Service Modes, Error Codes, and Fault Finding
5.
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 pins 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. Important to know is, that if e.g.
the 3V3 detection fails and thus error layer 2 = 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 7U08 is done, you can destroy all IC’s
supplied by the +3V3, due to overvoltage (12V on 3V3-line). It
is recommended to measure first the FET 7U08 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
S
tand-by
P
rocessor.
•
MP: protection or error detected by the MIPS
M
ain
P
rocessor.
Figure 5-3 Transition diagram
Active
S
emi
S
t
b
y
S
t
b
y
M
a
in
s
on
M
a
in
s
off
GoToProtection
- W
a
keUp re
qu
e
s
ted
- Ac
qu
i
s
ition needed
- No d
a
t
a
Ac
qu
i
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ition
re
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ired
- t
a
ct
S
W p
us
hed
- l
as
t
s
t
a
t
us
i
s
hi
b
ern
a
te
a
fter m
a
in
s
ON
-
S
t
b
y re
qu
e
s
ted
- t
a
ct
S
W p
us
hed
W
a
keUp
re
qu
e
s
ted
Protection
W
a
keUp
re
qu
e
s
ted
(
S
DM)
GoToProtection
Hi
b
ern
a
te
- T
a
ct
s
witch P
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- l
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t
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t
a
t
us
i
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ern
a
te
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fter m
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T
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ct
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