What should I do if the Basketball Game Machine breaks down? How to repair it? Let's take a look at the maintenance methods.

1. The power supply is divided into three parts: A. It mainly supplies power to the IO board and 12V power supply for the main board to output the IO board signal, B. It mainly supplies power to 5V of each working IC in the circuit, C. It mainly supplies power to 12V of key lights such as the power supply and discharge tube.

2、 The logic circuit is mainly composed of 78E52C and a piece of PLD. One piece of 6116 is used as RAM and memory setting memory, and one piece of 74HC00P is used as power supply selector of 6116. Whether the battery provides the power of data storage to 6116 when it is not turned on. 74hc573 is the address latch,

74hc245 is the data selector. Ic4511 is the decoder of coin number display board. Am-c35 has the same function as 8051, and it is also the work of a single-chip microcomputer controlling the whole main board. Am-pld mainly controls the normal work of IO board, including the display of digital board, motor control, etc.

Here, I would like to share with you that the common problem we usually encounter is the failure of the main board when other circuits are normal:

1. The running light is not on and there is an alarm sound, under the normal condition of IO board. Most of the 37P lines are not connected properly or the group of power supplies for the IO board have no 12V voltage. Due to the defects in the circuit board design, most of them are two 4700uf25v capacitors loose or the power module 2576_ Adj is damaged. All the running lights on can confirm that the power supply group of the main board to the IO board is normal.

2. If you throw the ball without scoring, it should be the top ic847 damaged and the pull-up block of 847 burned, or am-pld damaged. All those with labels must be programmed and burned. They can only be sent back to the manufacturer for repair.

3. Only the running light is on, the digital board has no display, and there is no alarm. It can be explained that the whole SCM system is not working. See if the power indicator of the main board is on.

If not, please check whether the 17555 beside the LED is normal or whether the power supply has 5V voltage. If it's normal, you can replace the good IC on other computers to know that it's broken.

4. After the game machine is started, the running light is on, the digital board has no display, the basket motor and the ball baffle motor have been rotating, there is an alarm sound, and the digital board with random code is mostly damaged by am-pld. There may also be damage to 74hc245 or 6295 leaning on the outside of the adjusting sound potentiometer. The first pin of 74hc245 that can be measured with a multimeter should have a good resistance to the ground of about 1.5 ~ 1.6K. If there is a deviation of about 100 Ω, it can be basically judged that 245 or 6295 near the potentiometer is damaged, because the second pin of 6295 is connected to the first pin of 245.

5. Can enter the game, can't count down or throw the ball without scoring. Most of 6116 are caused by internal data confusion. It is possible to unplug 6116 and plug it in again, or 6116 may be damaged, but this situation is rare.

6. Automatic bonus coin, most of the plug-in coin socket solder.

7. The sound is abnormal, there is noise or intermittent sound, most of which are the corresponding 6295 faulty welding of sound memory. The sound contents of the sound memory will be explained below.

8. The running lamp is displayed, the digital board is not displayed, there is no alarm sound, and there is also 74hc00p damage.

9. If there is an alarm sound, the basket motor and the ball baffle motor are running all the time, indicating that am-pld and 245 are not working or damaged.

At the end of the paper, it is explained as follows:

1. There is a 4-digit code out and several computers can be connected for setting the machine. All are binary to decimal, such as 0010 = 2 machines, 0100 = 4 machines.

If the code switch needs to be turned off and then turned on, it will take effect. After turning on, it will display several computers on the countdown digital board. After a few seconds, it will jump to the interface where you can coin and play games. If other machines are not connected to the machine line, it will stop at the interface that shows several machines can be connected.

2. The sound storage IC is divided into background music, coin, ball and alarm sound. Am-u12 is the background sound of the first 40 seconds, am-u13 is the background music of the last 20 seconds, am-u15 is the coin, ball and alarm sound. If there is no music in the cut-off time, the IC may be damaged.

3. This motherboard also has a certain power on self-test function, which can see the running lamp and give an alarm when the running lamp is good.

a. Set and test the button. If the socket of the code meter is not plugged in, the running light will show count-in.

b. The coin-1 and coin-2 will be displayed if the two coin lines are not plugged in.

c. If the basket motor is not positioned in the middle, it will give an alarm, and the basket motor will keep turning and display set-mot-1.

d. If the ball baffle motor is not positioned, it will also give an alarm. The ball baffle motor keeps turning and displays set-mot-2

2) Machine equipment training (equipment principle, equipment maintenance, equipment service, equipment publicity and promotion)

A. Basketball machine B. gift machine C. music machine D. children machine E. coin machine F. fighting machine g. simulator

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