Lcd Circuit Board; Pn1 (4/4 Encoder) Circuit Board; Pn1 (2/4 Meter) Circuit Board; Pn1 (1/4) Circuit Board - Yamaha DM1000 Service Manual

DM1000/MB1000/SP1000
24.

LCD Circuit Board

(Time required: About 8 minutes)
24-1. Remove the SP1000. (See procedure 1.)
24-2. Remove the MB1000. (See procedure 2.)
24-3. Fasten the control panel assembly. (See procedure 3.)
24-4. Remove the two (2) screws marked [120B] and the
two (2) screws marked [170]. The LCD circuit board
can then be removed with the LCD shield film and
the LCD shield plate. (Photo.15)
24-5. Remove the two (2) screws marked [120C]. The LCD
circuit board can then be removed. (Photo.16)
25. PN1 (1/4), (2/4 Meter), (3/4 Joystick) and
(4/4 Encoder) Circuit Boards
25-1. Remove the SP1000. (See procedure 1.)
25-2. Remove the MB1000. (See procedure 2.)
25-3. Fasten the control panel assembly. (See procedure 3.)
25-4. Remove the FD circuit board. (See procedure 23.)
25-5. PN1 (3/4 Joystick) Circuit Board
(Time required: About 9 minutes):
Remove the three (3) screws marked [218]. The PN1
(3/4 joystick) circuit board can then be removed.
(Fig.9)

25-6. PN1 (4/4 Encoder) Circuit Board

(Time required: About 10 minutes):
a. Remove the three (3) screws marked [220A]. The
PN1 (4/4 encoder) circuit board can then be removed
with the encoder knob. (Fig.9, photo.14)
b. Remove the encoder knob and the hexagonal nut.
The encoder angle bracket can then be removed
from the PN1 (4/4 encoder). (photo.14)

25-7. PN1 (2/4 Meter) Circuit Board

(Time required: About 10 minutes):
a. Remove the LCD shield plate. (See procedure 24-4.)
b. Remove the two (2) screws marked [120D]. The PN1
(2/4 meter) circuit board can then be removed. (Fig.9)

25-8. PN1 (1/4) Circuit Board

(Time required: About 12 minutes):
a. Remove the three (3) encoder knobs marked [300],
the sixteen (16) encoder knobs marked [310] and
the knob marked [350B] from the control panel side.
(Fig. 8)
b. Remove the PN1 (4/4 encoder) circuit board.
(See procedure 25-6-a.)
c. Remove the fourteen (14) screws marked [220B].
The PN1 (1/4) circuit board can then be removed.
(Fig. 9)
26. PN2 Circuit Board
(Time required: About 8 minutes)
26-1. Remove the SP1000. (See procedure 1.)
26-2. Remove the MB1000. (See procedure 2.)
26-3. Fasten the control panel assembly. (See procedure 3.)
26-4. Remove the five (5) screws marked [240B]. The PN2
circuit board can then be removed. (Fig.9)
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