Philips Fm2 Service Manual

							Front Case Disassembly/Reassembly Procedures
Chapter 6 - Disassembly/Reassembly Guide
49
Removing the Main PCB Assembly from the Front Case Assembly 
Step 1. Remove the navigation wheel (see “Removing the Navigation Wheel” 
on page 47).
Step 2. Place the front case assembly with the bezel face down on the work 
surface. Take care not to damage the display.
Step 3. Disconnect the backlight power supply cable connector from J4 on the 
main PCB.
Step 4. Disconnect the keypad ribbon cable connector from J6 on the main 
PCB. To remove the cable from the connector, first release the locking 
cap to loosen the cable. Slide the cable out, leaving the cap loosely 
seated in the connector.
Step 5. Use a Phillips-head screwdriver to remove the screw holding the main 
PCB assembly in place in the front cover assembly.
Step 6. Remove the main PCB by gently pulling upwards to disconnect the 
multipin LCD assembly connector at J7 on the main PCB. Pull 
straight up to avoid bending the pins.
There are now three separate items:
Front case assembly
Rear case assembly
Main PCB assembly
Connector J7 is on the 
underside of the board here
Backlight power supply
at J4 on main PCB Keypad ribbon cable
at J6 on main PCB 
						

							Front Case Disassembly/Reassembly Procedures
50Chapter 6 - Disassembly/Reassembly Guide
Removing the LCD Assembly  
Warning
High voltage is generated by the LCD backlight driver. Do not operate the 
monitor with the covers open.
The Display Kit (M2922-64004) comes with a replacement display window, 
which should be replaced when the LCD assembly is replaced.
Step 1. Use a Phillips-head screwdriver to unfasten the four corner screws.
Step 2. Remove the LCD assembly, providing access to the display window.
Rear case
assembly
Front case
assembly
Main PCB
assembly
Main PCB
assemblyLCD assemblyScrews 
						

							Front Case Disassembly/Reassembly Procedures
Chapter 6 - Disassembly/Reassembly Guide
51
Step 3. Remove the display window by carefully prying up one corner and 
then peeling back.
Replacing the LCD Assembly  
Step 1. Fit the new display window with its gasket to the inside of the front 
bezel. The display window comes with its own double sided adhesive.
Step 2. Position the LCD assembly so that the holes in each corner align with 
the four screw mounts on the inside of the front bezel.
Step 3. Using a Phillips-head screwdriver, fasten the LCD assembly with the 
four fixing screws.
LCD
assembly Front bezel
Display
window 
						

							Front Case Disassembly/Reassembly Procedures
52Chapter 6 - Disassembly/Reassembly Guide
Replacing the Main PCB Assembly 
Step 1. If the LCD assembly has been removed, first replace it. (See “Replacing 
the LCD Assembly” on page 51).
Note—There are two notches on the main PCB, used for location 
purposes. One is at the patient connector panel end, and the other is on 
the opposite end. There are two corresponding guides in the front cover.
Step 2. Align the location notch at the patient connector end of the main PCB 
with the guide in the front cover, while keeping the opposite end of 
the main PCB slightly raised and clear of the LCD connector pins (J7 
on the main PCB).
Step 3. At this stage, check that the cables and connectors for the LCD 
backlight power supply and the front keypad do not get trapped 
underneath the main PCB, but are free and accessible from the side of 
the main PCB.
Step 4. With the guide in the front cover still located in the notch at the 
patient connector end of the main PCB, carefully align the connector 
J7 on the main PCB with the corresponding pins on the LCD 
assembly.
Step 5. Press down gently until the connector at J7 on the main PCB is fully 
seated on the pins on the LCD assembly. Check that the notch at the 
handle end of the main PCB aligns with the guide in the front cover, 
and that the fixing holes in the main PCB align with the four screw 
mounts in the front cover. This will confirm that the J7 connector is 
correctly located. Also check that the navigation wheel shaft is centred 
in the hole in the plastic bezel recess, so that the refitted wheel does not 
bind with the case.
Step 6. Using a Phillips-head screwdriver, fasten the fixing screw to the screw 
mount in the front cover at the handle end, nearest to the navigation 
wheel/encoder switch. 
						

