Product Manual
Table Of Contents
ii WELCH ALLYN UNIVERSAL DESK CHARGER
SERVICE MANUAL 711380 REV. D
Contents PAGE
Section 1: General Information
1.1 About the Universal Desk Charger ............................................................................... 1
1.2 Block Diagram ............................................................................................................. 1
1.3 Hardware Electrical Specifications ............................................ ...................................... 2
1.4 Help Information............................................................................................................ 3
1.5 Product Number Structure ............................................................................................. 3
1.6 Safety Warnings ........................................................................................................... 4
1.7 Approvals .................................................................................................................... 4
Section 2: Service
2.1 Incoming Inspection/Checklist ..................................................................................... 5
2.2 Required Tools............................................................................................................. 5
2.3 Incoming Operational Test ........................................................................................... 5
Section 3: Troubleshooting
3.1 Functional Tests/ Initial Diagnostic Steps ..................................................................... 6
Section 4: Repair and Disassembly
4.1.1 Base Housing Removal/Installation ............................................................................ 7
4.1.2 Printed Circuit Board Replacement............................................................................ 7
4.1.3 Fuse Replacement .................................................................................................... 8
Appendix A: Theory of Operation..............................................................................................9
Appendix B: Assembly Drawing..............................................................................................13
Appendix C: Electrical Schematic..........................................................................................14