4-3
EP757
SERVICE MANUAL
Introduction Fundamental Principle Mechanical Construction
Procedure of Disassembly
Function of Boards Specifications
Troubleshooting Function Test and Alignment Procedure Firmware Upgrading Procedure DDC Key-In Procedure Appendix
4-1 Disassemble Top Cover Module, Keypad Board and Speaker
1.
Remove three screws and one long screw from Bottom Housing.
2.
Remove four screws beside Top Housing.
3.
Lift up Top Housing and unplug three wires to Thermal Board, IR Cover Module and Speaker
Board.
Bottom Housing
Top Housing
IR Cover Module
Speaker Board
Keypad Board