Philips Trim 1 Service Manual

TroubleshootingPower On and Power Off Sequence
PageWriter Trim Cardiograph Service Manual5-3
Figure 5-15 Trim II/III/Rx Power On Sequence 

TroubleshootingPower On and Power Off Sequence
5-4PageWriter Trim Cardiograph Service Manual
Figure 5-16 Trim I Power Off Sequence
Figure 5-17 Trim II/III/Rx Power Off Sequence 

TroubleshootingPower On and Power Off Sequence
PageWriter Trim Cardiograph Service Manual5-5
Special Note About Software Version A.01.03 
Please note that the power up sequence for software version A.01.03 may differ from the 
process described in Figure 5-14 and in Figure 5-15. There are circumstances where the power 
up sequence can be delayed by up to a maximum of 50 seconds. This can occur with installed 
software version A.01.03 when the PIM is not connected to the cardiograph (or a defective 
PIM...

TroubleshootingTroubleshooting Cardiograph Issues
5-6PageWriter Trim Cardiograph Service Manual
Troubleshooting Cardiograph Issues
The troubleshooting information in this section will help you to localize a fault and to correct 
it. 
The following charts list symptoms and the steps to follow to investigate and solve the 
problem. Several failure mode symptoms may actually be hardware induced or triggered, and 
may require board replacement or opening of the cardiograph for inspection, please contact the...

TroubleshootingTroubleshooting Cardiograph Issues
PageWriter Trim Cardiograph Service Manual5-7
Screen is dark and 
shows no imageLCD panel failure Replace with a new LCD 
panel to see if it functions 
normally. Replace with a new LCD 
panel. Contact Philips 
Medical Systems (see 
page 1-32).
LCD backlight board 
failure. Replace with a new 
backlight board to see if 
the LCD functions 
normally.Replace the LCD 
backlight board. Contact 
Philips Medical Systems 
(see page 1-32).
Main controller board...

TroubleshootingTroubleshooting Cardiograph Issues
5-8PageWriter Trim Cardiograph Service Manual
Keyboard/Trim Knob/Dedicated Key Issues 
Table 5-2 Keyboard/Trim Knob/Dedicated Key Issues 
SymptomPossible Cause & 
Investigation StepConfirmation Solution
Keyboard is 
unresponsiveKeyboard controller 
subsystem has failed.
Action: restart cardiograph 
using rear button (see page 
5-33) and launch the 
Service Utility. Perform 
the Keyboard Test.Unable to enter Service 
mode after restart. 
Keyboard is still...

TroubleshootingTroubleshooting Cardiograph Issues
PageWriter Trim Cardiograph Service Manual5-9
Keyboard is typing 
incorrect characters Keyboard controller 
subsystem has failed. 
Action: restart cardiograph 
using rear button and 
launch Service Utility (see 
page 4-7). Run the 
Keyboard Test. Keyboard is now 
functional. Occasional recoverable 
keyboard failures have 
been observed. If 
failures persist, 
cardiograph must be 
serviced to inspect and 
possibly replace 
keyboard, cabling, or 
controller...

TroubleshootingTroubleshooting Cardiograph Issues
5-10PageWriter Trim Cardiograph Service Manual
Signal Acquisition Issues
Before attempting to troubleshoot a signal acquisition error as a mechanical issue, ensure that 
the following patient preparation and basic troubleshooting techniques have first been 
followed.
Always follow good skin and patient preparation techniques prior to taking an ECG. Proper 
skin preparation helps to ensure a good quality ECG. Skin is a poor conductor of electricity 
and...

TroubleshootingTroubleshooting Cardiograph Issues
PageWriter Trim Cardiograph Service Manual5-11
After ensuring that proper patient preparation techniques are being followed, and that fresh 
electrodes are being applied to the patient, review the following table for further assistance. 
 
Table 5-3 Signal Acquisition Issues 
SymptomPossible Cause & 
Investigation StepSolution
All leads show leads 
off (red dashed line) 
continuouslyPIM communications 
have been lost due to 
USB patient data cable...

TroubleshootingTroubleshooting Cardiograph Issues
5-12PageWriter Trim Cardiograph Service Manual
One or more leads 
show leads off (red 
dashed line) 
periodicallyImproper or incomplete 
patient and skin 
preparation techniquesEnsure that good patient preparation and skin 
preparation techniques have been followed as 
described on page 5-10.
Improperly attached 
electrodes or lead wires; 
expired disposable gel 
electrodesEnsure that the lead adapters are clean and have a tight 
fit. 
Ensure that the...