Dm Circuit Board; Djack Circuit Board; Ck Circuit Board; Removing Flash Memory Expansion Module - Yamaha TYROS4 Service Manual

2.

DM Circuit Board

(Time Required: About 8 minutes)
* If there is a fl ash memory expansion module inserted
into the expansion module socket, remove the four
(4) screws marked [S02A] to remove the DIMM cover
and loosen the two (2) screws marked [A] to remove
the fl ash memory expansion module, before going to
the procedure below. (Fig.1, Fig.3)
2-1 Separate the upper case unit and lower case unit.
(See procedure 1.)
* Be sure to remove the DM cover.
2-2 Remove the three (3) screws marked [S01B] and the
screw marked [S02B]. The DM circuit board can then
be removed. (Fig. 4)
* MAC (Media Access Control) address is stored in the
DM circuit board. If the DM circuit board is replaced,
MAC address will be changed.
• Rear View
LOWER CASE UNIT
POWER SWITCH
• Top View
ACIN
CONNECTOR
ASSEMBLY
[S03F]
[S11B]
AC LOWER FRAME
ASSEMBLY
3.

DJACK Circuit Board

(Time Required: About 10 minutes)
3-1 Separate the upper case unit and lower case unit.
(See procedure 1.)
3-2 Remove the DM circuit board. (See procedure 2.)
3-3 Remove the two (2) screws marked [S03B], seven (7)
screws marked [S04A] and two (2) hexagonal lock
screws marked [S21]. The DJACK circuit board can
then be removed. (Fig. 5)
* Install the screws on the rear panel side first to
install the DJACK circuit board.
[S04C]
POWER SUPPLY UNIT
[S03E] [S03F]
ANGLE
[S03F] [S03C]

• Removing Flash Memory Expansion Module

Loosen the screws with your hand.
Pull the module vertically out of the socket.
Female screw
Socket
Female screw
CN4
CK
Fig. 4
4.

CK Circuit Board

(Time Required: About 6 minutes)
4-1 Separate the upper case unit and lower case unit.
(See procedure 1.)
4-2 Remove the four (4) screws marked [S03C]. The CK
circuit board can then be removed. (Fig. 4)
[A]
Connector
Flash Memory
Expansion Module
Fig. 3
[S02B]
[S01B]
DM
Tyros4
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