Toshiba e-STUDIO657 - 8.5.6 COVER OPEN continues to be displayed

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ERROR CODE AND TROUBLESHOOTING
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(6) [G] Reset "FUNCTION LIST FOR MAINTENANCE"
(7) [H] Reset "FUNCTION" list
4. Adjust image quality
(8) [I] Adjust image quality
8.5.6 "COVER OPEN" continues to be displayed
Check item Measures
Front cover (Upper) • Confirm that both the front cover (upper) is closed.
• Confirm that the front cover switch (SW7) is turned ON properly when
the front cover (upper) is closed.
• Confirm that the Toner motor interlock switch (SW11) is turned ON
properly when the front cover (upper) is closed.
Front cover (Lower) • Confirm that both the front cover (lower) is closed.
• Confirm that the cover interlock switch (SW8) is turned ON properly
when the front cover (lower) is closed.
• Confirm that the IH interlock switch (SW9) is turned ON properly when
the front cover (lower) is closed.
Left lower cover (Exit cover) • Confirm that both the left lower cover (Exit cover) is closed.
• Confirm that the exit cover switch (SW5) is turned ON properly when
the left lower cover (Exit cover) is closed
• Confirm that the cover interlock switch (SW8) is turned ON properly
when the left lower cover (Exit cover) is closed
• Confirm that the IH interlock switch (SW9) is turned ON properly when
the left lower cover (Exit cover) is closed
LGC board Replace the LGC board.
Switching power supply Replace the Switching power supply.
Replace parts Remarks
LGC board
Switching power supply