Yamaha EV-204 Service Manual page 9

2. AMP Circuit Board (Time required: about 3 min)
2-1 Remove the amplifier unit. (See procedure 1)
2-2 Remove the four (4) screws marked [60]. (Fig.4)
2-3 Remove the hexagonal nut marked [110]. (Fig.4)
2-4 Remove the VR knob marked [30].
The AMP circuit board can then be removed.
(Fig.4)
Note: • When reinstall the AMP circuit board, bundle
the shield sheet (GND tape attached) by the
same screw as shown in the illustration.
(Fig.4)
• When reinstall the slide button marked [C20]
and the slider marked [C100], set the two
slide switches on the AMP circuit board to
the same direction. (Fig.5)
Apply the GND tape to alu-
minium evaporated side of the
shield sheet, and fold it back to
apply to ground pattern on the
component side of the AMP
circuit board
[30]: Knob ABS (VP224600)
[60]: PWHP Tapping Screw 3.0X8-8 MFZN2Y (VA122000)
[110]: Hexagonal Nut 12.0 MFZN2BL (VB508600)
Slide SW knob Slide SW knob Slide SW knob
Shield sheet
(Aluminium evaporated side)
Fold back and apply to ground pattern on the
component side of the AMP circuit board.
(Fig. 4)
[C20]
[C100]
AMP
(Fig. 5)
[60]
AMP
GND tape
EV-204 / EV-205
[110]
[30]
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