NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
-26-
The audio monitor is not audible.
Is a Speaker (4 ohm) connected?
Connect a Speaker (4 ohm).
Turn the volume up enough?
Go to "MENU 2" and set the level
in OTHERS.
Is the signal present at J13-
No1 in Main PCB for Hull Unit
portion?
MAIN PCB in HULL UNIT portion
SPEAKER
The memory data can not back-up.
Is Battery fully charged in Main
PCB for Monitor portion?
Charge Battery more than 10
hours continuously.
Check with a tester to verify that the audio is connected by
setting it to the AC range and the maximum audio level and
the indicator moves.
MAIN PCB
Can it be back-up short time by
charging?
Replace Battery.
Summary of Contents for S-1800H80/180
Page 44: ...N o 6 8 8 A...
Page 46: ......
Page 48: ......
Page 50: ...NO 748 H SYNC CH1 J15 3pin GND V SYNC CH2 J15 4pin GND...
Page 53: ......
Page 55: ...NO 654 FRQ CH1 FRQ GND P...
Page 64: ......
Page 67: ......
Page 69: ......
Page 70: ...180kHz HULL UNIT CIRCUIT DIAGRAM WAVE FORMS 180 kHz...
Page 73: ......
Page 75: ......
Page 81: ...70V...
Page 83: ...NO 703 CH1 FRQ GND P...
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Page 119: ...HULL UNIT ASSEMBLY DRAWING...