Philips LC4.9E, Руководство по обслуживанию

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Service Modes, Error Codes, and Fault Finding EN 16 LC4.9E AB 5.
Since 2004, the LVDS output connectors in our Flat TV models
are standardised (with some exceptions). With the two
delivered LVDS interface cables (31p and 20p) you can cover
most chassis (in special cases, an extra cable will be offered).
When operating, the tool will show a small (scaled) picture on
a VGA monitor. Due to a limited memory capacity, it is not
possible to increase the size when processing high-resolution
LVDS signals (>= 1280x768). Generally this tool is intended to
determine if the SSB is working or not. Thus to determine if
LVDS, RGB, and sync signals are okay.
How to Connect
Connections are explained in the user manual, which is
delivered with the tool.
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):
3122 785 90671.
• Service Manual LVDS tool:
3122 785 00810.
• LVDS cable 20p (for Telra 14-inch):
3122 785 90810.
• LVDS cable 30p (for LC4.3):
3122 785 90820.
• LVDS cable 41p-to-31p for CA1 (dual -> single LVDS):
3122 785 90830.
5.5 Error Codes
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.
5.5.1 How to Read the Error Buffer
You can read the error buffer in 3 ways:
•
On screen via the SAM (if you have a picture).
Examples:
– 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.
5.5.2 How to Clear the Error Buffer
The error code buffer is cleared in the following cases:
•
By using the CLEAR command in the SAM menu:
–
To enter SAM, press the following key sequence on the
remote control transmitter: “
062596 ” directly followed
by the OSD/STATUS button (do not allow the display
to time out between entries while keying the
sequence).
– Make sure the menu item CLEAR is highlighted. Use
the MENU UP/DOWN buttons, if necessary.
– Press the MENU RIGHT button to clear the error
buffer. The text on the right side of the “CLEAR” line will
change from “CLEAR?” to “CLEARED”
• If the contents of the error buffer have not changed for 50
hours, the error buffer resets automatically.
Note: If you exit SAM by disconnecting the mains from the
television set, the error buffer is not reset.
5.5.3 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).
Table 5-1 Error code overview
Error Device Error Description Check Item Diagram
0 Not applicable No Error
1 Not applicable Mis-match of TV
Hercules SW and
Scaler SW - -
2 Not applicable - - -
3 Not applicable - - -
4 Genesis Scaler
Flash-ROM
I
2
C error while
communicating with
the Genesis Scaler
and/or Flash-ROM
is faulty/empty
7801
7B01
B7 + B8
B10
5 Scaler supply
7752 +5V protection 7752 B6
6 Not applicable General I
2
C error 1102, 7L04, 7M00 B1 + B18
+ B19
7 ADC I
2
C error 7L04 B18
8 Scaler EEPROM I
2
C error while
communicating with
the Scaler
EEPROM
7C01 B11
9 Hercules
EEPROM I
2
C error while
communicating with
the Hercules
EEPROM (NVM for
TV).
Remark: when the
Hercules EEPROM
is defective, the
Hercules should
operate with its
default values.
7207 B2
10 Tuner I
2
C error while
communicating with
the PLL tuner
1102, F102, F104,
F107 B1
11 Columbus I
2
C error while
communicating with
the 2D/3D
combfilter
Columbus
7M00 B19
12 Not applicable - - -
13 HDMI Panellink
Receiver/
Decoder I
2
C error while
communicating with
the iBoard HDMI
Panellink Receiver/
Decoder (only in
NAFTA and AP
sets)
7D03 B12
(only in
NAFTA
and AP
sets)
14 Scaler SDRAM Read-write error
with the Scaler
SDRAM 7B01 B10
15 Not applicable - - -
16 EPLD I
2
C error while
communicating with
EPLD
7N02 B20 +
B21
17 Digital Module
(only on Digital
sets) I
2
C error while
communicating with
the Digital Module
(only on Digital
sets)
Digital Module
(only on Digital
sets)
18 Not applicable - - -