Yamaha Portatone PSR-260 Service Manual page 8

PSR-260/262
4. MIDI Circuit Board
4-1 Remove the bottom case assembly. (See procedure 1.)
4-2 Remove the two (2) screws marked [220b]. Then the
MIDI circuit board can then be removed. (Fig. 3)
5. PN Circuit Board
5-1 Remove the bottom case assembly. (See procedure 1.)
5-2 Remove the M circuit board. (See procedure 2.)
5-3 Remove the eighteen (18) screws marked [220c].
Then the PN circuit board can then be removed.
(Fig. 3)
8
[220c]
[L50]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
[220]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
[250]: Bind Head Tapping Screw-P 4.0 x 8 MFZN2BL (VB931600)
(Fig. 3)
Volume knob
(Fig. 4)
6. VR Circuit Board
6-1 Remove the MASTER VOLUME knob on the con-
trol panel. (Fig. 4)
6-2 Remove the bottom case assembly. (See procedure 1.)
6-3 Remove the M circuit board. (See procedure 2.)
6-4 Remove the three (3) screws marked [220d]. Then
the VR circuit board can then be removed. (Fig. 3)
7. PW Circuit Board
7-1 Remove the bottom case assembly. (See procedure 1.)
7-2 Remove the M circuit board. (See procedure 2.)
7-3 Remove the two (2) screws marked [220e]. Then the
PW circuit board can then be removed. (Fig. 3)
7-4 Pull off the knob from the PW circuit board.
[220b]
[220c] [220d] [220e]