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Yamaha AVR-S80 Service Manual page 13

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6. Removal of MAIN (1) P.C.B.
a. Remove 4 screws (B) and 2 screws (C). (Fig. 3)
b. Remove 2 screws (D) and 2 screws (E). (Fig. 5)
c. Remove the MAIN (1) P.C.B.. (Fig. 5)
Shortcut to MAIN (1) P.C.B. operation check
a. Remove the top cover. (Fig. 1)
b. Remove CB2 and disconnect the flat cable from the
Cable/Holder. (Fig. 4)
c. Remove 2 screws (7), 2 screws (9) and 4 screws (F).
(Fig. 3)
d. Remove 2 screws (8). (Fig. 4)
e. Remove 2 screws (D) and 2 screws (E). (Fig. 5)
f. With the rear panel attached, remove the MAIN (1)
P.C.B.. At the same time, remove the Frame/DSP.
g. With the rear panel attached, set the MAIN (1) P.C.B.
upright. (Fig. 6)
h. Using a servicing extension cable, connect the MAIN
(1) P.C.B and DSP P.C.B. (Fig. 6)
Extension cable for pin No. 35: MF135300 (300 mm)
i. Using lead wires or the like, connect between G1 of the
MAIN (1) P.C.B. and chassis, between G2 of the MAIN
(1) P.C.B. and chassis, and between the rear panel and
chassis respectively. (Fig. 6)
earth (lead wire)
D
E
Fig. 5
Tuner
SUB (3) P.C.B.
G2
Extension Cable
DSP P.C.B.
Fig. 6
B
C
D
E
MAIN (1) P.C.B.
7
9
8
D
E
Rear Panel
MAIN (1) P.C.B.
earth (lead wire)
G1
AVR-S80/NX-SW80
F
13

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