Service Modes, Error Codes, and Fault Finding
5.
900 kHz for 12 V to 3.3 V and 12 V to 5 V DC-DC
converters. The DVB-S2 supply 24 V to 5 V and 24 V to +V
LNB DC-DC converters operates at 300 kHz while for 5 V
to 1.1 V DC-DC converter 900 kHz is used.
5.8.6
Exit “Factory Mode”
When an “F” is displayed in the screen’s right corner, this
means the set is in “Factory” mode, and it normally
happens after a new SSB is mounted. To exit this mode, push
the “VOLUME minus” button on the TV’s local keyboard for 10
seconds (this disables the continuous mode).
Then push the “SOURCE” button for 10 seconds until the “F”
disappears from the screen.
5.8.7
Logging
When something is wrong with the TV set (f.i. the set is
rebooting) you can check for more information via the logging
in Hyperterminal. The Hyperterminal is available in every
Windows application via Programs, Accessories,
Communications, Hyperterminal. Connect a “ComPair UART”-
cable (3138 188 75051) from the service connector in the TV to
the “multi function” jack at the front of ComPair II box.
Required settings in ComPair before starting to log:
- Start up the ComPair application.
- Select the correct database (open file “Q55X.X”, this will set
the ComPair interface in the appropriate mode).
- Close ComPair
After start-up of the Hyperterminal, fill in a name (f.i. “logging”)
in the “Connection Description” box, then apply the following
settings:
1.
COMx
2.
Bits per second = 115200
3.
Data bits = 8
4.
Parity = none
5.
Stop bits = 1
6.
Flow control = none
During the start-up of the TV set, the logging will be displayed.
This is also the case during rebooting of the TV set (the same
logging appears time after time). Also available in the logging
is the “Display Option Code” (useful when there is no picture),
look for item “DisplayRawNumber” in the beginning of the
logging. Tip: when there is no picture available during rebooting
you are able to check for “error devices” in the logging (LAYER
2 error) which can be very helpful to determine the failure cause
of the reboot. For protection state, there is no logging.
5.8.8
Guidelines Uart logging
Description possible cases:
Uart loggings are displayed:
•
When Uart loggings are coming out, the first conclusion we
can make is that the TV set is starting up and
communication with the flash RAM seems to be supported.
The PNX85500 is able to read and write in the DRAMs.
•
We can not yet conclude : Flash RAM and DRAMs are fully
operational/reliable.There still can be errors in the data
transfers, DRAM erros, read/write speed and timing
control.
No Uart logging at all:
•
In case there is no Uart logging coming out, check if the
startup script can be send over the I
2
C bus (3 trials to
startup) + power supplies are switched on and stable.
•
No startup will end up in a blinking LED status : error
LAYER 1 = “2”, error LAYER 2 = “53” (startup with SDM
solder paths short).
•
Error LAYER 2 = “15” (hardware cause) is more related to
a supply issue while error LAYER 2 = “53” (software cause)
refers more to boot issues.
Uart loggings reporting fault conditions, error messages, error
codes, fatal errors:
•
Failure messages should be checked and investigated.For
instance fatal error on the PNX51x0: check startup of the
back-end processor, supplies..reset, I
2
C bus. => error
mentioned in the logging as: *51x0 failed to start by itself*.
•
Some failures are indicated by error codes in the logging,
check with error codes table (see Table “
”).e.g. => <<<ERROR>>>PLFPOW_MERR.C :
First Error (id=10,Layer_1=2,Layer_2=23).
•
I
2
C bus error mentioned as e.g.: “ I
2
C bus 4 blocked”.
•
Not all failures or error messages should be interpreted as
fault.For instance root cause can be due to wrong option
codes settings => e.g. “DVBS2Suppoprted : False/True.
In the Uart log startup script we can observe and check the
enabled loaded option codes.
Defective sectors (bad blocks) in the Nand Flash can also be
reported in the logging.
Startup in the SW upgrade application and observe the Uart
logging:
Starting up the TV set in the Manual Software Upgrade mode
will show access to USB, meant to copy software content from
USB to the DRAM.Progress is shown in the logging as follows:
“cosupgstdcmds_mcmdwritepart: Programming 102400 bytes,
40505344 of 40607744 bytes programmed”.
Startup in Jett Mode:
Check Uart logging in Jet mode mentioned as : “JETT UART
READY”.
Uart logging changing preset:
=> COMMAND: calling DFB source = RC6, system=0, key = 4”.
5.8.9
Loudspeakers
Make sure that the volume is set to minimum during
disconnecting the speakers in the ON-state of the TV. The
audio amplifier can be damaged by disconnecting the speakers
during ON-state of the set!
5.8.10 PSL
In case of no picture when CSM (test pattern) is activated and
backlight doesn’t light up, it’s recommended first to check the
inverter on the PSL + wiring (LAYER 2 error = 17 is displayed
in SDM).
5.8.11 Tuner
Attention: In case the tuner is replaced, always check the tuner
options!
5.8.12 Display option code
Attention: In case the SSB is replaced, always check the
display option code in SAM, even when picture is available.
Performance with the incorrect display option code can lead to
unwanted side-effects for certain conditions.
New in this chassis:
While in the download application (start up in TV mode + “OK”
button pressed), the display option code can be changed via
062598 HOME XXX special SAM command (XXX=display
option in 3 digits).
