Free Project - 245 LED Display

[Luciano]

Hi Magu,

I got your private message.

We will test the board based on these schematics and pictures:

Display Schematic.pdf (Post #1 of this thread).
Controller Schematic.pdf (Post #1 of this thread).
Your picture lm.jpg

In this post we will test the 245 LEDs and all the transistors.

Before we test the LEDs:

Remove all the ICs from their sockets with the exception of the 
5V regulator 7805 which must remain soldered on the PCB.
(Put the ICs into antistatic bags).

Replace the seven 18 ohm resistors with seven 180 ohm resistors.
(See Display Schematic.pdf). This step is mandatory!!!!!!!!!

Solder two insulated wires (about 50 cm each) to +5V and at the
other end of the wire solder a 1k (1000 ohm) resistor.

+5v-----------------------------/\/\/\-- (P1)  
    (50 cm insulated wire)    1k resistor.


+5v-----------------------------/\/\/\-- (P2)
    (50 cm insulated wire)    1k resistor.

The end of the first resistor will be called "P1" in the
instructions I will post in this thread. So put a label
on that resistor and write on it "P1". Do the same for the
second wire and write "P2" on the label.

TEST 1

T1/Step 1:

Apply 12V DC to the input of the voltage regulator and measure 
the voltage on its output which should be between 4.9 and 5.1V.

TEST 2

T2/Step 1:

All the ICs must be removed from the sockets, with the exception of
the 5V voltage regulator. The seven 18 ohm resistors must be replaced 
with 180 ohm resistors.

In TEST 2 will will test all the LEDs driven by ROW1.

Connect P1 to the socket IC1/PIN1 (ROW1).

T2/Step  2: Connect P2 to the socket IC7/PIN7 (COL35),verify the LED.
T2/Step  3: Connect P2 to the socket IC7/PIN4 (COL34),verify the LED.
T2/Step  4: Connect P2 to the socket IC7/PIN2 (COL33),verify the LED.

T2/Step  5: Connect P2 to the socket IC6/PIN9 (COL32),verify the LED.
T2/Step  6: Connect P2 to the socket IC6/PIN6 (COL31),verify the LED.
T2/Step  7: Connect P2 to the socket IC6/PIN5 (COL30),verify the LED.
T2/Step  8: Connect P2 to the socket IC6/PIN1 (COL29),verify the LED.
T2/Step  9: Connect P2 to the socket IC6/PIN10 (COL28),verify the LED.
T2/Step 10: Connect P2 to the socket IC6/PIN7 (COL27),verify the LED.
T2/Step 11: Connect P2 to the socket IC6/PIN4 (COL26),verify the LED.
T2/Step 12: Connect P2 to the socket IC6/PIN2 (COL25),verify the LED.

T2/Step 13: Connect P2 to the socket IC5/PIN9 (COL24),verify the LED.
T2/Step 14: Connect P2 to the socket IC5/PIN6 (COL23),verify the LED.
T2/Step 15: Connect P2 to the socket IC5/PIN5 (COL22),verify the LED.
T2/Step 16: Connect P2 to the socket IC5/PIN1 (COL21),verify the LED.
T2/Step 17: Connect P2 to the socket IC5/PIN10 (COL20),verify the LED.
T2/Step 18: Connect P2 to the socket IC5/PIN7 (COL19),verify the LED.
T2/Step 19: Connect P2 to the socket IC5/PIN4 (COL18),verify the LED.
T2/Step 20: Connect P2 to the socket IC5/PIN2 (COL17),verify the LED.

T2/Step 21: Connect P2 to the socket IC4/PIN9 (COL16),verify the LED.
T2/Step 22: Connect P2 to the socket IC4/PIN6 (COL15),verify the LED.
T2/Step 23: Connect P2 to the socket IC4/PIN5 (COL14),verify the LED.
T2/Step 24: Connect P2 to the socket IC4/PIN1 (COL13),verify the LED.
T2/Step 25: Connect P2 to the socket IC4/PIN10 (COL12),verify the LED.
T2/Step 26: Connect P2 to the socket IC4/PIN7 (COL11),verify the LED.
T2/Step 27: Connect P2 to the socket IC4/PIN4 (COL10),verify the LED.
T2/Step 28: Connect P2 to the socket IC4/PIN2 (COL9),verify the LED.

