Canon S820MG, Service Manual

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Part 2: Troubleshooting
S900/ S820/ S750/ S520
Orange / 6300 RAM error <Cause>
Green DRAM check error (at hard power ON).
S750/S520 S900/S820 display the error at soft power ON.
11 toggle blinks <Suspect Part> Logic board.
S900/S820
Internal error
No indication ... Ink sensor error <Cause> The no-ink indication is given while
there is still ink. External noise (light) has
affected the ink sensor.
<Suspect Part> Logic board, ink sensor, ink
tanks.
✽
1 : S900 only.
✽
2 : S750 only.
✽
3 : S900/S820 only.
Orange /
Green
S900/S820
12 toggle blinks 6500 error <Cause> When the CPU malfunctions due to
an unknown cause, the CPU makes illegal
access and runs aberrantly, resulting in a
hardware error. In this case, as the printer
cannot continue operations, the printer is
powered off. When the printer is powered on
the next time, the error is displayed.
Eg. One cause of this error may be the head
error.
820D/S830
403 error <Cause> When the communication between
the engine ROM and Photo Direct Printing
ROM are not properly conducted, this error will
occur. Test the logic board.