Philips Trim 1 Service Manual

							TroubleshootingRestarting the Cardiograph
PageWriter Trim Cardiograph Service Manual5-33
– If multiple static WEP keys are being used, the transmit key must be configured as the 
first WEP key. On the access point, the first WEP key must match the first key on the 
wireless adapter.
– If LEAP authentication is used, ensure that the LEAP credentials are enabled. For 
more information, See Enabling LEAP Credentials on page C-10.
For further information see the Cisco Aironet Wireless LAN Client Adapters Installation 
and Configuration Guide for Windows CE available for download from: 
www.cisco.com.
Restarting the Cardiograph
To restart the cardiograph:
1
Press the On/Standby button for 2-3 seconds to shut down the cardiograph. 
2Press the On/Standby button again to power on the cardiograph.
3If steps 1 and 2 do not work, press the restart button (rear of cardiograph). See Figure 5-1 
and Figure 5-2. 
After approximately 20 seconds, the PageWriter Trim II/III/Rx software identification 
screen appears, followed by an audible beep. For the PageWriter Trim I, the screen with 
five triangles appears.
Figure 5-1 Rebooting the Cardiograph (Trim II/III/Rx)
Figure 5-2 Rebooting the Cardiograph (Trim I)
Restart button 
(Gentle pressure only)
Restart button 
(Gentle pressure only) 
						

							TroubleshootingRestarting the Cardiograph
5-34PageWriter Trim Cardiograph Service Manual 
						

							6
6-1
Chapter 6Performance Verification and
Safety Tests
This chapter describes the tests and inspections required to verify performance of the 
PageWriter Trim cardiograph following a service event.
Required Testing Levels
The Performance Verification Tests verify proper operation of the PageWriter Trim 
cardiograph following a service event. The level of testing required corresponds to the type of 
service performed. 
NOTEInstallation and preventive maintenance are not considered service events since the cardiograph is 
designed to be installed and maintained by the user. Service events are divided into two categories: 
repairs and upgrades. Repairs are then further divided into external repairs and internal repairs.
External Repairs
External repairs consist of the repair or replacement of one or more items when the repair or 
replacement does not require you to open the cardiograph case. Therefore, only a limited 
number of tests are necessary to verify performance after a repair. External repairs that 
involve the PIM and PIM lead set require an ECG simulation test to verify proper ECG signal 
path.
Typical external repairs include:
„PIM
„Patient leads
„Labels
„Battery
„Paper tray
„AC power cord
„Fuses
„PCMCIA card (For Trim II/III/Rx only)
„PCMCIA network LAN card (For Trim II/III/Rx only) 
						

							Performance Verification and Safety TestsInternal Repairs
6-2PageWriter Trim Cardiograph Service Manual
„Barcode reader (For Trim II/III/Rx only)
„Smart Card reader (For Trim II/III/Rx only)
„Magnetic card reader (For Trim II/III/Rx only)
„Modem card (For Trim II/III/Rx only)
„USB memory stick (For Trim II/III/Rx only)
„Shielded LAN cable
„Cart 
„External cables
Refer to Table 6-1 for the required test blocks that must be performed after any external repair 
occurs.
Internal Repairs
If the case was opened, regardless of the repair, you must perform additional Performance 
Verification Tests. Refer to Table 6-1 for the required test blocks that must be performed after 
any internal repair.
Upgrades
Most PageWriter Trim upgrades are installed by the user and are not considered service 
events. The only exceptions are upgrades for the software and for the Magnetic Card Reader. 
Refer to Table 6-1 for the required test blocks that must performed after these upgrades.
Table 6-1 Tests Required 
Service Event Test Blocks Required
Repairs External repairs not involving the 
patient module, such as battery, 
fuses, labels, cart, etc.Perform Visual Inspection, Power 
On test, and functional tests 
specific to the components 
repaired.
External repairs where the 
cardiograph case or PIM are not 
opened, but involving the patient 
module or patient lead set.Perform Visual Inspection, Power 
On test, ECG simulation test, and 
functional tests specific to the 
components repaired.
Repairs Internal repairs where the 
cardiograph case is opened.Perform Visual Inspection, Power 
On test, ECG simulation test, 
safety tests S1, S2, or S3, plus 
functional tests specific to the 
components repaired. 
						

