Yamaha DSP-E800 Service Manual page 6

DSP-E800
7. Checking the Amplifier Unit and Replacing
Components
a. Turn off the power switch and unplug the power
plug from the AC outlet.
b. Remove 9 screws ( o, !0 , !1 ) indicated in Fig. 5.
c. Remove 5 screws ( !2 , !3 ) indicated in Fig. 6.
d. Loosen the wire ring, which fixes the wire harness.
e. After removing the Amplifier Unit / Main (2) P.C.B,
lift up the rear of the Amplifier Unit with a wire and
set it as shown in Fig. 7.
f. Use an insulating material (a rather thick cloth) so
as to prevent the Amplifier Unit / Main (2) P.C.B.
from contacting other P.C.B's, chassis and power
transformer.
g. Using a lead wire, connect the grounding of the pin
jack to the chassis.
(If it is left unconnected, the grounding floats and
the unit may fail to function properly.)
h. Connect the power plug and turn on the power
switch.
Main (2) P.C.B.
4-1
o
!3
Amplifier Unit
!0
o
!2
!2
Cloth
Wire
Fig. 7
!1
Fig. 5
Fig. 6