Philips BP2.2U Service Manual page 25

Service Modes, Error Codes, and Fault Finding
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.
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 (for LCD sets)
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". (for LCD sets)
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*.
Protection
Figure 5-11 "Protection" flowchart
BP2.2U, BP2.3U
(*): This can be the standby LED or the ON LED
depending on the availability in the set under
discussion.
5. EN 25
SP
F_15400_102.eps
120505