Trouble Shooting Chart - Toshiba CN27E90 Technical Training Manual

14. TROUBLE SHOOTING CHART

(1) TV DOES NOT TURNED ON
TV does not turned on.
Relay sound
Check of voltage at pin 7 of QA01
8MHz oscillation waveform
at pin 32 of QA01.
Pulse output at pins 37 and 38 of QA01.
Check relay driving circuit.
YES
NO
(DC 5V).
OK
OK
OK
NG
Check power circuit.
NG
Check OSC circuit.
Replace QA01.
NG
Voltage check at pin 32 of QA01
(DC 5V)
OK
Replace QA01.
38
NG
Check reset circuit.