the unfinished or rough edge of a part.
7. When replacing the power cord (except for the plug-in type), tug it
from various directions to confirm that it does not slip out of place.
8. Spacing
If soldering was done on the AC primary circuit, confirm that the
interval between the soldered terminals or between the terminal
and surrounding metallic parts is at least the minimum required
(between the primary circuit and the chassis: atleast 6.5 mm;
between primary circuit terminals: at least 4.0 mm; between
primary circuit terminals and secondary circuit terminals: at least
6.5 mm.).
2. SAFETY PRECAUTION
2.1. Safety precaution
1. Before servicing, unplug the power cord to prevent an electric
shock.
2. When replacing parts, use only the manufacturer’s recommended
components for safety.
3. Check the condition of the power cord. Replace if wear or damage
is evident.
4. After servicing, be sure to restore the lead dress, insulation
barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure
to make the following insulation resistance test to prevent the
customer from being exposed to a shock hazard.
2.2. Insulation resistance test
1. Unplug the power cord and short the prongs of the plug with a
jumper wire.
2. Turn on the power switch.
3. Measure the resistance value with an ohmmeter between the
jumpered AC plug and each exposed metal cabinet part, such as
screw heads, connectors, control shafts, handle brackets, etc.
Measurements should range from 4 M Ohm to infinity for
5
To Next Page
Loading...
Need help?
General
