Philips 26HFL3350D/10 Service Manual page 22

EN 22 5. Q522.2HE LA
No
No
2010-Jun-30
Service Modes, Error Codes, and Fault Finding
Off/Stby to Semi
Off
Mains is applied
Standby Supply starts running.
All standby supply voltages become available .
st-by µP resets
All I/O lines have a High default state:
- Switch PNX8541 in reset (active LOW).
- Keep the Audio-reset high.
- NVM power line is high, no NVM communication possible.
Initialise I/O pins of the st-by µP, start keyboard scanning, RC
detection. Wake up reasons are off.
Switch ON PSU supply by switching LOW the Standby I/O
line.
+12V is switched on
Wait 50ms and then start polling the DETECT 2
every 40ms.
DETECT 2 received within
2900 ms
Yes
activate DETECT 2 algorithm
Enable the supply for
+3V3 and +5V (ENABLE-3V3)
Start polling the detect 1
every 40ms
DETECT 1 = High
within
250 ms after enable - 3V3 toggle?
Yes
Activate DETECT 1 algorithms
Wait 20ms
SUPPLY-FAULT I/O line
is High?
Yes
Enable the supply fault detection
algorithm
Set I²C slave address
of Standby µP to (A0h)
Switch LOW the RESET-NVM_WP-NANDFLASH line. Add a 2ms delay
before trying to address the NVM to allow correct NVM initialization.
Detect EJTAG debug probe
(pulling pin of the probe interface to
ground by inserting EJTAG probe)
EJTAG probe
connected ?
No
No Cold boot?
Yes
Release AVC system reset Release AVC system reset
Feed warm boot script Feed cold boot script
Figure 5-4 "Off" to "Semi Stand-by" flowchart (part 1)
Stand by or
Protection
If the protection state was left by short circuiting the
SDM pins, detection of a protection condition during
startup will stall the startup. Protection conditions in a
playing set will be ignored. The protection mode will
not be entered.
- Switch Audio-Reset high.
It is low in the standby mode if the standby
mode lasted longer than 10s.
No 12V supply" error 6
SP
No Supply Fault = High? Yes
No
Standby line set to HIGH for 5
seconds
No Detect 1 = High? Yes
No
Standby line set to HIGH for 5
seconds
This will allow access to NVM and
NAND FLASH and can not be done
earlier because the FLASH needs to
be in Write Protect as long as the
supplies are not available .
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
Restart
Voltage output error: 8
SP
Supply fault error 9
SP
I_18010_069a.eps
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