Omron 8025G Maintenance Manual page 176

MAINTENANCE AND REPAIR
SECTION 6
3. With a controlled-heat soldering iron (47 watts maximum), remove the
component and clear excess solder from the mounting holes as quickly
as possible.
4. Insert the new component pins to match the arrangement of the old
component.
5. Solder quickly and cleanly, using as little solder as possible.
Integrated Circuit Removal and Replacement. Integrated circuit (IC) com-
ponents are installed in IC sockets. To remove, use an IC puller. ~~en installing
these components, make sure the IC is oriented the same way as the socket into which
it is being installed.
CAUTION: TO PREVENT DAMAGE BY STATIC DISCHARGE, HANDLE IC
COMPONENTS IN THE SAME WAY AS CIRCUIT CARDS. REFER
TO PARAGRAPH 6.2.5.
Cathode Ray Tube (CRT) Removal and Replacement. To remove and install
the CRT, proceed as follows:
1. Turn the terminal off and remove the ac plug.
2. Wait 2 to 3 minutes for the high voltage (H.V.) supply to drain.
3. Remove the top section of the cabinet (refer to Paragraph 6.2.5).
4. Peel the H. V., cap on the red lead back from the CRT (see Figure 6-6).
5. Discharge H.V. by shorting the H.V. lead and CRT anode button to
ground. Also short the anode button to the aquadag coating on the
CRT.
6. Remove the H.V. lead from the CRT' by pinching the two spring wires
together.
7. Disconnect Pl06 (yellow and green wires) and PIll (red and blue \\'ires)
from the Moni tor Deflection Board (see Figure 6-5).
~1ake
sure the
wires are free of any cahling or clamps.
8. Remove the CRT socket.
9. Remove the upper two bolts and loosen the lower two bolts shOl·;n in
Figure 6-6.
10.
Support the CRT face and remove the lower two bolts in Figure 6-6.
WARNING: WEAR SAFETY GOGGLES AND HEAVY GLOVES WHEN REMOVING
OR INSTALLING THE CRT.