Service Modes, Error Codes, and Fault Finding
EN 31Q522.2HE LA 5.
2010-Jun-30
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 analogue values on the stand-by processor
or the PNX85xx.
• Via a “not acknowledge” of an I
2
C communication.
Take notice that some errors need more than 90 seconds
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.
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 Stand-by Software Upgrade
). The loggings
which are generated by the main software keep continuing.
In this case (rebooting) diagnose has to be done via
ComPair.
• Error 3 (I
2
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 (e.g. read
out the NVM content). Instead of error “3” it is possible to
see error “2” in the error buffer.
• Error 5 (PNX85xx doesn’t boot). When this error occurs,
the TV main processor was not able to read his bootscript.
This error will point to a hardware problem around the
PNX85xx (supplies not OK, PNX 8535 completely dead,
I2C link between PNX and Stand-by Processor broken,
etc...). When error 5 occurs it is also possible that I2C2 bus
is blocked (NVM). I2C2 can be indicated in the schematics
as follows: SCLUP-MIPS, SDA-UP-MIPS, SCL-SLAVE,
SDA-SLAVE, SCL-2 or SDA-2.
• Error 5 (PNX85xx doesn’t boot). When this error occurs,
the TV main processor was not able to read his bootscript.
This error will point to a hardware problem around the
PNX85xx (supplies not OK, PNX 8535 completely dead,
I2C link between PNX and Stand-by Processor broken,
etc...). When error 5 occurs it is also possible that I2C2 bus
is blocked (NVM). I2C2 can be indicated in the schematics
as follows: SCLUP-MIPS, SDA-UP-MIPS, SCL-SLAVE,
SDA-SLAVE, SCL-2 or SDA-2.
• Error 6 (5V, 12V supply). When this error occurs, the TV
set shutdown in protection mode and follow with the Error
blinking.This error will point to a hardware problem around
the DC/DC (B02C) probably 5V supply is under voltage
cause the "PROT-DC" (B02C) line activated. Or another
possibility is the 12V supply under voltage cause the
"DETECT2" (B04A) line activated.
• Error 8 (1V2, 3V3 supply). When this error occurs, the TV
set shutdown in protection mode and follow with the Error
blinking. This error will point to a hardware problem around
the DC/DC +3V3-STANDBY_+1V2-STANDBY (B02B)
probably 1V2 STANDBY and 3V3 STANDBY under
voltage cause the "DETECT1" (B04A) line activated.
• Error 9 (Supply fault). When this error occurs, the TV set
shutdown in protection mode and follow with the Error
blinking. This error will point to a hardware problem around
the DC/DC 3V3_1V2 (B02A) probably the CLASS D
amplifier output cause the "SUPPLY FAULT" (B10A) line
activated.
• Error 23 (HDMI MUX). When this error occurs it means
that there is a problem with the I2C communication towards
the HDMI MUX IC AD8197. This error will point to a
hardware problem around the Digi IO HDMI MUX (B08C).
It is possible to see error "23" logged in the error buffer. The
best way for further diagnosis, is to use ComPair (e.g. read
out the NVM content).
• Error 26 (Master IF). When this error occurs it means that
there is a problem with the I2C communication towards the
MASTER IF TDA9898. it is probably will be no picture and
sound from tuner input. This error will point to a hardware
problem around the Main Tuner (B03A) IF processing IC. It
is possible to see error "26" logged in the error buffer.
• Error 34 (Tuner). When this error occurs it means that
there is a problem with the I2C communication towards the
Tuner 1716. There probably will be no picture and sound
from tuner input.
• This error will point to a hardware problem around the Main
Tuner (B03A). As a side effect of error 34, it is possible that
error 24 (no existing error) is also logged.
• Error 37 (Channel decoder). When this error occurs,
there probably will be no picture and sound from tuner
input. As a side effect of error 37 it is possible that error 4
(no existing error) is also logged.
• Error 53. This error will indicate that the PNX85xx has read
his bootscript (if this would have failed, error 5 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 up to 2 minutes before the TV
starts blinking error 53.
Error Description Error/
Prot
Detected
by
Device Result
3 I2C3 E MIPS PNX85xx Error logged.
5 PNX85xx does not
boot (HW cause)
E Stby P PNX85xx Error blinking.
6 5V, 12V supply P Stby P / Protection +
Error blinking.
8 1V2, 1V4, 2V5, 3V3
supply
P Stby P / Protection +
Error blinking.
9 Supply fault P Stby P / Protection +
Error blinking.
23 HDMI mux E MIPS AD8190/8191/
8197
Error logged.
26 Master IF E MIPS TDA9898/9897/
9890
Error logged.
34 Tuner E MIPS TD1716 Error logged.
37 Channel decoder E MIPS TDA10060/
TDA10048
Error logged.
53 PNX85xx does not
boot (SW cause)
E Stby P PNX85xx Error blinking.
75 iBoard E / / Error blinking
+ Error
logged.
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