Philips Fm2 Service Manual

Tools Required
Chapter 6 - Disassembly/Reassembly Guide
39
All part numbers and exploded views of some assemblies are found in 
Chapter 7,“Spare Parts”.
Tools Required
Caution
When reassembling, be sure to follow torque-limits instructions. Excessive 
torque may damage the plastic screw mountings or case.
The following tools are required:
small/medium, Phillips-head screwdriver
A torque-sensitive tool, with a torque range to 1.1 Nm (10 in-lb.); accuracy 
±0.1 Nm (±1 in-lb.)
needle-nose pliers or...

Closed Case Disassembly/Reassembly Procedures
40Chapter 6 - Disassembly/Reassembly Guide
Closed Case Disassembly/Reassembly Procedures
This section describes the items that may be removed without disassembling the 
main case of the monitor.
The speaker housing is attached to the back of the rear case. The speaker 
housing also acts as the battery cover. To gain access to the battery, first remove 
the speaker housing (see “Removing the Speaker Housing” on page 41).
Caution
Important for disassembly! When...

Closed Case Disassembly/Reassembly Procedures
Chapter 6 - Disassembly/Reassembly Guide
41
Removing the Speaker Housing 
Step 1. Place the monitor on its front panel, being careful not to place the unit 
on any surface that will damage the display.
Step 2. Using the Phillips-head screwdriver, unfasten the two screws securing 
the speaker housing. The speaker housing also acts as the battery cover.
Step 3. Gently lift the bottom (screw) end of the speaker cover just enough for 
the battery pad (attached to...

Closed Case Disassembly/Reassembly Procedures
42Chapter 6 - Disassembly/Reassembly Guide
Replacing the Speaker Housing 
Step 1. Connect the speaker cables by pushing the spade terminals onto the 
speaker terminals in the speaker housing. Check that they are secure. 
The wires are not coded for polarity, as the polarity is uncritical.
Step 2. Refit the speaker housing by sliding the two metal lugs at the top end 
of the speaker housing under the lip at the top of the battery housing 
aperture until it...

Closed Case Disassembly/Reassembly Procedures
Chapter 6 - Disassembly/Reassembly Guide
43
Removing the Battery 
Step 1. Place the monitor upside down so that its top is resting on the work 
surface. In this position, the monitor leans back at a convenient angle 
that allows easy removal of the battery with the aid of gravity.
Step 2. While the monitor is in this tilted position, the battery will normally 
fall partly out of its housing. If it does not, then apply a little pressure 
on the terminal-end of...

Closed Case Disassembly/Reassembly Procedures
44Chapter 6 - Disassembly/Reassembly Guide
Replacing the Battery 
Step 1. Connect the battery cables to the replacement battery, paying careful 
attention to cable polarity. Connect the red cable to the positive 
terminal, marked in red. Connect the black cable to the negative 
terminal, marked in black.
Step 2. Carefully place the new battery into the battery housing.
Step 3. Reconnect the speaker and refit the speaker assembly. (See “Replacing 
the Speaker...

Separation of Front and Rear Case Assemblies
Chapter 6 - Disassembly/Reassembly Guide
45
Separation of Front and Rear Case Assemblies  
Separation
This section describes the procedures required to separate the front and rear case 
assemblies of the FM-2 monitor.
Step 1. Remove the speaker housing (see “Removing the Speaker Housing” on 
page 41).
Step 2. Remove the battery (see “Removing the Battery” on page 43).
Step 3. Remove the four screws fastening the rear case assembly to the front 
case assembly...

Separation of Front and Rear Case Assemblies
46Chapter 6 - Disassembly/Reassembly Guide
Reassembly
Step 1. Ensure that the cables for the speaker and the battery are correctly 
routed and accessible from the rear of the case for later connection.
Step 2. Confirm that the patient connector PCB is firmly mated to the main 
PCB. (There should be no gap between the bottom of the patient 
connector PCB and the main PCB).
Step 3. Carefully align the groove in the connector panel with the edge of the...

Front Case Disassembly/Reassembly Procedures
Chapter 6 - Disassembly/Reassembly Guide
47
Front Case Disassembly/Reassembly Procedures 
This section describes how to remove/replace items from the front case assembly.
The front case assembly includes the replaceable molded front-case, the main 
PCB, the LCD assembly, the front-panel keypad and the navigation wheel.
First separate the front and rear case assemblies as described in the section 
“Separation of Front and Rear Case Assemblies” on page 45....

Front Case Disassembly/Reassembly Procedures
48Chapter 6 - Disassembly/Reassembly Guide
Replacing the Navigation Wheel 
Step 1. If the front case assembly has been disassembled, refit the LCD 
assembly (see “Replacing the LCD Assembly” on page 51) and the 
main circuit board (see“Replacing the Main PCB Assembly” on page 
52) to the front case assembly.
Step 2. Screw the 10 mm nut onto the threaded base of the encoder switch 
from the outside of the front bezel, initially by hand.
Caution
Do not...