RIGOL DG1022A - help with low output level

[gpaJoe]

I just purchased a used RIGOL DG1022A. It powers up and the display appears to be operating normally, and all waveform options appear to be operating on the display. However, the output level of the generated signals are extremely low, like in the 10-15 mV range, regardless of the amplitude level setting. This is true for all waveform selections. I'm feeding this signal into a RIGOL DS1202Z-E oscilloscope. Selecting High-Z or 50-ohm has no effect. Does anyone have an idea of what the issue might be, or the faulty component that might be causing this behavior? I am also looking for a schematic for this unit--any suggestions for a source? ...Thanks for any help you can provide.

[bingo600]

Maybe this will help - They fix an opamp here
https://www.eevblog.com/forum/repair/rigol-dg1022-attempted-repair-%28and-reverse-engineering%29/msg950961/#msg950961



Some coil
https://www.eevblog.com/forum/repair/need-help-for-a-repair-for-the-rigol-dg1022a/msg2274588/#msg2274588

[gpaJoe]

Thanks! I'll check it out.

[MathWizard]

I'd check the output transistors, see if their Vcc seems ok, and if their Vbe makes sense.

[gpaJoe]

Thank you.  I'll do that.