LC-26GA5E LC-32GA5E
Troubleshooting Table (continued)
No power supply (Front LED is off) and no power-up. (Front LED does not change from red to green)
NO
Is the power supply cord properly connected to the Main unit?
Reconnect the power supply cord and turn on the power.
<Power supply>
Are F701 and F702 normal?
YES
NO
Replace F701 and F702, and then turn on the power. If a fuse still blows, replace VA702, D701 and IC701, and then check again.
YES Is F703 normal?
YES
Is thermal fuse (F704) normal? (117°C specification)
NO
Replace F703 and then turn on the power. If a fuse still blows, replace D763 and IC703, and then check again.
NO
YES
NO
After replacing F704 and rechecking the mounting of D701, D705, Q701, Q702, Q710 and Q711, supply power again. If the fuse burns out again, replace the said parts and recheck.
Are the wire harness, FFC, etc. in the set connected properly?
Reconnect the wire harness, FFC, etc. and check again.
YES
Is a voltage of about 380 V applied to C709 and C710 when power is turned on?
NO
Check the 380V system power supply circuit. (L703, IC701, Q701~5, D705, TH701) Check the power supply circuit of the 13V system. (T701, T702, F704, Q706-14, PC701, PC703-4, D708-17, IC702, L710, Q733-6, D735-6, D771, IC706) Is "H" signal sent to the PS_ON (pin 5 of CN707) line?
YES Is voltage generated at the +13V line (pin 1 of CN706)
immediately after supplying power?
NO
YES
Is +3.3V line (pins 11/12 of CN706) normal immediately after supplying power? Is F1001 (2.5A) of the Main PWB normal? YES Is each REG-IC output normal? (IC708 (4V), IC740 (33V), IC709 (5V), IC713 (12V), Q760 (6V))
NO
Check the power supply circuit of the +3.3V line system. (IC715, L715, T703, IC703, PC701-702) (F1001)
NO
Check each REG-IC and each line.
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