Philips 32PFL3904H/12 Service Manual page 17

5.3 Step by step 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 short cutting the pins on the SSB, the TV starts up
until it reaches the situation just before protection. So, this is a
kind of automatic step by step start-up. In combination with the
start-up diagrams below, it is shown which supplies are present
at a certain moment. Important to know is, that if e.g. the 3V3
detection fails and thus layer 2 error = 18 is blinking while the
TV is restarted via SDM, the Stand-by Processor will enable
the 3V3, but the TV set will not go to protection now. The TV
will stay in this situation until it is reset (Mains/AC Power supply
interrupted).
Caution: in case the start-up in this mode with a faulty FET
7101-1 is done, all ICs supplied by the +3V3 could be
destroyed, due to over voltage (12V on 3V3-line). It is
recommended to measure first the FET 7101-1 or others FETs
on short-circuit 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.
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
pushed
- Tact switch pushed
- last status is hibernate
after mains ON
Hibernate
Figure 5-3 Transition diagram
Q543.1E LA
Mains
on
WakeUp
requested
Semi
St by
- St by requested
- tact SW pushed
WakeUp
requested
(SDM)
GoToProtection
Protection
5. EN 17
Active
GoToProtection
18440_215_090227.eps
091118
2009-Nov-20