PeeCeeBee V4 GB!

[nanakos]

and the mosfet bias?

 

[asuslover]

v4 amp

Nichicon KA 3300uf and nichicon PW 220 uf and silver mica capacitors. Really good sound , very nice,
thanks Shaan

Ps: I did listen this YouTube 20 times already

 

[shaan]

and the mosfet bias?

Sorry for late reply. 100mA.

 

[shaan]

Nichicon KA 3300uf and nichicon PW 220 uf and silver mica capacitors. Really good sound , very nice,
thanks Shaan

Ps: I did listen this YouTube 20 times already

Great! Don't forget to post pics of your complete amp too.

Thanks

 

[nanakos]

Shaan now i have problem with second pcb.Left led is off and the other lights up on very bright.I have checked all the transistors and seems ok.I'm using the same PS DC41v but left mosfet has 60+v and the other 21v.Any ideas please?

 

[shaan]

Is the off LED okay, or possibly placed in reverse?

 

[nanakos]

no its ok

 

[shaan]

Are the two 1N4007 diodes placed correctly?

 

[nanakos]

I changed the led and lights up but the other is very very bright and the voltage on mosfet is 70v.The other mosfet with the new led has 15v.

 

[shaan]

Check the two 22k resistors. Are these soldered to correct places?
What is the two LED's voltage rating?

 

[shaan]

Also, are PGND, SGND and heatsink body connected to ground?

 

[nanakos]

The 22k resistors are ok and the leds are 1.8v

 

[nanakos]

Yes both connected.Why the voltage has such different between two rails? 13v-71v?

 

[shaan]

Are the power rails measuring such difference? Sound like the issue is in the psu!

 

[nanakos]

no it has 41v-41v and with the same psu the other module sounds PERFECT

 

[jls001]

Yes both connected.Why the voltage has such different between two rails? 13v-71v?

Do check continuity from the three legs of output MOSFETs. It looks like one leg which shouldn't be shorted to ground is grounded.

 

[nanakos]

Seems ok the continuity from mosfets

 

[shaan]

What voltage do you read between output and ground?

 

[nanakos]

Output?do you mean speaker out or what?

 

[shaan]

Output?do you mean speaker out or what?

The output terminal on the module and ground terminal on psu.