LC-40/46LE830E, RU/831E, S
6 – 1
LC-40LE830E
Service Manual
CHAPTER 6.
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
No power (Central Icon LED failure to light up) or No startup (Central Icon LED is flashing)
Is the AC cord connector tightly connected to the set?
NO
Reconnect the AC cord tightly and turn on the power again.
YES
Are the wire harnesses and other cables properly connected to
the set?
NO
Reconnect the wire harnesses and other cables properly to the
set.
YES
Is power supplied from pins [9/BU+5V] of [PD] P9602?
NO
Replace the power unit.
YES
Is there the pins [12/PS_ON] of [PD] P9602 at “H”?
NO
Check the signal line between PS_ON and IC2001 (UCOM)/
IC3303 (Digital AV decode & Main CPU).
YES
Is there the pins [11/AC_DET] of [PD] P9602 at “H”?
NO
Check the power unit, and the signal line between AC_DET and
IC2001/IC3303.
YES
Is power supplied from pins [17~20/UR+13V] of [PD] P9602 as
specified?
NO
Check the line between PS_ON and IC2001/IC3303.
YES
Are the DC/DC converter outputs and the output voltages along
the control lines as specified?
NO
Check the DC/DC converters and the control lines.
Replace defective parts as required.
1) BU3.3V (IC9609 etc.)
2) D5.6V (IC9608 etc.)
3) D5V (IC9603 etc.)
4) U5V (IC9602 etc.)
5) D3.3V (IC9605 etc.)
6) M1.8V (IC9607 etc.)
7) D1.5V (IC9604 etc.)
8) D1.2V (IC1509 etc.)
9) D1.1V (IC9606 etc.)
10)AT5V (IC1104 etc.)
11)IF1.8V (IC1109 etc.)
12)SAT+1.2V (IC1102 etc.)
13)STB+3.3V (Q9607 etc.)
14)SD3.3V (IC8456 etc.)
15)CPU_A+1.2V (IC3301 etc.)
16)CIIN+5V (IC4403 etc.)
17)1.1V (IC4401 etc.)
