Repair Flow Chart - TCL L22E75BK Service Manual

22 " LCD TV

5. Repair Flow Chart

5.1 No Power (No LED indicator)
Check AC line volt 110V or 220V
Check the voltage of C905 (+)
Check start voltage for the pin8 of IC901
Check the auxiliary voltage pin1 of IC901 is
10V and smaller than 20V
Check IC901 pin6 PWM wave
Check D909/R939/R938/R914/D906/D904/IC903/IC902
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
TCL L22E75BK
Check AC input
Check bridge rectified circuit and F901 circuit
Check R904, R932, R933
1) Check IC901
2) CheckT901, ZD905, D902circuit
Check IC901
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