冬季DAC 解碼製作班 實況

又再全院滿座!!

還有一部頂級摩改版 High-end 1541a!

有興趣的朋友請儘快留名, 等我們可儘快再加開一班
http://www.hififever.com/forum/viewtopic.php?t=1763

因早走未能聽到這部摩改版 High-end 1541a, 不知下一堂有否機會再試聽?
另外, high end Dac 的upgrade零件表可否email給我? 還有電源板上C42,C31,C16,C37,C15,C34,C10,C43,C22之電容值是100uf或是1000uf? 因提供的零件是FC1000uf35v與零件表上有出入. 功德無量

哇, 部DAC使唔使用咁大隻 E Cap 呀? :

To obtain a low ESR in traditional E.cap (cannot use OS-CON)

using the high voltage cap can do this.

Always found in Japan manufacturer model

KK.Ho (not at HK 2 week....   )

Hi KK,

Below refers to High-end version.  

When I'm checking the component from my package against the Schematic, component list and the PCB, I found following discrepnacies:

PCB DAC:
. The IC provided is CS8414, but the R1 and C3 provided is 1K & 0.047u respectively, not the one highlighted in your powerpoint: CS8418 match with 470 and 0.068u

. The C11 value from my package is 0.6h (measured via a multimeter), not 470p as stated on the schematic.

PCB IV2:
. R6 & R8 under Schematic is 10K, the value measured from my package is 20K
. C3 & C4 under Schematic is 220u, the value measured from my package and the component list stated is 47u.

PCB Power:
. From the Schematic and PCB, there is a L1 mentioned, I found no L1 from my package.

PCB REV(R101)
. R2 - R5 under Schematic and the component list is 470, the value measured from my package is 270.
. I found no C3 1000uF from my package

Please advise, thanks.

Please add me in, thanks

Cyrus,

PCB DAC:
. The IC provided is CS8414, but the R1 and C3 provided is 1K & 0.047u respectively, not the one highlighted in your powerpoint: CS8418 match with 470 and 0.068u

// We will change the correct value to you. Also for upgrade.

. The C11 value from my package is 0.6h (measured via a multimeter), not 470p as stated on the schematic.

// not understand your question, you can measure the 470pF using our equipment.

PCB IV2:
. R6 & R8 under Schematic is 10K, the value measured from my package is 20K

. C3 & C4 under Schematic is 220u, the value measured from my package and the component list stated is 47u.

// Please bring the components at next class


PCB Power:
. From the Schematic and PCB, there is a L1 mentioned, I found no L1 from my package.

// Admin will follow


PCB REV(R101)
. R2 - R5 under Schematic and the component list is 470, the value measured from my package is 270.
. I found no C3 1000uF from my package

// Admin will follow

Thanks KK Sir,

2 more queries for your attention:

1. Package for Power:
    Inside my package for C10, C15, C16, C22, C31, C34, C37, C42 & C43 are 1000u capacitors while from the component list and Schematic you provided, they are stated as 100u.

2. For the Green capacitor "nichcon MUSE" 100u 16V among all packages, can you tell how to differentiate which leg is positive and which is negative?  I can't see any indication from the cap.

Pls advise and best regards.

Sorry KK and Admin,

Any update on below item?  I would like to complete the soldering before attending lesson 2:

2. For the Green capacitor "nichcon MUSE" 100u 16V among all packages, can you tell how to differentiate which leg is positive and which is negative? I can't see any indication from the cap.[/list:u]

Thanks.

Please bring it at 19-JAN.

Or, you can soldering what you have components into PCB first.

KK.HO

tuesday night?

Tueday night is NOT OK.

Forget need to attend the wedding dinner.

WED is OK.

KK.

DAC  完成品預覽

Space is reserved for PCM1798 DAC. Seperated R-CORE for PCM1798 and TDA1541A.

Dual DAC in the box.

DUAL CORE.

Coming soon !

KK.HO

Cannot come on Wed night. Open on Sat?

yes, pls come after 10:30am

Updated photo at 26-Jan.

Admin:
Forget to take some of the classmate, he is fully complete the unit.
Don't fire me....