Yamaha RX-V730 Service Manual page 6

RX-V730/RX-V730RDS/RX-V630/RX-V630RDS
HTR-5560/HTR-5560RDS/DSP-AX630/DSP-AX630SE
Replacement of Power Transistor, Speaker
Protection Relay
It is easy to replace the power transistor and speaker
protection relay of this unit according to the following
procedure.
a. Remove the top cover. (Refer to "1. Top Cover
Removal" on p.15.)
b. Remove 1 screw (C) and 4 screws (D). (Fig. 7)
c. Replace the flexible flat cable connecting CB253 of
MAIN (3) P.C.B. and CB308 or FUNCTION (1) P.C.B.
with the extension cable specified below. (Fig. 9)
Extension cable: MF136300
d. Raise the MAIN P.C.B. (Fig. 10)
e. In this state, the power transistor and speaker
protection relay can be replaced.
18
Extension cable
CB253
CB308
Fig. 9
C D
Fig. 10