Canon LBP 2460 - B/W Laser Printer Service Manual page 259

Action: Inform the customer that the correct line voltage is not available at the outlet.
2. The power plug is not firmly plugged into the printer, the paper deck or the outlet.
Action: Push the power plugs in firmly.
3. A poor connection in the interface connector, power ON signal not being input.
Action: Reconnect the interface connector.
4. The power ON signal is not being output.
Action: Turn the printer power switch ON. Measure the voltage between jumper connectors
JP201-1 (PWRON-IN) and JP201-1 (GND) on the paper deck driver PCB. If the
value is not about 5V, replace the option controller PCB. If this does not rectify the
situation, replace the video controller PCB.
5. Blown fuse.
Action: Remove the power supply and replace the fuse.
6. The overcurrent/overvoltage detection circuit has been activated.
Action: If turning the power switch ON/OFF does not rectify the situation, investigate the
cause of the overcurrent/overvoltage detection circuit being activated. Be sure to
turn the power OFF for 2 minutes then turn it ON again.
7. Faulty power supply.
Action: Turn the printer power switch OFF and remove connector J203 from the paper deck
driver PCB. Plug the power cable into the power supply and turn the printer power
ON. Then measure the DC power supply through connector J203. While doing this
be careful not to short it. If the correct voltage is not being output, replace the
power supply.
8. Cable, DC load and paper deck driver PCB
Action: Turn OFF the printer power switch, and check the lines and DC loads from the paper
deck driver PCB. If there are no problems with either of them, replace the paper
deck driver PCB.
M-15 No DC Power Input
<Possible causes>
1. The AC power is not present.
Action: Make a check using the steps of M-13 "No AC Power Input (printer)".
2. The overcurrent/overvoltage detection circuit is active.
Action: If the problem is not rectified when the power switch is turned OFF and ON again,
find the cause of activation of the overcurrent/overvoltage detection circuit of the
power supply. Turn the power switch OFF for 2 minutes then turn it ON again.
3. The fuse has blown.
Action: Remove the power supply and replace the fuse.
4. The power supply is defective.
Action: Turn the power switch OFF and remove connector J204 from the DC controller
PCB. Plug the power cable and turn the power switch ON. Measure the DC power
CHAPTER 4
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