Philips BP2.2U Service Manual page 19

From part B
Wait 10ms
Switch the NVM reset
line HIGH.
Disable all supply related protections and
switch off the +2V5, +3V3 DC/DC converter.
Wait 5ms
switch off the remaining DC/DC
converters
Switch POD-MODE and ON-MODE
3-th try?
I/O line "high".
Yes
Log Code as
error code
SP
Service Modes, Error Codes, and Fault Finding
From part B
Enable Alive check mechanism
MIPS reads the wake up reason
from standby µP.
Wait for the +8V6 to be detected if not yet present. (if
it does not come, the standby µP will enter a
protection mode, this is not a dead end here)
Start 4 seconds preheating timer in case of
a LPL scanning backlight LCD set.
AVIP needs to be started before the MPIF in order to have a good clock distribution.
AVIP default power-up mode is Standby. The Viper instructs AVIP via I²C to enable all the
PLLs and clocks and hence enter to Full Power mode.
Initialize PNX2015 HD subsystem
MPIFs should be initialized
MPIF should deliver 4 observers:
POR= 0; normal operation
MSUP = 1: Main supply is present
ASUP = 1; audio supply is present
ROK = 1; reference frequency is present (coming from AVIP)
All observers present with correct state?
Initialize tuners and HDMI
Initialize source selection
Initialize video processing ICs
- Spider (if available)
Initialize Columbus
Initialize 3D Combfilter
Initialize AutoTV
Do not enter semi-standby state in case of an LPL
scanning backlight LCD set before 4 s preheating timer has
elapsed.
Semi-Stand-by
Figure 5-5 "Off" to "Semi Stand-by" flowchart (part 3)
Yes
Wait until Viper starts to
Switch "on" the LVDS output of
the PNX2015 with a correct
SDI PDP clock frequency within 4s after
Yes
Set? switching the POD and "on"
mode to prevent PDP display
supply protection.
These LVDS items are
SDI V3 display only !!
No
Send STBYEN = 1
FHP PDP PFCON = 1
Yes
Set? VCCON = 1
to PDP display (I²C)
No
No
Yes
BP2.2U, BP2.3U 5.
From part B
communicate
PWR-OK-PDP
received within 10s
after POD and "on" mode
toggle ?
Yes
Init SDI PDP
Switch LVDS back off if
end state is not the active
state.
Switch PDPGO "low"
Init FHP PDP
Log appropriate
Observer error
EN 19
action holder: MIPS
action holder: St-by
autonomous action
No
Log display
error and enter
protection mode
SP
F_15400_096c.eps
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