Philips M3921A Service Manual page 83

Chapter 6 - Disassembly Guide
Procedure to remove the speaker:
1. Remove the retaining spring clip.
2. Remove the speaker.
3. Orient the speaker wires towards the handle (as shown in the
photograph).
Procedure to remove the wheel and encoder:
1. From the front, remove the wheel by grasping the sides of the wheel
firmly and pulling straight back from the monitor. (The wheel is friction
fit on the stem of the encoder assembly).
If the wheel is not easily removable by hand, a small flat-headed
screwdriver can be used to gently pry off the wheel. If necessary, apply
some adhesive tape to the front cover and the head of the screwdriver to
prevent any damage.
2. Use a 9/16" hex socket to unscrew the fastening nut on the outside of the
front case. The encoder can now be pulled away from the front case.
During reassembly, orient the ribbon connector so that the cable lies
parallel to the bottom of the board and pin 1 is oriented close to the
handle.
Spare
wheel
Disassembly Procedures (A1)
Handle
Spare
speaker,
leads
attached
Nut
Encoder
assembly
71