Error Buffer - Philips 13PT30L1 Service Manual

10. To exit the Service Default Mode and erase the error codes, turn the unit off with the Power button on the
remote control, then unplug the ac cord.
11. To exit the Service Default Mode and save the error codes, unplug the ac cord to turn off the set. When the
set is turned on again, the Service Default Mode will still be active.
Explanation of Display:
Run Timer
The run timer counts the normal operation hours, not the standby hours. The actual value of the run timer is
displayed in SDM and CSM. The run timer displays hours in hexadecimal format. This display will increment
based on the amount of time the set has been on. The timer will also be incremented one hour each time the set
is turned on.
Software Identification, Cluster, and Version
The software identification, cluster, and version will be shown in the service main menu display.
These numbers consist of the last part of the customer identification printed on the IC package; the screen will
show "AAABBC-X.Y". (Example: L90US1 1.2)
AAA is the engineering project name (Ex: L90 = L9.0).
BB is a function specification indicating specific functionality or a region (Ex: US). Processors with the same
engineering project name and function name are interchangeable, except for the languages they support.
C is the language cluster number within the "BB" software version (Ex: 1 = English/Spanish/French)
X is the main version number (Ex: 1)
Y is the sub version number (Ex: 2)
the main version number is updated with a major change of specification (incompatible with the previous
software version)
the sub version number is updated with a minor change (backwards compatible with the previous versions)
if the main version number changes, the new version number is written in the EEPROM
if the main version number changes, the default settings are loaded
if the sub version number changes, the new version number is written in the EEPROM
if the EEPROM is fresh, the software identification, version and cluster will be written to EEPROM
Note: a new micro controller is considered to be compatible if it works instead of the old software and the
functionality is not significantly changed.

Error Buffer

Error codes are required to indicate failures in the television. For intermittent complaints, always check the error
buffer. A unique error code is available for:
activated protection (error codes 1, 2, and 3)
failing I 2 C device
general I 2 C error
RAM failure (e.g. internal RAM of microprocessor (IC 7600) )
Other error codes are:
Signal processor (IC 7250) start-up error