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Service Modes, Error Codes, and Fault Finding
EN 26 Q549.2E LA5.
2009-May-08
Figure 5-11 “To Protection State” flowchart
Protection
action holder: MIPS
autonomous action
action holder: St-by
Redefine wake up reasons for protection
state and transfer to stand-by µP.
Log the appropriate error and
set stand-by flag in NVM
MP
Ask stand-by µP to enter protection state
Flash the Protection-LED in order to indicate
protection state* (*): This can be the standby LED or the ON LED
depending on the availability in the set
SP
Switch off LCD lamp supply
Wait 250ms (min. = 200ms)
Switch off LVDS signal
Switch off 12V LCD supply within a time frame of
min. 0.5ms to max. 50ms after LVDS switch off.
If needed to speed up this transition,
this block could be omitted. This is
depending on the outcome of the
safety investigations .
Disable all supply related protections and switch off
the +1V8 and the +3V3 DC/DC converter.
Switch OFF all supplies by switching HIGH the
Standby I/O line.
Switch AVC in reset state
Wait 5ms
Wait 10ms
Switch the NVM reset line HIGH.
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