Hello, I have been working with the ITT8033 relay problem for a week now. The problem is that the relay constantly turns on and off. Sometimes for 2 minutes, 4 minutes, sometimes always, the sound is perfect on both channels, the outputs are solid, the capacitor resistors around the relay have changed, the result is the same, and when FM mode is selected, there is no sound, only Sw mode works. AM FM, no sound, please. Please help me, which elements should I look for?
Comments
Hello friend, first of all, thank you very much for your interest. Are you sure about the D801 24 VOLT zener diode? Can it be a fast diode? Both channels of the amplifier are solid. I listen to good quality music. As I said, the role sometimes turns on and off every minute, sometimes it works for 5 minutes without any problems. FM mode does not work, only SW MODE works. AM FM does not have any sound. No, I want to fix this part first, I'm about to go crazy, should I change the materials you mentioned?
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Hello Aktas,
Schematics
1.Check the outputs ,is there any DC level.
) diode.
2.Check the power supply voltage (-31.5 V) of the protector circuit.It has two functions,switch on delay and DC protection.
Check (and replace) the Q 805,804,803 transistors,C803 ,and D801 (24 V Zener?? very suspicious
If you remove the Q804,only the switch on delay works.
The phenomenon can also be caused by cracked solder joint of relay coil.
Good luck to repair.
tj
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FRIEND, THANK YOU VERY MUCH FOR YOUR INTEREST. Are you sure whether the d801 diode is a zener? Both channels of the amplifier work fine. I listen to music, but the role works like an idiot. It turns on and off. Sometimes, only SW MODE WORKS in radio mode. AM FM does not make any sound. I am going crazy. Please help me.
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