Seventh Circle Audio

Hi.
I will try to be as clear as possible with my bad english.

1_I bought two kits C84 and in one of them there were 2 ceramics capacitors 471 missing and 5 diodes 1N4002.

2_For C4, C7, C23 and C30 the circuit board does not indicat the polarity.

3_I have 2x 4,7uF/100V instead of 2x 4,7uF/63V on the BOM. Do I have to solder them in C4 and C7?

4_There is two grey capacitors with nothing written on, are they 102J (1000uH inductor) for L1 and L2?

Thank you.

Sorry, I think I have found an answer for the last question in this forum. The answer is yes.

1_I bought two kits C84 and in one of them there were 2 ceramics capacitors 471 missing and 5 diodes 1N4002.

If you believe there are parts missing from your kit, please e-mail the details to support@seventhcircleaudio.com and we'll get the missing parts out to you ASAP.

2_For C4, C7, C23 and C30 the circuit board does not indicat the polarity.

Those capacitors are non-polarized. They can be inserted in either direction.

3_I have 2x 4,7uF/100V instead of 2x 4,7uF/63V on the BOM. Do I have to solder them in C4 and C7?

Yes.

4_There is two grey capacitors with nothing written on, are they 102J (1000uH inductor) for L1 and L2?

They're not capacitors, they're inductors. You can check this by measuring their very low DC resistance. A capacitor will look like an open circuit to DC.

Hi. I have 2 more questions.

1_ on the BOM and assembly instructions, I have
U4 for LM 317T and U5 for LM 337T. My circuit board has U5 and U6. Can you tell the good way to solder LM 317T and LM 337T.

2_ At step 34 (for the power up and testing of C84) there is some differences with my C84, I have 3 OPA 2604 instead of 2 in the assembly instructions, and I also only have 2 trim potentiometers (R64 and R68) instead of 4 in the assembly instructions. So I Think the good adjustment methode must be different From the assembly instructions.

Thank you.

1_ on the BOM and assembly instructions, I have
U4 for LM 317T and U5 for LM 337T. My circuit board has U5 and U6. Can you tell the good way to solder LM 317T and LM 337T.

The BOM is wrong, consult the schematic for proper placement.

2_ At step 34 (for the power up and testing of C84) there is some differences with my C84, I have 3 OPA 2604 instead of 2 in the assembly instructions, and I also only have 2 trim potentiometers (R64 and R68) instead of 4 in the assembly instructions. So I Think the good adjustment methode must be different From the assembly instructions.

Install all the ICs and skip to step 38. Make sure the voltages are correct at U1, pins 4 and 8.

With power applied, measure the voltages at L3 and L4. If they're very close to 0V, you're done.