6-1
6. MAINTENANCE AND INSPECTION
The performance and longevity of this equipment depend on careful maintenance. To maintain
the best performance, the following periodic inspections are highly recommended.
(1) Keep the power supply voltage within the specified value.
(2) Know the condition of normal status when the equipment is properly functioning. Keep
comparing the current status to the normal status to immediately detect any malfunctions.
With the exception of qualified service personnel, do not attempt to service the
interior of this equipment, as doing so may cause fire, electric shock or malfunction.
Each internal circuit has been fine-tuned, therefore be sure not to tune or modify
without measuring instruments. If any malfunctions are detected, contact our
service center or agents.
6. 1 General Maintenance and Inspection
Below are listed general maintaining and inspecting items which can be done with usual tools and
apparatus.
No. Item Maintenance and inspection
1 Cleaning
Gently clean the surface of the panel, knobs, switches, and upper/bottom
cover with a soft cloth or silicon oil.
Remove dust in the unit using a brush or vacuum cleaner. No oil is needed
because this unit has no moving mechanisms inside.
2
Looseness
of parts
Inspect for looseness and correctly tighten the following:
screws, nuts, knobs, switches, volume pots, connectors and relays inserted
into sockets.
3 Fuse
If the power source fuse is blown, be sure to inspect the cause before
replacing the blown fuse with a new one.
4 PCB Unit
Remove screws mounting the unit, demount the unit from the main chassis,
and inspect the unit for discoloration and parching of components. To
exchange parts, call our service center or agents.
6. 2 Maintenance Menu
About self-diagnostics and monitoring system status, please refer to “5.3.7 Maintenance Menu”
WARNING
If you remove the PCB unit, be sure to store it in a non-conductive bag.
If you wrap it up with materials such as aluminum, the buck-up power supply may
short
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