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Table 3-9 Operational Problems - Defibrillation and Synchronized Cardioversion (Continued)
Message or Symptom
Won't discharge.
Charges, but disarms when press
Shock
.
Charges, but disarms spontane-
ously.
Charges slowly - about 4-5 sec.
instead of 2-3 sec.
M3500B/M5500B Service Manual
Possible Causes
• Control PCA failure.
• Interface PCA failure.
SHOCK
key failure.
•
Patient impedance sensed as too
high or too low during energy deliv-
ery due to:
• Pads losing contact with patient.
• Pads failure.
• Pads cable failure.
Power PCA failure.
Control PCA failure.
Pads Off
Cable
1. Unit sensed
or
Off
due to:
• Pads losing contact with patient.
• Pads failure.
• Pads cable failure.
• Power PCA failure.
• Control PCA failure.
• Interface PCA failure.
DISARM
2.
key failure (intermittent)
Battery too old or not fully charged.
Unit senses unsupported battery
due to:
• Unsupported battery in use
• Battery PCA failure.
• Power PCA failure.
• Control PCA failure.
Operational Problems
Suggested solution
Diagnose as follows:
1. In Diagnostic Mode, run Controls
SHOCK
Test and test
key.
• Key tests OK: Replace Control
PCA.
• Key not OK: Replace 1) Inter-
face PCA 2) Top Case Assem-
bly 3) Control PCA.
Replace pads, pads cable.
Replace Power PCA
Replace Control PCA
Replace pads, pads cable.
Diagnose further as follows:
In Diagnostic Mode, run Controls
DISARM
Test and test
key.
• Key tests OK: Replace 1) Power
PCA 2) Control PCA.
• Key not OK: Replace 1) Inter-
face PCA 2) Top Case
Assembly3) Control PCA.
Replace with new, fully charged bat-
tery. Also run Battery Capacity Test
on suspect battery (see page 2-31).
Use only supported battery
(M3516A/M5516A).
Diagnose further as follows:
In Diagnostic Mode, start Battery
Capacity Test (see page 2-31).
Unsupported battery
• "
" on dis-
play: Stop test. Replace 1)
Battery PCA 2) Power PCA 3)
Control PCA.
• No message on display: Stop
test. Replace 1) Power PCA 2)
Control PCA.
3
3-23
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