Tweeter (Psr-1000); Tweeter (Psr-2000); Woofer (Psr-2000); 5-3 Remove The Red Knob From The Sw Circuit Board - Yamaha Portatone PSR 1000 Service Manual

5. SW Circuit Board
(Time required: About 10 minutes)
5-1 Remove the lower case assembly. (See procedure 1.)
5-2 Remove the two (2) screws marked [340]. The SW circuit
board can then be removed. (Fig. 2)
5-3 Remove the red knob from the SW circuit board.
6.

Tweeter (PSR-1000)

(Time required: About 10 minutes)
6-1 Remove the lower case assembly. (See procedure 1.)
6-2 Remove the two (2) screws marked [270B]. The tweeter
can then be removed. (Fig. 2)
* The left and right tweeters can be removed in the respectively
same method.
7.

Tweeter (PSR-2000)

(Time required: About 10 minutes)
7-1 Remove the lower case assembly. (See procedure 1.)
7-2 Remove the two (2) screws marked [290]. The tweeter can
then be removed. (Fig. 2)
* The left and right tweeters can be removed in the respectively
same method.
8. Woofer (PSR-1000)
(Time required: About 10 minutes)
8-1 Remove the lower case assembly. (See procedure 1.)
8-2 Remove the four (4) screws marked [100A]. The woofer
can then be removed. (Fig. 2)
* The left and right woofers can be removed in the respectively
same method.
9.

Woofer (PSR-2000)

(Time required: About 10 minutes)
9-1 Remove the lower case assembly. (See procedure 1.)
9-2 Remove the four (4) screws marked [100B]. The woofer and
the four (4) speaker holders can then be removed. (Fig. 2)
* The left and right woofers can be removed in the respectively
same method.
10. Floppy Disk Drive
(Time required: About 10 minutes)
10-1 Remove the lower case assembly. (See procedure 1.)
10-2 Remove the four (4) screws marked [50]. The floppy disk
drive assembly can then be removed. (Fig. 2)
10-3 Remove the four (4) screws marked [F40]. The left and right
FDD holders can then be removed from the floppy disk
drive. (Fig. 3)
11. Keyboard Assembly
(Time required: About 10 minutes)
11-1 Remove the lower case assembly. (See procedure 1.)
11-2 Remove the two (2) screws marked [250B]. The keyboard
assembly can then be removed. (Fig. 2)
12. INV Circuit Board
(Time required: About 10 minutes)
ATTENTION: High Voltage
12-1 Remove the lower case assembly. (See procedure 1.)
12-2 Remove the four (4) screws marked [260A]. The INV
circuit board can then be removed. (Fig. 2)
13. DM Circuit Board, Shield Cover L and U
(Time required: About 15 minutes)
13-1 Remove the lower case assembly. (See procedure 1.)
13-2 Remove the INV circuit board. (See procedure 12.)
13-3 Remove the eight (8) screws marked [260B] and the five
(5) screws marked [270C]. The shield cover L can then be
removed. (Fig. 2)
13-4 Remove the four (4) screws marked [260C]. The DM
circuit board can then be removed. (Fig. 4)
13-5 Remove the screw marked [270D]. The shield cover U can
then be removed. (Fig. 4)
Floppy disk drive
[F40]: Bind Head Tapping Screw 3.0x6 MFZN2BL (EG330360)
[260C]
[260C]
[260C]: Bind Head Tapping Screw-B 3.0x6 MFZN2Y (EP600130)
[270D]: Bind Head Tapping Screw-P 3.0x8 MFZN2Y (EP600280)
(Fig. 4)
PSR-1000/PSR-2000
[F40]x4
FDD holder R
(Fig. 3)
[260C]
DM
[270D]
Shield cover U [260C]
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