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.
– 3723 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.