Hi, I've enjoyed my OPUS for a while now but the right channel is silent.
Perhaps the most notable reading is 2.42VDC on each of the two Right output channels, measured at the vias beneath the Wolfson; the Left Channel + currently has the 22uF coupling cap removed (measured it) and its reading is 2.792VDC; the via which goes to the - cap and output reads .307VDC (still has the coupling cap installed). Replacing the cap on the Left + channel changes nothing.
Zapped my Wolfson chip?
-Both power supplies are +7.5V.
-Both the + and - R outs are silent.
-Have just pulled one of the Elna 22uF output caps and it measures at the correct value, not blown.
-Bypassed the terminal strip and soldered the hot terminal of the R output jack to the - terminal of one of the two 22uF output caps; nothing.
-Reset all DIP switch settings on both boards.
-Checked the RCA output jack for continuity on signal and ground and it's fine.
-Swapped the output cables and sound comes out of both amplifier/speaker channels from the OPUS Left output jack. Cables and the rest of the system check okay.
-All four receiver LEDs are green.
-Receiver board DIP settings are:
1: Top (toward teh four SMD resistors R4-R7)
2: Bottom
3: Bottom
4: Top
DAC board DIP settings are:
1, IS2: Up (toward the silkscreened text, away from the power terminal strip/edge of the PCB)
2, DSD: Down
3, DEEMPH: Down
4, MODE: Down
5, IWO: Up
6, DIFFHW: Down
7, FSEL: Middle
8, MUTE: Top
9, OSR, Middle
Thank you for the great projects!
Perhaps the most notable reading is 2.42VDC on each of the two Right output channels, measured at the vias beneath the Wolfson; the Left Channel + currently has the 22uF coupling cap removed (measured it) and its reading is 2.792VDC; the via which goes to the - cap and output reads .307VDC (still has the coupling cap installed). Replacing the cap on the Left + channel changes nothing.
Zapped my Wolfson chip?
-Both power supplies are +7.5V.
-Both the + and - R outs are silent.
-Have just pulled one of the Elna 22uF output caps and it measures at the correct value, not blown.
-Bypassed the terminal strip and soldered the hot terminal of the R output jack to the - terminal of one of the two 22uF output caps; nothing.
-Reset all DIP switch settings on both boards.
-Checked the RCA output jack for continuity on signal and ground and it's fine.
-Swapped the output cables and sound comes out of both amplifier/speaker channels from the OPUS Left output jack. Cables and the rest of the system check okay.
-All four receiver LEDs are green.
-Receiver board DIP settings are:
1: Top (toward teh four SMD resistors R4-R7)
2: Bottom
3: Bottom
4: Top
DAC board DIP settings are:
1, IS2: Up (toward the silkscreened text, away from the power terminal strip/edge of the PCB)
2, DSD: Down
3, DEEMPH: Down
4, MODE: Down
5, IWO: Up
6, DIFFHW: Down
7, FSEL: Middle
8, MUTE: Top
9, OSR, Middle
Thank you for the great projects!
mouser.com have the Wolfson DAC IC for $13.00 and I'm not afraid of SMD soldering...may just take that route...
- Status
- Not open for further replies.