Service Modes, Error Codes, and Fault Finding
EN 14
TCM2.0E LA
5.
5.2.4
Blinking LED Procedure
The software is capable of identifying different kinds of errors.
Because it is possible that more than one error can occur over
time, an error buffer is available which is capable of storing the
last five errors that occurred. This is useful if the OSD is not
working properly.
Errors can also be displayed by the blinking LED procedure.
The method is to repeatedly let the front LED pulse with as
many pulses as the error code number, followed by a period of
1.5 seconds in which the LED is “off”. Then this sequence is
repeated.
Any RC command terminates the sequence. Error code LED
blinking is in white colour.
Example: the contents of the error buffer is “013 007 000 000
000”.
After entering SDM, the following occurs:
•
1 long blink of 5 seconds to start the sequence
•
1 medium blink of 3 seconds and then 3 short blinks
followed by a pause of 1.5 seconds
•
7 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.
5.3
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.
Basically there are six kind of errors:
5.4
Fault Finding
Figure 5-10 No picture, no sound, no backlight, fuse broken (19", 20", and 22" sets)
Code Description Detection method
Type
0
no error
3
μ
P Control
I
2
C-bus
Error log +
blinking in SDM
4
General I
2
C
bus Error
I
2
C-bus
Prot
spontaneous
7
Tuner
I
2
C-bus
Error log +
blinking in SDM
8
Demodulator I
2
C-bus
Error log +
blinking in SDM
10
MT8295
I
2
C-bus
Error log +
blinking in SDM
13
HDMI switch I
2
C-bus
Error log +
blinking in SDM
No Picture, no
s
ound, no Black li
g
ht, Fu
s
e Broken
For Q800,pin5~6
of i
s
5V & pin7~8
i
s
12V , OK?
I
s
U800~U808&U2
01 OK?
Replace the bad
one of
u800~u808&U201
For P804 ,Pin 8~11
i
s
12V& Pin2~
3
of
i
s
5v
, OK?
Check Pin 10 Of
U810. i
s
it
3
.
3
v?
Check
LQFP jointin
g
of
U20
3
NO
NO
NO
YE
S
YE
S
YE
S
Check
X200,C221,C222,C
2
3
,L214 & IIC Bu
s
YE
S
Check jointin
g
of
U204,R271~R288,R
248~R260.
YE
S
Check P
S
U
I_17950_009.ep
s
0
8
050
8