							Performance Verification and Safety TestsTest and Inspection Matrix
PageWriter Trim Cardiograph Service Manual6-3
Test and Inspection Matrix
The following Test and Inspection Matrix describes the various test blocks, expected test 
results, and what you need to document on the service record.  PIM Repair Internal repairs where the PIM 
case is opened.Perform Visual Inspection, Power 
On test, ECG simulation test, and 
safety test S3. 
Upgrades Software upgrades (via external 
PCMCIA slot)Perform Power On test.
Hardware upgrades  Perform Power On test, and 
functional tests specific to the 
components repaired.
Table 6-1 Tests Required (continued)
Service Event Test Blocks Required
Test Block Name  Test or Inspection to PerformExpected (Passing) 
Test ResultsWhat to Record 
on a Service 
Record
Visual Inspection (V) Perform visual inspection. If there is no apparent 
wear, damage, or 
corrosion, the visual 
inspection passes. V:P (pass)
V:F (fail)
Power On (PO) Power on the unit. Watch display for 
error codes. See “Troubleshooting” 
on page 5-1 for a list of codes.If the display shows 
the PageWriter Trim 
software 
identification screen 
followed by the R/T 
ECG screen, the 
Power On test passes.PO:P (pass)
PO:F (fail)
ECG Simulation 
(ECG)Connect a 12-lead patient simulator 
to the lead set and print a 12-lead 
ECG. Visually analyze the printout. 
See page 6-6.If there is trace 
activity in all 12 leads 
with no notable 
distortion or noise, 
and cal pulses of 
proper duration and 
amplitude, then the 
ECG Simulation 
passes.ECG:P (pass)
ECG:F (fail) 
						

							Performance Verification and Safety TestsTest Equipment
6-4PageWriter Trim Cardiograph Service Manual
Test Equipment
The following test equipment is required to perform the complete set of Performance 
Verification tests:
„ECG Simulator
„Electrical Safety Tester
„Software Support Kit (CF Card with PCMCIA Adapter). Order part number 
453563479701 through your Philips authorized service parts supplier. 
Performance Verification Tests
Visual Inspection (V)
1Before beginning the inspection, press the On/Standby button to put the cardiograph in Off 
mode, and unplug the power cord from the wall outlet. 
2Inspect the cardiograph external surfaces for the following:
– Worn or damaged power cord
– Loose or missing hardware Safety (S1)
„Earth leakage current NC 
(normal condition)
„Earth leakage current SF 
(Single Fault)
See page 6-7.NC Maximum 
leakage current
< 300 uA (UL)
<
 500 uA (IEC) x1
SF Maximum leakage 
current
<
 1000 uA  x2Example: 
S1:P/100/200
Safety (S2) Protective earth resistance
See page 6-7.Maximum impedance 
<
 200 milli
Ωx1Example: 
S2:P/100
Safety (S3) Leads leakage current 
„Source (Normal condition) 
„Source (Single Fault condition)
„With Mains on applied part 
(Single Fault Condition)
See page 6-7.<
    10 uA       x1 
<
    50 uA       x2 
<
    50 uA       x3Example: 
S3:P/5/20/20
Test Block Name  Test or Inspection to PerformExpected (Passing) 
Test ResultsWhat to Record 
on a Service 
Record 
						

							Performance Verification and Safety TestsPerformance Verification Tests
PageWriter Trim Cardiograph Service Manual6-5
– Mechanical damage
– Evidence of liquid spill
– Worn printer drive gear
– Worn printer roller
– Corroded or damaged reusable electrodes, if present
– Damaged patient leads
– Dirt/paper residue on the thermal print head
– Frayed or damaged wiring
– Visible LCD display damage
3Replace any damaged or missing items. 
4Clean the patient leads as necessary. See “Cleaning the PIM, Patient Data Cable, and Lead 
Wires” on page 3-2 for cleaning instructions.
Power On Test
To process a completed Power On test, you must restart the cardiograph.
To restart the cardiograph:
1
Press the On/Standby button for 2-3 seconds to shut down the cardiograph. 
2Press the On/Standby button again to power on the cardiograph.
3If steps 1 and 2 do not work, press the Reset button (rear of cardiograph). To perform a 
soft reset, gently press the Reset button located next to the serial port on the back of the 
cardiograph. See Figure 6-1 and Figure 6-2. 
After approximately 20 seconds, the PageWriter Trim II/III/Rx software identification 
screen appears, followed by an audible beep. For the PageWriter Trim I, the screen with 
five triangles appears.
Figure 6-1 Rebooting the Cardiograph (Trim II/III/Rx)
Reset button 
(Gentle pressure only) 
						

