Yamaha PSR-S770, Service Manual

Page: 14 / 110

PSR-S770/PSR-S970
14
4. AJACK Circuit Board
(Time required: About 5 minutes)
4-1. Remove the lower case assembly. (See procedure 2.)
4-2. Remove the two (2) screws marked [440B] on the rear
and the seven (7) screws marked [430A]. The AJACK
circuit board can then be removed. (Fig. 3)
* When installing the AJACK circuit board, tighten the
screws
z
and
x
shown in Fig. 3 in numerical order
and then tighten the other screws.
5. Center Panel Assembly
(Time required: About 6 minutes)
5-1. Remove the lower case assembly. (See procedure 2.)
5-2. Remove the seven (7) screws marked [510A] and the
screw marked [440C]. (Fig. 4)
5-3. Remove the encoder and volume knobs. (Fig. 5)
5-4. Remove the screw marked [510B]. The center panel
assembly can then be removed. (Fig. 5)
* When installing the center panel assembly, fit claws of
the center panel into the holes in the upper case and
install the center panel in the arrow direction. (Fig. 6)
Fig. 4
[510A] [510A]
[420B]
UPPER CASE ASSEMBLY
KEYBOARD ASSEMBLY
<PSR-S970 Bottom view>
[510A] [510A] [440C]
[420B]
UPPER CASE ASSEMBLY KEYBOARD ASSEMBLY
<PSR-S770 Bottom view>
HP
[430B]
[430B]
HP
[430B]
[430B]
[440C]