Toshiba TW40F80 - Manual (Page 32)

32
14-2. No Acception of KEY-IN
14-3. No Picture (Snow Noise)
NG
OK
No picture
Voltage at pins of +5V, and 32V.
Check H001. Check tuner power circuit.
Key on TV
Voltage change at pins 17, 18 of
QA01 (5V to 0V).
Replace QA01.
Check key-in circuit.
NG
OK
NG
OK
Remote unit key
Pulse input at pin 35 of QA01,
When remote unit key is pressed.
Replace QA01 Check tuner power circuit.