Pnls Circuit Board; Pnr Circuit Board; Micvr Circuit Board; Usb Circuit Board, Wheel Assembly (Pitch Bend, Modulation) - Yamaha TYROS4 Service Manual

• Bottom View
WHEEL ASSEMBLY
(MODULATION)
WHEEL ASSEMBLY
(PITCH BEND)
[S05N]
[S05L]
MICVR
LCD Hook
Fig. 11
15.

PNR Circuit Board

(Time Required: About 9 minutes)
15-1 Separate the upper case unit and lower case unit.
(See procedure 1.)
15-2 Remove the four (4) screws marked [S05H]. The
protect sheet can then be removed. (Fig. 7)
15-3 Remove the two (2) screws marked [S05I]. The panel
stay (C) can then be removed. (Fig. 7)
15-4 Remove the fifteen (15) screws marked [S05J]. The
PNR circuit board can then be removed. (Fig. 7)
UPPER CASE UNIT
[S05N] [S05G]
[S05E]
Fig. 10
LCD UNIT
LCD UNIT
PNC
[S05F] PANEL STAY (B)
LCD UNIT
16.

PNLS Circuit Board

(Time Required: About 6 minutes)
16-1 Separate the upper case unit and lower case unit.
(See procedure 1.)
16-2 Remove the four (4) screws marked [S05K]. The PNLS
circuit board can then be removed. (Fig. 7)
17.

MICVR Circuit Board

(Time Required: About 6 minutes)
17-1 Remove the volume knob (MIC GAIN) and the MASTER
VOLUME knob from the control panel. (Fig. 6)
17-2 Separate the upper case unit and lower case unit.
(See procedure 1.)
17-3 Remove the five (5) screws marked [S05L]. The
MICVR circuit board can then be removed. (Fig. 10)
18. USB Circuit Board
(Time Required: About 6 minutes)
18-1 Separate the upper case unit and lower case unit.
(See procedure 1.)
18-2 Remove the four (4) screws marked [S05M]. The USB
circuit board can then be removed. (Fig. 10)
19. Wheel Assembly (PITCH BEND, MODULATION)
(Time Required: About 6 minutes)
19-1 Separate the upper case unit and lower case unit
(See procedure 1).
19-2 Remove the two (2) screws marked [S05N]. The wheel
assembly (PITCH BEND) can then be removed.
(Fig. 10)
* The wheel assembly (MODULATION) can be removed
in the same way.
Tyros4
[S05M]
USB
[S05M]
17