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EN 22
5.
Q522.3E LA
action holder: MIPS
action holder: St-by
autonomous action
If needed to speed up this transition,
this block could be omitted . This is
depending on the outcome of the
safety investigations .
Service Modes, Error Codes, and Fault Finding
MP
Log the appropriate error and
set stand-by flag in NVM
Redefine wake up reasons for protection
state and transfer to stand-by µP.
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" .
Ask stand-by µP to enter protection state
Switch AVC in reset state
Wait 10ms
Switch the NVM reset line HIGH.
Disable all supply related protections and switch "off"
the +1V8 and the +3V3 DC/DC converter.
Wait 5ms
Switch "off" the +1V2 DC/DC converter
Switch "off" all supplies by switching HIGH the
Standby I/O lines.
Flash the Protection-LED in order to indicate
protection state *
Protection
Figure 5-9 "To Protection" state flowchart
SP
(*): This can be the "Standby" LED or the "On" LED
depending on the availability in the set under
discussion
.
I_18010_073.eps
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