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February 2002 © TOSHIBA TEC 4 - 61 FC-210/310 TROUBLESHOOTING
<Check by the gradation pattern>
16.While pressing [0] and [5] simultaneously, turn the power ON.
17.Enter "4" with digital key and press the [PRINTER/NETWORK] key.
18.Check the output gradation images for gamma adjustment if there is any abnormality in the
gradation of yellow, magenta, cyan and black.
– If there are any abnormalities –
(1) Check if the photoconductive drum and transfer belt are operating. If not, correct any
mechanical problems.
(2) Check if the transfer belt unit is raised fully upward.
(3) Check if the transfer/transport unit is inserted securely.
(4) Check the surface of the transfer belt for any abnormal stain, large flaw or break.
(5) Check if the connector of the transfer transformer is disconnected.
(6) Check if any of the high-voltage harnesses of the main high-voltage transformer/
transfer transformer is disconnected.
(7) Check the harness between the LGC board and the transfer transformer if it is open-
circuited.
(8) Check the high-voltage contacts of the transfer belt unit if they are contacting properly
or if they are not dirty.
(9) Check if any of the high-voltage harnesses is disconnected.
(10) Check if the connector J113, J114 or J119 on the LGC board is disconnected.
(11) Check if the connector J181, J182, J185 or J188 on the IMC board is disconnected.
(12) Check if the harness between the LGC board and the color registration sensor is
open-circuited.
(13) Check if the color registration sensor connector is disconnected.
(14) Check if any of the main high-voltage transformer connectors is disconnected.
(15) Check if any of the harnesses between the LGC board and the main high-voltage
transformers is open-circuited.
(16) Replace the transfer transformer.
(17) Replace the main high-voltage transformer.
19. Check the sensor detection area of the transfer belt for any damage, and if damaged, replace
the transfer belt.
20. Check the emitting/receiving area of the color registration sensor if it is not dirty.
* Be sure to do the following after having made checks and corrections:
1. While pressing [0] and [8] simultaneously, turn ON the power.
2. Enter [742] with digital keys and press the [START] key.
3. Set the color registration control setting to "0" (automatic).
4. Enter [743] with digital keys and press the [START] key.
5. Set the color registration control during warming-up setting to "1" (enabled).
6. Turn OFF the power.