FirstWatt J2

[william2001]

When instructed to "measure across" a component, you are placing your meter leads on either side of the component. The circled points as indicated.

 

[77giampiero]

Grazie william2001, allora:
nessun cortocircuito con il dissipatore di calore
tensione circa 23 VDC (che aumenterà con il nuovo alimentatore)
R7, R8, R10...........0,0 VDC!!!!
Offset CC..............circa 20 VDC!!!!! (che non si muove nemmeno ruotando P1)
mio Dio..

 

[Zen Mod]

meaning of "across resistor" is - black probe on one pin of resistor, red probe on second pin of resistor

on the other hand - when it's said "voltage at some point", it is always referenced to GND, so black probe on GND (where is convenient) and red probe at said point

I know it's not easy going through google translate ...... so ask freely whatever you need, to be sure that you got what was meant

 

[Zen Mod]

Grazie william2001, allora:
nessun cortocircuito con il dissipatore di calore
tensione circa 23 VDC (che aumenterà con il nuovo alimentatore)
R7, R8, R10...........0,0 VDC!!!!
Offset CC..............circa 20 VDC!!!!! (che non si muove nemmeno ruotando P1)
mio Dio..

as it was said:

• confirmation that there is no short between outputs and heatsink
• confirmation of rail voltages
• voltages across fat resistors in output stage (R7, R8, R10)
• voltage across P1 and note of its setting ( maxed or not)
• DC Offset voltage

so, be sure that you confirm and write here both rails

and, P1 situation?