Philips 32PFL3904H/12 Service Manual page 19

Service Modes, Error Codes, and Fault Finding
From: 18440_216a_090227.eps
Reset-system is connected to the
Micronas MultiStandard 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 PNX8543
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 I/O line high
3-th try?
and wait 4 seconds
Yes
Blink Code as
error code
Enter protection
Figure 5-5 "Off/Stand-by" to "Semi Stand-by" flowchart (part 2)
From: 18440_216a_090227.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
Bootscript ready
in 1250 ms?
Yes
Set I²C slave address
of Standby µP to (60h)
RPC start (comm. protocol)
Flash to Ram
No image transfer succeeded
within 30s?
Yes
Code =
SW initialization
Layer1: 2 No
succeeded
Layer2: 53
within 20s?
Yes
Enable Alive check mechanism
MIPS reads the wake up reason
from standby µP.
5100 SW start
Wake up reason
coldboot & not semi-
standby?
yes
Startup screen cfg file
present?
yes
MIPS sends display parameters and
Bitmap to 5100
No
MIPS triggers 5100 to display the
startup screen
No
Startup screen visible
Initialize audio
Switch on the display in case of a LED backlight
display by sending the TurnOnDisplay(1) (I²C)
command to the PNX5100
Enable the PWM output towards the display LVDS
cable in case of a LED Backlight set.
(CTRL4-PNX5100)
Initialize tuner and Multi Standard decoder
Initialize source selection
Initialize video processing IC's :
- local contrast FPGA
- PNX5100 (if present)
Initialize AutoTV
Initialize Ambilight with Lights off.
Semi-Standby
Q543.1E LA
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
Timing needs to
be updated if more
mature info is
available.
Timing needs to be
updated if more
mature info is
available.
Wait until AVC starts to
communicate
Startup screen shall only be visible when there is a coldboot
to an active state end situation. The startup screen shall not
be visible when waking up for reboot reasons or waking up to
semi-standby conditions.
The first time after the option turn on of the startup screen or
when the set is virgin, the cfg file is not present and hence
the startup screen will not be shown.
To keep this flowchart readable, the exact display turn on
description is not copied here. Please see the Semi-standby
to On description for the detailed display startup sequence.
During the complete display time of the Startup screen, the
preheat condition of 100% PWM is valid.
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 PNX5100 must be closed. The
display startup sequence is taken care of by the LED DIM
panel. Secondly, this cmd will also enable the LVDS output of
the 5100 towards the LED DIM panel.
In case of a LED backlight display, the PWM-dimming signal
needs to be routed to the LVDS cable. This routing is not
allowed in non-LED sets (see also display configuration)
5. EN 19
18440_216b_090227.eps
090702
2009-Nov-20