Canon S520 Service Manual page 50

Part 2: Troubleshooting
Orange / 6300 RAM error
Green
S750/S520
11 toggle blinks
S900/S820
Internal error
No indication ...
✽ 1 : S900 only.
✽2 : S750 only.
✽3 : S900/S820 only.
<Cause>
DRAM check error (at hard power ON).
S900/S820 display the error at soft power ON.
<Suspect Part> Logic board.
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.
2-12
S900 / S820 / S750 / S520