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*
When installing the 61L circuit board (MK-L), tighten
the screws 1 through 12 in numerical order as shown
in the figure "61L" in Fig.10. (Fig.10)
11-7 61H Circuit Board (MK-H)
(Time required: About 6 minutes)
11-7-1 Remove the white and black keys from C4 to C6. (See
Fig.8 and Procedure 11-4.)
11-7-2 Remove the three (3) screws marked [100B] and the five
(5) screws marked [110B]. The 61H circuit board (MK-
H) can then be removed. (Fig.8)
*
When installing the 61H circuit board (MK-H),
tighten the screws 1 through 8 in numerical order as
shown in the figure "61H" in Fig.10. (Fig. 10)
9
2
3
61H
Photo.1
61L
10
11
4
5
6
7
Fig.10
Rubber contact
61H
12
6
8
1
1
3
PSR-S550/PSR-S550B
7
8
4
5
2
15
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