Important Safety Precautions - JVC HR-S10EG Service Manual

Important Safety Precautions
@ Precautions during Servicing
1, Locations requiring special caution are denoted by labels and
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and comply
with these and other cautionary notices appearing in the opera-
tion and service manuals.
—————SS
2. Parts identified by the /\ symbol and shaded (
critical for safety.
Replace only with specified part numbers.
Note: Parts in this category also include those specified to
comply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.
©) parts are
10. Products using cathode ray tubes (CRTs)
In regard to such products, the cathode ray tubes themselves,
the high voltage circuits, and related circuits are specified for
compliance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath-
'ce ray tubes and other parts with only the parts specified.
Under no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value
and cause X-ray emission form the cathode ray tube.
3. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
4. Use specified insulating materials for hazardours live parts. Note
especially:
1) Insulation Tape
2) PVC tubing
3) Spacers
4) Insulation sheets for transistors
5. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of wires
securely about the terminals before soldering.
Fig. 1
B=
6. Observe that wires do not contact heat producing parts (heat-
sinks, oxide metal film resistors, fusible resistors, etc.)
7. Check that replaced wires do not contact sharp edged or pointed
parts.
8. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosent it.
Power cord
Fig. 2
9, Also check areas surrounding repaired locations.
L
11. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer primary lead wires are performed using crimp type
connectors, if replacing the connectors is unavoidable, in order
to prevent safety hazards, perfomr carefully and precisely
according to the following steps.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type
which will not damage insulated parts.
3) Replacement procedure
(1) Remove the old connector by cutting the wires at a point
close to the connector.
Important : Do not reuse a connector (discard it).
aU 6
\ls
"
Cut close to connector
Fig. 3
(2) Strip about 15 mm of the insulation from the ends of the
wires. If the wires are stranded, twist the strands to avoid
frayed conductors.
15mm
Be
Fig. 4
{3) Align the lengths of the wires to be connected. Insert the
wires fully into the connector.
Metal sleeve
Connector
Fig. 5