MFJ Memory Keyer MFJ-493, Instruction Manual

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MFJ-493 Instruction Manual
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U1 IC, CPU, 40, 8-Bit, INTEL, P80C32-1
U2, U11 IC, HCT 20, Tri-State Octal Latch, 74HCT373
U3 IC, EPROM, 28 Pin, 256K, 21V, CMOS, 27C256
U4 Voltage Regulator, TO-220, +5 Volts, 7805T
U5 IC, RAM, 28 Pin, 32k × 8, 150 nS, 43256-15L
U7 IC, LS, 14, Quad 2-Input Nor Gate, 74LS02
U8 IC, HC, 8 BIT Shift Register, IN, 74HC165
U9 IC, HC, 16, Inverting Hex/Buffer/Conv,74HC4049
U10 IC CPU, 16 Pin 4 MHz, 68HC705K1
U6, U12 IC, HC, 8 BIT Shift Register, Out, 74HC164
FOR U1 Socket, IC, Low Profile, 40 Pin
FOR U2, U11 Socket, IC, Low Profile, 20 Pin
FOR U3, U5 Socket, IC, Low Profile, 28 Pin
FOR U8, U9, U10 Socket, IC, Low Profile, 16 Pin
FOR U6, U7, U12 Socket, IC, Low Profile, 14 Pin
P2 Jumper, Ribbon, 12 Pos., Singleline
J1 Jack, 1/4" Phone, PCB, Open, Stereo
J2, J5 Jack, RCA Phono, PCB, Single
J3 Jack, 2.1 mm, PCB, DC Coaxial Jack
J4 Connector, DIN, PCB, Rt. Ang, F, 5 Pin
J6 Connector, D-Sub, PCB Rt. Ang, 9 Pin F, DB-9S
J7 Connector, Header, Rt. Ang., .1, 10 Positions
SW1-SW7 Switch, Push Button, 125 VAC, SPST (N.O.) Mem
SW8 Switch, Push Button, PC, .5 A, 125 VAC, 2P2P
FOR SW8 Knob, Plastic, Push Button, .350" Dia, RED
B1 Battery, Coin, 3V, Lithium, (1480)
FOR B1 Holder, Battery, PCB MT, Coin, 3 V, Lithium
SP Speaker, 2", Round, .2 Watt, 8 Ohm
CR1 LED, 5 mm, Round, Red/Green
CR2,CR3,CR4 LED, 5 MM Round, Red, MV5753