Philips Q549.2E LA Service Manual page 20

EN 20 5. Q549.2E LA
From I_17660_125a.eps
Reset-system is connected to USB
4to1HDMI Mux and channel decoder.
This cannot be done through the bootscript,
the I/O is on the standby µP
Timing need to be updated if
more mature info is available.
No
Code =
Layer1: 2
Layer2: 15
Switch AVC PNX8541
in reset (active low)
Wait 10ms
Switch the NVM reset
line HIGH.
Disable all supply related protections and
switch off the +3V3 +5V DC/DC converter.
Wait 5ms
switch off the remaining DC/DC
converters
Switch Standby
3-th try?
I/O line high.
Yes
Blink Code as
error code
Enter protection
Log channel decoder error:
2009-May-08
Service Modes, Error Codes, and Fault Finding
Reset-system is switched HIGH by the
AVC at the end of the bootscript
-reset,
AVC releases Reset-Ethernet when the
end of the AVC boot-script is detected
Reset-Audio and Audio-Mute-Up are
switched by MIPS code later on in the
startup process
Bootscript ready
No
in 1250 ms?
Set I²C slave address
of Standby µP to (60h)
RPC start (comm. protocol)
Flash to Ram
No
image transfer succeeded
within 30s?
Code =
SW initialization
No
Layer1: 2
succeeded
Layer2: 53
within 20s?
Enable Alive check mechanism
MIPS reads the wake up reason
from standby µP.
Initialize audio
Switch on the display in case of a LED backlight
display by sending the TurnOnDisplay(1) (I²C)
command to the PNX5100
Download firmware into the channel
No
decoder
Downloaded
Third try? No
successfully ?
Yes
initialize tuner , Master IF and channel
Layer1: 2
decoder
Layer2: 37
Initialize source selection
Initialize video processing IC 's
initialize AutoTV
Initialize Ambilight with Lights off .
Semi-Standby
Figure 5-5 "Off" to "Semi Stand-by" flowchart (part 2)
From I_17660_125a.eps
Reset-system is switched HIGH by the
AVC at the end of the bootscript
AVC releases Reset-Ethernet when the
end of the AVC boot-script is detected
Reset-Audio and Audio-Mute-Up are
switched by MIPS code later on in the
startup process
Yes
Timing needs to
be updated if more
mature info is
available.
Yes
Timing needs to be
updated if more
mature info is
available .
Yes
Wait until AVC starts to
communicate
In case of a LED backlight display , a LED DIM panel is
present which is fed by the Vdisplay. To power the LED DIM
Panel, the Vdisplay switch driven by the PNX 5100 must be
closed. The display startup sequence is taken care of by the
LED DIM panel .
Yes
Release reset MPEG4 module:
BOLT-ON-IO: High
MPEG4 module will start booting
autonomously.
Wait 3000 ms
POR polling positive ?
yes
Alive Start alive IIC polling
yes
polling mechanism
NOK
Log SW event
STi7100AliveFailedError
and generate fast cold reboot
eventually followed by a cold
reboot.
Log SW event:
No
STi7100PorFailure
Wait 200 ms
POR polling positive ?
No
bootSTi7100PorFailure:
Log HW error
Layer1: 2
Layer2: 38
and generate cold boot
I_17660_125b.eps
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