T2/Step 29: Connect P2 to the socket IC3/PIN9 (COL8),verify the LED.
T2/Step 30: Connect P2 to the socket IC3/PIN6 (COL7),verify the LED.
T2/Step 31: Connect P2 to the socket IC3/PIN5 (COL6),verify the LED.
T2/Step 32: Connect P2 to the socket IC3/PIN1 (COL5),verify the LED.
T2/Step 33: Connect P2 to the socket IC3/PIN10 (COL4),verify the LED.
T2/Step 34: Connect P2 to the socket IC3/PIN7 (COL3),verify the LED.
T2/Step 35: Connect P2 to the socket IC3/PIN4 (COL2),verify the LED.
T2/Step 36: Connect P2 to the socket IC3/PIN2 (COL1),verify the LED.

TEST 3

T3/Step 1:

All the ICs must be removed from the sockets, with the exception of
the 5V voltage regulator. The seven 18 ohm resistors must be replaced 
with 180 ohm resistors.

In TEST 3 will will test all the LEDs driven by ROW2.

Connect P1 to the socket IC1/PIN2 (ROW2).

T3/Step  2: Connect P2 to the socket IC7/PIN7 (COL35),verify the LED.
T3/Step  3: Connect P2 to the socket IC7/PIN4 (COL34),verify the LED.
T3/Step  4: Connect P2 to the socket IC7/PIN2 (COL33),verify the LED.

T3/Step  5: Connect P2 to the socket IC6/PIN9 (COL32),verify the LED.
T3/Step  6: Connect P2 to the socket IC6/PIN6 (COL31),verify the LED.
T3/Step  7: Connect P2 to the socket IC6/PIN5 (COL30),verify the LED.
T3/Step  8: Connect P2 to the socket IC6/PIN1 (COL29),verify the LED.
T3/Step  9: Connect P2 to the socket IC6/PIN10 (COL28),verify the LED.
T3/Step 10: Connect P2 to the socket IC6/PIN7 (COL27),verify the LED.
T3/Step 11: Connect P2 to the socket IC6/PIN4 (COL26),verify the LED.
T3/Step 12: Connect P2 to the socket IC6/PIN2 (COL25),verify the LED.

T3/Step 13: Connect P2 to the socket IC5/PIN9 (COL24),verify the LED.
T3/Step 14: Connect P2 to the socket IC5/PIN6 (COL23),verify the LED.
T3/Step 15: Connect P2 to the socket IC5/PIN5 (COL22),verify the LED.
T3/Step 16: Connect P2 to the socket IC5/PIN1 (COL21),verify the LED.
T3/Step 17: Connect P2 to the socket IC5/PIN10 (COL20),verify the LED.
T3/Step 18: Connect P2 to the socket IC5/PIN7 (COL19),verify the LED.
T3/Step 19: Connect P2 to the socket IC5/PIN4 (COL18),verify the LED.
T3/Step 20: Connect P2 to the socket IC5/PIN2 (COL17),verify the LED.

T3/Step 21: Connect P2 to the socket IC4/PIN9 (COL16),verify the LED.
T3/Step 22: Connect P2 to the socket IC4/PIN6 (COL15),verify the LED.
T3/Step 23: Connect P2 to the socket IC4/PIN5 (COL14),verify the LED.
T3/Step 24: Connect P2 to the socket IC4/PIN1 (COL13),verify the LED.
T3/Step 25: Connect P2 to the socket IC4/PIN10 (COL12),verify the LED.
T3/Step 26: Connect P2 to the socket IC4/PIN7 (COL11),verify the LED.
T3/Step 27: Connect P2 to the socket IC4/PIN4 (COL10),verify the LED.
T3/Step 28: Connect P2 to the socket IC4/PIN2 (COL9),verify the LED.

T3/Step 29: Connect P2 to the socket IC3/PIN9 (COL8),verify the LED.
T3/Step 30: Connect P2 to the socket IC3/PIN6 (COL7),verify the LED.
T3/Step 31: Connect P2 to the socket IC3/PIN5 (COL6),verify the LED.
T3/Step 32: Connect P2 to the socket IC3/PIN1 (COL5),verify the LED.
T3/Step 33: Connect P2 to the socket IC3/PIN10 (COL4),verify the LED.
T3/Step 34: Connect P2 to the socket IC3/PIN7 (COL3),verify the LED.
T3/Step 35: Connect P2 to the socket IC3/PIN4 (COL2),verify the LED.
T3/Step 36: Connect P2 to the socket IC3/PIN2 (COL1),verify the LED.

The text was too large for one post. See next two posts for the rest of
the LEDs test.