Philips Heartstart XLT, Service Manual

Page: 62 / 224

Unit Unresponsive
3 - 10 Troubleshooting
4. Observe unit’s response. Unit powers up to some
working state. Main fuse open. 1. Replace Main Fuse
2. Replace Power PCA and
Main Fuse.
Open in battery wir-
ing. 1. Check/replace Battery
PCA
2. Check/replace wiring to
Power PCA
Unit still unresponsive. Short or other failure
somewhere in unit. Disconnect printer and dis-
play from Control PCA at
Control PCA. Then pro-
ceed to step 5.
5. Attempt to power up unit. Unit powers up to some
working state. Short in printer or dis-
play. Isolate the fault by recon-
necting one at a time and
powering up again. Then
replace the display or printer
as needed.
Unit still unresponsive. Short or other failure
somewhere in unit. 1. Replace Control PCA.
2. Replace Power PCA.
3. Replace Interface PCA.
If all above unsuccessful,
return unit for bench repair.
Table 3-1 Unit Unresponsive (Continued)
Test Result Possible Causes Corrective Actions