2-1 (E)
MAV-70
Section 2
Service Overview
2-1. Circuit Protection Device
The circuit protection device (positive thermistor) is
mounted on the MB-755 board.
If overcurrent flows through the circuit when the power is
provided from the switching regulator to each HDD unit,
or the ambient temperature of the device rises, the internal
resistance of the device will increase suddenly. This limits
the current flowing through the circuit.
When the circuit protection device operates, turn off the
power and check the circuit to eliminate the cause of the
overcurrent. After waiting for the device to cool off, turn
on the power again. The circuit protection device will be
reset automatically.
2-2. Filter Cleaning
A filter is provided at two locations of the unit-one at the
back of front panel A and the other at the back of the front
panel (lower).
Accumulation of dirt on the filter blocks ventilation will be
cause of the heat to build up inside the unit. This may
shorten the life of the unit.
Therefore periodic cleaning of the filter is recommended.
n
For details of filter replacement, refer to MAV-70 mainte-
nance manual.
Cleaning
1.
Remove the ornamental panel A (Refer to section 1-7).
2.
Open the front panel A (Refer to section 1-8).
3.
Vacuum the dust accumulated on the filter with a
vacuum cleaner.
4.
Remove the front panel (lower) (Refer to section 1-6).
5.
Vacuum the dust accumulated on the filter with the
vacuum cleaner.
6.
Install the front panel (lower), front panel A, and
ornamental panel A.
Filter
Filter
Front panel A
Front panel (lower)
2-3. Fan Motor Replacement
When “Err” (illegal status) is generated on the status of the
fan motor in the menu “Service : Device”, replace the fan
motor unit or a failed fan motor.
This section describes the replacement procedures of the
fan motor unit.
For the replacement procedures of the fan motor, refer to
the maintenance manual.
>Exit
Service : Device
Device
Fan Unit Upper 1
Fan Unit Upper 2
STS Hours (h)
Err
3200
Rdy 2400