Amjk - Yamaha KB-180 Service Manual

KB-180/SKB-180
5. DMLCD Circuit Board, Back Light Assembly
and LCD
(Time required: About 4 minutes)
5-1 Remove the lower case assembly. (See procedure 1.)
5-2 Remove the LCD unit. (See procedure 4.)
5-3 Remove the eight (8) screws marked [L100]. The
DMLCD circuit board can then be removed from
the LCD unit. (Fig. 7)
5-4 Remove the LCD, back light assembly and rubber
connectors from the LCD panel. (Fig. 7)
* When attaching the rubber connector to the
LCD panel, set the conductor side to face in-
ward. (Fig. 8)
* When installing the DMLCD circuit board, tight-
en the screws 1 through 8 in numerical order
as shown in Fig. 9. (Fig. 9)
If the DMLCD circuit board is replaced, execute
the "Factory Set" in the test program.
[L100]
[L100]: Bind Head Tapping Screw-P 3.0X12 MFZN2W3 (WE972900)
<Bottom view>
Upper case assembly
10
Nonwoven fabric cloth
LCD panel
LCD
Back light assembly
Rubber connector
LCD holder
DMLCD
Fig. 7
[210J]
[210J] [210J]
PNR
(PN 1/6)
[210]: Bind Head Tapping Screw-B 3.0X8 MFZN2W3 (WE774300)
6. MIDI Circuit Board
(Time required: About 6 minutes)
6-1 Remove the lower case assembly. (See procedure 1.)
6-2 Remove the four (4) screws marked [210G]. The
MIDI circuit board can then be removed. (Fig. 6)
7. PNL Circuit Board
(Time required: About 6 minutes)
7-1 Remove the lower case assembly. (See procedure 1.)
7-2 Remove the AM circuit board. (See procedure 3.)
7-3 Remove the eleven (11) screws marked [210H]
and two (2) screws marked [210I]. The PNL circuit
board can then be removed. (Fig. 10)
[210H]
[210K] [210K] [210H]
PNR PNL
(PN 3/6) (PN 2/6)
Fig. 10
Rubber connector
Conductor side
Rubber connector
Fig. 8
3 4 5 6
DMLCD
1 7 8 2
Fig. 9
PNL
[210H]
(PN 4/6)
PB

(AMJK 6/6)

[210I]
[210N]