Stetsom Ex5000Eq DC on speaker terminal

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#21
By default, the SD terminal should be pulled to ground and allow the IC to produce output.

Do you see a square wave on the Hin and Lin terminals of the driver ICs?

If you resolder the driver IC SD pins, solder with the terminal lifted (for now) so you don't have to bend the terminal a second time, in case it's necessary to have it lifted again.
 
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#22
Perry Babin said:
By default, the SD terminal should be pulled to ground and allow the IC to produce output.

Do you see a square wave on the Hin and Lin terminals of the driver ICs?

If you resolder the driver IC SD pins, solder with the terminal lifted (for now) so you don't have to bend the terminal a second time, in case it's necessary to have it lifted again.
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I have removed the wrong pin #12 and it broke while bending to solder back therefore, I removed the IC and ordered new ones.
After replacing I will give update
 
#23
frederickirv said:
Thanks for your reply.
The rail voltage is 77 volts on one side and Yes, I'm getting approximately 39 volts half the on the positive speaker terminal which gives out a humming sound with the speaker pulled in. The low side has a rail of approximately 8 volts and just over 3 volts on the negative speaker terminal.
For the above question, I meant the amplifier's B+ terminal. I supplied 12v and when I test the voltage across the B+ and B- I'm getting below 8 volts
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Good morning,, I trust that all is well with you.
I'm awaiting the driver chips but I'm curious about the half rail voltage on the speak terminals. Can you tell whether both neg and pos Terminals should have the same or almost same half voltage? I'm really not sure
 
#25
Good day. I have received the driver ICs and replace same. I powered up the amp with two power MOSFET and it powered up fine, however one FET was heating up and I found one of the gate resistors shorted. It was replaced using ceramic resistor. Now I'm seeing 205v on the high side rail and a almost 0v on the negative. Can you please tell me the correct rail voltage for these amps?
Thanks.
 
#29
I replaced the resistor and the amp powers up find, I just want to know what's the rail voltage that should be present. I'm seeing 205v on the high side and 0 volts on the low side therefore, before I replace the output FETs I just want to ensure the rail voltage is correct
 
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