Bottom Assembly Section; Dcd Circuit Board; Dca 1/5 Circuit Board; Dca 2/5, 3/5 And 4/5 Circuit Boards - Yamaha DM1000 Service Manual

DM1000/MB1000/SP1000

Bottom Assembly Section

5.

DCD Circuit Board

(Time required: About 8 minutes)
5-1. Remove the SP1000. (See procedure 1.)
5-2. Remove the MB1000. (See procedure 2.)
5-3. Fasten the control panel assembly. (See procedure 3.)
5-4. Remove the four (4) screws marked [410] and the
two (2) screws marked [411]. The DCD circuit board
can then be removed. (Fig.3, Photo.4)
When removing the circuit board, if it is hard
to handle while the control panel assembly is
fixed slantwise at the stay, open it widely at
180° for the work.
6.

DCA 1/5 Circuit Board

(Time required: About 12 minutes)
6-1. Remove the SP1000. (See procedure 1.)
6-2. Remove the MB1000. (See procedure 2.)
6-3. Fasten the control panel assembly. (See procedure 3.)
6-4. Remove the rear assembly U. (See procedure 4-5.)
6-5. Remove the five (5) screws marked [340] and the
four (4) screws marked [341]. The DCA 1/5 circuit
board can then be removed. (Fig.3, Photo.5)
7.

DCA 2/5, 3/5 and 4/5 Circuit Boards

(Time required: About 10 minutes each)
7-1. Remove the SP1000. (See procedure 1.)
7-2. Remove the MB1000. (See procedure 2.)
7-3. Fasten the control panel assembly. (See procedure 3.)
7-4. Fasten the rear assembly U. (See procedure 4-4.)
7-5. Remove the screw marked [335]. The DCA 2/5 circuit
board can then be removed. (Fig.3, Photo.6)
The DCA 3/5 and 4/5 circuit boards can be
removed in the same manner.
8. OPT Circuit Board
(Time required: About 11 minutes)
8-1. Remove the SP1000. (See procedure 1.)
8-2. Remove the MB1000. (See procedure 2.)
8-3. Fasten the control panel assembly. (See procedure 3.)
8-4. Fasten the rear assembly U. (See procedure 4-4.)
8-5. Remove the four (4) screws marked [110A]. The IF
plate can then be removed. (Fig.3)
8-6. Remove the three (3) screws marked [12A] and the
two (2) screws marked [12B]. The bottom stay, the
OPT angle and the OPT circuit board can then be
removed. (Fig.3)
8-7. Remove the four (4) screws marked [230]. The OPT
circuit board can then be removed from the OPT
angle. (Photo.7)
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