Power Amplifier Unit, Power Circuit - Yamaha STAGEPAS 300 Service Manual

STAGEPAS 300
QQ
3 7 63 1515 0
TE
L 13942296513
Claw (
Fig.15 (
[Disassembly of Rear Case Assembly (Mixer Assembly)]
14.

Power Amplifier Unit, POWER Circuit

Board
(Time required: About 6 minutes)
14-1 Remove the screw marked [270A]. The power
amplifier unit A can then be removed. (Fig.17)
14-2 Remove the screw marked [270B]. The power
amplifier unit B can then be removed. (Fig.17)
14-3 Remove the two (2) screws marked [320]. The
insulator C can then be removed. (Fig.18)
14-4 Remove the two (2) rivets marked [310]. The
insulator B can then be removed. (Fig.18)
14-5 Remove the seven (7) screws marked [260]. The
POWER circuit board can then be removed. (Fig.17)
* The cushion A is not a part of the POWER circuit
board. When replacing the POWER circuit board,
www be sure to attach the cushion A to the new
POWER circuit board. (Fig.19)
.
12
http://www.xiaoyu163.com
Earth wire (green)
( ( ))
Power switch
( )
Panel (
Claw ( )
Power switch (
)
)
x ao
y
i
http://www.xiaoyu163.com
8
Panel (
(brown)
( )
(blue)
( )
Connector assembly (1P) (brown)
AC inlet
Soldering ( ) (AC
Fig.14 ( )
)
)
Claw
Q Q
3 6 7 ( 1 3 )
u163
.
2 9 9 4 2 8
)
Connector assembly (2P)
( 2P)
( 1P ( ))
)
Panel (
AC inlet
(AC
Claw (
1 5 0 5 8 2 9 9 4
Fig.16 ( )
m
co
9 9
)
)
)
2 8 9 9