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Note that in the NR version, the follow steps are NOT DONE (in this shaded box)
Install U7, the motor driver for the balance and volume pots. As in previous IC
installation steps:
Get the IC in the right way by matching silk screen and IC orientation marks
Bend two corner pins to retain the IC until you solder it in place. Choose places to
bend the pins that avoid shorting traces together.
Designation Value
Description
Done
U7
SN754410
Not Installed in the NR version
Install Q1, matching its shape to the silk-screen outline.
Q1
2N3904
NPN
3
transistor, TO-92 case
Install the Control Cable Connector
Looks at this drawing CAREFULLY to be sure that you’re putting P5 in correctly! These
three things show the odd-numbered side of the connector:
1.
Centrally located notch in the long side
2.
notches in the short sides are closer to the odd-numbered side of the connector
3.
AMP is visible at the bottom of the centrally located notch
Study this drawing and the connector until it’s clear which side is the odd pin side of the
connector, then match it to the odd pin silk screen on the PCB. Solder two corner pins
and make sure that you’re right one more time before you solder the rest of the pins.
Figure 37-Identify pin 1 for proper connector installation
Designation Value
Description
Done
P5
10 pin
5 x 2
Install the Motor Pots (Skip for NR version)
Prepare a long and a short piece of 26 AWG solid wire according to Figure 38.
Figure 38-Motor POT wire preparation
3
Early versions of the kit used MPSA06 transistors.
