SECTION 1
PRECAUTIONS
1.1 SAFTY PRECAUTIONS
Prior to shipment from the factory, JVC products are strictly in-quently, when servicing these products, replace the cathode
spected to conform with the recognized product safety and elec-ray tubes and other parts with only the specified parts. Under
trical codes of the countries in which they are to beno circumstances attempt to modify these circuits.Unautho-
sold.However,in order to maintain such compliance, it is equallyrized modification can increase the high voltage value and
important to implement the following precautions when a set iscause X-ray emission from the cathode ray tube.
being serviced.(12) Crimp type wire connector
In such cases as when replacing the power transformer in
1.1.1 Precautions during Servicing
sets where the connections between the power cord and
(1) Locations requiring special caution are denoted by labels
power trans former primary lead wires are performed using
and inscriptions on the cabinet, chassis and certain parts of
crimp type connectors, if replacing the connectors is un-
the product.When performing service, be sure to read and
avoidable, in order to prevent safety hazards, perform care-
comply with these and other cautionary notices appearing in
fully and precisely according to the following steps.
the operation and service manuals.
? Connector part number :E03830-001
(2) Parts identified by the symbol and shaded ( ) parts
? Required tool : Connector crimping tool of the proper
are critical for safety.
type which will not damage insulated parts.
Replace only with specified part numbers.
? Replacement procedure
NOTE :
a) Remove the old connector by cutting the wires at a
Parts in this category also include those specified to
point close to the connector.
comply with X-ray emission standards for products
Important : Do not reuse a connector (discard it).
using cathode ray tubes and those specified for com-
pliance 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
? Double insulated wiresb) Strip about 15 mm of the insulation from the ends of
? High voltage leadsthe wires. If the wires are stranded, twist the strands
(5) Use specified insulating materials for hazardous live parts.to avoid frayed conductors.
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. Insert
power cords, noise blocking capacitors, etc.) wrap ends ofthe wires fully into the connector.
wires securely about the terminals before soldering.
Metal sleeve
Connector
Fig.1-1-5
d) As shown in Fig.1-1-6, use the crimping tool to crimp
Fig.1-1-1
the metal sleeve at the center position. Be sure to
(7) Observe that wires do not contact heat producing parts
crimp fully to the complete closure of the tool.
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
(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 kg1.25Crimping tool
2.0
of force in any direction will not loosen it.5.5
Fig.1-1-6
e) Check the four points noted in Fig.1-1-7.
Power cord
Crimped at approx. center
Not easily pulled free
of metal sleeve
Fig.1-1-2
Conductors extended
(10) Also check areas surrounding repaired locations.
(11) Products using cathode ray tubes (CRTs)In regard to suchWire insulation recessed
products, the cathode ray tubes themselves, the high volt-more than 4 mm
age circuits, and related circuits are specified for complianceFig.1-1-7
with recognized codes pertaining to X-ray emission. Conse-
(No.86733)1-3 |
ACEC
JVC
