About Contact Us Free Shipping Safety Tips Beats By Dr. Dre Clubs VIP: Sign in  |  Register
Currencies:
Home / News > Sound failure do not blindly fiddle, according to this method quickly find the crux!

News

Sound failure do not blindly fiddle, according to this method quickly find the crux!

First, observe the inspection method

The observation check is done immediately after disconnecting the power supply. Without the instrument, instrument, with an intuitive feeling, to mobilize the visual, hearing, smell, touch and other four kinds of sensory characteristics, to judge. Although this method of inspection is less accurate, but the speed, observation inspection method is particularly useful for power failure check.

one look

Observe the machine or part and its external structure. See whether the key switch, interface, indicator light loose, whether the circuit board wiring off, with or without solder, discoloration, cracks, burst and other phenomena, whether the fuse blown, ignition, smoke, deformation, Problem with eye, direct identification and judgment.

Second, listen

Gently flip beats by dre studio the machine or parts, swing swing, listen to whether the parts scattered or screw off the situation, whether there is a collision sound. For continuous flip with or without abnormal "creak" sound or "flap" of the fire (when power). If these phenomena occur, the failure may occur in these places.

Three, smell

Smell the smell with beats by dre studio the nose, find the source of the smell, the fault may be from the place where the smell.

Four touch

Touch the transformer housing (after power failure), do not touch the terminal, because sometimes because of charging capacitors exist, the voltage is very high, endangering security. Feeling, whether it exceeds the normal temperature, hot, can not touch. Power tube with or without hot or cold phenomenon. Adjust the tube with or without hot or cold is not hot phenomenon. If there are these phenomena, the problem may arise in these places.

Second, the test method

The heuristic method is for the suspected part of the circuit using comparison, substitution, segmentation, simulation and other means of testing, looking for the fault, and then excluded. The specific method is as follows:

1, comparison

Find a machine that is exactly the same type as the faulty machine. Use the left and right channel parts of the same machine in a professional device to measure the voltage, resistance, and current of the corresponding part, and compare it to find the fault.

2, alternative

Replace the suspected components with good components, or swap the left and right channel components, especially for the integrated circuit block. If the machine is returned to normal after the part has changed, it indicates that the part is defective or damaged.

3, split

Will be part of the circuit and other parts of the disconnected, connected to the external power supply, injection signal, to judge.

4, simulation

Temperature simulation, the use of hair dryer heating, or alcohol cooling, temperature performance inspection, vibration simulation is the use of fine plastic insulation sticks click on some parts, look at the circuit work conditions, you can find some solder welding phenomenon, check the fault The This method is generally carried out by skilled practitioners, otherwise, prone to increase the phenomenon of failure.

Third, the static parameter measurement method

Static parameters of the measurement must be held by the manufacturer of equipment maintenance manual, indicating the various components of the terminal static operating current, or voltage, the use of multimeter to measure the various parts of the circuit current, voltage or resistance value to see if the nominal value is consistent.

1, voltage measurement

In this measurement process to consider the multimeter resistance to the measured value of the impact. Static measurements are not the same as dynamic measurements (when adding signals), which should be noted. Measure the static voltage when the transistor beats headphones pin, resistance, capacitor voltage is consistent with the nominal value, the relative voltage of the crystal pin to determine whether the damage to the tube.

2, resistance measurement

Do not use the R 10K file with the ohm file 100 or 1K file of the multimeter. In the case of power failure measurement, if the charging capacitor exists, must be insulated with a screw from the cone after the full discharge. Measure the resistance in the line must be welded to one end, otherwise the measurement is not accurate.

3, current measurement

When using direct measurement, the ammeter into the circuit, check the current size. When indirect measurement is used, the voltage across the voltage is measured and the voltage value is removed by the resistance value.

In addition to static parameter measurement, but also the use of dynamic inspection method, the use of signal sources and oscilloscopes, direct beats headphones injection of the signal to check the circuit. This method is direct, accurate, and is not easy to damage components, but also on the circuit and mechanical structure adjustment and proofreading.

Fourth, dynamic inspection method

In addition to static parameter measurement, but also the use of dynamic inspection method, the use of signal sources and oscilloscopes, direct injection of the signal to check the circuit. This method is direct, accurate, and is not easy to damage components, but also on the circuit and mechanical structure adjustment and proofreading.