Yamaha O2R96 Service Manual page 36

02R96
Bottom Assembly Section
5. CPU1 Circuit Board
(Time required: About 15 minutes)
5-1. Remove the SP02R96. (See procedure 1.)
5-2. Remove the MB02R96. (See procedure 2.)
5-3. Fasten the control panel assembly. (See procedure 3.)
5-4. Remove the four (4) screws marked [590]. The CPU1
circuit board can then be removed. (Fig.4)
6. Replacing the Lithium Battery
(Time required: About 15 minutes)
6-1. Remove the SP02R96. (See procedure 1.)
6-2. Remove the MB02R96. (See procedure 2.)
6-3. Fasten the control panel assembly. (See procedure 3.)
6-4. You can replace the lithium battery from the CPU1
circuit board. (Fig.4)
The lithium battery is not part of the CPU1
circuit board. When you replace the CPU1
circuit board, you should remove the lithium
battery from the board, and install in the holder
on the new circuit board.
7. DSP Circuit Board
(Time required: About 25 minutes)
7-1. Remove the SP02R96. (See procedure 1.)
7-2. Remove the MB02R96. (See procedure 2.)
7-3. Fasten the control panel assembly. (See procedure 3.)
7-4. Fasten the rear assembly U. (See procedure 4.)
7-5. Remove the CPU1 circuit board. (See procedure 5.)
7-6. Remove the eight (8) screws marked [560], the four
(4) screws marked [575] and the two (2) CPU holders.
The DSP circuit board can then be removed. (Fig.5)
8. BRG Circuit Board
(Time required: About 20 minutes)
8-1. Remove the SP02R96. (See procedure 1.)
8-2. Remove the MB02R96. (See procedure 2.)
8-3. Fasten the control panel assembly. (See procedure 3.)
8-4. Fasten the rear assembly U. (See procedure 4.)
8-5. Remove the six (6) screws marked [410A]. The BRG
circuit board can then be removed. (Fig.5)
9. Power Supply Unit
(Time required: About 20 minutes)
9-1. Remove the SP02R96. (See procedure 1.)
9-2. Remove the MB02R96. (See procedure 2.)
9-3. Fasten the control panel assembly. (See procedure 3.)
9-4. Fasten the rear assembly U. (See procedure 4.)
9-5. Remove the six (6) screws marked [330], the three
(3) screws marked [340], the screw marked [350]
and the four (4) screws marked [360]. The power
supply unit can then be removed. (Fig.5)
The power switch knob is not part of the power
supply unit. When you replace the power supply
unit, you should remove the power switch knob
from the power supply unit, and install in the
new power supply unit.
36