Service Procedures - Onkyo DX-C909 Service Manual

DX-C909
DX-C606
SERVICE PROCEDURES
l. Safety-check out
After correcting the original service problem,perform
the following safety check before releasing the set
to the customer:
Connect the insulating-resistance tester between the
plug of power supply cord and chassis.
Specifications:More than 10Mohm at SOOV.
. Voltage Selector (Back panel)
Worldwide models are equipped with a voltage selector
to conform with local power supplies.Be sure to set
this switch to match the voltage of the power supply
in users area before turning the power switch on.
Voltage is changed by sliding the groove in the switch
with a screw driver to the right or left.
220V ~ 120V ~ 220V ~ 120V ~
at AC120V at AC220V
or its reliability remarkably deteriorated.
PRECAUTIONS
1.Ground for the work-desk.
3.Grounding for the human body.
Place a conductive sheet such as a sheet of copper Be sure to put on a wnst-strap for grounding whose
(with inpedance lower than 10M'{2) on the work- other end ts grounded.
desk and place the set on the conductive sheet so Be particularly careful when the workers wear
that the chassis. synthetic fiber clothes, or air 1s dry.
2.Grounding for the test equipment and tools. 4.Select a soldering iron that permits no leakage and
Test equipments and toolings should be grounded have the up of the iron well-grounded.
in order that their ground level is the same the 5.Do not check the laser diode terminals with the
pround of the power source. probe of a circuit tester or oscilloscope.