Service Modes, Error Codes, and Fault Finding
5.
Menu Explanation
1.
Set Type
Type number and region.
2.
Production code
Product serial no.
3.
SW naming main-processor
Software cluster and version
is displayed.
4.
Standby MCU SW
Software version stand-by
μ
Processor.
5.
Code
Error buffer contents.
6.
NVM
NVM version.
7.
Signal Quality
Yes/No (antenna signal).
8.
System
TV system (PAL)
9.
Sound
Audio system (Mono/Stereo/Nicam stereo)
10.
Key (HDCP) HDMI
Shows Valid or invalid when HDMI
connected. Else blank.
11.
HDMI input format
Shows HDMI picture format display,
i.e. 480p30, when HDMI connected. Else blank.
12.
HDMI audio Stream
Show Yes/No when HDMI connected.
Else blank.
How to exit
Press “MENU” on the RC-transmitter.
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, noBlack light, Fuse Broken
Error code Area
Description
2
MT8293
Communication error with
MT8293
3
μ
P Control
Communication error with
standby MCU
4
IIC bus Error
Communication error on I
2
C
bus (none of the I
2
C devices
respond)
6
System EEPROM
(NVM)
Communication error with
system EEPROM
7
Tuner
Communication error with
tuner.
8
Demodulator
Communication error with
demodulator.
Error code Area
Description
No Picture, no sound, no Black light, Fuse Broken
pin4~5 is 5V &
pin7~8 is12V of
U505 OK?
Is U1-U5, U11
OK?
Replace Bad
one of
u1~u5,u11
Pin2~3 is 5v&Pin
8~11 is 12V of
P502 OK?
Check Pin 4 Of
UM01 is 3.3v
Check
LQPF jointing of
U6
O
N
O
N
NO
S
E
Y
S
E
Y
YES
Check Pin7~8 of
P503 & pin8~9 of
J8
Check Y1,C23,C69
& IIC Bus &Reset
YES
Check jointing of
U8,u7,R213~R218,
R42,R44.
YES
NO
Check PSU
I_179
3
0_076.ep
s
25040
8