Chapter 7. Troubleshooting Table Troubleshooting Table - Sharp LC-32LE150M Service Manual

LC-32LE150M
CHAPTER 7.
TROUBLESHOOTING
TABLE
[1] TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
No power (front LED failure to light up) or no startup (front LED failure to turn from red to green)
Is the AC cord connector tightly connected to the set?
Are the wire harnesses and other cables properly connected in
the set?
Are the DC/DC converter outputs and the output voltages along
the control lines as specified?
1) D+5.0V (IC9601)
2) D+3.3V ( IC9602)
3) D+1.26 V (I C9604)
4) D+3.3V (IC9603)
5) D+1.8V (IC9606)
6) D+2.5 (IC9608)
Is there 7.5V from IC9605 & IC9603
Replace IC3301
YES
YES
YES
YES
NO Reconnect the AC cord tightly and turn on the power again.
NO Reconnect the wire harnesses and other cables properly in the
set.
NO Check the DC/DC converters and the control lines. Replace
defective parts as required.
NO Check the AC_CTRL Line (90) of IC3301 , IC3101,X 3301
crystal oscillation
7 – 1