Philips BJ3.1E LA Service Manual page 30

EN 30 5. BJ3.1E LA
(AVIP's need to be started before the MPIF's 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
PLL's and clocks and hence enter to Full Power mode.
MPIF's 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)
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
2000 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
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
All observers present with correct state?
Yes
Initialize tuners and Hirate
Initialize source selection
Initialize video processing IC's
- Spider
Initialize Columbus
Initialize 3D Combfilter
Initialize AutoTV
Semi-Standby
Figure 5-13 "POD Stand-by" to "Semi stand-by" flowchart
No +8V6 error
action holder: MIPS
SP
action holder: St-by
autonomous action
No appropriate Observer error
MP
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