Philips MG8 Service Manual page 22

EN 22 5. Q522.2E LA
No
Switch AVC PNX8541
in reset (active low)
Wait 10ms
Switch the NVM reset
line HIGH.
Disable all supply related protections and
switch off the +2V5, +3V3 DC/DC converter.
switch off the remaining DC/DC
converters
Switch Standby
3-th try?
I/O line high.
Yes
Blink Code as
error code
SP
No
Channel decoder
TDA 10048?
- Channeldecoder type TDA10048
can be reloaded without reset .
Log channel decoder error
Service Modes, Error Codes, and Fault Finding
No
Release AVC system reset
Feed warm boot script
No
No
Code = 5
No
Code = 53
Start 4 seconds preheating timer in case of
Wait 5ms
an LPL scanning backlight LCD set .
Yes
No
Initialize tuner , Master IF and channel
No
Third try?
Wait until Cpipe delivers a stable output
Yes
Initialize AutoTV by triggering CHS AutoTV Init interface
Do not enter Semi --Standby state in case of an LPL
scanning backlight LCD set before 4s preheating timer has
elapsed.
Figure 5-5 "Off" to "Semi Stand-by" flowchart (part 2)
(pulling pin of the probe interface to
ground by inserting EJTAG probe)
EJTAG probe
connected ?
No
Cold boot?
Yes
Release AVC system reset
Feed cold boot script
Bootscript ready
in 1250 ms?
Yes
Set I²C slave address
of Standby µP to (60h)
RPC start (comm. protocol)
Flash to RAM image
transfer succeeded
within 30s?
Yes
SW initialization
succeeded
within 20s?
Yes
Enable Alive check mechanism
MIPS reads the wake up reason
from standby µP.
Initialize audio
Download firmware into the channel
decoder
Downloaded
successfully ?
Yes
decoder
Initialize source selection
clock
.
Semi-Standby
An EJTAG probe (e.g. WindPower ICE probe) can
be connected for Linux Kernel debugging purposes.
Yes
Release AVC system reset
Feed initializing boot script
disable alive mechanism
Wait until AVC starts to
communicate
Important remark :
Input vertical frequency
changes (48/50/60Hz)
detected during startup
sequence should not be
taken into account . The
end situation should
always be safeguarded .
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