							Performance Verification and Safety TestsPerformance Verification Tests
6-6PageWriter Trim Cardiograph Service Manual
Figure 6-2 Rebooting the Cardiograph (Trim I)
The following self-tests are automatically performed during reboot:
„RAM
„Software CRC Test
„Flash Memory: onboard CompactFlash (CF) 
„PIM Status
„Battery Voltage Test
„Printer Status
ECG Simulation (ECG)
Taking an ECG using a 12-lead ECG simulator allows you to verify areas of operation that the 
extended self-test cannot check:
„Integrity of the patient leads
„Accuracy of the paper speed (not available on all simulators)
„Accuracy of the gain settings (not available on all simulators)
Trace differences may result from difference in simulators, simulators settings, and from 
differences in configuration and control settings on the cardiograph. 
To perform the ECG Simulation Test:
1
Connect the PIM lead wires to the simulator.
2Verify that all lead wires are connected by observing the display for: 
– Flat lines or leads off information (for Trim II/III/Rx)
– Leads off indicator (for Trim I) 
3Firmly pull each lead wire tight, and then look for excessive noise on the display (may be 
indicated by yellow or orange waveforms). 
4Press the Auto button to start an Auto 12-Lead recording.
Depending on the cardiograph’s configuration, the ECG may be printed automatically at 
this point, or it may only be previewed on the display. 
Reset button 
(Gentle pressure only) 
						

							Performance Verification and Safety TestsPerformance Verification Tests
PageWriter Trim Cardiograph Service Manual6-7
5If the ECG does not automatically print, press the Enter key ( ) to start printing.
Verify the following when printing is complete:
– Trace activity for all 12 leads. Confirms integrity for all patient electrodes and 
leadwires. Noise should measure less than one (1) mm, with no baseline wander.
– No gross distortion of complexes or calibration pulses (no overshoot, for example).
– Duration for calibration pulses for correct paper speed. With cardiograph set to record 
at 25 mm/sec, the calibration pulse should measure 5mm (calibration pulse duration is 
200 ms).
– Calibration pulse amplitude is correct.
NOTES„An arrhythmia simulator is not an acceptable tool for verifying computerized ECG analysis. The 
analysis software is biased to process human ECG data.
„Noise may be an artifact of poor connections to the simulator or position of the cables. If noise 
appears, check the connectors or adjust the cable drape.
Safety Tests
This section explains tests of the cardiograph and PIM electrical safety.
„Use the procedures called out by the manufacturer of the safety analyzer in use.
„Test both Normal and Reverse polarity line connections for each test, and record the 
worst-case value.
„If a ground reference point is needed for the testing, use the metal grounding stud on the 
back of the cardiograph.
Safety Test S1 - Earth Leakage
To check for leaks in the ground wire for the AC power cord. 
„Normal Condition with both AC line connections intact:
–<
 300 μA (UL, 120 VAC)
–<
 500 μA (IEC, 240 VAC)
„Single Fault Condition with one AC line connection open: 
<
 1000 μ Α
Safety Test S2 - Protective Earth Resistance
Impedance of protective earth ground: 
<
 200 mΩ
Safety Test S3 - Leads Leakage Current
Leakage from Source or into Sink patient leads (Applied Parts). This test is also used for the 
Patient Interface Module (PIM).
„Source 
						

							Performance Verification and Safety TestsPerformance Verification Tests
6-8PageWriter Trim Cardiograph Service Manual
– Normal Condition with both AC line connections and earth ground intact:
<
 10 μA
– Single Fault Condition with separate open neutral and open earth, each in turn:
<
 50 μA
„Sink
Single Fault Condition with AC Mains voltage on Applied Parts (both AC line 
connections and earth ground intact).
<
50 μA