HP-535 Nov. 1998 KEYBOARD DISASSEMBLY Installing the PA-4A board Removing PA-4A key As shown in Fig.3, place the board against the hook part a of the sub-shassis, and screw the board into the sub-shassis. Screw in order, from the round hole(positioning hole) on the While holding the front end of the key, insert the tip of long-nose pliers into the U-groove on the shaft side(shaded area in Fig.1) and connector side. Be sure to screw manually. (Care should be taken to avoid screw hold down the key in the direction of arrow A.
damage.) Fig.3 Fig.1 Greasing points After the key or hammer has been replaced, the specified grease Installing the PA-4A key must be applied to the following 4 points as shown in Fig.4. While placing the front inner wall of the key against the guide, pass Fig.4 the foot through the hole of the chassis, as shown in Fig.2. Then press the dotted area of the key in the direction of arrow. 1. Froir GP-1RS....gray (PNo. 17049544) (a) Key and hammer bearing section (b) Key and hammer joint section (actuator section) 2. Froir G-336A....white (PNo. 17049543) (a) Side of guide bushing for white key and black key 1-a 2-a Fig.2 1-b Fig.4 19