Service Modes, Error Codes, and Fault Finding
5.
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
5.6
The Blinking LED Procedure
Using this procedure, you can make the contents of the error
buffer visible via the front LED. This is especially useful when
there is no picture.
When the SDM is entered, the front LED will blink the contents
of the error-buffer:
•
The LED blinks with as many pulses as the error code
number, followed by a time period of 1.5 seconds, in which
the LED is off.
•
Then this sequence is repeated.
Any RC5 command terminates this sequence.
Example
of error buffer:
12 9 6 0 0
After entering SDM, the following occurs:
•
1 long blink of 5 seconds to start the sequence,
•
12 short blinks followed by a pause of 1.5 seconds,
•
9 short blinks followed by a pause of 1.5 seconds,
•
6 short blinks followed by a pause of 1.5 seconds,
•
1 long blink of 1.5 seconds to finish the sequence,
•
The sequence starts again with 12 short blinks.
5.7
Fault Finding and Repair Tips
Notes:
•
It is assumed that the components are mounted correctly
with correct values and no bad solder joints.
•
Before any fault finding actions, check if the correct options
are set.
5.7.1
NVM Editor
In some cases, it can be handy if one directly can change the
NVM contents. This can be done with the “NVM Editor” in SAM
mode. With this option, single bytes can be changed.
Caution:
•
Do not change the NVM settings without
understanding the function of each setting, because
incorrect NVM settings may seriously hamper the
correct functioning of the TV set!
•
Do not change the Scaler NVM settings, as this will
hamper the DVI functionality of the TV set!
•
Always note down the existing NVM settings, before
changing the settings. This will enable you to return to the
orgininal settings, if the new settings turn out to be
incorrect.
Table 5-2 NVM editor 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
-
-
-
Hex
Dec
Description
.ADR
0x000A
10
Existing value
.VAL
0x0000
0
New value
.Store
Store?
www.freeservicemanuals.info
