Users Manual Model 656/636 Appendix B • 61
Appendix B
Software Upgrade Chip Placement Positions
Thermal Control Board P/N 351105
(Use chip removal tool p/n. 351156 for square I.C.'s)
THERMAL CONTROL BOARD, Upgradeable software I.C.'s include U16 and U53.
Align angled corners of chip with socket and arrow denotes pin #1 or dimple on chip.