Philips 13PT30L1 Service Manual page 38

EEPROM check-sum error
The last five errors, remembered in the EEPROM, are shown in the service menu. This is called the error buffer.
The error that is found last is displayed on the left, except when protection (1 to 3) is active.
Errors 1, 2, and 3 are often shown at the right of the error buffer display whenever they are detected.
Example 1:
Suppose the display shows: 8 – 11 – 2– 0 – 0
With 2 displayed at the right of the error buffer, high beam current protection is active.
Example 2:
Suppose the display shows: 11 – 4 – 5– 3 – 0
With 3 displayed at the right of the error buffer, vertical protection is active.
The following error codes have been defined:
Error Code Table
0 = No error
1 = X-Ray / overvoltage protection active
2 = High beam current (BCI) protection active
3 = Vertical protection active
4 = I²C error while communicating with the sound processor (IC 7803)
5 = Signal processor (IC 7250) start-up error
6 = I²C error while communicating with the signal processor IC (IC 7250)
7 = General I²C error *
8 = Internal RAM error micro controller
9 = EEPROM Configuration error (Checksum error)
10 = I²C error, EEPROM error
11 = I²C error, PLL tuner
Note: I²C = (SCL/SDA)
*
General I²C error means: no I²C device is responding to the particular I²C bus.
Possible causes: SCL short circuit to GND, SDA short circuit to GND, SCL short
circuit to SDA, SDA open circuit (at IC 7600), SCL open circuit (at IC 7600)