Philips EJ3.0UPA Service Manual page 24

EN 24 5. EJ3.0U PA
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 Viper in reset state
Wait 10ms
Switch the NVM reset line HIGH.
Disable all supply related protections and switch off
the +2V5, +3V3 DC/DC converter.
Wait 5ms
switch off the remaining DC/DC converters
Switch OFF all supplies by switching HIGH the POD-
MODE and the ON-MODE I/O lines.
Flash LED in order to indicate
protection state*. (see FRS)
Protection
Figure 5-12 "Protection" flowchart
SP
(*): This can be the standby LED or the ON LED
depending on the availability in the set under
discussion.
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