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2-1. Notes on Power Supply Block
2-1-1. Warning on Primary Circuit and
Electric Shock
The power supply block consists of the AC-139 board and
primary peripheral components. The whole AC-139 board
is on the primary side circuit, so pay careful attention to the
electric shock. Since the inside of a switching regulator is
also on the primary side circuit, treat it with care.
2-1-2. Notes on Resetting the Circuit
Breaker
When the breaker on the power supply panel is activated
and the button is ejected, remove the cause of the trouble,
then push the button.
Section 2
Service Overview
2-2. Removal/Installation of Cabinet
2-2-1. Cabinet Removal/Installation
c
Always switch off the POWER before removing and
installing cabinet.
Upper Control Panel
1. Remove the upper lid.
2. Remove the control knob on the upper control panel.
3. Remove the each one screw on the left and right sides.
4. Fingers should be inserted in the space between the
upper control panel and chassis, and remove the upper
control panel as shown in the figure A.
Screw
(BVTT3x6)
Control knob
5. When installing, insert the projections of the upper control
panel into the holes of the chassis, then fix the panel with
the screws as shown in the figure B.
Screw
(BVTT3x6)
Projection
Upper control panel
Upper control panel
<Fig. A>
Chassis
Projection
<Fig. B>
Screw
(BVTT3x6)
Screw
(BVTT3x6)
2-1
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