Vectronics VEC-1500K User Manual

Page 57

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52

Based on the work to be done, select a soldering iron with the proper tip and
operating temperature, and also the correct solder to make the connection.

Carefully solder both leads of resistor R1 to the PC board.

Once the soldering operation is completed, carefully examine your work. Is the
connection bright and shiny? Has the solder flowed over the resistor lead and
the PC board surface (wetting) properly? Has solder splashed onto adjacent runs
(if so, it must be removed)

?

If the joint is poorly soldered, or is grainy in appearance, reheat the work and use
solder braid or a solder sucker to remove the solder. Try resoldering the
connections again. If the connections are still poor, review your material dealing
with soldering techniques.

When you are satisfied with the soldered connections for the leads

of R1, use a pair of fine cutting pliers to trim the remaining lead
lengths even with the solder connection.

Locate the 75K-ohm (75,000 ohm) resistor (violet-green-orange).

Install at location R2 on the PC board. Following the steps used for
R1, solder and trim the leads for resistor R2.

Locate the ten 10K-ohm resistors (brown-black-orange). These resistors will be
installed at locations R4 through R13 on the PC board. Carefully review each
solder connection as it is made. Do not proceed with soldering until the previous
solder connection is properly made, and any mistakes are corrected. Trim excess
lead lengths after completing each soldering operation.

Install a 10K-ohm resistor (brown-black-orange) at location R4.

Solder.

Install a 10K-ohm resistor (brown-black-orange) at location R5.

Solder.

Install a 10K-ohm resistor (brown-black-orange) at location R6.

Solder.

Install a 10K-ohm resistor (brown-black-orange) at location R7.

Solder.

Install a 10K-ohm resistor (brown-black-orange) at location R8.

Solder.

Install a 10K-ohm resistor (brown-black-orange) at location R9.

Solder.

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