Philips P&S 22HFL4372D/10 Service Manual page 16

EN 16 5. Q552.1HE LA
5.2.4 Hotel mode
Notes: (only applicable to xxHFLxxxxX/nn)
• Refer to the user manual for more information on the hotel
mode.
• When in the hotel mode, the service modes CSM, SDM,
SAM and ComPair are automatically disabled (this is to
prevent hotel guests entering Philips service modes).
• In order to use the service modes and ComPair, hotel
mode must be disabled.
• To enable the hotel mode, Press the following key
sequence on the remote control transmitter: "3 1 9 7 5 3
MUTE".
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
2010-Nov-19
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 5-8 Transition diagram
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
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
WakeUp
requested
Active
- St by requested
- tact SW pushed
WakeUp
requested
(SDM)
GoToProtection
Protection
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