Disassembly Procedure - Yamaha Portatone PSR A1000 Service Manual

PSR-A1000

DISASSEMBLY PROCEDURE

Caution: Be sure to attach the removed filament tape just as it was before removal.
1. Lower Case Assembly
(Time required: About 5 minutes)
1-1 Remove the sixteen (16) screws marked [240] and the two
(2) screws marked [250A]. The lower case assembly can
then be removed. (Fig. 1)
2. HP Circuit Board
(Time required: About 10 minutes)
2-1 Remove the lower case assembly. (See procedure 1.)
2-2 Remove the three (3) screws marked [270A]. The HP cir-
cuit board can then be removed. (Fig. 2)
3. Wheel Assembly, PB1 Circuit Board
(Time required: About 10 minutes)
3-1 Remove the lower case assembly. (See procedure 1.)
3-2 Remove the two (2) screws marked [520A]. The PB1 cir-
cuit board with the wheel assembly can then be removed.
(Fig. 2)
3-3 Remove the wheel assembly from the PB1 circuit board.
(Fig. 2)
[270E]
Tweeter R
[250B]
Shield cover L
[30]: Bind Head Tapping Screw-P 3.0x16 MFZN2BL (EP630220)
[50]: Bind Head Tapping Screw-P 4.0x16 MFZN2Y (VM839600)
[100]: Bind Head Tapping Screw-P 4.0x10 MFZN2Y (EP640500)
[250B]: Bind Head Tapping Screw-P 3.0x25 MFZN2Y (VK228100)
8
Woofer R Floppy disk drive assembly
[100A] [270B]
[270B] [260A]
INV
[260B]
[270B]
[260B] Keyboard assembly
[240] Lower case assembly
[240]
[240]: Bind Head Tapping Screw-P 3.0x12 MFZN2Y (EP600300)
[250A]: Bind Head Tapping Screw-P 3.0x25 MFZN2Y (VK228100)
[50]
[260B] Tweeter L
[250B]
[260B]
MKS5F
[30]
[260]: Bind Head Tapping Screw-B 3.0x6 MFZN2Y (EP600130)
[270]: Bind Head Tapping Screw-P 3.0x8 MFZN2Y (EP600280)
[340]: Flat Head Tapping Screw-B 3.0x8 MFZN2Y (EP600420)
[520A]: Bind Head Tapping Screw-P 3.0x8 MFZN2Y (EP600280)
(Fig. 2)
[240]
[250A]
[240] [240]
(Fig. 1)
Woofer L
[100A]
[270E]
[340]
SW
Wheel assembly
PB1
[520A]
[270A]
HP