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Service Modes, Error Codes, and Fault Finding

LVDS signals (> 1280×960). Below this resolution, or when a
DVI monitor is used, the displayed picture will be full size.

How to Connect

Connections are explained in the user manual, which is packed
with the tool. The LVDS cables included in the package cover
most chassis. For some chassis, a separate cable must be
ordered.

Note:

To use the LVDS tool, you must have ComPair release

2004-1 (or later) on your PC (engine version >= 2.2.05).
For every TV type number and screen size, one must choose
the proper settings via ComPair. The ComPair file will be
updated regularly with new introduced chassis information.

How to Order

•

LVDS tool (incl. two LVDS cables: 31p and 20p, covering
chassis BJx.x, EJx.x, FJx.x and LC4.1):
3122 785 90671.

•

LVDS tool Service Manual:
3122 785 00810.

•

LVDS cable 20p/DF -> 20p/DF (standard with tool):
3122 785 90731.

•

LVDS cable 31p/FI -> 31p/FI (standard with tool):
3122 785 90662.

For other chassis, a separate LVDS cable must be ordered.
Refer to table “LVDS cable order number” for an overview of all
deliverable cables.

Table 5-3 LVDS cable order number

Notes

Included in LVDS tool package (order code
3122 785 90671)

Pins 27 and 28 should be grounded or not connected.

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 protection.

•

Failing I2C device.

•

General I2C error.

•

SDRAM failure.

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 “The Blinking LED Procedure”.

•

Via ComPair.

5.4.3

Error Codes

In case of non-intermittent faults, write down the errors present
in the error buffer and clear the error buffer before you begin
the repair. This ensures 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
and not the actual cause of the problem (for example, a fault in
the protection detection circuitry can also lead to a protection).

Chassis

LVDS cable order number

Remarks

BJ2.4

3122 785 90662

BJ2.5

3122 785 90662

BJ3.0

3122 785 90662

BJ3.1

3122 785 90662

EJ2.0