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ORDER NO. MKE0008107C1
B6
Combination VCR
PVQ-130W
PVQ-130WA
PVQ-1300W
PVQ-1300WA
SPECIFICATIONS
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1. SAFETY PRECAUTIONS
GENERAL GUIDELINES
1. IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for
safety. These parts are marked by in the Schematic Diagrams, Circuit Board
Layout, Exploded Views and Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer's specified parts to prevent
X-RADIATION, shock, fire, or other hazards. Do not modify the original design
without permission of manufacturer.
2. An Isolation Transformer should always be used during the servicing of
Combination VCR whose chassis is not isolated from the AC power line. Use a
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transformer of adequate power rating as this protects the technician from
accidents resulting in personal injury from electrical shocks. It will also protect
Combination VCR from being damaged by accidental shorting that may occur
during servicing.
3. When servicing, observe the original lead dress, especially the lead dress in the
high voltage circuits. If a short circuit is found, replace all parts which have been
overheated or damaged by the short circuit.
4. After servicing, see to it that all the protective devices such as insulation barriers,
insulation papers, shield, and isolation R-C combinations are properly installed.
5. Before turning the receiver on, measure the resistance between B+ line and
chassis ground. Connect (-) side of an ohmmeter to the B+ lines, and (+) side to
chassis ground. Each line should have more resistance than specified, as follows :
B+ Line
Minimum Resistance
115 V
1 k (Cold chassis ground)
24 V
180 (Cold chassis ground)
15 V
110 (Cold chassis ground)
6. When the TV set is not used for a long period of time, unplug the power cord from
the AC outlet.
7. Potentials, as high as 25.0 kV are present when this TV set is in operation.
Operation of the TV set without the rear cover involves the danger of a shock
hazard from the TV set power supply. Servicing should not be attempted by
anyone who is not thoroughly familiar with the precautions necessary when
working on high voltage equipment. Always discharge the anode of the picture
tube to the CRT ground of receiver before handling the tube.
8. After servicing make the following leakage current checks to prevent the customer
from being exposed to shock hazards.
LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. For physically operated power switches, turn power on. Otherwise skip step 2.
3. Measure the resistance value, with an ohmmeter, between the jumpered AC plug
and each exposed metallic cabinet part on the receiver, such as screwheads,
connectors, etc. When the exposed metallic part has a return path to the chassis,
the reading should be between 1 M and 12 M. When the exposed metal does not
have a return path to the chassis, the reading must be infinity.
LEAKAGE CURRENT HOT CHECK
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1. Plug the AC cord directly into the AC outlet.
Do not use a isolation transformer for this check.