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November 2003 © TOSHIBA TEC 5 - 41 e-STUDIO3511/4511 TROUBLESHOOTING
5.1.8 Drive system related service call
[C010] Main motor abnormality
Is the main motor working? (Perform the output check: 03-101/151)
NO 1. Check if the connector J581 of the main motor is disconnected.
2. Check if the connector CN347 on the LGC board is disconnected.
3. Check if the connector pins are disconnected or the harnesses are open
circuited.
4. Check if the conductor patterns on the main motor board and LGC board are
short circuited or open circuited.
5. Replace the main motor.
6. Replace the LGC board.
YES
1. Check if the PLL lock signal CN347-8 pin output from the LGC board is always level “L”.
2. Check if the voltage supplied to the ASIC input terminal IC38-152 pin is always “L”.
3. Replace the LGC board.
[C020] Developer motor abnormality
Is the developer unit motor working? (Perform the output check: 03-112/162)
NO 1. Check if the connector J578 of the developer motor is disconnected.
2. Check if the connector CN348 on the LGC board is disconnected.
3. Check if the connector pins are disconnected or the harnesses are open
circuited.
4. Check if the conductor patterns on the developer motor board and LGC board
are short circuited or open circuited.
5. Replace the developer motor.
6. Replace the LGC board.
YES
1. Check if the PLL lock signal CN348-B6 pin output from the LGC board is always level “L”.
2. Check if the voltage supplied to the ASIC input terminal IC38-150 pin is always “L”.
3. Replace the LGC board.
[C030] Transport motor abnormality
Is the transport motor working? (Perform the output check: 03-123/173)
NO 1. Check if the connector J582 of the transport motor is disconnected.
2. Check if the connector CN348 on the LGC board is disconnected.
3. Check if the connector pins are disconnected or the harnesses are open
circuited.
4. Check if the conductor patterns on the transport motor board and LGC board
are short circuited or open circuited.
5. Replace the transport motor.
6. Replace the LGC board.
YES
1. Check if the PLL lock signal CN348-A7 pin output from the LGC board is always level “L”.
2. Check if the voltage supplied to the ASIC input terminal IC38-149 pin is always “L”.
3. Replace the LGC board.