Pioneer DEH-P710BT/XN/UC Service Manual page 28

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ROM CORRECTION information display
When information could be acquired from EEPROM.
A
: EEPROM Ver.Info
: CH use information (1:Use / 0:Not use Corresponds from the left to CH1, CH2, CH3, CH4)
When information couldn't be acquired from EEPROM.
B
$ $ $ $ $ $ $ $ $ : Error information
C
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:
There may be a problem with the communication.
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L 13942296513
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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NO_EEPROM (ROM CORRECTION is not connected)
ROM_ERROR (ROM CORRECTION data error)
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