Pioneer DEX-P99RS/UC Service Manual page 32

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All lights on 3 7 63 1515 0
A
*) The screen saver is invalid.
If a noise is observed on the screen:
The display microcomputer may have an error, or the connection between the display microcomputer and the
OEL driver may have a problem.
If nothing is displayed on the screen:
B
There may be a problem with the communication, or the display microcomputer may have an error.
All lights off
C
*) The screen saver is invalid.
If a noise is observed on the screen:
The display microcomputer may have an error, or the connection between the display microcomputer and the
OEL driver may have a problem.
TE
L 13942296513
Bus connection verification mode
D
: OK or NG
If nothing is displayed on the screen:
There may be a problem with the communication, or the display microcomputer may have an error.
If NG is displayed somewhere:
The connection between the display microcomputer and the image ROM may be defective. For example, even
if NG is displayed for the data bus, it is not necessarily a data bus connection defective.
A problem with the address bus may also cause an error during data bus check.
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