Disassembly Procedure - Yamaha AO8 Service Manual

DISASSEMBLY PROCEDURE

1. UNC Card Assembly
1-1 Remove the four (4) screws marked [470]. The UNC card
assembly can them be removed. (Fig. 1)
2. Front Panel Assembly
2-1 Remove the UNC card assembly. (See Procedure 1.)
2-2 Remove the thirty-two (32) screws marked [500]. The
blank panel can then be removed. (Fig. 1)
2-3 Remove the six (6) screws marked [450]. Each mount
bracket can then be removed. (Fig. 1)
2-4 Remove the six (6) screws marked [400]. The front panel
assembly can then be removed. (Fig. 1)
[400]
Front panel assembly
1 2 3
[400]
Mount bracket
[400]: Flat Head Screw 4.0x8 MFZN2BL (VA221200)
[450]: Oval Head Screw 4.0x8 MFZN2BL (VS153600)
3. LED2 Circuit Board
3-1 Remove the front panel assembly. (See Procedure 2.)
3-2 Remove the two (2) screws marked [80]. The LED2
circuit board can then be removed. (Fig. 2)
4. PSB Circuit Board
4-1 Remove the UNC card assembly. (See Procedure 1.)
4-2 Remove the front panel assembly. (See Procedure 2.)
4-3 Remove the seventeen (17) screws marked [430]. The top
panel can then be removed. (Fig. 2)
4-4 Remove the two (2) screws marked [100]. The PSB circuit
board can then be removed. (Fig. 2)
Blank panel
4 5 6 7 8
[500] x 32
[470]
UNC card assembly
[400]
[470]
Mount bracket
[452]: Oval Head Screw B4.0x8 MFZN2BL (V6221000)
[470]: Bonding Screw 3.0x6 MFZN2BL (VS863000)
[500]: Bonding Screw 3.0x6 MFZN2BL (VS863000)
Fig. 1
<Right Side View>
[450]
[452]
Mount bracket
<Left Side View>
[452]
Mount bracket
AO8
[450]
7