Service Modes, Error Codes, and Fault Finding
5.
5.3
Service Tools
5.3.1
ComPair
Introduction
ComPair (Computer Aided Repair) is a Service tool for Philips
Consumer Lifestyle products. and offers the following:
1.
ComPair helps you to quickly get an understanding on how
to repair the chassis in a short and effective way.
2.
ComPair allows very detailed diagnostics and is therefore
capable of accurately indicating problem areas. You do not
have to know anything about I2C or UART commands
yourself, because ComPair takes care of this.
3.
ComPair speeds up the repair time since it can
automatically communicate with the chassis (when the uP
is working) and all repair information is directly available.
4.
ComPair features TV software up possibilities.
Specifications
ComPair consists of a Windows based fault finding program
and an interface box between PC and the (defective) product.
The (new) ComPair II interface box is connected
to the PC
via
an USB cable. For the TV chassis, the ComPair interface box
and the TV communicate via a bi-directional cable via the
service connector(s).
How to Connect
This is described in the ComPair chassis fault finding database.
Figure 5-7 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.
•
ComPair UART interface cable: 3138 188 75051.
•
Program software can be downloaded from the Philips
Service website.
Note:
If you encounter any problems, contact your local
support desk.
5.3.2
LVDS Tool
Support of the LVDS Tool has been discontinued.
5.4
Error Codes
5.4.1
Introduction
Error codes are required to indicate failures in the TV set. In
principle a unique error code is available for every:
•
Activated (SW) protection.
•
Failing I
2
C device.
•
General I
2
C error.
The last five errors, stored in the NVM, are shown in the
Service menu’s. This is called the error buffer.
The error code buffer contains all errors detected since the last
time the buffer was erased. The buffer is written from left to
right. When an error occurs that is not yet in the error code
buffer, it is displayed at the left side and all other errors shift one
position to the right.
An error will be added to the buffer if this error differs from any
error in the buffer. The last found error is displayed on the left.
An error with a designated error code may
never
lead to a
deadlock situation. This means that it must always be
diagnosable (e.g. error buffer via OSD or blinking LED
procedure, ComPair to read from the NVM).
In case a failure identified by an error code automatically
results in other error codes (cause and effect), only the error
code of the MAIN failure is displayed.
Example:
In case of a failure of the I2C bus (CAUSE), the error
code for a “General I2C failure” and “Protection errors” is
displayed. The error codes for the single devices (EFFECT) is
not displayed. All error codes are stored in the same error
buffer (TV’s NVM) except when the NVM itself is defective.
5.4.2
How to Read the Error Buffer
You can read the error buffer in 3 ways:
•
On screen via the SAM/SDM/CSM (if you have a picture).
Example:
–
ERROR: 0 0 0 0 0
: No errors detected
–
ERROR: 6 0 0 0 0
: Error code 6 is the last and only
detected error
–
ERROR: 9 6 0 0 0
: Error code 6 was detected first and
error code 9 is the last detected (newest) error
•
Via the blinking LED procedure (when you have no
picture). See paragraph 5.5 The Blinking LED Procedure.
•
Via ComPair.
5.4.3
Error codes
The layer 1 error codes are pointing to the defective board.
They are triggered by LED blinking when CSM is activated. In
the LC09M platform, only two boards are present: the SSB and
the PSU, meaning only two layer 1 errors are defined (or three
in case an additional bolt-on module is added):
•
2: SSB
•
4: PSU
•
6: Bolt-on.
The following layer 2 errors have been assigned:
•
00: no error
•
11: DC protection of speakers, detected by MT539x
•
12: +12V protection error (or 12V failure), detected by
standby processor during start-up
•
13: POK line error
•
14: General I
2
C bus error when all the devices I
2
C devices
on the same bus had no response
•
15: I
2
C error while communicating with the main EEPROM
•
16: I
2
C error while communicating with the PLL/hybrid
tuner
•
17: I
2
C error while communicating with the HDMI Mux IC
ADV3002
•
18: IF demodulator TDA9886
•
19: Reserved
10000_0
3
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