Suzuki S-1800H80/180, Technical Manual

Page: 16 / 123

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* DUMMY RESISTANCE * OUTPUT WAVEFORM （Transducer−GND）
120Ω／0.0057μＦ 160Ω／375μH
（180kHz） （80kHz） 180kHz：500Vp-p
(or 600Vp-p in case Power Supply PCB-85V)
80kHz：535Vp-p
(or 650Vp-p in case Power Supply PCB-85V)
Use the over 10W and 1.5kV pressure-resistant dummy resistance.
Use the dummy resistance just for the confirmation of the output waveform.
Do not flow the current for a long time. Otherwise it will cause fire.
-15-
Only the surface echo is displayed.
The sensitivity is poor.
The picture does not change even if the Gain or Far Gain Control dial is turned.
Set TX POWER D in
FUNCTION SET, MENU2.
Is TX POWER D set?
Reset TVG curve setting in
FUNCTION SET, MENU2.
Is TVG CURVE setting changed
from the user setting?
Does Picture Display on the
screen change by turning
Gain/Far Gain Control dial?
TR PCB J1-No.2: 12V & J1-No.5: 70V
(or 85Volt in case Power Supply PCB-85V)
Are the output waveforms are normal?
Are the output waveforms
normal when replacing
Transducer with Dummy?
*
* To be continued to the next page.
Hull Unit portion
Power Supply PCB
Soundome TR PCB