Toner Meter Cycle (Tmc) Card; Toner Sensors (Y, C, M, K) On Tmc Card - Olivetti d-Color MF920 Service Manual

Toner meter cycle (TMC) card

Step Questions / actions
1 Perform the Base Sensor Test:
1. Enter Diagnostics menu (turn off the
printer, press and hold
turn on the printer, and release the buttons
when the installed memory and processor
speed displays).
2. Select Base Sensor Test, and press
Select (
3. Select the sensor you want to test, open
the toner door, remove the corresponding
toner cartridge, and press Select (
4. Note whether the operator panel shows a
change in state.
Note: If the reflective disk is not showing
on the cartridge, rotate the gear clockwise
to expose the reflective surface.
For additional information about the Base
Sensor Test, see
page 3-18.
Does the operator panel display a change of
state?

Toner sensors (Y, C, M, K) on TMC card

Step Questions / actions
1 Remove the toner cartridge, and inspect the
lenses on the toner meter cycle (TMC) card.
Are the lenses blocked, damaged, or dirty?
2 Turn off the printer, and remove the rear
shield. See "Rear shield removal" on
page 4-7. Disconnect the cable at the JSP1
connector on the controller board. Turn the
printer on, and measure the voltages below:
Are any of the voltage values incorrect?
2-58
Service Manual
and Select (
).
"Base Sensor Test" on
JSP1
Pin Voltage
1 Ground
2 +3.3 V dc
3 +3.3 V dc
4 +3.3 V dc
5 +3.3 V dc
6 +0.0 V dc
Yes
Replace the toner cartridge.
),
).
Yes
Repair or replace the TMC
card. See "Toner meter
cycle (TMC) card removal"
on page 4-61.
Replace the controller
board. See "Controller
board removal" on
page 4-18.
No
Replace the toner meter
cycle (TMC) card. See
"Toner meter cycle (TMC)
card removal" on
page 4-61.
No
Go to step 2.
Replace the TMC card. See
"Toner meter cycle (TMC)
card removal" on
page 4-61.
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