Elo TouchSystems IntelliTouch Ultra, Руководство по эксплуатации продукта, Страница: 42 / 105

Disassem Disassembling the D bling the Display isplay
31 31
The anode lead of the display feeds high voltage from the flyback transformer to The anode lead of the display feeds high voltage from the flyback transformer to
the anode button on the CRT. The anode lead is usually red in color, and the
the anode button on the CRT. The anode lead is usually red in color, and the
actual connection to the anode button is usually covered by a large rubber suction
actual connection to the anode button is usually covered by a large rubber suction
cup-like boot. In most displays, the button is located on the tapered face, or bell,
cup-like boot. In most displays, the button is located on the tapered face, or bell,
of the CRT glass near the top of the display. See Figure 4-1, page 27.
of the CRT glass near the top of the display. See Figure 4-1, page 27.
It may be necessary to remove some sheet metal to gain access to the anode It may be necessary to remove some sheet metal to gain access to the anode
lead—be very careful to do this without making contact to the anode lead itself.
lead—be very careful to do this without making contact to the anode lead itself.
Carefully discharge the CRT using the following procedure: Carefully discharge the CRT using the following procedure:
1. 1. Connect a clip lead or a heavy-gauge wire to chassis ground of the display (or Connect a clip lead or a heavy-gauge wire to chassis ground of the display (or
if the CRT is free-standing, the mounting ears or the spring-tensioned ground
if the CRT is free-standing, the mounting ears or the spring-tensioned ground
strap).
strap).
2. 2. Connect the other end of the clip lead or wire to the stem of a flat blade Connect the other end of the clip lead or wire to the stem of a flat blade
screwdriver that has an insulated handle.
screwdriver that has an insulated handle.
3. 3. Hold the screwdriver by the insulated handle only. Insert the blade of the Hold the screwdriver by the insulated handle only. Insert the blade of the
screwdriver under the rubber boot and make contact with the anode lead at the
screwdriver under the rubber boot and make contact with the anode lead at the
button. A distinct snap may or may not be heard as it discharges, depending on button. A distinct snap may or may not be heard as it discharges, depending on
the amount of charge present on the anode. the amount of charge present on the anode.
4. 4. Disconnect the anode lead from the button by unhooking the spring wire clips. Disconnect the anode lead from the button by unhooking the spring wire clips.
Note the location of the anode for proper CRT orientation during reassembly.
Note the location of the anode for proper CRT orientation during reassembly.
WARNING WARNING
The CRT will regain a charge over time, even after it has been discharged. To The CRT will regain a charge over time, even after it has been discharged. To
avoid a dangerous electric shock, always discharge the CRT just before handling
avoid a dangerous electric shock, always discharge the CRT just before handling
it, and treat it with respect thereafter.
it, and treat it with respect thereafter.