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RGB Gain Control Board (135)
1. Remove the cabinet front (150).
2.
Disconnect the cables from the primary control
board and power LED.
3.
Remove the two screws (130) securing the RGB
gain control board and remove the board from the
cabinet front.
NOTE: The control knobs do not have to be removed
because they will fit through the openings in the front
of the cabinet.
Main Board (85)
The main board is mounted on two plastic guides that
are bolted to the chassis.
1. Spring the retaining clips to free the board from
the two plastic guides (80 and 82).
2.
Disconnect all cables from the board (85) and lift
it out of the cabinet.
NOTE: The board may be secured to the plastic guides
with screws also. These screws would have to be re-
moved.
High Voltage and Horizontal
Sweep Assembly (77)
1. Remove the cabinet back (10).
2.
Remove the cabinet top (20).
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3.
Discharge the high voltage and disconnect the
high voltage lead from the CRT.
WARNING: Discharge the high voltage at the anode
lead to the CRT using a jumper lead connected be-
tween the chassis and a screwdriver. Otherwise, shock
or injury may result. Refer to the inset of Figure 6-1.
4.
Remove the four screws (75) holding the board
to the chassis and disconnect all remaining cables
from the assembly.
CRT Disassembly (105)
NOTE: CRT replacement is not recommended for field
service because the touch control realignment is criti-
cal and difficult.
NOTE: CRT is replaceable as CRT, yoke, and beam
bender assembly only. This eliminates field service
purity and convergence adjustments. If impurities ap-
pear, check the degaussing circuit.
1.
Remove the cabinet back (10).
2.
Remove the cabinet front (20).
3.
Discharge the high voltage and disconnect the
high voltage lead from the CRT (105).
WARNING: Discharge the high voltage at the anode
lead to the CRT using a jumper lead connected be-
tween the chassis and a screwdriver. Otherwise, shock
or injury may result. Refer to the inset of Figure 6-1.
4.
Cut the tie which holds the high voltage lead to
the corner of the CRT.
Disassembly/Reassembly
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