Toshiba e-studio550 Service Manual page 274

16. 7. Errors
Errors can be divided into the sensor adjustment error, EEPROM error and tray lift motor error.
(1) Sensor adjustment error
There are 4 kinds of sensor adjustment errors:
1) Original length sensor adjustment error
2) Read sensor adjustment error
3) Large original exit sensor adjustment error
4) Small original reverse sensor adjustment error
The D/A output voltage is adjusted so that the A/D input voltage for each sensor is kept within the
range between 3.16V~3.55V while carrying out the EEPROM initialization and all-sensor adjust
ment at the adjustment mode. At this time, the sensor adjustment error occurs when the D/A output
voltage cannot be adjusted within the range between 0.04V~2.90V.
(2) EEPROM error
The EEPROM error occurs when the initialization value cannot be written on the EEPROM while
carrying out the EEPROM initialization and all-sensor adjustment at the adjustment mode or when
data cannot be read out from the EEPROM after turning ON the power.
(3) Tray lift motor error
The tray lift motor error occurs when a feeding jam because of which the upper limit/lower limit
cannot be detected within a specified time while lifting/lowering the tray takes place 3 times
continuously.
JUNE 2002 © TOSHIBA TEC 16 - 37 e-STUDIO550/650/810 RADF