GSIB660 datasheet(4/70 Pages) TOSHIBA

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1-2 Servicing Precautions

1. Servicing precautions are printed on the

cabinet. Follow them.

2. Always unplug the unit’s AC power cord from

the AC power source before attempting to:

(a) Remove or reinstall any component or

assembly, (b) Disconnect an electrical plug or

connector, (c) Connect a test component in

parallel with an electrolytic capacitor.

3. Some components are raised above the printed

circuit board for safety. An insulation tube or

tape is sometimes used. The internal wiring is

sometimes clamped to prevent contact with

thermally hot components. Reinstall all such

elements to their original position.

4. After servicing, always check that the screws,

components and wiring have been correctly

reinstalled. Make sure that the portion around

the serviced part has not been damaged.

5. Check the insulation between the blades of the

AC plug and accessible conductive parts

(examples: metal panels, input terminals and

earphone jacks).

6. Insulation Checking Procedure: Disconnect the

power cord from the AC source and turn the

power switch ON. Connect an insulation

resistance meter (500V) to the blades of the AC

plug.

The insulation resistance between each blade

of the AC plug and accessible conductive parts

(see above) should be greater than 1 megohm.

7. Never defeat any of the B+ voltage interlocks.

Do not apply AC power to the unit (or any of

its assemblies) unless all solid-state heat sinks

are correctly installed.

8. Always connect a test instrument’s ground

lead to the instrument chassis ground before

connecting the positive lead; always remove

the instrument’s ground lead last.

Precautions

1-3

Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between

the servicing and safety precautions, always follow the safety precautions.

Warning2: An electrolytic capacitor installed with the wrong polarity might explode.

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