Service Procedure; Precautions; Replacing The Fuse - Onkyo TX-8020B Service Manual

SERVICE PROCEDURE

PRECAUTIONS

1. Ground for the work-desk.
Place a conductive sheet such as a sheet of copper (with impedance lower than 10Mohm) on the work-desk and place the set on
the conductive sheet so that the chassis.
2. Grounding for the test equipments and tools.
Test equipments and toolings should be grounded in order that their ground level is the same the ground of the power source.
3. Grounding for the human body.
Be sure to put on a wrist-strap for grounding whose other end is grounded.
Be particularly careful when the workers wear synthetic fiber clothes, or air is dry.
4. Select a soldering iron that permits no leakage and have the tip of the iron well-grounded.
5. Do not check the laser diode terminals with the probe of a circuit tester or oscilloscope.

REPLACING THE FUSE

This symbol located near the fuses indicates that the
fuse used is fast operating type. For continued protection
against fire hazard, replace with same type fuse. For
fuse rating refer to the marking adjacent to the symbol.
Ce symbole indique que le fusible utlise est a rapide.
Pour une protection permanente, n'untiliser que fusibles
de meme type. Ce darnier est la qu le present symbol
est appse.
To initialize the unit
Refer to "Initial setting for shipping" on "OPERATION CHECK-2".
To check version of each Firmware
Refer to "Version confirmation" on "OPERATION CHECK-1".
This symbol located near the fuses indicates that the
fuse used is slow operating type. For continued protec-
tion against fire hazard, replace with same type fuse. For
fuse rating refer to the marking adjacent to the symbol.
Ce symbole indique que le fusible utlise est
une protection permanente, n'untiliser que fusibles de
meme type. Ce darnier est la qu le present symbol est
appse.
TX-8020
e lent . Pour