Yamaha O2R96 Service Manual page 42

02R96
19. 2TRI, ST, STD, PHN Circuit Boards
(Time required: About 20 minutes each)
19-1. Remove the SP02R96. (See procedure 1.)
19-2. Remove the MB02R96. (See procedure 2.)
19-3. Fasten the control panel assembly. (See procedure 3.)
19-4. Remove the PC support. (See procedure 16.)
19-5. 2TRI Circuit Board:
Remove the two (2) screws marked [200C] and
disconnect the connector from the ADA circuit board.
The 2TRI circuit board can then be removed. (Fig.6)
19-6. ST Circuit Board:
Remove the five (5) screws marked [200D] and
disconnect the connector from the ADA circuit board.
The ST circuit board can then be removed. (Fig.6)
19-7. STD Circuit Board:
Remove the two (2) screws marked [200E] and
disconnect the connector from the ADA circuit board.
The STD circuit board can then be removed. (Fig.6)
19-8. PHN Circuit Board:
Remove the two (2) screws marked [210A] and
disconnect the connector from the ADA circuit board.
The PHN circuit board can then be removed. (Fig.6)
20. AD1 Circuit Board
(Time required: About 25 minutes)
20-1. Remove the SP02R96. (See procedure 1.)
20-2. Remove the MB02R96. (See procedure 2.)
20-3. Fasten the control panel assembly. (See procedure 3.)
20-4. Remove the PC support. (See procedure 16.)
20-5. Remove the twelve (12) ANI1 circuit boards.
(See procedure 17.)
20-6. Remove the eight (8) screws marked [120A]. The
AD1 circuit board can then be removed. (Fig.7)
21. ADA Circuit Board
(Time required: About 25 minutes)
21-1. Remove the SP02R96. (See procedure 1.)
21-2. Remove the MB02R96. (See procedure 2.)
21-3. Fasten the control panel assembly. (See procedure 3.)
21-4. Remove the PC support. (See procedure 16.)
21-5. Remove the four (4) ANI1 circuit boards.
(See procedure 17.)
21-6. Remove the four (4) ANI2 assemblies.
(See procedure 18-5.)
21-7. Remove the 2TRI, ST, STD and PHN circuit boards.
(See procedure 19.)
21-8. Remove the eight (8) screws marked [120B]. The
ADA circuit board can then be removed. (Fig.7)
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