Yamaha Portatone PSR-VN300 Service Manual page 9

3. LCD (Time required: About 3 minutes)
3-1 Remove the lower case assembly. (See procedure 1)
3-2 Remove the DMLCD circuit board. (See procedure 2)
3-3 Remove the LCD holder and rubber connector. (Fig. 3)
3-4 Remove the back light assembly. (Fig. 3)
3-5 Remove the LCD. (Fig. 3)
* When attaching the rubber connector, set the conductive part to face inside. (Fig. 3)
4. PNAM Circuit Board (1/3, 2/3, 3/3)
4-1 Remove the lower case assembly. (See procedure 1)
4-2 PNAM Circuit Board 3/3
(Time required: About 2 minutes)
4-2-1 Remove the volume knob from the control panel surface. (Fig. 1, 4)
4-2-2 Remove the three (3) screws marked [150A]. The PNAM circuit board 3/3 can then be removed. (Fig. 2)
4-3 PNAM Circuit Board 1/3
(Time required: About 3 minutes)
4-3-1 Remove the PNAM circuit board 3/3. (See procedure 4-2)
4-3-2 Remove the twelve (12) screws marked [150B]. The PNAM circuit board 1/3 can then be removed. (Fig. 2)
4-4 PNAM circuit board (2/3)
(Time required: About 3 minutes)
4-4-1 Remove the nine (9) screws marked [150C]. The PNAM circuit board 2/3 can then be removed. (Fig. 2)
5. Speaker (Time required: About 3 minutes)
5-1 Remove the lower case assembly. (See procedure 1)
5-2 Remove the four (4) screws marked [30]. The speaker can then be removed. (Fig. 2)
* The right and left speakers can be removed in the same manner.
6. SP Grille (Time required: About 3 minutes)
6-1 Remove the lower case assembly. (See procedure 1)
6-2 Align the four (4) [A]s the groove in the upper case assembly and remove the SP grille. (Fig. 2)
* The right and left SP grilles can be removed in the same manner.
7. Lower Case Keyboard Assembly
(Time required: About 2 minutes)
7-1 Remove the lower case assembly. (See procedure 1)
7-2 Remove the two (2) screws marked [240C] and screw marked [270B].
The lower case keyboard assembly can then be removed. (Fig. 2)
PSR-VN300
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