Texas Instruments TI-92+, Tip List

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Components are shown in black, jumper wires in red, and off-board connections are blue. Note that the
PCB is not vertically symmetrical; the two rows of single pads are near the top. This layout shows the
component side of the board. All components are mounted on this side, but it will be easier to mount
some of the jumpers on the reverse side (called the solder side). The two long jumper wires at the top
and bottom of the PCB are bare wire, and need only be soldered at the pads where other jumpers or
parts are connected. You must use 1/8W resistors for this layout, because 1/4W resistors are probably
too big. Note that the collector leads for Q6 and Q7 are separated from the other leads. Also note that
the two center traces are connected with a short jumper, so that both are connected to the base and
TX. The general assembly procedure is:
1. Lightly polish the copper pads with very fine steel wool or sandpaper, or ScotchBrite. This
removes the oxidation and results in better, faster solder joints.
2. Install all jumpers except the Q6 and Q7 collector jumpers. On the component side, install the
emitter jumpers for Q3 and Q4, and the base jumpers for Q5 and Q8. Install the remaining
jumpers on the solder side of the PCB.
3. Install the diodes.
4. Install Q1, Q2, Q3 and Q4. Pay close attention to the emitter/base/collector lead order, and
mount the transistors as close as possible to the PCB, so that they will clear the enclosure
sides.
5. Install the resistors.
6. Install Q5, Q6, Q7 and Q8.
7. Install the collector jumpers for Q6 and Q7, on the component side of the PCB.
8. Install the wires for the the off-board connections for the 3/32" jack and the DB9 connector.
9. Assemble the components into the enclosure.
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