Service Modes, Error Codes, and Fault Finding
5.
Figure 5-10 “Semi Stand-by” to “Stand-by” flowchart
transfer Wake up reasons to the Stand by µP.
Stand by
Semi Stand by
action holder: MIPS
autonomous action
action holder: St-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
Switch reset-PNX5100 LOW
Switch reset-ST7100 LOW
Switch Reset-Ethernet LOW
Important remark:
release reset audio 10 sec after
entering standby to save power
Wait 5ms
Wait 10ms
Switch the NVM reset line HIGH
Switch het 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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