Furuno CH-270, Service Manual

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3) Soundome Raising Check
START
Press UP arrow key.
Up LED blinks and then lights?
END
Yes
No
Yes
Yes
No
#2 of J2 on CPU board is Low
DSP board is faulty.
Check fuse F1.
OK?
Check motor for
short circuit.
Measure voltage at collector of Q1
on DRV board 06P0154.
10.8V to 15.6V for 12V set and
21.6V to 31.2V for 24VDC set?
10.8V to 15.6V for 12V set and
21.6V to 31.2V for 24VDC set?
Measure voltage across the motor
lead wires.
Motor is faulty.
Relay K1 or limit
switch S2 is faulty.
Problem is cleared by
changing F1?
No
Yes
END
Yes
Yes
No
No
U9, U7 or Q1 on
06P0154 is faulty.
CPU