Philips Q543.1E LA Service Manual page 24

EN 24 5. Q543.1E LA
Extra Information
• Rebooting. When a TV is constantly rebooting due to
internal problems, most of the time no errors will be logged
or blinked. This rebooting can be recognized via a ComPair
interface and Hyperterminal (for Hyperterminal settings,
see section 5.8.6 UART
loggings which are generated by the main software keep
continuing. In this case diagnose has to be done via
ComPair.
• Main NVM. When there is no I
the main NVM, LAYER 1 error = "2" will be displayed via
the blinking LED procedure. In SDM, LAYER 2 error can be
"19". Check the logging for keywords like "I
2
• Error 13 (I C bus 3 blocked). When this error occurs, the
TV will constantly reboot due to the blocked bus. The best
way for further diagnosis here, is to use ComPair.
• Error 15 (PNX8543 doesn't boot). Indicates that the main
processor was not able to read his bootscript. This error will
point to a hardware problem around the PNX8543
(supplies not OK, PNX 8541 completely dead, I
between PNX and Stand-by Processor broken, etc...).
When error 15 occurs it is also possible that I
2
blocked (NVM). I C2 can be indicated in the schematics as
follows: SCL-UP-MIPS, SDA-UP-MIPS, SCL-2 or SDA-2.
Other root causes for this error can be due to hardware
problems with: NVM PNX5120, PNX5120 itself, or DDRs.
• Error 16 (12V). This voltage is made in the power supply
and results in protection (LAYER 1 error = "3"). When SDM
is activated we see blinking LED LAYER 2 error = "16".
• Error 17 (POK). The display is switched "on" with the
signal "Lamp On". If the inverter starts (or 24V display is
OK) the POK line becomes "high". If the POK line is not
"high", the set backlight will be switched "off" and "on" again
for 3 times (start-up). If the set POK line becomes "high"
after the retries, no error is logged; if the POK stays "low",
error is logged: LAYER 1 error = "3", LAYER 2 error = "17".
No protection is required, the start-up goes on.
• Error 18 (1V2-3V3-5V too low). All these supplies are
generated by the DC/DC supply on the SSB. If one of these
supplies is too low, protection occurs and blinking LED
LAYER 1 error = "2" will be displayed automatically. In
SDM this gives LAYER 2 error = "18".
• Error 21 (PNX5120). When there is no I
towards the PNX5120 after start-up (power "off" by
disconnection of the mains cord), LAYER 2 error will blink
continuously via the blinking LED procedure in SDM. (start-
up the TV with the solder paths short to activate SDM).
• Error 23 (HDMI). When there is no I
towards the HDMI multiplexer after start up, LAYER 2
error = "23" will be logged and displayed via the blinking
LED procedure if SDM is switched "on".
• Error 25 (Boot-NVM PNX5120). When there is no I
communication towards the PNX5120 NVM after start-up,
TV is rebooting endlessly with blinking LAYER 1 error = 2
(shown every minute). When SDM is activated we see
blinking LED LAYER 2 error = "25".
• Error 27 (Multi Standard demodulator). When there is no
2
I C communication towards the Multi Standard
demodulator after start up, LAYER 2 error = "27" will be
logged and displayed via the blinking LED procedure when
SDM is switched "on".
• Error 28 (FPGA ambilight). When there is no I
communication towards the FPGA ambilight after start up,
LAYER 2 error = "28" will be logged and displayed via the
blinking LED procedure if SDM is switched "on". Note that
it can take up several minutes before the TV starts blinking
LAYER 1 error = "2" in CSM or in SDM, LAYER 2
error = "28".
• Error 34 (Tuner). When there is no I
towards the tuner after start up, LAYER 2 error = "34" will
be logged and displayed via the blinking LED procedure
when SDM is switched on.
• Error 53. This error will indicate that the PNX8543 has
read his bootscript (when this would have failed, error 15
would blink) but initialization was never completed because
2009-Mar-27
Service Modes, Error Codes, and Fault Finding
Logging). It's shown that the
2
C communication towards
2
C bus blocked".
2
C link
2
C2 bus is
2
C communication
2
C communication
2
C
2
C
2
C communication
of hardware problems (NAND flash,...) or software
initialization problems. Possible cause could be that there
is no valid software loaded (try to upgrade to the latest main
software version). Note that it can take up to 2 minutes
before the TV starts blinking LAYER 1 error = "2" or in
SDM, LAYER 2 error = "53".
5.6 The Blinking LED Procedure
5.6.1 Introduction
The blinking LED procedure can be split up into two situations:
• Blinking LED procedure LAYER 1 error. In this case the
error is automatically blinked when the TV is put in CSM.
This will be only one digit error, namely the one that is
referring to the defective board (see table
overview (multi chassis
of the TV. This approach will especially be used for home
repair and call centres. The aim here is to have service
diagnosis from a distance.
• Blinking LED procedure LAYER 2 error. Via this procedure,
the contents of the error buffer can be made visible via the
front LED. In this case the error contains 2 digits (see table
5-3 Error code overview (multi chassis
be displayed when SDM (hardware pins) is activated. This
is especially useful for fault finding and gives more details
regarding the failure of the defective board.
Important remark:
For all errors detected by MIPS which are fatal (rebooting
of the TV set, with reboot starts after LAYER 1 error
blinking), one should short the SDM solder paths at start-
up from the power OFF state by mains interruption and not
via the power button, to trigger the SDM via the hardware
pins.
When one of the blinking LED procedures is activated, the front
LED will show (blink) the contents of the error-buffer. Error
codes greater then 10 are shown as follows:
1. "n" long blinks (where "n" = 1 to 9) indicating decimal digit
2. A pause of 1.5 s
3. "n" short blinks (where "n"= 1 to 9)
4. A pause of approximately 3 s,
5. When all the error codes are displayed, the sequence
finishes with a LED blink of 3 s
6. The sequence starts again.
Example: Error 12 8 6 0 0.
After activation of the SDM, the front LED will show:
1. One long blink of 750 ms (which is an indication of the
decimal digit) followed by a pause of 1.5 s
2. Two short blinks of 250 ms followed by a pause of 3 s
3. Eight short blinks followed by a pause of 3 s
4. Six short blinks followed by a pause of 3 s
5. One long blink of 3 s to finish the sequence
6. The sequence starts again.
5.6.2 How to Activate
Use one of the following methods:
• Activate the CSM. The blinking front LED will show only
the latest layer 1 error, this works in "normal operation"
mode or automatically when the error/protection is
monitored by the stand-by processor. At the time of this
release, this layer 1 error blinking was not working as
expected.
In case no picture is shown and there is no LED blinking,
read the logging to detect whether "error devices" are
mentioned. (see section
• Activate the SDM. The blinking front LED will show the
entire contents of the layer 2 error buffer, this works in
"normal operation" mode or when SDM (via hardware pins)
is activated when the tv set is in protection.
5-3 Error code
overview)) which causes the failure
overview)) and will
5.8.6 UART Logging).