Vectronics VEC-221K - Manual (Page 16)

VEC-221K Instruction Manual CW Memory Keyer Kit
11
the PC board. Install and solder the sockets at the following locations.
Make sure key is orientated with board legend.
! ! U2 8-pin IC socket (observe key orientation)
! ! U3 8-pin IC socket (observe key orientation)
1 2 3 4
8 7 6 5
Installation
Key
Pin Numbers
Top view of socket
! ! 18. Install and solder the 28-pin IC socket at location U1. Make sure key
is orientated with board legend.
! ! 19. Locate the two 3.5 mm stereo jacks. Install and solder at the following
locations:
! ! J1 3.5 mm stereo jack
! ! J3 3.5 mm stereo jack
! ! 20. Find the RCA phono jack. Install and solder at location J2.
! ! 21. Locate the six push-button switches. The leads should be fully seated,
and the switch body level to the board. Install and solder at the
following locations:
! ! SW1 push-button switch
! ! SW2 push-button switch
! ! SW3 push-button switch
! ! SW4 push-button switch
! ! SW5 push-button switch
! ! SW6 push-button switch
! ! 22. Switches SW1, SW2, SW3, SW4 and SW6 must be changed from
latching to momentary operation. Follow these directions carefully to
avoid damaging these switches! Set switch so shaft is latched in the
fully extended position. Using a pair of long-nose pliers, carefully lift
the latching clip's end near the switch body (away from the shaft) out