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.
vPrecautions during Servicing
1. Locations requiring special caution are denoted by labels and12. Crimp type wire connector
inscriptions on the cabinet, chassis and certain parts of theIn such cases as when replacing the power transformer in sets
product. When performing service, be sure to read and com-where the connections between the power cord and power
ply with these and other cautionary notices appearing in thetransformer primary lead wires are performed using crimp type
operation and service manuals.connectors, if replacing the connectors is unavoidable, in or-
der to prevent safety hazards, perform carefully and precisely
according to the following steps.
2. Parts identified by the symbol and shaded ( ) parts are
critical for safety.
1) Connector part number : E03830-001
Replace only with specified part numbers.
2) Required tool : Connector crimping tool of the proper type
Note: Parts in this category also include those specified to com-
which will not damage insulated parts.
ply with X-ray emission standards for products using
3) Replacement procedure
cathode ray tubes and those specified for compliance
(1) Remove the old connector by cutting the wires at a point
with various regulations regarding spurious radiation
close to the connector.
emission.
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.
(2) Strip about 15 mm of the insulation from the ends of
Note especially:
the wires. If the wires are stranded, twist the strands to
1) Insulation Tape3) Spacers5) Barrier
avoid frayed conductors.
2) PVC tubing4) Insulation sheets for transistors
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 orConnector
pointed parts.
Fig.5
9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.(4) As shown in Fig.6, use the crimping tool to crimp the
metal 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.
11. Products using cathode ray tubes (CRTs)Not easily pulled freeCrimped at approx. center
of metal sleeve
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-Conductors extended
ode ray tubes and other parts with only the specified parts.
Wire insulation recessed
Under 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
1S40888-01 |
ACEC
