Showa 5683, Operation Manual

Page: 52 / 68

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7.2 How to Replace Fuse
Follow the following fuse replacement procedure.
1.Turn the power switch to off, and then disconnect input and output cables from the amplifier
unit.
2.As shown in Fig.7-2, place the amplifier unit so that the front of the unit to be left side, bottom of
the unit to be in the front, and the rear of the unit to be right side.
3.Use a flat-blade screw driver and turn the fuses to the arrow directions mentioned on the fuse
holders. (See Fig.7-3, counter-clockwise)
4.Replace the fuses at the front part of the fuse holders.
5.The fuse ratings are: 100 VAC and 100 mA for AC power fuse and 12 VDC and 500 mA
time-lag fuse (slow blowing) for DC power supply fuse. When replacing, be careful of AC and
DC.
6.When installing fuse holder, use a flat-blade screw driver. When pushing the fuse, keep the
fuse holder slit to be vertical to the amplifier unit (Fig.7-5, dotted line), and then press deeply
and turn clockwise by 90 degree.
7.Confirm that the fuse holder is fully installed in the amplifier unit as Fig.7-2. Also, confirm that
the fuse holder slit (flat-blade screw driver contact portion) is parallel to the amplifier unit.
8.The fuse replacement is completed. Examine why the fuse was brown. After taking measures,
turn on the amplifier.
FUSE FUSE
Front panel
Fuse for AC Power
Fuse for DC Power
FUSE
Fig.7-4
Fig.7-5
Fig.7-3
Fig.7-2
-Power cord and input/output cable should be
disconnected
from the amplifier unit.
-Rated and specified fuse should be used.
WARNING