5-5
PL9.1SM
3
Error Codes
3.1
Introduction
Error codes are required to indicate failures in the TV set. In
principle a unique error code is available for every:
•
Activated protection.
•
Failing I2C device.
•
General I2C error.
•
SDRAM failure.
The last five errors, stored in the NVM, are shown in the
Service menu’s. This is called the error buffer.
The error code buffer contains all errors detected since the last
time the buffer was erased. Th e buffer is written from left to
right. When an error occurs that is not yet in the error code
buffer, it is displayed at the left side and all other errors shift one
position to the right.
An error will be added to the buffer if this error differs from any
error in the buffer. The last found error is displayed on the left.
An error with a designated error code may never lead to a
deadlock situation. This means that it must always be
diagnosable (e.g. error buffer via OSD or blinking LED
procedure, ComPair to read from the NVM).
In case a failure identified by an error code automatically
results in other error codes (cause and effect), only the error
code of the MAIN failure is displayed.
Example: In case of a failure of the I2C bus (CAUSE), the error
code for a “General I2C failure” and “Protection errors” is
displayed. The error codes for the single devices (EFFECT) is
not displayed. All error codes ar e stored in the same error
buffer (TV’s NVM) except when the NVM itself is defective.
3.2
How to Read the Error Buffer
You ca n read the error buffer in 3 ways:
•
On screen via the SAM/SDM/CSM (if you have a picture).
Example:
–
ERROR: 0 0 0 0 0 : No errors detected
–
ERROR: 6 0 0 0 0 : Error code 6 is the last and only
detected error
–
ERROR: 9 6 0 0 0 : Error code 6 was detected first and
error code 9 is the last detected (newest) error
•
Via the blinking LED procedure (when you have no
picture). See “The Bl inking LED Procedure”.
•
Via ComPair.
