The error code buffer contains all detected errors since the last time
the buffer was erased. The buffer is written from left to right, new errors are
logged at the left side, and all other errors shift one position to the right. When an error occurs, it is added to the list
of errors, provided the list is not full. When an error occurs and the error
buffer is full, then the new error is not added, and the error buffer stays intact
(history is maintained). To prevent that
an occasional error stays in the list forever, the error is removed from the
list after more than 50 hrs. of operation. When multiple errors occur (errors occurred
within a short time span), there is a high probability that there is some
relation between them.
• If no errors are there, the LED should not blink at all in CSM or
SDM. No spacer must be displayed as well.
• There is a simple blinking LED procedure for board level repair (home
repair) so called LAYER 1 errors next to the existing errors which are LAYER 2
errors.
– LAYER 1 errors are one digit errors.
– LAYER 2 errors are 2 digit errors.
• In protection mode.
– From consumer mode: LAYER 1.
– From SDM mode: LAYER 2.
• Fatal errors, if I2C bus is blocked and the set reboots, CSM and SAM
are not selectable.
– From consumer mode: LAYER 1.
– From SDM mode: LAYER 2.
• In CSM mode.
– When entering CSM: error LAYER 1will be displayed by blinking LED.
Only the latest error is shown.
• In SDM mode.
– When SDM is entered via Remote Control code or the hardware pins,
LAYER 2is displayed via blinking LED.
• Error display on screen.
– In CSM no error codes are displayed on screen.
– In SAM the complete error list is shown.
Basically there are three kinds of errors:
• Errors detected by the Stand-by software which lead to protection.These
errors will always lead to protection and an automatic start of the blinking
LED LAYER 1 error.
• Errors detected by the Stand-by software which not lead to
protection.In this case the front LED should blink the involved error. Note that it can take up several minutes before
the TV starts blinking the error (e.g. LAYER 1 error = 2, LAYER 2 error = 15 or
53).
• Errors detected by main software (MIPS). In this case the error will
be logged into the error buffer and can be read out via ComPair, via blinking
LED method LAYER 1-2 error, or in case picture is visible, via SAM.
How to Read the Error Buffer
Use one of the following methods:
• On screen via the SAM (only when a picture is visible).
E.g.:
– 00 00 00 00 00: No errors detected
– 23 00 00 00 00: Error code 23 is the last and only detected error.
– 37 23 00 00 00: Error code 23 was first detected and error code 37 is
the last detected error.
– Note that no protection errors can be logged in the error buffer.
How to Clear the Error Buffer
Use one of the following methods:
• By activation of the “RESET ERROR BUFFER” command in the SAM menu.
• If the content of the error buffer has not changed for 50+ hours, it
resets automatically.
Error Buffer
In case of non-intermittent faults, clear the error buffer before starting
to repair (beforeclearing 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). There are several mechanisms of error detection:
• Via error bits in the status registers of ICs.
• Via polling on I/O pins going to the stand-by processor.
• Via sensing of analog values on the stand-by processor or the
PNX8550.
• Via a “not acknowledge” of an I2C communication.
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 onward, and then check if the front LED is blinking or if an
error is logged.
ERROR CODE TABLE
Click on the Table to Zoom In
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. It’s shown that the loggings which are
generated by the main software keep continuing. In this case diagnose has to be
done via compare.
Error 13 (I2C bus 3, SSB bus blocked). Current situation:
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 14 (I2C bus 2, TV set bus blocked). Current situation: 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 18 (I2C bus 4, Tuner bus blocked).
In case this bus is blocked,
short the “SDM” solder paths on the SSB during startup, LAYER error 2 = 18 will
be blinked.
• Error 15 (PNX8550 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 PNX8550 (supplies not OK, PNX 8550 completely dead, I2C link
between PNX and Stand-by Processor broken, etc...). When error 15 occurs it is also possible that
I2C1 bus is blocked (NVM). I2C1 can be indicated in the schematics as follows:
SCL-UP-MIPS, SDA-UP-MIPS. Other root causes for this error can be due to
hardware problems regarding the DDR’s and the bootscript reading from the
PNX8550.
• Error 16 (12V). This voltage is made in the power supplyand results
in protection (LAYER 1 error = 3) in case of absence. When SDM is activated we
see blinking LED LAYER 2 error = 16.
• Error 17 (Invertor or Display Supply). Here the status of the “Power
OK” is checked by software, no protection will occur during failure of the
invertor or display supply (no picture), only error logging. LED blinking of
LAYER 1 error = 3 in CSM, in SDM this gives LAYER 2 error = 17.
• Error 21 (PNX51X0). When there is no I2C communication towards the
PNX51X0 after start-up, LAYER 2 error = 21 will be logged and displayed via the
blinking LED
procedure if SDM is switched on. This device is located on the 200 Hz
panel from the display.
• Error 23 (HDMI). When there is no I2C communication towards the HDMI
mux after start-up, LAYER 2 error = 23 will be logged and displayed via the
blinking LED procedure if SDM is switched on.
• Error 24 (I2C switch). When there is no I2C communication towards the
I2C switch, LAYER 2 error = 24 will be logged and displayed via the blinking
LED procedure when SDM is switched on. Remark: this only works for TV sets with
an I2C controlled screen included.
• Error 28 (Channel dec DVB-S). When there is no I2C communication
towards the DVB-S channel decoder, LAYER 2 error = 28 will be logged and
displayed via the
blinking LED procedure if SDM is switched on.
• Error 31 (Lnb controller). When there is no I2C communication towards
this device, LAYER 2 error = 31 will be logged and displayed via the blinking
LED procedure if SDM is activated.
• Error 34 (Tuner). When there is no I2C communication towards the
tuner during start-up, LAYER 2 error = 34 will be logged and displayed via the
blinking LED procedure when SDM is switched on.
• Error 35 (main NVM). When there is no I2C communication towards the
main NVM during start-up, LAYER 2 error = 35 will be displayed via the blinking
LED
procedure when SDM is switched “on”. All service modes (CSM, SAM and
SDM) are accessible during this failure, observed in the Uart logging as
follows: "<< ERRO >>> PFPOW_.C: First Error (id19, Layer_1=
2 Layer_= 35)".
• Error 36 (Tuner DVB-S). When there is no I2C communication towards
the DVB-S tuner during start-up, LAYER 2 error = 36 will be logged and
displayed via the
blinking LED procedure when SDM is switched “on”.
• Error 42 (Temp sensor). Only applicable for TV sets equipped with
temperature devices.
• Error 53. This error will indicate that the PNX8550 has read his
bootscript (when this would have failed, error 15 would blink) but
initialization was never completed because 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 a few minutes before the TV starts blinking LAYER 1 error
= 2 or in SDM, LAYER 2 error = 53.
• Error 64. Only applicable for TV sets with an I2C controlled screen.
