SECTION 1
PRECAUTION
1.1 SAFTY PRECAUTIONS
Prior to shipment from the factory, JVC products are strictlyemission. Consequently, when servicing these products,
inspected to conform with the recognized product safety andreplace the cathode ray tubes and other parts with only the
electrical codes of the countries in which they are to bespecified parts. Under no circumstances attempt to modify
sold.However,in order to maintain such compliance, it is equallythese circuits.Unauthorized modification can increase the
important to implement the following precautions when a set ishigh voltage value and cause X-ray emission from the
being serviced.cathode ray tube.
(12) Crimp type wire connectorIn such cases as when replacing
1.1.1 Precautions during Servicing
the power transformer in sets where the connections
(1) Locations requiring special caution are denoted by labels
between the power cord and power trans former primary
and inscriptions on the cabinet, chassis and certain parts of
lead wires are performed using crimp type connectors, if
the product.When performing service, be sure to read and
replacing the connectors is unavoidable, in order to prevent
comply with these and other cautionary notices appearing
safety hazards, perform carefully and precisely according
in the operation and service manuals.
to the following steps.
(2) Parts identified by the symbol and shaded ( ) parts
? Connector part number :E03830-001
are critical for safety.
? Required tool : Connector crimping tool of the proper
Replace only with specified part numbers.
type which will not damage insulated parts.
NOTE :? Replacement procedure
Parts in this category also include those specified toa) Remove the old connector by cutting the wires at a
comply with X-ray emission standards for productspoint close to the connector.Important : Do not
using cathode ray tubes and those specified forreuse a connector (discard it).
compliance with various regulations regarding
spurious radiation emission.
(3) Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as
specified.cut close to connector
(4) Use specified internal wiring. Note especially:
Fig.1-1-3
? Wires covered with PVC tubing
b) Strip about 15 mm of the insulation from the ends
? Double insulated wires
of the wires. If the wires are stranded, twist the
? High voltage leads
strands to avoid frayed conductors.
(5) Use specified insulating materials for hazardous live parts.
Note especially:15 mm
? Insulation Tape
? PVC tubing
?Spacers
? Insulation sheets for transistors
?BarrierFig.1-1-4
(6) When replacing AC primary side components (transformers,c) Align the lengths of the wires to be connected.
power cords, noise blocking capacitors, etc.) wrap ends ofInsert the wires fully into the connector.
wires securely about the terminals before soldering.Metal sleeve
Connector
Fig.1-1-5
Fig.1-1-1d) As shown in Fig.1-1-6, use the crimping tool to crimp
(7) Observe that wires do not contact heat producing partsthe metal sleeve at the center position. Be sure to
(heatsinks, oxide metal film resistors, fusible resistors, etc.)crimp fully to the complete closure of the tool.
(8) Check that replaced wires do not contact sharp edged or
pointed parts.
(9) When a power cord has been replaced, check that 10-15
1.25Crimping tool
kg of force in any direction will not loosen it.2.0
5.5
Power cordFig.1-1-6
e) Check the four points noted in Fig.1-1-7.
Crimped at approx. center
Not easily pulled free
of metal sleeve
Fig.1-1-2
(10) Also check areas surrounding repaired locations.
(11) Products using cathode ray tubes (CRTs)In regard to suchConductors extended
products, the cathode ray tubes themselves, the highWire insulation recessed
voltage circuits, and related circuits are specified formore than 4 mm
compliance with recognized codes pertaining to X-rayFig.1-1-7
(No.YF073)1-3 |
ACEC
