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FC-210/310 TROUBLESHOOTING 4 - 58 February 2002 © TOSHIBA TEC
[CF1] Color registration control abnormal
<Check of the status of color registration sensor error>
1. While pressing [0] and [5] simultaneously, turn the power ON.
2. Enter [461] with digital keys and press the [START] key.
3. The color registration control result is displayed in four values (Y(0), M(1), C(2), K(3)).
4. Check the value for Y(0) displayed in 3..
When [CF1] has occured, a value from 1 to 15 is displayed (normal if 0 or 16 or above).
1-14: Data error (color registration sensor is normal)
15: Reading error of color registration test pattern
<Disabling the color registration control>
5. While pressing [0] and [8] simultaneously, turn the power ON.
6. Enter [742] with digital keys and press the [START] key.
7. Set the color registration control setting to "1" (manual).
8. Enter [743] with digital keys and press the [START] key.
9. Set the color registration control during the warming-up to "0" (disabled).
10.Turn the power OFF.
<Check by the forced performing of color registration control >
11.While pressing [0] and [5] simultaneously, turn the power ON.
12.Enter [407] with digital keys and press the [START] key. ৎ (Forced performing of color
registration control)
* At this time, use a digital tester to monitor the test point TP91 (front color registration
sensor output) and TP93 (rear color registration sensor output) on the LGC board.
– If the outputs are normal –
Before starting the forced performing of color registration control, a voltage of approximately
0.7V DC is displayed.
After starting it, the voltage changes to approximately 4.4V DC, and this may drop
instantaneously down to 0.7V DC. (There may be no fluctuations in voltage, depending on the
reaction speed of the digital tester.)
When the forced performing of color registration control is finished, the voltage returns to
approximately 0.7V DC.