Suzuki S-1800M10 Technical Manual page 32

Adjust the voltage, 85V 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 85V and GND-1 check pins and adjust VR2 so that the voltage is 85.0V, 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 85V and GND-1 check pins and the Dummy Load between the J3-No.4 (85V) and
No.3 (GND).
And adjust VR4 voltage rate that starts to degrease at 275Ω and keeps it not to degrease at 290Ω.
※85V on the No.703 is designed to reduce the voltage when overloaded. 85V is output constantly when
minimum loading. However carefully measure the changeable voltage on loading.
Verify the voltage by changing Power Reduction Control (TX POWER) as follows.
TX POWER
C
B
A
The value of frequency counter is 115.0 kHz.
8.69μsec（115.0 kHz）
Voltage (V)
61±3.0V
38±3.8V
22±5.0V
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