Yamaha Portatone PSR-VN300 Service Manual page 8

PSR-VN300
2. DMLCD circuit board
(Time required: About 3 minutes)
2-1 Remove the lower case assembly. (See procedure 1)
2-2 Remove the eight (8) screws marked [240B]. The DMLCD circuit board can then be removed. (Fig. 2)
* When installing the DMLCD circuit board, tighten the screws 1 through 8 in numerical order. (Fig. 2)
* If the DMLCD circuit board is replaced, execute the "Factory Set" in the test program.
• Bottom view
[30]
[240C]
Lower Case Keyboard Assembly
8
[A]
[150C]
PNAM
2/3
[150C]
[30] : Bind Head Tapping Screw-B 4x8 MFZN2W3 (WE974600)
[150A] : Bind Head Tapping Screw-B 3x8 MFZN2W3 (WE774300)
[150B] : Bind Head Tapping Screw-B 3x8 MFZN2W3 (WE774300)
[150C] : Bind Head Tapping Screw-B 3x8 MFZN2W3 (WE774300)
[240B] : Bind Head Tapping Screw-B 3x12 MFZN2W3 (WE987400)
[240C] : Bind Head Tapping Screw-B 3x12 MFZN2W3 (WE987400)
[270B] : Bind Head Screw 3x30 MFZN2W3 (WF491000)
Rubber Connector
Conductor side
Rubber Connector
Fig. 3
[240B] [150B] [150A]
3 4 5 6
PNAM
DMLCD
1/3
1 7 8 2
[270B] [240B] [150B]
Fig. 2
LCD
Back Light Assembly
Rubber Connector
DMLCD
LCD Holder
PNAM [30] [A]
[150B]
3/3
[240C]
Knob (Master Volume)
Fig. 4