Hello,
First time post. I recently came across a 200a4 with the top upper 2 left mosfets blown all other components (visually) look fine. I found suitable replacements but the thing still will not turn on. Should I replace the other 6 fets on that side (Left side of pic)? Any help or tips would be appreciated.
Thanks
First time post. I recently came across a 200a4 with the top upper 2 left mosfets blown all other components (visually) look fine. I found suitable replacements but the thing still will not turn on. Should I replace the other 6 fets on that side (Left side of pic)? Any help or tips would be appreciated.
Thanks
Attachments
Post the DC voltage on all 16 pins of the TL494. Place the black meter probe on the amplifier's ground terminal. Place the red meter probe on the point where you need to measure the voltage.
IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
Here they are as best as I could measure:
pin 1 = .05
pin 2 = 4.51
3 = .07
4 = .1
5 = 1.51
6 = 3.37
7 = 0
8 = 11.68
9 = 11.09
10 = 7.03
11 = 11.68
12 = 11.68
13 = 4.93
14 = 4.93
15 = 4.93
16 = 0
I believe I started at the correct pin there was no notch on my chip to designate the top. If these voltages don't make sense let me know.
thanks
pin 1 = .05
pin 2 = 4.51
3 = .07
4 = .1
5 = 1.51
6 = 3.37
7 = 0
8 = 11.68
9 = 11.09
10 = 7.03
11 = 11.68
12 = 11.68
13 = 4.93
14 = 4.93
15 = 4.93
16 = 0
I believe I started at the correct pin there was no notch on my chip to designate the top. If these voltages don't make sense let me know.
thanks
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