SECTION 1
PRECAUTIONS
1.1 SAFTY PRECAUTIONS
Prior to shipment from the factory, JVC products are strictly in-ray tubes and other parts with only the specified parts. Under
spected to conform with the recognized product safety and elec-no circumstances attempt to modify these circuits.Unautho-
trical codes of the countries in which they are to berized modification can increase the high voltage value and
sold.However,in order to maintain such compliance, it is equallycause X-ray emission from the cathode ray tube.
important to implement the following precautions when a set is(12) Crimp type wire connector
being serviced.In such cases as when replacing the power transformer in
sets where the connections between the power cord and
1.1.1 Precautions during Servicing
power trans former primary lead wires are performed using
(1) Locations requiring special caution are denoted by labels
crimp type connectors, if replacing the connectors is un-
and inscriptions on the cabinet, chassis and certain parts of
avoidable, in order to prevent safety hazards, perform care-
the product.When performing service, be sure to read and
fully and precisely according to the following steps.
comply with these and other cautionary notices appearing in
? Connector part number :E03830-001
the operation and service manuals.
? Required tool : Connector crimping tool of the proper
(2) Parts identified by the symbol and shaded ( ) parts
type which will not damage insulated parts.
are critical for safety.
? Replacement procedure
Replace only with specified part numbers.
a) Remove the old connector by cutting the wires at a
NOTE :
point close to the connector.
Parts in this category also include those specified to
Important : Do not reuse a connector (discard it).
comply with X-ray emission standards for products
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.3
? Wires covered with PVC tubingb) Strip about 15 mm of the insulation from the ends of
? Double insulated wiresthe wires. If the wires are stranded, twist the strands
? High voltage leadsto 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.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.5
Fig.1d) As shown in Fig.6, use the crimping tool to crimp the
(7) Observe that wires do not contact heat producing partsmetal sleeve at the center position. Be sure to crimp
(heatsinks, oxide metal film resistors, fusible resistors, etc.)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 kg
of force in any direction will not loosen it.
1.25Crimping tool
2.0
5.5
Power cordFig.6
e) Check the four points noted in Fig.7.
Crimped at approx. center
Not easily pulled free
Fig.2of metal sleeve
(10) Also check areas surrounding repaired locations.
(11) Products using cathode ray tubes (CRTs)In regard to such
products, the cathode ray tubes themselves, the high volt-Conductors extended
age circuits, and related circuits are specified for complianceWire insulation recessed
with recognized codes pertaining to X-ray emission. Conse-more than 4 mm
quently, when servicing these products, replace the cathodeFig.7
(No.86712)1-3 |
ACEC
