Philips 26HFL5870D/10 Service Manual page 33

Service Modes, Error Codes, and Fault Finding Q522.1HE LA 5. EN 33
action holder: AVC
action holder: St-by
autonomous action
Semi Standby
Wait until previous on-state is left more than 2
seconds ago. (to prevent LCD display problems)
Assert RGB video blanking
and audio mute
Rewrite Pacific register 0x03 (output format) :
this command is sometimes not processed properly by the
Pacific at initialisation time , resending it here solves the issue.
Switch on the display by sending the
PanelConfig.PanelOn (I²C) command to the Pacific
Initialize audio and video
processing IC's and functions
according needed use case.
wait 250ms (min. = 200ms)
Switch off the dimming backlight feature and
make sure PWM output is set to 100%
Switch on LCD backlight
The higher level requirement is that
audio and video should be demuted
without transient effects and that the
Wait until valid and stable audio and video , corresponding to
audio should be demuted maximum 1s
the requested output is delivered by the AVC AND the
before or at the same time as the
backlight PWM has been on for 1second.
unblanking of the video.
Switch Audio-Reset low and wait 5ms
Release audio mute and wait 100ms before any other audio
handling is done (e.g. volume change)
Restore dimming backlight feature, PWM output and unblank
the video.
Active
H_16770_110.eps
290307
Figure 5-7 "Semi Stand-by" to "Active" flowchart
2009-Dec-04