Philips Q552.2E Service Manual page 27

H : 0000 000X (number of hardware events : SW EVENT-
LOG #(events).
How to Exit CSM
Press "MENU" (or "HOME") / "Back" key on the RC-transmitter.
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
Service Modes, Error Codes, and Fault Finding
Mains
off
- WakeUp requested
- Acquisition needed
- Tact switch pushed
St by
- stby requested and
no data Acquisition
required
Tact switch
- Tact switch pushed
- last status is hibernate
after mains ON
Hibernate
Figure 5-3 Transition diagram
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
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.
Mains
on
Semi
St by
pushed
GoToProtection
back to
div. table
Q552.2E LA 5.
WakeUp
requested
Active
- St by requested
- tact SW pushed
WakeUp
requested
(SDM)
GoToProtection
Protection
18770_250_100216.eps
EN 27
100402
2011-Jun-01