- - soldering
- - tin
- - circuit
- - screwdriver set
- - LED voltage check
If the receiver is no longer activated, checkIt comes if the supply voltage, fuses are OK, protective diodes, sensors and stabilizer.In identifying the faulty element repair or replace it.
If removable panel audio does not work lights, check the lamps and the integrity of the chain of supply, reliability of connections directly to the removable connector element and Repair.
in all modes When no sound, a possible cause of failure can be the fault of the chip.To get started, check the voltage at the output of the audio signal, and in other parts of the chain.If the voltage is supplie
d, but no sound is heard, it will be necessary to solder the chip.Works produces special soldering iron - the most carefully and accurately.Focus on the diagram posted in the manual car.
If enough high sensitivity AM tuner Check the bandpass filters, diode assembly and the availability of signals to control the tuner modules.Ascertain nature of the problem, you can quickly fix the car radio .At low sensitivity FM- tuner must also check the serviceability of elements on the output transistor and related circuits.
If you do not play discs that are the likely cause of failure can be malfunction of the switching node, or sound processing unit.But before you start to solder the chip, check the connector connections CD recorder, the reliability of the connection.
Tip 2: How to repair a radio
Almost any car can not do without the installation of modern and powerful radio.It often happens that in the radio failure occur, for example, when reading the disc or shot down setting when playing audio.To understand the nature of the damage, it is necessary to remove and repair the radio.You can do it yourself or take the radio in the car repair shop.
- - a set of tools.
Stop engine car.Remove the tape recorder, if you want to do the repair yourself.Pull it out of the special housing and disconnect the wires.Since the cassette is mainly located at the front panel, as a result of ventilation and heating systems in the radio enters a large amount of dust, which leads to overheating and failure of the electronic components and premature wear of mechanical parts of the device.
Open the metal cover from the radio circuit board.Inspect and check for PCB tracks charred, burnt items or nepropaek.If found burnt track, restore it.
Check the electronic components, reveal the top metal cover and remove the four mounting bolts with which attached CD / MP3 deck.Remove the disc deck, be sure to detach the two loops that are connected to the main board.Usually, all cables and connectors are disconnected quite easily, without requiring additional tools.
Find a protective diode on the board, which is usually located near the supply chain and the main connector.Vypayat this diode and check its resistance in the forward and reverse inclusion.A diode is a one-way conductivity.Since it is protected by the throttle filter vypayal first throttle, and then the protective diode.
Inspect the protective diode.Swap probes multimedia.In the case when the multimeter displays zero resistance, it means that the breakdown diode.Look brand diode and replace it with the same.
Before solder the new diode check for serviceability.In principle, the tape recorder is working without a diode, but if something unexpected happened, "emergency" may suffer amplifier chip and other important radio systems.
Check the wiring and instruments onboard network of the machine before connecting the car.
not repair the radio with the engine running the machine.
not Tutor repair radios, if the warranty period has not expired, because the technique, the integrity of the body which is broken, warranty does not apply.
Choose a model known manufacturers that establish long-term warranty.Trust installation of car radios only to professionals.
- Tips repair Unit