Suzuki S-1800M10 Technical Manual page 33

Adjust the voltage, 70V on the Power Supply PCB (No.703) for S-1800 Hull Unit
（Reckless adjustment may cause serious problem.）
Connect the digital tester to the 15V and GND-1 check pins and adjust VR3 so that the voltage is 15.0V.
Connect the digital tester to the 70V and GND-1 check pins and adjust VR2 so that the voltage is 70.0V, when J3
connector is not connected.
Connect the digital tester to the 12V and GND-1 check pins and verify the voltage is 12.0±0.6V.
Connect the digital tester to the 5V-1 and GND-1 check pins and verify the voltage is 5.0±0.25V.
Connect the digital tester to the 5V-2 and GND-2 check pins and verify the voltage is 5.0±0.25V.
Connect the oscilloscope to the FRQ and GND-P check pins and adjust the waveforms at VR1 so that the below
is shown.
Connect the oscilloscope to the 70V and GND-1 check pins and the Dummy Load between the J3-No.4 (70V) and
No.3 (GND).
And adjust VR4 voltage rate that starts to degrease at 150Ω and keeps it not to degrease at 160Ω.
Reference: Power Reduction Control (TX POWER)
TX POWER
The value of frequency counter is 115.0 kHz.
8.69μsec（115.0 kHz）
Voltage (V)
C
50V± 5％（approx.47〜53V）
B
31V±10％（approx.28〜34V）
A
21V±20％（approx.16〜25V）
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