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Akai 29CTF05BS Service Manual page 39

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29CTF05BS
Snow noise
increase
Does 5V appear
at pin 7 of TU 51 ?
Does 31V appear
at pin 9 of TU 51 ?
Check TU 51
Does the snow noise
appear on the screen at
YES
maximum contrast and
brightness ?
NO
Check the PC+5V line.
YES
Check +120V line and
its related circuit.
YES
NO PICTURE
NO
4 – 4
A

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