							Front Case Disassembly/Reassembly Procedures
Chapter 6 - Disassembly/Reassembly Guide
53
Step 7. Reconnect the backlight power supply connector to J4 on the main 
PCB. It is only possible to fit the connector one way round.
Step 8. Reconnect the keypad ribbon connector by inserting the ribbon cable 
fully into the connector at J6 on the main PCB through the locking 
cap which was left loosely fitted to the connector during disassembly. 
Slide the locking cap forward to secure the ribbon cable.
Notch
& guideNotch &
guide
 
Keypad ribbon cableBacklight
power
connector
& connector Main PCB screw
fixing 
						

							Front Case Disassembly/Reassembly Procedures
54Chapter 6 - Disassembly/Reassembly Guide
Removing the Keypad 
The keypad is attached to a recess in the front cover assembly by an integral 
double sided adhesive.
Step 1. From the face of the front bezel, carefully pry up one corner of the 
keypad, then peel it away from the front cover.
Note—The keypad is made up of a number of different layers, which may 
separate during removal. Ensure that all layers are removed completely 
before a replacement is fitted.
Replacing the Keypad 
Step 1. Ensure that the recess in the front bezel for the keypad is clean.
Step 2. Thread the ribbon cable through the slot in the front cover.
Step 3. Carefully align one end of the keypad with the corresponding edge of 
the recess in the front bezel, and carefully stick the keypad down, 
working from one end to the other to avoid air bubbles. 
						

							Rear Case Disassembly Procedures
Chapter 6 - Disassembly/Reassembly Guide
55
Rear Case Disassembly Procedures
This section describes the items that may be removed/replaced on the rear case 
assembly of the monitor. First separate the front and rear assemblies as described 
in the section “Separation of Front and Rear Case Assemblies” on page 45.
Removing the Rear Connector PCB and the Interface Board    
The interface PCB is connected at right angles to the rear connector PCB, and is 
separable from it.
Step 1. From outside the rear cover, use a 3/16 socket driver to remove the 
two standoff fasteners of the RS-232 connector, and also the two 
standoff fasteners of the parallel connector.
Step 2. From inside the rear cover, remove the rear connector PCB and the 
interface PCB connected to it.
 
Standoff
fasteners 
						

							Rear Case Disassembly Procedures
56Chapter 6 - Disassembly/Reassembly Guide
Removing the Interface PCB from the Rear Connector PCB  
Step 1. Using a Phillips-head screwdriver, remove the two screws on the 
connector side of the connector PCB.
Step 2. Separate the two boards by disconnecting the two multi-pin 
connectors at J1 and J2 on the rear connector PCB. Ensure that you 
pull straight, with no twisting action, so that the pins do not get bent.
Replacing the Interface PCB on the Rear Connector PCB 
The refitting procedure is the reverse of the removal procedure.
ScrewsRear connector
board
Interface board
Interface
board
Rear connector
board 
						

							Rear Case Disassembly Procedures
Chapter 6 - Disassembly/Reassembly Guide
57
Replacing the Rear Connector/Interface PCB Assembly
Step 1. Place the rear connector/interface PCB assembly into the dedicated 
recess inside the rear case assembly. See that the RS-232, parallel and 
power supply connectors fit into their respective slots in the rear case.
Step 2. From outside the rear case, use a 3/16 socket driver to refit the two 
standoff fasteners of the RS-232 connector, and the two standoff 
fasteners of the parallel port to secure the rear connector PCB in place.
Step 3. Ensure that the speaker cable connector is secure on the interface PCB. 
Check that the two pins on the board are perpendicular to the board, 
or leaning slightly towards the connector latch. This will ensure a firm 
connection.
Step 4. Route the cables for the speaker and the battery.
Speaker cable connector
Connector latch 
						

							Rear Case Disassembly Procedures
58Chapter 6 - Disassembly/Reassembly Guide
Removing the Handle 
Each end of the handle is a friction fit on a cross-shaped boss.
Step 1. Use flat-bladed screwdriver to carefully pry one end of the handle.
Step 2. When the end of the handle has begun to loosen from the boss, use the 
same technique to begin to pry up the other end.
Step 3. Alternately apply this prying action between each end of the handle 
until the handle is free of the rear case.
Removing the Foot Cushions 
The foot cushions are attached with an adhesive to the bottom surface of the 
rear cover, and can be removed by lifting one end of the foot and peeling off.
Foot cushions