Philips P&S 22HFL4372D/10 Service Manual page 21

Service Modes, Error Codes, and Fault Finding
Mute all sound outputs via softmute
Set main amplifier mute (I/O: audio-mute)
Force ext audio outputs to ground
Wait until Ambilight has faded out: Output power
Yes
Instruct 200Hz
Tcon to turn off Switch off LVDS output in 85500
the display
Semi Standby
Figure 5-13 "Active" to "Semi Stand-by" flowchart
Active
Wait 100ms
(I/O: audio reset)
And wait 5ms
switch off Ambilight
Observer should be zero
Switch off POK line
detection algorithm
switch off LCD backlight
(I/O or I²C)
Mute all video outputs
200Hz set?
No
Wait x ms (display file)
Wait x ms
Switch off the display power by
switching LCD-PWR-ON high
back to
div. table
Q552.1HE LA 5.
The exact timings to
switch off the
display (LVDS
delay, lamp delay)
are defined in the
display file.
18770_255_100216.eps
EN 21
100216
2010-Nov-19