DIGITAL CLOCK MODEL CLK100
GEKCO INC.
Rev 1.1
13
Position the Display Circuit Board with the component side facing up as shown below
C1
R1
C2
Figure 4: Display Board Top Side Assembly Pictorial
Install the decoupling capacitor.
( )
C1: 0.1 uF (104) radial-lead ceramic capacitor
( )
R1: 10 k
Ω
(brn-blk-org-silver) resistor
NOTE: Before you install an electrolytic capacitor, look at it and identify the leads. One lead will have
either a negative (
−
) mark or a positive (
+
) mark near it on the side of the capacitor. The aluminum
electrolytic capacitor has the marking for a negative lead which may look like an oblong bar, sometimes
with a circle around it, inside an arrow. Be sure to install the positive lead in the positive-marked hole.
( )
C2: 10 uF radial-lead electrolytic aluminum capacitor (lay down the capacitor against the board
so it does not interfere with the enclosure)
C2 SIDE VIEW
( )
Solder the leads to the foil and cut off the excess lead lengths.
In the next step, make sure the LED display modules are oriented correctly. Match the decimal point on
the display with the orientation shown on the PCB silkscreen. Solder the corner pins first and make
