Standby On/Off Problem; No Signal Problem - Sharp LC-22LE240E Service Manual

LC-22LE240

21.9. Standby On/Off Problem

Problem:
Device cannot boot, TV hangs in standby mode.
There may be a problem about power supply. Check 12V_VCC, 5V_VCC and 3V3_VCC
There may be a problem about power supply. Check 12V_VCC, 5V_VCC and 3V3_VCC
with a voltage-meter. Also there may be a problem about SW. Try to update TV with latest SW.
with a voltage-meter. Also there may be a problem about SW. Try to update TV with latest
SW. Additionally it is goood to check SW printouts via hyper-terminal (or Teraterm).
Additionally it is good to check SW printouts via hyper-terminal (or Teraterm).
These printouts may give a clue about the problem.
These printouts may give a clue about the problem.
DVD Problems
Problem: DVD is not working.

21.10. No Signal Problem

Check that DVD source is selected in Service menu. Check supply voltage of DVD
Problem: No signal in TV mode.
namely 12V_VCC.
Check tuner supply voltage; 3V3_TUN. Check tuner options are correctly set in Service
menu. Check AGC voltage at IF_AGC pin of tuner.
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