Philips BP2.2U Service Manual page 24

EN 24 5. BP2.2U, BP2.3U
action holder: MIPS
action holder: St-by
autonomous action
(AVIPs must be started before the MPIFs in order to have a good clock distribution).
AVIP default power-up mode is Stand-by. The Viper instructs AVIP via I2C to enable all the
PLLs and clocks and hence enter to Full Power mode.
Service Modes, Error Codes, and Fault Finding
POD stand by
Switch "on" all supplies by switching "low"
the ON-MODE I/O line.
Full SSB power and the display related supplies
become available
+8V6
detected within
200 ms after ON-MODE
toggle?
Yes
activate +8V6 supply
detection algorithm
Wait 2000ms to allow main supply to
deliver full power.
Enable audio protection algorithm
SDI PDP
Yes
Set?
No
Power-up HDMI and 1394 hardware by putting
POWERDOWN-1394 GPIO 0 line "low".
Enable Viper HW blocks (TM1, TM2, MBS, VMSP1 and
VMSP2) which were in powerdown mode.
Release PNX2015 reset
initialize PNX2015 HD subsystem
Initialize MPIFs
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?
Yes
Initialize tuners and Hirate
Initialize source selection
Initialize video processing ICs
- Spider (if available)
Initialize Columbus
Initialize 3D Combfilter
Initialize AutoTV
Semi-Stand-by
Figure 5-10 "POD Stand-by" to "Semi Stand-by" flowchart
No +8V6 error
SP
Switch "on" the LVDS output
the PNX2015 with a correct
clock frequency within 4s after
received within 5s after
switching the POD and ON-
mode to prevent PDP display
supply protection.
These LVDS items are
SDI V3 display only !!
Switch LVDS back "off" if end
state is not the active state.
No appropriate Observer error
MP
PWR-OK-PDP
No
POD and ONmode
toggle ?
Log display error
and enter
Yes
protection mode
Init SDI PDP
SP
F_15400_101.eps
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