Service Modes, Error Codes, and Fault Finding
5.
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
S
tand-by
P
rocessor.
•
MP: protection or error detected by the MIPS
M
ain
P
rocessor.
Figure 5-3 Transition diagram
1
8
440_215_090227.ep
s
270209
Active
Semi
St by
St by
Mains
on
Mains
off
GoToProtection
- WakeUp requested
- Acquisition needed
- Tact switch pushed
- stby requested and
no data Acquisition
required
- St by requested
- tact SW pushed
WakeUp
requested
Protection
WakeUp
requested
(SDM)
GoToProtection
Hibernate
- Tact switch pushed
- last status is hibernate
after mains ON
Tact switch
pushed