Philips HEARTSTART XLT Service Manual page 61

Table 3-1 Unit Unresponsive
Test
1. Connect Power Module to
power source ONLY (AC
Mains or DC) and
observe indicators on
Power Module
(see Figure 3-3 on page
3-30).
2. Connect Power Module to
unit.
3. Attempt to power up unit.
M3500B/M5500B Service Manual
Unit Unresponsive
Isolate the fault by following the steps in Table 3-1. Before replacing any
parts, check to see if the cables and flex circuits are properly connected. See
"Servicing Notes" on page 4-1.
Result
"Power' indicator turns Power Source volt-
RED. age low.
Failure in Power
Module.
'Power' indicator turns
GREEN.
"Power' indicator turns Short in unit's 12 volt
RED. wiring.
Short on Power PCA.
Short on Control
PCA.
'Power' indicator stays
GREEN.
"Power' indicator turns Failure on Power
RED. PCA.
Failure on Control
PCA.
'Power' indicator stays
GREEN.
Possible Causes Corrective Actions
Check/correct source volt-
age.
Replace Power Module.
Proceed to step 2.
1. Check/replace Battery
PCA
2. Check/replace wiring to
Power PCA
Replace Power PCA.
Replace Control PCA.
Proceed to step 3.
Replace Power PCA.
Replace Control PCA.
Proceed to step 4.
Unit Unresponsive
3
3-9