Seanix 42PSEA06, Руководство по обслуживанию

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4-2-3 STB POWER Solution process
Note
：
Must distinguish connect Grand point of Power primary and secondary level.
POWER un-moral
No input of +5VSB,or output is unmoral
Test point
： CN903 PIN2
Voltage
：
5V
（
4.9
－
5.1
）
Test AC Input of CN901 ok
or not?
Voltage
： AC 100 V ~ 120 V
/200 V ~ 240 V
Test voltage of C905
is DC300V or not
？
Check FUSE F901,
BD901ok or not
？
Check IC901 and D901
ok or not
？
+5VSB OK
No input of AC Power
out, or output is unmoral
Test point
：
CN902
Voltage: AC INPUT±1V
Do these process
under the state is
+5VSB
PS
－
ON ok or not
？
Test point ： CN903 PIN4
Voltage
：
DC5V
（
High
）
Vccp ok
？
Test pads of C909
Voltage
： DC13V － 25V
Q901, Q902, Q903, Q904,
M902 ok or not
？
AC POWER-OUT OK
Check circuit of
IMAGE BOARD,
and check PS-ON
OK or not?
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG