Panasonic PVQ-1312W Service Manual page 4

110 (Cold chassis ground)
(For model with 25 inch CRT)
B+ Line
Minimum Resistance
125.0 V
1 k (Cold chassis ground)
27.0 V
180 (Cold chassis ground)
17.0 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 (For model with 13 inch CRT) or 30.0
kV (For model with 20 inch CRT) or 32.0 kV (For model with 25
inch CRT) are present when this TV set is in operation. Operation
of the TV set without the rear cover involvesthe 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 tubeto 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 readingshould
be between 1 M
have a return path to the chassis, the reading must be infinity.
and 12 M . When the exposed metal does not
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