Service Modes, Error Codes, and Fault Finding
5.
Figure 5-7 “Active” to “Semi Stand-by” flowchart
1
8
440_219_090227.ep
s
270209
Semi Standby
Active
Wait x ms (display file)
Mute all sound outputs via softmute
Mute all video outputs
Switch off LCD backlight
Force ext audio outputs to ground
(I/O: audio reset) a nd wait 5ms
Switch off the display by sending:
- TurnOnDisplay(0) (I²C) command to the PNX5100
- or sending OUTPUT-ENABLE(0) to the LED DIM
panel in case of a LED BL set.
Switch off Ambilight
Set main amplifier mute (I/O: audio-mute)
Wait 100ms
Wait until Ambilight has faded out: Output power
Observer on PNX5100 should be zero
The higher level requirement is that the
backlight may not be switched off before the
ambilight functionality is turned off in case the
set contains a CE IPB inverter supply.
PNX5100 present?
Yes
No
Switch off the display power by
switching LCD-PWR-ON high
Wait x ms
Switch off LVDS output in 8543
The exact timings to
switch off the
display (LVDS
delay, lamp delay)
are defined in the
display file.
Switch off POK line detection
algorithm
