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Dear
The LSU error may be due to the failure of following
1- harness between lsu and main PBA.- repair/replace the harness.
2-lsu itself-clean optical path inside lsu with dry lintfree cotton cloth.
3-Main PBA- replace the main board.
E7/03 is a lsu error. The LSU is the “printer head” of the printer. But instead of
emitting ink, the LSU emits a laser beam, directing it at the
drum of the toner cartridge. If replacing the lsu does not fix it it may be the mcu pwb, but most likely the LSU.
LSU stands for Laser Scanner Unit ... you normally get 2 different kind of errors with LSU ...
LSU Hsync or LSU Motor Error ...
If you get this error, it means that the Laser Scanner Unit has gone bad and the only way to get it fixed is to get the printer repaired ...
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