Friden 1152 Circuit Board #4
Board #4 contains 30 integrated circuits. Eight of the ICs are from the 7400-series of TTL logic, while the rest of the devices are DTL. The chips used are made by Texas Instruments, National Semiconductor, and Motorola. Along with the ICs, there are three transistors, 36 diodes, thirteen resistors and eight capacitors.
The bare circuit board has Part # 7018023 Revision 1. The completed assembly has Part # 7018024.