Suzuki S-1800M10 Technical Manual page 17

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Does voltage at J2-No.3
change when Gain/Far Gain
Control dial are turned?
Are the waveforms seen between
J6-No.1 and No.8 in Main PCB for
NO
Hull Unit portion when Gain 0 and
Far Gain 10 are selected?
Are the waveforms of check pin
(CP) B normal?
Does the waveform at J3-No.3
in Main PCB for Hull Unit
change when Gain/Far Gain dial
are turned?
Hull Unit portion
YES
YES
YES
YES
Main PCB
NO Monitor portion
Control PCB
0Volt is present when Gain 0 is selected.
5Volt is present when Gain 10 is selected.
NO
NO
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TR PCB