SSLV1.1 builds & fairy tales

[Salas]

OK

To fix Vout can decrease R101-301 resistor to have more CCS?

Yes. Even trimming down by paralleling another higher value one on top.

 

[merlin el mago]

What value have I to look for 0.6R?

 

[Salas]

0.6-0.62 if with the first MOSFET

 

[merlin el mago]

Ok I will try, thank you.

 

[merlin el mago]

CCS resistor two paralleled 1.2R, Vout fixed 10.5V, two red Vref LEDs don't lit.

 

[Salas]

What CCS mA is indicated from voltage across the 1.2//1.2 R system?

 

[merlin el mago]

0.707 : 0.6 = 1.178A

 

[Salas]

Q104 has healthy Vbe?

 

[Salas]

Q101 Vgs healthy?

 

[Salas]

CCS resistor two paralleled 1.2R, Vout fixed 10.5V, two red Vref LEDs don't lit.

Output load is 5 Ohm?

 

[merlin el mago]

Q104 has healthy Vbe?

0V

 

[merlin el mago]

Output load is 5 Ohm?

Real load.

 

[merlin el mago]

Q101 Vgs healthy?

4.8V

 

[Salas]

0V

Very fishy. Remove Q104 and Q103 to check them with DCA. If they are both good (doubtful) then it must be Q105 to had betrayed them.

 

[Salas]

Real load.

Use two wire mode if not

 

[merlin el mago]

Sorry Salas DCA75 damaged, tried to repair vithout success.

 

[merlin el mago]

Use two wire mode if not

Used always two wire.

 

[Salas]

Oops. So without tester. Do this, after you remove Q104 replace it anyway. And see if Q103 Q105 show any D to S short on Ohmmeter.

Buy a cheap tester from eBay maybe. Does basic parts recognition stuff reliably. You know those naked little boards with screen and long test socket.

 

[merlin el mago]

ok

 

[merlin el mago]

Q103 Q105 both measured circa 80 ohms