Actions Yes No
Step 7
Damage to the printer is possible. Be careful to touch only one conductor
at a time. Rest the probe against the connector to steady it.
With the printer on, verify the following values at JLVPS1:
Pin 1: +5 V dc
Pin 2: Ground
Pin 3: +5 V dc
Pin 4: Ground
Pin 5: +5 V dc
Pin 6: Ground
Pin 7: +24 V dc
Pin 8: Ground
Pin 9: +24 V dc
Pin 10: Ground
Pin 11: +24 V dc
Pin 12: Ground
Pin 16: Ground
Are the values approximately correct?
Replace the controller
board. See
“Controller
board removal” on
page 291.
Replace the LVPS. See
“Low‑voltage power
supply (LVPS)
assembly removal” on
page 226.
Front door sensor or switches service check
Actions Yes No
Step 1
Enter Diagnostics Menu.
For CS310 models, turn the printer off, press and hold Down and Right,
turn the printer on, and then release the buttons when the installed
memory and processor speed displays.
For CS410 and CS510 models, turn the printer off, press and hold 3 and
6, turn the printer on, and then release the buttons when the installed
memory and processor speed displays.
Perform the Base Sensor Test. See
“BASE SENSOR TEST” on page 176.
a Select Base Sensor Test, and press Select.
b Select Front Door, and press Select.
c Open and close the front door, and observe the display.
Does the display indicate Value Closed with the door closed, and
Value Opened with the door open?
Sensor, toner door, and
right doors are okay.
Go to step 2.
5027
Diagnostic information
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