troubleshooting purifi EVAL6 1ET6525SA with SMPS1200A400 error

[kitj]

I built a kit from soundImpress - Purifi Eval6 with SMPS1200A400 power supply.

I'm new to electronics, and got as far as i can with manuals but found some things i can't understand

Assembled, turned on, front indicator LED turns on, no sound.
Case opened. No indicator LEDs lit on FE board or modules
Tested with multimeter on fe board:


J3 1 is 0v (with S1 standby switch in either position this confused me - i thought it should flip ampon)
J3 2 is not connected
J3 3 is 20v
J3 4 not connected
J3 5 +12v
J3 6 0v
J3 7 -12V

I tested the J10
J10 1 is +65v
J10 9 is -65v


As far as i know, J3 3 should be 3v in normal operation, and 0v in error.
20v is alarming and i have no explanation for it

I'm not sure what to test next to understand further

 

[NTK]

Welcome to ASR!

Have you checked if your SMPS1200A400 was set to output unregulated Vaux, per Purifi's application notes?

It seems from your measurements of J3-5 and J3-7 (+12 V & -12 V), the SMPS was set to output regulated Vaux instead of unregulated (±22 V).

 

[kitj]

Just got home and flipped the jumpers - that was exactly right. All working fine now.

Thank you so much!

 

[NTK]

Just got home and flipped the jumpers - that was exactly right. All working fine now.

Thank you so much!

You are welcome. Happy Thanksgiving Day (if you are in the US).