Philips 26PF5320/28 Service Manual page 19

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
0 Not applicable
1 Not applicable
2 Not applicable
3 Not applicable
4 Genesis Scaler
Flash-ROM
5 Scaler supply
7752
6 Not applicable
7 ADC
8 Scaler EEPROM I
9 Hercules
EEPROM
10 Tuner
11 Columbus
12 Not applicable
13 HDMI Panellink
Receiver/
Decoder
14 Scaler SDRAM
15 Not applicable
16 EPLD
17 Digital Module
(only on Digital
sets)
18 Not applicable
Service Modes, Error Codes, and Fault Finding
Error Description Check Item
No Error
Mis-match of TV -
Hercules SW and
Scaler SW
- -
- -
2
I C error while 7801
communicating with
the Genesis Scaler
and/or Flash-ROM 7B01
is faulty/empty
+5V protection 7752
2
General I C error 1102, 7L04, 7M00 B1 + B18
2
I C error 7L04
2
C error while 7C01
communicating with
the Scaler
EEPROM
2
I C error while 7207
communicating with
the Hercules
EEPROM (NVM for
TV).
Remark: when the
Hercules EEPROM
is defective, the
Hercules should
operate with its
default values.
2
I C error while 1102, F102, F104,
communicating with F107
the PLL tuner
2
I C error while 7M00
communicating with
the 2D/3D
combfilter
Columbus
- -
2
I C error while 7D03
communicating with
the iBoard HDMI
Panellink Receiver/
Decoder (only in
NAFTA and AP
sets)
Read-write error 7B01
with the Scaler
SDRAM
- -
2
I C error while 7N02
communicating with
EPLD
2
I C error while Digital Module
communicating with (only on Digital
the Digital Module sets)
(only on Digital
sets)
- -
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.
Diagram
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,
B7 + B8
• 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.
B10
B6
5.7 Fault Finding and Repair Tips
+ B19
Notes:
B18
• It is assumed that the components are mounted correctly
B11
with correct values and no bad solder joints.
• Before any fault finding actions, check if the correct options
are set.
B2
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
B1
understanding the function of each setting, because
incorrect NVM settings may seriously hamper the
correct functioning of the TV set!
B19
• 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
B12
incorrect.
(only in
NAFTA
and AP
Table 5-2 NVM editor overview
sets)
B10
.ADR
.VAL
-
.Store
B20 +
B21
-
LC4.3U AA 5.
Hex Dec Description
0x000A 10 Existing value
0x0000 0 New value
Store?
EN 19