Yamaha O2R96 Service Manual page 44

02R96
Control Panel Assembly Section
When removing the circuit board, if it is hard to handle
while the control panel assembly is fixed slantwise
at the front stay, open it widely at 180° for the work.
22. SUB Circuit Board
(Time required: About 15 minutes)
22-1. Remove the SP02R96. (See procedure 1.)
22-2. Remove the MB02R96. (See procedure 2.)
22-3. Fasten the control panel assembly. (See procedure 3.)
22-4. Remove the eight (8) screws marked [180A]. The
SUB circuit board can then be removed. (Fig.9)
23. PN1 Circuit Board
(Time required: About 20 minutes)
23-1. Remove the SP02R96. (See procedure 1.)
23-2. Remove the MB02R96. (See procedure 2.)
23-3. Remove the four (4) encoder knobs marked [410B]
and the sixteen (16) encoder knobs marked [450A]
from the control panel side. (Fig.8)
23-4. Fasten the control panel assembly. (See procedure 3.)
23-5. Remove the SUB circuit board. (See procedure 22.)
23-6. Remove the twenty (20) screws marked [160A]. The
PN1 circuit board can then be removed with the
SUB1 and SUB2 holders. (Fig.10)
24. JS Circuit Board
(Time required: About 15 minutes)
24-1. Remove the SP02R96. (See procedure 1.)
24-2. Remove the MB02R96. (See procedure 2.)
24-3. Fasten the control panel assembly. (See procedure 3.)
24-4. Remove the four (4) screws marked [160B]. The JS
circuit board can then be removed. (Fig.10)
25. PN2 Circuit Board
(Time required: About 25 minutes)
25-1. Remove the SP02R96. (See procedure 1.)
25-2. Remove the MB02R96. (See procedure 2.)
25-3. Remove the encoder knob marked [410C], the five
(5) encoder knobs marked [420], the eight (8) encoder
knobs marked [440], the eight (8) encoder knobs
marked [450B], the knob marked [460C] and the knob
marked [470] from the control panel side. (Fig.8)
25-4. Fasten the control panel assembly. (See procedure 3.)
25-5. Remove the JS circuit board. (See procedure 24.)
25-6. Remove the twenty-two (22) screws marked [165].
The PN2 circuit board can then be removed with
the insulating sheet. (Fig.10)
25-7. Remove the five (5) cord holders. The insulating
sheet can then be removed from the PN2 circuit
board. (Fig.10)
The insulating sheet is fastened to the PN2
circuit board by the cord holders.
When you replace the PN2 circuit board, be
sure to attach the insulating sheet as before.
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