Re: TOA BG-130 Amplifier power supply fuse blown
So I checked the main power transistors (attached to the heatsink) using the "Diode" function on my DMM.
The results are a little confusing.
The first two D2059 transistors have similar results.
Pins 1 & 2 = .538
Pins 1 & 3 = .541
Pins 1 & 2 = .540
Pins 1 & 3 = .542
I get no other readings ("OL") using any other polarity or pins
The second two B1367 transistors are wildly different from each other
B1367 #1
Pins 1 & 2 = .523
Pins 1 & 3 = .525
No other readings using opposite polarity, like the D2059's.
B1367 #2
Pins 1 & 2 = .027 (Both polarities - odd!)
Pins 1 & 3 = .463
Pins 2 & 3 = .459 (Didnt get this read on the other B1367!)
-------------------------
D110 is a "15b2" silkscreened label
Reads "OL" one polarity, 0.650v the other way
D109 is a "15b2" silkscreened label
Reads "OL" one polarity, 0.642v the other way
-------------------------
R179 i can't identify. I've included a pic so you guys maybe can read what exact colors those might be
It reads 0.664 kOhm with my multimeter.
So I checked the main power transistors (attached to the heatsink) using the "Diode" function on my DMM.
The results are a little confusing.
The first two D2059 transistors have similar results.
Pins 1 & 2 = .538
Pins 1 & 3 = .541
Pins 1 & 2 = .540
Pins 1 & 3 = .542
I get no other readings ("OL") using any other polarity or pins
The second two B1367 transistors are wildly different from each other
B1367 #1
Pins 1 & 2 = .523
Pins 1 & 3 = .525
No other readings using opposite polarity, like the D2059's.
B1367 #2
Pins 1 & 2 = .027 (Both polarities - odd!)
Pins 1 & 3 = .463
Pins 2 & 3 = .459 (Didnt get this read on the other B1367!)
-------------------------
D110 is a "15b2" silkscreened label
Reads "OL" one polarity, 0.650v the other way
D109 is a "15b2" silkscreened label
Reads "OL" one polarity, 0.642v the other way
-------------------------
R179 i can't identify. I've included a pic so you guys maybe can read what exact colors those might be
It reads 0.664 kOhm with my multimeter.
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