Philips 42PFL6008S/12, Руководство по обслуживанию

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Service Modes, Error Codes, and Fault Finding EN 33 QFU1.2E LA 5.
2014-Jan-10
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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 “QFUX.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 over and over). Also available in the logging is
the “Display Option Code” (useful when there is no picture),
look for item “display number xxx” 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.
5.8.7 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 Fusion processor 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 errors, read/write speed and timing
control.
No Uart logging at all:
•
No startup will end up in a blinking LED status: error
LAYER 1 = “2”, error LAYER 2 = “53” (startup with SDM
solder paths continuous 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:
•
Some failures are indicated by error codes in the logging,
check with error codes table (see Table “
5-2 Error code
overview ”). e.g. => <<<ERROR>>>PLFPOW_MERR.C :
First Error (id=10,Layer_1=2,Layer_2=23).
• I
2
C bus errors.
• 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. “FpgaDimmingPresent: 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 feedback can be found in the
logging.
Startup in Jett Mode:
Check Uart logging in Jet mode mentioned as : “JETT UART
READY”.
5.8.8 Memory test
The memory test is running in the background of the main
TV software.It allocates a memory pool used to write and
read back predefined data, as reference to detect possible
memory corruption.The memory test is enabled by dial-in
of sequence “6636” while the remote control (dedicated) is
in DVD mode and the TV in CSM.Once the red LED in the
front of the TV set starts blinking, exit CSM in order to
display video.As long as the memory test is running and
no error is detected, the standby LED is blinking.Upon
detection of errors, the standby LED stays continuous ON
and details will be shown in the prints of the Uart logging.It
is not possible to stop the memory test once launched
unless the TV is restarted, also increase/decrease the
frequency of the memory interface can not be set.
Startup procedure:
•
Switch ON the TV set.
• Set TV use case (preferably DVBT H264 or HDMI1080p).
• Invoke CSM (dial-in “123654”on the remote control).
• Set the remote control in DVD mode, and enter sequence
“6636”.
• Check the loggings coming from the service connector
(Mips Uart prints) :
“**MemoryTest No errors found so far (loop xx)”
xx : number of tests done.
• As long as the memory test is running and no error is
detected, the standby LED is blinking continuously, upon
detection of errors, the standby LED stays ON.
• Get out of CSM in order to see video.
COM port settings:
•
Baud rate: 115200
• Data: 8 bits
• Parity: none
• Stop: 1 bit
• Flow control: none
Error detection :
In case some errors are detected, the standby LED will stop
blinking and following logs can be retrieved in the Uart prints:
•
Error: offset [address] (READ/WRITE) xxxxxxxx/yyyyyyyy/
zzzzzzzz should be nnnnnnnn.
with:
• Offset: offset address where error is detected from start of
buffer.
• Address: physical address where error is detected from
start of buffer.
• READ/WRITE: indicates if error occurred during read or
write memory access.
• xxxxxxxx/yyyyyyyy/zzzzzzzz: the 3 data reads from the
memory location where the error(s) occurred.
• nnnnnnnn: correct data (expected content).
In some cases the TV software can crash before an error is
detected.Thus, symptoms of software crash (reboot, picture
freeze, no picture) should also be considered as test failure.
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!