Philips Fm2 Service Manual

							List of Figures
List of Figuresxi
Figure 1 FM-2 Block Diagram of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2 Error Log  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 3 System A/D Values  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 4 Diagnosing Malfunction - Initial Diagnosis . . . . . . . . . . . . . . . . . . . . . 32
Figure 5 Power Diagnosis - Power Supply or Display  . . . . . . . . . . . . . . . . . . . 33
Figure 6 Monitoring Degradation, Diagnostic Flow Chart . . . . . . . . . . . . . . . . 35
Figure 7 Assembly Drawing (Sheet 1) - Top Level Assembly . . . . . . . . . . . . . . 71
Figure 8 Assembly Drawing (Sheet 2) - Front Case Assembly . . . . . . . . . . . . . 72
Figure 9 Assembly Drawing (Sheet 3) - Rear Case Assembly  . . . . . . . . . . . . . 73
Figure 10 Assembly Drawing (Sheet 4) - Interface PCB/Rear Connector PCB 74
Figure 11 Assembly Drawing (Sheet 5) - Side Connector PCB/Panel/Label  . . 75
Figure 12 Testing a Toco Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Figure 13 Testing an Ultrasound Transducer  . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Figure 14 Position Of Crystals in an Ultrasound Transducer  . . . . . . . . . . . . . . 93
Figure 15 Testing the Crystals in an Ultrasound Transducer  . . . . . . . . . . . . . . 93 
						

							Chapter 1 - General Information1
1
General Information
Introduction
This guide tells you how to service and repair the monitor (M2922A). It 
describes the system hardware and software, tells you how to diagnose operating 
and servicing problems, and how to test the system.
As this monitor is intended to be installed by the customer, refer to the 
Instructions for Use for details of how to install the monitor.
The FM-2 Antepartum Fetal Monitor Service Guide supplements the 
maintenance and troubleshooting procedures carried out by the operator that 
are described in the Instructions for Use. Refer to the Instructions for Use for 
maintenance and troubleshooting procedures that may be performed during 
normal operation.
Any other maintenance and repair procedures beyond the level covered in the 
Instructions for Use are limited to replacement of:
• the battery
 three board assemblies inside the case (but excluding the main PCB)
the speaker
 components of the LCD display installed in the front case assembly
The features available on the monitor you are servicing depend on which 
accessories were purchased. As this manual covers all accessories, consult your 
configuration listing to see which apply to your monitor.
As the only support strategy for the Recorder is unit exchange, in the event of a 
malfunction or failure, no repair or servicing information for it is included in 
this manual. For routine care and maintenance, refer to the Instructions for Use.
Only qualified service personnel should attempt to disassemble the monitor, or 
to remove or replace any internal assemblies. 
						

							Repair Strategy
2Chapter 1 - General Information
Who Should Read This Guide
This guide is for any technical personnel servicing and repairing the FM-2 
monitor (M2922A).
Yo u  m u s t :
understand English
be familiar with standard medical equipment installation procedures
be familiar with current conventional technical terms as used throughout 
this guide
What to Do Next
Familiarize yourself with the contents of this guide before attempting to service 
or repair the monitor.
Repair Strategy
Reading operating error messages and the error log helps to determine whether a 
fault is a hardware or software problem. Fault rectification is accomplished by 
replacement of the defective part at the assembly level. For example, faults may 
be repaired by replacement of a complete board where the fault is identified, or 
by exchanging the monitor.
Repair or replacement of individual components on the boards is not supported, 
and should never be attempted.
There are no servicing instructions in this manual for the Recorder (M2925A) as 
a repair is effected by exchanging the unit only.
After any repairs you must carry out the following tests:
Power-On Self-Test (see “FM-2 Power-On Self-Test” on page 20)
Performance tests (see “Te s t i n g  Tr a n s d u c e r s” on page 90)
Safety tests after repair (see “Safety Testing” on page 84) 
						

							Warnings, Cautions, and Notes
Chapter 1 - General Information
3
Warnings, Cautions, and Notes
This guide uses three terms that are important for proper servicing of the 
monitor: Warning, Caution, and Note.
Warning
A warning calls your attention to an action or a possible situation that may 
result in injury or death to you or the patient.
Caution
A caution precedes an action that may result in damage to, or malfunction 
of the monitor. It indicates that special care is necessary for the safe and 
effective servicing of the monitor.
Note—A note calls your attention to an important point in the text.
On your monitor, this sign indicates that there is 
detailed information in this book and the 
Instructions for 
Use
 which you must read before proceeding with your 
task. 
						

