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A) DEAD or STAND BY
First confirm the AC power supply
mains switch is OK. And then check
RED LED is ON
Check if +5V Supply from PSU is
normal.
Then check regulator voltage
N451=1.26V,N452=3.3V.
Check all working Voltages are
coming at micon STAR182VG,Flash IC
N602. Checkthe Flash SW loading is
normal.
If all the working conditions are
normal, but still can not power ON
the set, then please try to change the
Main Chassis
8. Troubleshooting
Abnormal
Normal
Normal
Normal
Normal
1.) Check the 5V_STB has +5V or not. If OK,
then check main chassis.
2.) If 5V_STB not OK pull out the 5V_STB
conn. From chassis. Then check 5V_STB
supply on main PSU. If OK, then problem in
main chassis. If still abnormal, then Mains
PSU Problem.
Abnormal
Abnormal
Abnormal
48
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