Yamaha PSR-S750, Service Manual

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PSR-S750/PSR-S950
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6. DM Circuit Board
(Time required: About 5 minutes)
6-1. Remove the lower case assembly. (See procedure 2.)
6-2. PSR-S750: Remove the eight (8) screws marked
[440A]. The DM circuit board can then be removed.
(Fig. 3)
6-3. PSR-S950: Remove the screw marked [440B] on the
rear and the six (6) screws marked [440C]. The DM
circuit board can then be removed. (Fig. 3)
7. AJACK Circuit Board
(Time required: About 5 minutes)
7-1. Remove the lower case assembly. (See procedure 2.)
7-2. Remove the two (2) screws marked [440D] on the rear
and the seven (7) screws marked [430B]. The AJACK
circuit board can then be removed. (Fig. 3)
8. Center Panel Assembly
(Time required: About 6 minutes)
8-1. Remove the lower case assembly. (See procedure 2.)
8-2. Remove the screw marked [440E] and the eight (8)
screws marked [510A]. (Fig. 4)
8-3. Remove the encoder knob. (Fig. 5)
8-4. Remove the screw marked [510B]. The center panel
assembly can then be removed. (Fig. 5)
* When installing the center panel assembly, fi t claws of
the center panel into the holes in the upper case and
install the center panel in the arrow direction. (Fig. 6)
<Bottom view>
DM
HP
AJACK
DM
AJACK
*2
MOD
PB
[510A] [510A]
[510A] [510A]
[420B]
[420B]
[440E]
* This figure shows the PSR-S950.
UPPER CASE ASSEMBLY
[440E]
*2: This figure shows the PSR-S750.
KEYBOARD ASSEMBLY
Fig. 4