Pioneer deh-p7200hd Service Manual page 30

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To all turning
A
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:
There may be a problem with the communication, or the display microcomputer may have an error.
B
To the display of version information
UNIT
: WW number
? ? ? ? : Unit number information of System microcomputer
C
& & & & : Unit number information of Display microcomputer
(When the Unit number is QWW3007, it is displayed as 3007.)
ROM CORRECTION information display
TE
When information couldn't be acquired from EEPROM.
L 13942296513
D
$ $ $ $ $ $ $ $ $ : Error information
NO_EEPROM (ROM CORRECTION is not connected)
ROM_ERROR (ROM CORRECTION data error)
When information could be acquired from EEPROM.
E
: EEPROM Ver.Info
: CH use information
(1:Use / 0:Not use Corresponds from the left to CH1, CH2, CH3, CH4)
If nothing is displayed on the screen:
There may be a problem with the communication, or the display microcomputer may have an error.
If a number apparently strange is displayed as the EEPROM version:
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There may be a problem with the communication.
If a version display is being made but the number of CH used is not displayed properly:
The connection with the EEPROM may be defective.
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