Yamaha DSP-AX620 Service Manual page 8

DSP-AX620
5. Removal of Input (1)/(2) P.C.B.
(Checking the Input (1)/(2) P.C.B. and Replacing Components)
a. Remove the DSP P.C.B.
b. Remove 1 screw ( !0 ) and then remove the Input (4) P.C.B. in Fig. 4.
c. Remove 2 screws ( !1 ) and then remove the Operation (5) P.C.B. in Fig. 4.
d. Remove 4 screws ( !2 ) and then remove the Operation (3) P.C.B. in Fig. 4.
e. Remove 7 screws ( !3 and !4 ) and then remove the Operation (2) P.C.B. in Fig. 4
and 5.
f. Remove 8 screws ( !5 and !6 ) and then remove the Input (1)/(2) P.C.B. in Fig. 4
and 5.
g. Place the INPUT (1)/(2) P.C.B. as shown in Fig. 6 and check them for operation.
Note :
When DSP P.C.B., INPUT (1)/(4) P.C.B., OPE (2)/(3) P.C.B., and OPE (5) P.C.B. have been
removed from the rear panel, the ground connection becomes open. Connect the ground of
each P.C.B. to the chassis by using a lead wire.
!3 x 6 !0
OPE (2)
OPE (5)
7
!1 x 2 !2 x 4
!5 x 7
Fig. 4
INPUT (1)
OPE (3)
INPUT (4)
OPE (3)
INPUT (2)
DSP
INPUT (4)
!4
OPE (5)
OPE (2)
INPUT (2)
!6
INPUT (1)
Fig. 5
Cloth
Fig.6