Sharp 50NP4, Руководство по обслуживанию

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g. X-radiation – TUBE: The primary source of X-
radiation in this receiver is the picture tube. The tube
utilized for the above mentioned function in this
chassis is specially constructed to limit X-radiation
emissions.
For continued X-radiation protection, the replacement
tube must be the same type as the original, Sharp
approved type.
When troubleshooting and making test measure-
ments in a receiver with a problem of excessive high
voltage, avoid being unnecessarily close to the pic-
ture tube and the high voltage component.
Do not operate the chassis longer than is necessary
to locate the cause of excessive voltage.
h. X-radiation Shield –
1. This receiver is provided with X-ray shield plates
for protection against X-radiation. Do not remove
X-ray shield plates A, B, or C shown in Fig. 1
unnecessarily, when troubleshooting and/or
making test measurements.
2. To prevent X-radiation, after replacement of
picture tube and lens, confirm these components
to be fixed correctly to bracket and cabinet, and
not to be taken off easily.
Shield Plate A (1.6mm)
Glass Lens for Shielding
Shield Plate B (1.6mm)
Shield Plate B (1.6mm)
Shield Plate C (1.6mm)
Detailing X-radiation shield, ( ) plate thickness
Shield Plate B (1.6mm)
Fig. 1. Installation of shield lens, shield cover and shield plates (oblique view).