Showa 5683, Operation Manual

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CAUTION IN HANDLING
Read this manual carefully before using the amplifier.
1. Do not apply neither voltage nor current to the output terminal of this amplifier from external
source.
2. Use this amplifier with power supply voltages from 85 VAC to 132 VAC, 180 VAC to 264 VAC,
or 10 VDC to 30 VDC. The AC power supply selection switch is provided inside the chassis. To
switch the AC power supply voltage, refer to page 7-4. If the power fuse is burnt, check the
cause of fuse blow-out. To replace the fuse, always disconnect the power plug and input/output
signal cable first, and then replace the fuse in the fuse holder. For how to replace fuse, see
page 7-3. When replacing, examine the ratings of fuse (e.g. for AC or DC).
3. The operation temperature and humidity of the input units is –10 to 50
°
C and 20 to 85%,
respectively. If opening the package in a warm room during the cold season, open the
package after it has reached room temperature to avoid any operational failure due to
condensation on the surface of the product.
Do not use this instrument at the following locations.
- High-humidity locations
- Locations with direct sunlight exposure
- In the vicinity of high-temperature heat source
- Location with vibrations
- Locations where salt, water, oil, or corrosive gases exist
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. When using many amplifier units, install fan units.
5. When a case is used to accommodate amplifiers, the case must be grounded.
6. This product uses a flash memory for saving setup values. Replacement of battery is not
needed accordingly.
7. As Models 5683/5684 have AC signal bridge voltage. Amplifier unit whose bridge voltage
frequency differs cannot be used in the same case. In addition, when using several units
closely, always make synchronization. Otherwise, noises may be generated. See 3-8 and 3-9
for details.
8.This amplifier unit uses rotary encoders are used for knobs to control functions. However,
indication position of the knob sometimes stays at the position between scale markings. In such
case, the settings upon power-up may differ from those upon turning off the amplifier. To avoid
such event, it is recommended to allow knob indication to be at the correct scale marking
position.