Yamaha Tyros3, Service Manual

Page: 16 / 213

Tyros3
16
ENCODER KNOB
13. PNL Circuit Board
(Time Required: About 10 minutes)
13-1 Remove the slider knob (ASSIGN) from the control
panel. (Fig. 1)
13-2 Separate the upper case unit and lower case unit.
(See procedure 1.)
13-3 Remove the four (4) screws marked [S05A]. The two (2)
panel stays A can then be removed. (Fig. 6)
13-4 Remove the twenty-two (22) screws marked [S05B].
The PNL circuit board can then be removed. (Fig. 6)
14. EN Circuit Board
(Time Required: About 6 minutes)
14-1 Remove the encoder knob from the control panel
(Fig. 1, Fig. 7).
14-2 Separate the upper case unit and lower case unit.
(See procedure 1.)
14-3 Remove the three (3) screws marked [S05C]. The ENC
assembly can then be removed. (Fig. 9)
14-4 Remove the hexagonal nut marked [A] and the washer
marked [B]. The ENC stay can then be removed. (Fig. 8)
UPPER CASE UNIT
PANEL STAY A PANEL STAY C PROTECT SHEET
PANEL STAY A
• Bottom View
PNLS
PNL
PNR
[S05K]
[S05B]
[S05B] [S05A]
[S05B]
[S05A]
[S05B]
[S05H] [S05J]
[S05J]
[S05J] [S05I]
Fig. 6
[S05]: BIND HEAD TAPPING SCREW-B 3.0X10 MFZN2W3 (WE774200)
15. PNC Circuit Board
(Time Required: About 8 minutes)
15-1 Remove the eight (8) slider knobs (ASSIGN) and the
encoder knob from the control panel. (Fig. 1)
15-2 Separate the upper case unit and lower case unit.
(See procedure 1.)
15-3 Remove the ENC assembly. (See procedure 14-3)
15-4 Release the lock at the back of the LCD unit, open the
LCD unit and remove the screw marked [S05D] which
has been hidden. (Fig. 9, 10)
15-5 Remove the fi ve (5) screws marked [S05E], the screw
marked [S05F], the screw marked [S05G] and the panel
stay B. The PNC circuit board can then be removed.
(Fig. 9)
16. PNR Circuit Board
(Time Required: About 9 minutes)
16-1 Separate the upper case unit and lower case unit.
(See procedure 1.)
16-2 Remove the four (4) screws marked [S05H] and the
protect sheet. (Fig. 6)
16-3 Remove the two (2) screws marked [S05I]. The panel
stay C can then be removed. (Fig. 6)
16-4 Remove the fifteen (15) screws marked [S05J]. The
PNR circuit board can then be removed. (Fig. 6)
Fig. 7
[B] Washer
ENC STAY
• ENC Ass’y
EN
[A] Hexagon Nut
Fig. 8