Service Modes, Error Codes, and Fault Finding
EN 32 Q528.2E LB5.
Figure 5-10 “Protection” 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 under
discussion.
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.
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 lines.
Switch AVC in reset state
switch off the +1V2 DC/DC converter
Wait 5ms
Wait 10ms
Switch the NVM reset line HIGH.
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