Service Modes, Error Codes, and Fault Finding
EN 22 Q548.1E LB5.
2009-Dec-18
Figure 5-8 “Semi Stand-by” to “Stand-by” flowchart
18440_220_090227.eps
091112
Transfer Wake up reasons to the Stand by µP.
Stand by
Semi Stand by
Disable all supply related protections and switch off
the DC/DC converters (ENABLE-3V3)
Switch OFF all supplies by switching HIGH the
Standby I/O line
Switch AVC system in reset state (reset-system and
reset-AVC lines)
Switch reset-PNX5100 LOW
Switch Reset-Ethernet LOW
Important remarks:
release reset audio 10 sec after entering
standby to save power
Also here, the standby state has to be
maintained for at least 4s before starting
another state transition.
Wait 5ms
Wait 10ms
Switch the NVM reset line HIGH
Switch WP-Nandflash LOW
Delay transition until ramping down of ambient light is
finished. *)
If ambientlight functionality was used in semi-standby
(lampadaire mode), switch off ambient light
*) If this is not performed and the set is
switched to standby when the switch off of
the ambilights is still ongoing, the lights will
switch off abruptly when the supply is cut.
Switch Memories to self-refresh (this creates a more
stable condition when switching off the power).
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