Question about Sharp AR-507 Copier
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.
Posted on May 11, 2010
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Posted on Jan 02, 2017
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AMI BIOS beep codes
Below are the AMI BIOS Beep codes that can occur. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary.
Beep Code Descriptions Document
1 short DRAM refresh failure CH000996
2 short Parity circuit failure CH000607
3 short Base 64K RAM failure CH000996
4 short System timer failure CH000607
5 short Process failure CH000607
6 short Keyboard controller Gate A20 error CH000383
7 short Virtual mode exception error CH000607
8 short Display memory Read/Write test failure CH000607
9 short ROM BIOS checksum failure CH000607
10 short CMOS shutdown Read/Write error CH000239
11 short Cache Memory error CH000607
1 long, 3 short Conventional/Extended memory failure CH000996
1 long, 8 short Display/Retrace test failed CH000607
For more information go to: http://www.computerhope.com/beep.htm#04
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