Sharp 9Q-FG1A - Page 22

29Q-FG1A/1F/1N/1S/1U
4 – 4
NO PICTURE
Does the snow noise
appear on the screen at
maximum contrast and
brightness ?
Snow noise
increase
Does 5V appear
at pin 7 of TU 251 ?
Does 31V appear
at pin 9 of TU 251 ?
Check TU 251
Check the PC+5V line.
Check +120V line and
its related circuit.
YES
YES
YES
NO
NO
A
NO