DIGITAL CLOCK MODEL CLK056
GEKCO INC.
Rev 1.0
17
( ) U1: MAX7219 IC
Install the IC on the main circuit board:
( ) U1: ATMEGA328P IC
This completes the assembly.
7.
Final Tests
Using a multi-meter to measure resistance
perform the following checks.
( )
Verify that the resistance with the
positive lead on U5 pin 20 and negative lead on
pin 10, is greater than 2k ohms.
( )
Connect the plug in transformer T1 to
power connector PS1 and plug into a wall
outlet and verify that the voltage with the
positive lead on U5 pin 20 and negative lead on
pin 10, is 5V.
8.
In Case Of Difficulty
Th
e “Visual Checks” that are provided below
will help you locate any difficulties that might
occur during the assembly and testing of your
Digital Clock.
Additional “ In Case of Difficulty”
information is also provided in your Operation
Manual.
In an extreme case where you are unable to
resolve a difficulty, refer to the “Customer
Service” information at the back of the Manual.
VISUAL CHECKS
1. The majority of kits that fail are due to poor
solder connections. Therefore, you can
eliminate many difficulties by carefully
inspecting each connection to make sure it
is soldered as described in the solder
instructions section. Reheat any doubtful
connections.
2. Check the circuit board to be sure there
are no solder bridges between adjacent
connections.
3. Check capacitor values carefully. Be sure
the proper value part is installed at each
capacitor location and that the negative
(
) mark or a positive (
) mark is
oriented correctly.
4. Check each resistor value carefully.
5. Be sure the correct diode is installed at
each location, and that the banded end is
positioned correctly.
6.
Check the orientation and the correct part
number of the Integrated Circuits. Use the
pictorial diagrams as a reference.
9.
Final PCA Assembly
( )
Locate the RTC module and install on
the
clock
main
board
as
shown.
Figure 12 RTC Module Assembly
10.
Final Assembly
Skip these steps if the enclosure is not used.
( )
Unpack the 6 piece enclosure which
includes a transparent red front piece, and
clear back, top, bottom and side panels.
( )
Remove the paper backing on all the
enclosure pieces.