							Symbols and Definitions
4Chapter 1 - General Information
Symbols and Definitions
Symbol DefinitionSymbolDefinition
Remote marker input 
connector symbol on 
monitorClass II equipment symbol 
(double insulation)
Drip-proof equipment 
classification on monitorType BF applied part 
symbol on monitor
Power input symbol on 
power supplyRefer to accompanying 
documents
Power supply connector 
symbol on monitorRS-232 connector (symbol 
on monitor housing)
Power supp ly  output 
connector on power supplyRS-232 connector (symbol 
on monitor label)
Functional earth symbol on 
power supplyPrinter connection symbol 
on monitor
Indoor use only symbol
on power supply
220-240V~
50-60 Hz,
0.08A
15V ∼ 1ARS-232
15V ∼ 1A 
						

							Packing for Shipment
Chapter 1 - General Information
5
Packing for Shipment 
General Instructions
To ship the monitor for any reason, follow the instructions in this section.
Pack the monitor carefully. Failure to follow the instructions in this section may 
result in loss or damage not covered by the warranty. If the original shipping 
carton is not available, use another suitable carton.
Repacking in Original Carton
If available, use the original carton and packing materials. Pack the monitor as 
follows:
1. Place the monitor and, if necessary, accessory items in original packaging.
2. Place in shipping carton and seal carton with packaging tape.
3. Label carton with shipping address and return address.
Repacking in a Different Carton
If the original carton is not available, use the following procedure to pack the 
monitor.
1. Place the monitor in a plastic bag.
2. Locate a corrugated cardboard shipping carton with at least 200 pounds 
per square inch (psi) bursting strength.
3. Fill the bottom of the carton with at least 2 inches of packing material.
4. Place the bagged unit on the layer of packing material and fill the box 
completely with packing material.
5. Seal the carton with packing tape.
6. Label the carton with the shipping address and return address. 
						

							Overview Of The Device
6Chapter 1 - General Information
Overview Of The Device
General Description
The device description included in this chapter focuses on the functional 
performance of the replaceable assemblies that may be identified as the probable 
cause of an apparent malfunction.
Refer to the Instructions for Use for information about the operation of the 
monitor and of the Recorder. That manual includes descriptions of the 
installation and setup of the monitor, modes of operation, recording of real-time 
patient data, and transmission of patient data to local or remote PCs. 
						

							Overview Of The Device
Chapter 1 - General Information
7
Block Diagram of Operation
Figure 1 illustrates the functional operation of the monitor, including the 
accessories and options. It incorporates features of the mechanical design, 
indicating the physical relationship of the assemblies and components.
Figure 1 FM-2 Block Diagram of Operation 
						

							Mechanical Description
8Chapter 1 - General Information
Mechanical Description
As indicated in Figure 1, except for the battery, speaker, interface board, and rear 
connector board, all functioning components of the monitor are installed as sub-
assemblies of the case front-cover assembly. There are four sockets (event marker, 
Toco and two US) accessible on the left side panel. These are mounted on a side 
connector PCB, which is itself mounted on the main PCB.
The case rear-cover assembly includes the replaceable battery and the speaker 
assembly. The rear cover provides openings through which the three rear 
connector board-mounted connectors (serial, parallel and power input) are 
accessible. Additional mechanical features are included in 
Chapter 6,“Disassembly/Reassembly Guide”.
LCD and Backlight 
The LCD panel is a monochrome LCD display. It is a single-panel display with 
a resolution of 320 X 240 pixels. Data to be displayed are stored in the main 
board. Direct connection to the LCD panel is made through on-board header 
assembly J7.
The backlight of the LCD is a Cold Cathode Fluorescent Lamp (CCFL) 
mounted as part of the LCD panel. The AC high-voltage is turned on and off by 
a digital control bit from the main-board-mounted drive.
Serial I/O Communications Port
The RS-232 interface is totally isolated from the interface board through the use 
of high-speed optical isolators and isolated 5-volt power supply.
See Chapter 2,“System Interfaces” for serial connections, pinouts, cables and 
supported modems.
Parallel I/O Communications Port
The parallel communications port is used to connect the monitor to the 
Recorder or to a standard PCL Level 3 printer. At the time of printing, not all 
PCL Level 3 printers are supported. For printers that have been validated for use