In 1/5 Circuit Board; Front Panel Assembly - Yamaha PC4800N Service Manual

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PC9500N/PC4800N
3.
IN 1/5 Circuit Board (Time required: about 5 minutes)
3-1
Remove the top cover. (See Procedure 1.)
3-2
Remove the rear assembly. (See Procedure 2.)
3-3
Remove the two (2) screws marked [R310] and then
remove the SP terminal cover. (Fig. 2)
3-4
Remove the one (1) screw marked [R50] , two (2)
screws marked [R60] , four (4) screws marked [R70]
and four (4) screws marked [R75]. The IN 1/5 circuit
board can then be removed. (Fig. 3)
4.
IN 4/5 Circuit Board (Time required: about 5 minutes)
4-1
Remove the top cover. (See Procedure 1.)
4-2
Remove the rear assembly. (See Procedure 2.)
4-3
Remove the four (4) screws marked [40a]. The IN 4/5
circuit board can then be removed. (Fig. 1)
5.
IN 5/5 Circuit Board (Time required: about 3 minutes)
5-1
Remove the top cover. (See Procedure 1.)
5-2
Remove the two (2) screws marked [R40]. The IN 5/
5 circuit board can then be removed. (Fig. 3)
6.

Front Panel Assembly

(Time required: about 4 minutes)
6-1
Remove the three (3) screws marked [190a] from
the side cover L, three (3) screws marked [190b]
from the side cover R and two (2) screws marked
[200]. The front panel assembly can then be
removed. (Fig. 4)
12
[R20c]
[R30]
[R20a]
[R70]
[R40]
[R70] [R50] [R75]
IN
5/5
[R40]: Pan Head Screw 2.6X6 MFZN2BL (VC990500)
[R50]: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)
[R60]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600)
[R70]: Bind Head Tapping Screw-B 2.6X8 MFZN2BL (VB096700)
[R75]: Flat Fillister H. Tapping 3.0X8 MFZN2BL (V9568800)
3.
IN 1/5 シート(所要時間:約 5 分)
3-1
トップカバーを外します。 (1 項参照)
3-2
リア Ass' y を外します。 (2 項参照)
3-3
[R310]のネジ2本を外し、 SPターミナルカバーを
外します。 (Fig.2)
3-4
[R50]のネジ 1 本と、 [R60]のネジ 2 本、 [R70]のネジ 4
本、 [R75]のネジ 4 本を外し、IN1/5 シートを外しま
す。 (Fig.3)
4.
IN 4/5 シート(所要時間:約 5 分)
4-1
トップカバーを外します。 (1 項参照)
4-2
リア Ass' y を外します。 (2 項参照)
4-3
[40a]のネジ 4 本を外し、IN4/5 シートを外します。
(Fig.1)
5.
IN 5/5 シート(所要時間:約 3 分)
5-1
トップカバーを外します。 (1 項参照)
5-2
[R40]のネジ 2 本を外し、IN5/5 シートを外します。
(Fig.3)
IN
1/5
[R60]
[R75]
+ナベ小ネジ
      ボンディングBタイト
     
+バインドBタイト
      +バインドBタイト
   +平頭Bタイト
Fig.3
6.
フロントパネル Ass'y(所要時間:約 4 分)
6-1
サイドカバーL[190a]のネジ 3 本とサイドカバー R
[190b]のネジ3本を外し、 [200]のネジ2本を外し、 フ
ロントパネル Ass' y を外します。 (Fig.4)
[R10]

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