected correctly, or is
damaged.
Displays the R laser temperature.
Displays the temperature of the laser unit.
2043±7 When the polygon mirror rotates properly
- The polygon mirror does not normally rotate.
OFF The combination of ON/OFF identifies the laser
unit type.
OFF
For details, see Exposure Engine Section
(Details).
Status
DARK Paper is detected.
DARK When the arm is detected.
DARK When the arm is detected.
DARK When the arm is detected.
DARK When the arm is detected.
DARK Paper is detected.
DARK Paper is detected.
DARK Paper is detected.
See Operation of the interlock switches.
Status
OFF Displays the dip switch status of the printer control
PCB. 66000
OFF
Turn off all.
OFF
OFF
DARK When the paper pressure is released.
DARK When the pressure is applied on the paper.
DARK When the pressure is applied on the paper.
OFF Displays the dip switch status of the printer control
PCB. 66000
OFF
Turn off all.
OFF
OFF
Maintenance
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