Vr Circuit Board; Enc Circuit Board - Yamaha portatone psr 1100 Service Manual

PSR-1100/PSR-2100
15. VR, ENC, PN1, PN2, PN3, PN4 Circuit Boards
and LCD
15-1 Remove the lower case assembly. (See procedure 1.)
15-2 Remove the shield cover L, the DM circuit board and the
shield cover U. (See procedure 13.)
15-3 Remove the AM circuit board. (See procedure 14.)
15-4

VR Circuit Board

(Time required: about 10 minutes):
15-4-1 Remove the volume knob from the control panel side. (Fig. 6)
15-4-2 Remove the three (3) screws marked [270F]. The VR cir-
cuit board can then be removed. (Fig. 7)
* When you install the VR circuit board, tighten the screws
in order as shown in Figure 7.
Volume knob
Fig. 6
[510E]
[510E]
[510D]
Keyboard support (A)
[270F]: Bind Head Tapping Screw-P 3.0x8 MFZN2Y (EP600280)
[510]: Bind Head Tapping Screw-P 3.0x8 MFZN2Y (EP600280)
* This figure shows the PSR-1100.
PSR-1100
15-5

ENC Circuit Board

(Time required: about 10 minutes):
15-5-1 Remove the encoder knob from the control panel side.
(Fig. 8)
15-5-2 Remove the hexagonal nut marked [A]. The ENC circuit
board can then be removed. (Fig. 9)
Fig. 8
14
6
PN1 [510E]
[510C] [510C] [510E]
[510G]
(A)
Panel angle bracket DM holder
PN DM
Encoder knob
8
This screwing would be first.
LCD
[510I] [510J]
[510K]
[510I]
[510F]
[510G] [510I]
PN2 PN3
Keyboard support (B)
Fig. 7 7
VR
[270F]
PN4
VR
[510H]
(B)
P
P
[A]
ENC
Fig. 9 9
[510I]