Service Modes, Error Codes, and Fault Finding
5.
How to Connect
This is described in the chassis fault finding database in
ComPair.
Figure 5-12 ComPair II interface connection
Caution:
It is compulsory to connect the TV to the PC as
shown in the picture above (with the ComPair interface in
between), as the ComPair interface acts as a level shifter. If
one connects the TV directly to the PC (via UART), ICs will be
blown!
How to Order
ComPair II order codes:
•
ComPair II interface: 3122 785 91020.
•
Software is available via internet:
http://www.atyourservice.ce.philips.com
•
ComPair UART interface cable for Q52x.x.
(using 3.5 mm Mini Jack connector): 3104 311 12742.
Note:
While encounting problems, contact the local support
desk.
5.4.2
Memory and Audio Test
With this tool you can test the memory of the PNX8541, as well
if the PNX5100 is enabled and audio-testing.
What is needed?
–
An USB-stick.
–
“TESTSCRIPT Q529” (3104 337 05021). Downloadable
from the Philips Service website from the section “Software
for Service only”.
–
A ComPair/service cable (3104 311 12742)
Procedure
Create a directory “JETTFILES” under the root of the USB-stick
–
Place “MemoryTestPNX8635.bin” and “autojett.bin”
(available in “TESTSCRIPT Q529”) under the directory
“JETTFILES”
–
Install the computer program “BOARDTESTLOGGER”
(available in “TESTSCRIPT Q529”) on the PC
–
Connect a “ComPair/service”-cable from the service-
connector in the set to the COM1-port of the PC
–
Start-up the program “BOARDTESTLOGGER” and select
“COM1”
–
Put the USB stick into the TV and startup the TV while
pressing the “i+”-button on a Philips DVD RC6 remote
control (it’s also possible to use a TV remote in “DVD”-
mode)
–
On the PC the memory test is shown now. This is also
visible on the TV screen.
–
In “BOARDTESTLOGGER” an option “Send extra UART
command” can be found where you can select “AUD1”.
This command generates hear test tones of 200, 400,
1000, 2000, 3000, 5000, 8000 and 12500Hz.
5.4.3
LVDS Tool
Support of this LVDS Tool has been discontinued.
5.5
Error Codes
5.5.1
Introduction
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.
New in this chassis is the way errors can be displayed:
•
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.(see table 5-2
error code overview).
–
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
.
Important remark:
For all errors detected by MIPS which are fatal =>
rebooting of the TV set (reboot starts after LAYER error
1 blinking), one should short the solder paths at start-
up from the power OFF state by mains interruption and
not via the power button to trigger the SDM via the
hardware pins.
•
In CSM mode
–
When entering CSM: error
LAYER 1
will 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 2
is displayed via blinking LED.
•
In the ON state
–
In “Display error mode”, set with the RC commands
“mute_06250X _OK”
LAYER 2
errors are 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 error 1.
(see section “5.6 The Blinking LED Procedure”).
•
Errors detected by the Stand-by software which not
lead to protection.
In this case the front LED should blink
the involved error. See also section “5.5 Error Codes, 5.5.4
Error Buffer, Extra Info”. Note that it can take up several
minutes before the TV starts blinking the error (e.g. LAYER
error 1 = 2, LAYER error 2 = 15 or 53).
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