ERROR CODES DESCRIPTION
The
error code buffer contains all detected errors since the last time the buffer
was erased. The buffer is written from left to right, new errors are logged at
the left side, and all other errors shift one position to the right. When an error occurs, it is added to the
list of errors, provided the list is not full. When an error occurs and the
error buffer is full, then the new error is not added, and the error buffer
stays intact (history is maintained).
To prevent that an occasional error stays in the list forever, the error
is removed from the list after more than 50 hrs. of operation.
When
multiple errors occur (errors occurred within a short time span), there is a
high probability that there is some relation between them.
New in
this chassis is the way errors can be displayed:
If no errors are there, the LED should not blink at
all in CSM or SDM. No spacer must be displayed as well.
There is a simple blinking LED procedure for board
level repair (home repair) so called LAYER 1 errors next to
the existing errors which are LAYER 2 errors.
LAYER 1
errors are one digit errors.
LAYER
2 errors are 2 digit errors.- In protection mode.
From
SDM mode: LAYER 2.
- Fatal errors, if I2C bus is blocked and the set reboots, CSM and SAM are not selectable.
From SDM mode: LAYER 2.
- In CSM mode.
- In SDM mode.
- Error display on screen.
In SAM
the complete error list is shown.
- Basically there are three kinds of errors:
- Errors detected by the Stand-by software which lead to protection. These errors will always lead to protection and an automatic start of the blinking LED LAYER 1 error.
- Errors detected by the Stand-by software which not lead to protection. In this case the front LED should blink the involved error. Note that it can take up several minutes before the TV starts blinking the error (e.g. LAYER 1 error = 2, LAYER 2 error = 15 or 53).
- In this case the error will be logged into the error buffer and can be read out via ComPair, via blinking LED method LAYER 1-2 error, or in case picture is visible, via SAM.
HOW TO READ ERROR BUFFER
Use one
of the following methods:
On
screen via the SAM (only when a picture is visible).
E.g.:
- 00 00 00 00 00: No errors detected
- 23 00 00 00 00: Error code 23 is the last and only detected error.
- 37 23 00 00 00: Error code 23 was first detected and error code 37 is the last detected error. Note that no protection errors can be logged in the error buffer.
HOW TO CLEAR ERROR BUFFER
Use one
of the following methods:
- By activation of the “RESET ERROR BUFFER” command in the SAM menu.
- If the content of the error buffer has not changed for 50+ hours, it resets automatically.
Error Buffer
In case
of non-intermittent faults, clear the error buffer before starting to repair (before clearing the buffer, write down
the content, as this history can give significant information). This to ensure
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 code and not the actual cause
(e.g. a fault in the protection detection circuitry can also lead to a
protection).
There
are several mechanisms of error detection:
- Via error bits in the status registers of ICs.
- Via polling on I/O pins going to the stand-by processor.
- Via sensing of analog values on the stand-by processor or the PNX85500.
- Via a “not acknowledge” of an I2C communication.
ERROR CODE OVERVIEW
Description
|
Layer 1
|
Layer 2
|
Monitored
by
|
Error/
Prot
|
Error Buffer/
Blinking LED
|
Device
|
Defective Board
|
I2C3
|
2
|
13
|
MIPS
|
E
|
BL / EB
|
SSB
|
SSB
|
I2C2
|
2
|
14
|
MIPS
|
E
|
BL / EB
|
SSB
|
SSB
|
I2C4
|
2
|
18
|
MIPS
|
E
|
BL / EB
|
SSB
|
SSB
|
PNX doesn’t boot (HW cause)
|
2
|
15
|
Stby Μp
|
P
|
BL
|
PNX8550
|
SSB
|
12V
|
3
|
16
|
Stby μP
|
P
|
BL
|
--------
|
Supply
|
Inverter or display supply
|
3
|
17
|
MIPS
|
E
|
EB
|
--------
|
Supply
|
PNX51X0
|
2/9
|
21
|
MIPS
|
E
|
EB
|
PNX51X0
|
200 Hz board
|
HDMI mux
|
2
|
23
|
MIPS
|
E
|
EB
|
Sil9x87A
|
SSB
|
I2C switch
|
2
|
24
|
MIPS
|
E
|
EB
|
PCA9540
|
SSB
|
AV-PIP board
|
8
|
25
|
MIPS
|
E
|
EB
|
-------
|
AV PIP board
|
Channel dec DVB-S
|
2
|
28
|
MIPS
|
E
|
EB
|
STV0903
|
SSB
|
Lnb controller
|
2
|
31
|
MIPS
|
E
|
EB
|
LNBH23
|
SSB
|
Tuner
|
2
|
34
|
MIPS
|
E
|
EB
|
DTT 71300
|
SSB
|
Main nvm
|
2
|
35
|
MIPS
|
E
|
EB
|
STM24C64
|
SSB
|
Tuner DVB-S
|
2
|
36
|
MIPS
|
E
|
EB
|
STV6110
|
SSB
|
T* sensor SSB/set
|
2
|
42
|
MIPS
|
E
|
EB
|
LM 75
|
T* sensor
|
T* sensor LED driver/Tcon
|
7
|
42
|
MIPS
|
E
|
EB
|
LM 75
|
T* sensor
|
PNX doesn’t boot (SW cause)
|
2
|
53
|
Stby μP
|
P
|
BL
|
PNX8550
|
SSB
|
Display
|
5
|
64
|
MIPS
|
E
|
BL/EB
|
Altera
|
Display
|
