Power Supply Unit; Ajk Circuit Board; Inlet Circuit Board; Ck Circuit Board - Yamaha TYROS 2 Service Manual

6.

Power Supply Unit

(Time required: About 6 minutes)
6-1 Separate the unit into the upper case assembly and the
lower case assembly. (See procedure 1.)
6-2 Remove the three (3) screws marked [140A] and the
screw marked [150]. The AC upper frame assembly can
then be removed. (Fig.3)
6-3 Remove the six (6) screws marked [530D]. The power
supply unit can then be removed. (Fig.4)
7.

AJK Circuit Board

(Time required: About 6 minutes)
7-1 Separate the unit into the upper case assembly and the
lower case assembly. (See procedure 1.)
7-2 Remove the four (4) screws marked [530A]. The AC
lower frame cover assembly can then be removed.
(Fig.4)
7-3 Remove the knob(MIC.TRIM) marked [150]. (Fig.4)
7-4 Remove the four (4) screws marked [530B] and the six
(6) screws marked [540B]. The AJK circuit board can
then be removed. (Fig.4)
8.

INLET Circuit Board

(Time required: About 6 minutes)
8-1 Separate the unit into the upper case assembly and the
lower case assembly. (See procedure 1.)
8-2 Remove the two (2) screws marked [140B]. The inlet
lower box can then be removed. (Fig.3,Fig.4)
8-3 Remove the two (2) screws marked [530C] and the three
(3) screws marked [540C]. The inlet upper box can then
be removed. (Fig.4)
8-4 Remove the screw marked [530] and the two (2) screws
marked [540]. The INLET circuit board can then be
removed. (Fig.6)
* When installing the inlet upper box, tighten the three (3)
screws marked [540C] first, and then tighten the two (2)
screws marked [530C]. (Fig.4)
[530]
INLET
[540]
Inlet Upper Box
(Fig.6)
9.

CK Circuit Board

(Time required: About 4 minutes)
9-1 Separate the unit into the upper case assembly and the
lower case assembly. (See procedure 1.)
9-2 Remove the four (4) screws marked [530H]. The CK
circuit board can then be removed. (Fig.5)
10.

SPOL Circuit Board

(Time required: About 4 minutes)
10-1 Separate the unit into the upper case assembly and the
lower case assembly. (See procedure 1.)
10-2 Remove the two (2) screw marked [540D]. The SPOL
circuit board can then be removed. (Fig.4)
11.

SPOR Circuit Board

(Time required: About 4 minutes)
11-1 Separate the unit into the upper case assembly and the
lower case assembly. (See procedure 1.)
11-2 Remove the two (2) screw marked [540E]. The SPOR
circuit board can then be removed. (Fig.4)
12.

HP Circuit Board

(Time required: About 4 minutes)
12-1 Separate the unit into the upper case assembly and the
lower case assembly. (See procedure 1.)
12-2 Remove the three (3) screws marked [530H]. The HP
circuit board can then be removed. (Fig.5)
Tyros2
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