48
7.5 Remove the six screws (11) that secure
the AC Input/Output board to the standoffs
(14). Lift the board out of the amplifier chas-
sis (23).
8. Interface Board Removal
8.1 Perform procedure 7.
Note: It's not necessary to remove all of the
wires on the terminals of the AC Input/Output
board to provide enough access to the
Interface board.
8.2 Disconnect any cables that may be
plugged into the FX CH1, FX CH2, SE-
QUENCE or REMOTE LEVEL connectors on
the rear panel of the amplifier chassis (23).
8.3 Disconnect the ribbon cable that runs
from the Interface board (12) to the signal
processor board (2) at J800.
8.4 Using a 5/16" nut driver, remove the two
nuts (16) that secure the line filter (19) to the
chassis. Swing the line filter up and off of the
mounting studs to provide access to the
screws on the Interface board.
8.5 Using a 1/4" nut driver, remove the three
aluminum standoffs (14) nearest the rear
panel chassis.
8.6 Using an offset Phillips-head screwdriver,
remove the four screws (11) that secure the
Interface board to the rear panel of the
amplifier chassis. Lift the board out of the
chassis.
Re-assembly Notes:
1. Rotate the interface board (12) so that the
ribbon cable is located at the bottom of the
board. Make sure that the ribbon cable feeds
under the board toward the solder
side of the board.
2. Make sure that the red and white wire
harness from P802 is feeding up toward the
top of the board.
9. Line Filter Removal
9.1 Perform procedure 7.
Note: It's not necessary to remove all of
the wires on the AC Input/Output board
terminals to provide enough access to the
line filter.
9.2 Make a note of the wiring configuration
and remove the wires from the terminals on
the line filter (19).
9.3 Using a 5/16" nut driver, remove the
two nuts (16) that secure the line filter to the
chassis (23). Lift out the line filter.
Re-assembly Note: The LINE end of the line
filter (with 3 terminals) faces toward the side
of the chassis.
10. Power Supply Board Removal
10.1 Perform procedure 1.
10.2 Disconnect the large power connector
that runs up to the amplifier RF housing (2)
at P600.
10.3 Disconnect the ribbon cable that runs
from the power supply board (25) to the
signal processor board at P300.
10.4 Make a note of the wiring color code,
and disconnect the wires that run from the
power transformer (21) to the power supply
board terminals.
10.5 Remove the four screws (11) that
secure the power supply board to the ampli-
fier chassis (23).
10.6 Carefully lift the power supply board out
of the amplifier chassis, taking care to not
break the red and white wires that run to the
connector on the input module connector
bracket (6).
DISASSEMBLY PROCEDURES
To Next Page
Loading...
