now after replacing 494. it still go to protect . and now there is a short . coz my bench powersupply drop its voltage from 12v to 8v when amp is power on (idle)
Did you test the PS FETs to see how many failed?
The 530 isn't a good permanent sub. If you don't have at least 2 good IRFZ30s, you can use them for testing.
The 530 isn't a good permanent sub. If you don't have at least 2 good IRFZ30s, you can use them for testing.
PS FETs = power supply FETs (field effect transistors)
Read the following page in its ENTIRETY.
bcae1.com - Car Amplifier Repair Tutorial - The Basics
Read the following page in its ENTIRETY.
bcae1.com - Car Amplifier Repair Tutorial - The Basics
I did what u said put 2 fets . Still draw current and feta gettng hot
I re moved the 2 rectifier . Current draw is less but fets still hot.
After a min it will go on protect so 494 is good?
Iddnt put audio and speakers.
Is audio trans make damage? Short
Later il remove all audio transistors
Are all of the gate resistors within tolerance?
Are you 100% sure that the FETs you installed are OK?
Are the driver transistors OK?
Are you 100% sure that the FETs you installed are OK?
Are the driver transistors OK?
Yeah fets are good no short
Gate resistors yes
Transistor after the 494 pin 10 and 9
Will check it later
Oh i try to put speaker no sign of audio or power even touchng the rca
Gate resistors yes
Transistor after the 494 pin 10 and 9
Will check it later
Oh i try to put speaker no sign of audio or power even touchng the rca
Please (and this applies to anyone who needs repair help) use your sig line to list all equipment you have, editing it as equipment changes. Include the model numbers.
Top of page, menu USER CP >> EDIT SIGNATURE
Oscilloscope (yes or no)
Multimeter(s)
Type of signal source (grounded RCA shields preferred).
Soldering iron
Desoldering pump
Power supply
2 ohm current limiting resistor (hollow cylindrical ceramic 100w preferred)
Top of page, menu USER CP >> EDIT SIGNATURE
Oscilloscope (yes or no)
Multimeter(s)
Type of signal source (grounded RCA shields preferred).
Soldering iron
Desoldering pump
Power supply
2 ohm current limiting resistor (hollow cylindrical ceramic 100w preferred)