Vectronics VEC-221K - Manual (Page 18)

VEC-221K Instruction Manual CW Memory Keyer Kit
13
! ! 28. The nylon tie wrap should be used to firmly attach the battery clip
wires to the support hole on the PC board. Use the hole located
closest to the edge of the PC board. Pull the tie snug and trim excess.
black
+ 9V
GND
red
SW1 SW2
Nylon tie-wrap
Important Note: U1, U2 and U3 have good immunity to static discharge.
However, if you are working in a carpeted area, it's always a good idea to touch
a metal ground before handling semiconductors.
! ! 29. Locate the PIC16C72. Align its key (see below) with the socket key
for U1. Be sure that all 28 pins are freely entering the socket holes,
and apply firm pressure to fully seat the IC.
! ! 30. Locate the 24C04 EEPROM. Align its key (see below) with the
socket key for U2. Be sure that all 8 pins are freely entering the socket
holes, and apply firm pressure to fully seat the IC.
! ! 31. Locate the LM386 audio amplifier. Align its key (see below) with the
socket key for U3. Be sure that all 8 pins are freely entering the socket
holes, and apply firm pressure to fully seat the IC.
1 2 3 4
8 7 6
Installation
Key
Key
Installation
Pin Numbers