Philips 32PFL5405H/05 Service Manual page 26

EN 26 5. Q552.1E LA
5.3 Stepwise Start-up
When the TV is in a protection state due to an error detected by
stand-by software (error blinking is displayed) and SDM is
activated via shortcutting the SDM solder path on the SSB, the
TV starts up until it reaches the situation just before protection.
So, this is a kind of automatic stepwise start-up. In combination
with the start-up diagrams below, you can see which supplies
are present at a certain moment. Caution: in case the start-up
in this mode with a faulty FET 7U0X is done, you can destroy
all IC's supplied by the +1V8 and +1v1, due to overvoltage (12V
on XVX-line). It is recommended to measure first the FET
St by
Hibernate
2010-Feb-19
Service Modes, Error Codes, and Fault Finding
Mains
off
Mains
- WakeUp requested
- Acquisition needed
- Tact switch pushed
- stby requested and
no data Acquisition
required
Tact switch
pushed
- Tact switch pushed
- last status is hibernate
after mains ON
Figure 5-3 Transition diagram
back to
div. table
7U0X or others FET's on shortcircuit before activating SDM via
the service pads.
The abbreviations "SP" and "MP" in the figures stand for:
• SP: protection or error detected by the Stand-by
Processor.
• MP: protection or error detected by the MIPS Main
Processor.
on
WakeUp
requested
Semi
St by
- St by requested
- tact SW pushed
WakeUp
requested
(SDM)
GoToProtection
Protection
Active
GoToProtection
18770_250_100216.eps
100216