Yesterday I received a synth with very low output level and no headphone output at all.
Googling around to find something related, I have found that the problem is a smd resistor which is placed between the PSU (DC 12v 0.5a)and a pair of audio amplifiers (5532 dual opamp for the main outs - LM1877 for the headphones out). Basically the resistor is blown, so the circuit is open and the amplifiers have no supply (5532 has some, via its feedback resistors).
Now, someone repaired the fault just placing a simple wire instead of the resistor, but I'm afraid to do so, because a spike could damage the amplifiers...
The synth support told that the resistor should be 6.8 ohm, 1/4 watt... But I'm not sure, because mine is burnt and the first digit is a 5, not a 6...and the component metric is 0805...which usually is for 1/8 watt resistors.
What should I do?
Googling around to find something related, I have found that the problem is a smd resistor which is placed between the PSU (DC 12v 0.5a)and a pair of audio amplifiers (5532 dual opamp for the main outs - LM1877 for the headphones out). Basically the resistor is blown, so the circuit is open and the amplifiers have no supply (5532 has some, via its feedback resistors).
Now, someone repaired the fault just placing a simple wire instead of the resistor, but I'm afraid to do so, because a spike could damage the amplifiers...
The synth support told that the resistor should be 6.8 ohm, 1/4 watt... But I'm not sure, because mine is burnt and the first digit is a 5, not a 6...and the component metric is 0805...which usually is for 1/8 watt resistors.
What should I do?