17” CDT Color Monitor | 107B7 |
2. Precautions and notices
2-1.Safety precautions
1.Observe all caution and safety related notes located inside the display cabinet.
2.Operation of the display with the cover removed, may cause a serious shock hazard from the display power supply. Work on the display should not be attempted by anyone who is not thoroughly familiar with precautions necessary when working on high voltage equipment.
3.Do not install, remove or handle the picture tube in any manner unless
4.The picture tube is constructed to limit
5.Symbol“ “ means safety relative parts. The use of substitute replacement parts which do not have the same characteristics as specified in the parts list may create shock, fire or explode etc.
6.Symbol“ ” means
list in this manual carefully to avoid creating higher anode voltage or
7.Before returning a serviced display to the customer, a thorough safety test must be performed to verify that the display is safe to operate without danger or shock. Always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as screw heads.
Test method for current leakage is described as follow.
(a)Plug the AC line cord directly into rated AC outlet (do not use a line isolation transformer during this check).
(b)Use an AC voltmeter having 5000 ohms per volt or with more sensitivity in the following manner: Connect a 1500 ohms 10 Watt resistor, paralleled by a 0.15UF, AC type capacitor between a known good earth ground (water pipe, conduit, etc.) and the exposed metallic parts simultaneously. Measure the AC voltage across the combination of 1500 ohms resistor and 0.15UF capacitor.
(c)Reverse the AC plug at the AC outlet and repeat AC voltage measurements for each exposed metallic part.
(d)Voltage measured must not exceed 0.5 volts RMS. This corresponds to 0.35 milliamp AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately.
7