Philips Picasso 32PFL3805D/78 Service Manual page 21

5.4.4 Error Buffer
In case of non-intermittent faults, clear the error buffer before
starting to repair (before clearing the buffer, write down the
content, as this history can give significant information). This to
ensure that old error codes are no longer present.
If possible, check the entire contents of the error buffer. In
some situations, an error code is only the result of another error
code and not the actual cause (e.g. a fault in the protection
detection circuitry can also lead to a protection).
Take notice that some errors need several minutes before they
start blinking or before they will be logged. So in case of
problems wait 2 minutes from start-up onwards, and then
check if the front LED is blinking or if an error is logged.
Table 5-3 Error code overview
Description
I2C Bus related:
2
I C bus blocked (front-end)
2
I C1 bus blocked
2
I C0 bus blocked
System does not boot
2
I C2 bus blocked (EDID HDMI)
Supply related:
DC on speaker
POK (inverter or display supply)
IC related:
HDMI MUX
HDMI EDID
ARM (Ambilight)
Tuner (Frontend)
Main NVM
5.5 The Blinking LED Procedure
5.5.1 Introduction
The software is capable of identifying different kinds of errors.
Because it is possible that more than one error can occur over
time, an error buffer is available, which is capable of storing the
last five errors that occurred. This is useful if the OSD is not
working properly.
Errors can also be displayed by the blinking LED procedure.
The method is to repeatedly let the front LED pulse with as
many pulses as the error code number, followed by a period of
1.5 seconds in which the LED is "off". Then this sequence is
repeated.
Example (1): error code 4 will result in four times the sequence
LED "on" for 0.25 seconds / LED "off" for 0.25 seconds. After
this sequence, the LED will be "off" for 1.5 seconds. Any RC5
command terminates the sequence. Error code LED blinking is
in red color.
Example (2): the content of the error buffer is "12 9 6 0 0"
After entering SDM, the following occurs:
• 1 long blink of 5 seconds to start the sequence,
• 12 short blinks followed by a pause of 1.5 seconds,
• 9 short blinks followed by a pause of 1.5 seconds,
• 6 short blinks followed by a pause of 1.5 seconds,
• 1 long blink of 1.5 seconds to finish the sequence,
• The sequence starts again with 12 short blinks.
5.5.2 Displaying the Entire Error Buffer
Additionally, the entire error buffer is displayed when Service
Mode "SDM" is entered. In case the TV set is in protection or
Stand-by: The blinking LED procedure sequence (as in SDM-
mode in normal operation) must be triggered by the following
RC sequence: "MUTE" "062500" "OK".
Service Modes, Error Codes, and Fault Finding
Layer 1 Layer 2 Monitored
by
2 12 ARM
2 13 ARM
2 14 ARM
2 15 ARM/Stby µP
2 18 ARM
2 11 ARM
3 17 ADC
2 23 ARM
2 24 ARM
8 28 ARM
2 34 ARM
2 35 ARM
Table 5-2 Layer 1 error codes
Description
SSB
Display supply
Platform supply
Ambilight
Error/ Error Buffer/ Device
Prot Blinking LED
E BL/EB SSB
E BL/EB SSB
E BL SSB
P BL SSB
E BL/EB SSB
P BL /
E EB /
E EB ADV3002
E EB M24C02-WMN6
E EB NXP LPC2103
E EB VA1G5BF8010
E / M24C64
In order to avoid confusion with RC5 signal reception blinking,
this blinking procedure is terminated when a RC5 command is
received.
LC9.3L LA 5.
Layer 1 code Remarks
2
3 If only one supply is used
4 No separate supply
8
Defective Board
SSB
SSB
SSB
SSB
SSB
SSB
Supply
SSB
SSB
AL-module or DC/DC
SSB
SSB
EN 21
2010-Jul-01