Yamaha AO8 Service Manual page 12

AO8
[170]
[80]: Bind Head Tapping Screw-B 3.0x6 MFZN2BL (EP600230)
[100]: Bind Head Screw 3.0x8 MFZN2BL (VB659000)
[170]: Bind Head Tapping Screw-B A4.0x8 MFZN2BL (VC688800)
[430]: Bind Head Tapping Screw-B A4.0x8 MFZN2BL (VC688800)
5. Circuit Boards and Units
Remove the top panel, each circuit board and unit can
then be removed. (Fig. 3)
Circuit Board and Unit
IPC2
IPC4
DR
Power Transformer
6. Mother Assembly
6-1 Remove the UNC card assembly. (See Procedure 1.)
6-2 Remove the front panel assembly. (See Procedure 2.)
6-3 Remove the top panel. (See Procedure 4-3.)
6-4 Remove the seven (7) screws marked [280]. The mother
assembly can then be removed. (Fig. 3)
<Top View>
[240]
IPC2 IPC4
[280]
8
Ref. No.
A Screw
310 Bonding Screw 3.0x6 MFZN2BL (VS863000)
320 Bind Head Screw A4.0x6 MFZN2BL (EG340290)
380 Bonding Tapping Screw-B (VN413300)
240 Bonding Tapping Screw-B (VC688800)
DR
Power transformer
Upper chassis
<Top View>
LED2
[80]
[100]
PSB
Top panel
Fig. 2
Screw
<Rear View>
[280]
Mother assembly
[180]
[180]: Bind Head Tapping Screw-B A3.0x6 MFZN2BL (VP157900)
[280]: Bind Head Tapping Screw-B A4.0x8 MFZN2BL (VC688800)
Fig. 3
[430] x 17
QTY
2
2
2
2
4
[380] [320] [A]
[310] [320] [A]