Ultrasonic baths unit unknow resistor

[jasko_jacker]

Hi , this is a ultrasonic washing machine circuit, one or two resistors
are damaged, I can not identify the color of the resistances to replace them,
someone can help me ?

[petehall347]

Re: Ultrasonic baths unit unknow resistor

brown black black gold 10 ohms and 5 % tolerance

[jasko_jacker]

Re: Ultrasonic baths unit unknow resistor

Ok, resistor n 2, that I have unsolder now, seems to be : brown black black gold, but
the 120 ohm reading from tester , indicates it's damaged.
I thought, that the heat changed colors.

[petehall347]

Re: Ultrasonic baths unit unknow resistor

brown red brown is 120 ohms . do you not have the schematic ?

[jasko_jacker]

Re: Ultrasonic baths unit unknow resistor

No schematic, this is an oscillator that works on two frequency, 40Khz and 25 Khz.
For this purpose there are two BUT11A and some 630v capacitors with a few resistors around 3 or 5 watt ?
Because the voltage is around 400 v the value of resistors must be exact.
I have no time to create a schematic from the board, so the situation is in stand by.

[petehall347]

Re: Ultrasonic baths unit unknow resistor

looking again the heat may have changed the colours to black . so it could well be 120 ohms .

[jasko_jacker]

Re: Ultrasonic baths unit unknow resistor

I warmed up the resistor, and actually brown (and, unfortunately, other colors) becomes black. If I take as an accurate meter reading, are two 120 ohm resistors.