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Yamaha LS9 Service Manual page 29

Digital mixing console
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A-6. PHN Circuit Board
(Time required: About 5 minutes)
A-6-1 Remove the side panels L and R. (See procedure 1)
A-6-2 Remove the control panel assembly 16.
(See procedure 2)
A-6-3 Remove the two (2) screws marked [332A].
A-6-4 Remove the knob L marked [100A], the screw
marked [332B], and the hexagonal nut marked
[334A]. The PHN circuit board can then be
removed. (Fig. 5)
<Rear view>
AC inlet assembly
(インレットAss'y)
[502A]
[218B]
<Top view>
DC Shield assembly 16
(DCシールドAss'y 16)
[242A]
[312C]
[312B]
CPU support B
(CPUサポートB)
[312A]
CPU support A
(CPUサポートA)
[62A]: Bind Head Tapping Screw-B (Bタイト+BIND) 3.0X6 MFZN2B3 (WF028600)
[212]: Bind Head Tapping Screw-B (Bタイト+BIND) 3.0X6 MFZN2B3 (WF028600)
[218]: Bind Head Tapping Screw-B (Bタイト+BIND) 3.0X6 MFZN2B3 (WF028600)
[230A]: Bind Head Tapping Screw-B (Bタイト+BIND) 4.0X6 MFZN2B3 (WE973200)
[242A]: Bind Head Tapping Screw-B (Bタイト+BIND) 3.0X6 MFZN2B3 (WF028600)
[312]: Bind Head Tapping Screw-B (Bタイト+BIND) 3.0X6 MFZN2B3 (WF028600)
[332]: Bind Head Tapping Screw-B (Bタイト+BIND) 3.0X6 MFZN2B3 (WF028600)
[334A]: Hexagonal Nut (特殊六角ナット) 9.0 MFNI33 (V2431400)
[342A]: Bind Head Tapping Screw-B (Bタイト+BIND) 3.0X6 MFZN2B3 (WF028600)
[502A]: Bonding Tapping Screw-B (Bタイト+BOND) 3.0X8 MFZN2B3 (WE774100)
[62A]
[218B]
Ferrite core
(フェライトコア)
DA-JK angle L
(DA-JK金具 (L) )
DSP
[312C]
Fig. 5 ( 図5)
A-6.  PHNシート
(所要時間 : 約5分)
A-6-1  サイドパネルL, Rを外します。 ( 1項参照)
A-6-2  コンパネAss'y 16を外します。 ( 2項参照)
A-6-3  [332A]のネジ2本を外します。
A-6-4  [100A]の ノ ブ ( ダ イ ) 1個 と[332B]の ネ ジ1本 と
[334A]の特殊六角ナット1個を外して、PHNシー
トを外します。 ( 図5)
<Front view>
[230A]
Earth
(アース)
[212A]
ACIN
(ACシールド ボトム)
DCD
[342A]
[332A]
PHN
[332A]
[100A]
LS9-16/LS9-32
[218A]
AC top shield
(ACシールド トップ)
AC Bottom shield
Power supply unit
(電源ユニット)
<Front view>
[332B]
[334A]
LEVEL
PHONES
29

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