Akai LTA-26C904 Service Manual page 35

(3) RF inputting color bar signal, I²C bus clock signal SDA, pin 2, 3 of U31, pin 5 of U16, pin 40
of U35, pin 57 of U4, pin 39 of U30, pin 58 of U1, pin 5 of tuner U15:
(4)RF inputting grey signal, Composite Video Signal waveform at pin 14 of tuner U15, the
waveform at pin 169 of U1（SVP-CX32LF） is alike:
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