Philips PM 5131 Mode D'emploi Et D'entretien page 33

4.2. ACCESS TO PARTS
4.2.1.
4.2.2.
4.2.3.
4.2.4.
Before dismantling the instrument, the safety regulations in accordance with para. 2.1. must be strictly
observed.
Cabinet, see 2.4.
Knobs
Remove the cap from the knob.
Unscrew the nut and remove the knob.
When replacing the knob, ensure that the white mark is correctly aligned with the text plate markings.
Text plate
Remove the cabinet, see 2.4.
Remove the turn-knobs, see 4.2.2.
Remove the dial.
Remove the plastic cover of the mains switch.
The text plate can now be removed.
Be careful:
The textplate is fitted to the frontplate by double sided adhesive tape.
Pushbutton unit
Replacing a pushbutton lever.
The single pushbutton lever can be replaced from the front.
Push the spring towards the pushbuttons.
Remove the wire strap or plastic part.
Carefully tear the pushbutton lever out of the pushbutton.
Replacing a switch of the pushbutton unit
Straighten the 4 retaining lugs of the relevant switches as shown in the figure below.
Break the body of the relevant switch by means of a pair of pliers and remove the pieces. The soldering
pins are then accessible.
Remove the soldering pins and clean the holes in the printed circuit board (e. g. with a suction sol-
dering iron).
Solder the new switch on to the printed circuit board.
Bend the 4 retaining lugs back to their original positions.