Texas Instruments Extensa 660 Series Maintenance Manual page 87

10
Plug-In AC Adapter
DC_IN=19V
Yes
U4=5V
Yes
Charge Battery 1 or
Charge Battery 2
Yes
END
Figure 5-11 Battery Charger Interface Troubleshooting Diagram
System Fails to Boot:
Battery Charger Interface Checks
No Check F1, T3
Check D18
No
Check Charger Control
Board (RBC3) U1, D8,
No
D7
Check Battery Pack
Voltage & Temp
Troubleshooting Procedures 5-27