Important Safety Precautions
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the
countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions
when a set is being serviced.
Precautions during Servicing
Y
1. Locations requiring special caution are denoted by labels and in-12. Crimp type wire connector
scriptions on the cabinet, chassis and certain parts of the product.In such cases as when replacing the power transformer in sets
When performing service, be sure to read and comply with thesewhere the connections between the power cord and power trans-
and other cautionary notices appearing in the operation and serv-former primary lead wires are performed using crimp type connec-
ice manuals.tors, if replacing the connectors is unavoidable, in order to prevent
safety hazards, perform carefully and precisely according to the
2. Parts identified by the ! symbol and shaded ( ) parts arefollowing steps.
critical for safety.
Replace only with specified part numbers.1) Connector part number : E03830-001
Note: Parts in this category also include those specified to com-2) Required tool : Connector crimping tool of the proper type which
ply with X-ray emission standards for products usingwill not damage insulated parts.
cathode ray tubes and those specified for compliance3) Replacement procedure
with various regulations regarding spurious radiation(1) Remove the old connector by cutting the wires at a point
emission.close to the connector.
Important : Do not reuse a connector (discard it).
3. Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
4. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wirescut close to connector
3) High voltage leads
Fig.3
5. Use specified insulating materials for hazardous live parts. Note
especially:(2) Strip about 15 mm of the insulation from the ends of the
1) Insulation Tape3) Spacers5) Barrierwires. If the wires are stranded, twist the strands to avoid
2) PVC tubing4) Insulation sheets for transistorsfrayed conductors.
15 mm
6. When replacing AC primary side components (transformers, power
cords, noise blocking capacitors, etc.) wrap ends of wires securely
about the terminals before soldering.
Fig.4
(3) Align the lengths of the wires to be connected. Insert the
wires fully into the connector.
Fig.1Metal sleeve
7. Observe that wires do not contact heat producing parts (heatsinks,
oxide metal film resistors, fusible resistors, etc.)
8. Check that replaced wires do not contact sharp edged or pointedConnector
parts.
Fig.5
9. When a power cord has been replaced, check that 10-15 kg of
(4) As shown in Fig.6, use the crimping tool to crimp the metal
force in any direction will not loosen it.
sleeve at the center position. Be sure to crimp fully to the
complete closure of the tool.
Power cord
1.25Crimping tool
2.0
5.5
Fig.2Fig.6
10. Also check areas surrounding repaired locations.(5) Check the four points noted in Fig.7.
Crimped at approx. center
11. Products using cathode ray tubes (CRTs)Not easily pulled free
of metal sleeve
In regard to such products, the cathode ray tubes themselves, the
high voltage circuits, and related circuits are specified for compli-
ance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath-Conductors extended
ode ray tubes and other parts with only the specified parts. Under
Wire insulation recessed
no circumstances attempt to modify these circuits.
more than 4 mm
Unauthorized modification can increase the high voltage value and
cause X-ray emission from the cathode ray tube.Fig.7
IS40888-01 |
ACEC
JVC
