Philips Heartstart XLT, Service Manual

Page: 75 / 224

M3500B/M5500B Service Manual 3 - 23
Operational Problems
3
Won’t discharge.
•
Control PCA failure.
•
Interface PCA failure.
•
SHOCK
key failure.
Diagnose as follows:
1. In Diagnostic Mode, run Controls
Test and test
SHOCK
key.
•
Key tests OK: Replace Control
PCA.
•
Key not OK: Replace 1) Inter-
face PCA 2) Top Case Assem-
bly 3) Control PCA.
Charges, but disarms when press
Shock
.
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.
Replace pads, pads cable.
Power PCA failure. Replace Power PCA
Control PCA failure. Replace Control PCA
Charges, but disarms spontane-
ously.
1. Unit sensed
Pads Off
or
Cable
Off
due to:
•
Pads losing contact with patient.
•
Pads failure.
•
Pads cable failure.
•
Power PCA failure.
•
Control PCA failure.
•
Interface PCA failure.
2.
DISARM
key failure (intermittent)
Replace pads, pads cable.
Diagnose further as follows:
In Diagnostic Mode, run Controls
Test and test
DISARM
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.
Charges slowly - about 4-5 sec.
instead of 2-3 sec. Battery too old or not fully charged. Replace with new, fully charged bat-
tery. Also run Battery Capacity Test
on suspect battery (see page 2-31).
Unit senses unsupported battery
due to:
•
Unsupported battery in use
•
Battery PCA failure.
•
Power PCA failure.
•
Control PCA failure.
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.
Table 3-9 Operational Problems - Defibrillation and Synchronized Cardioversion (Continued)
Message or Symptom Possible Causes Suggested solution