Audio Creative DDDAC1794 Скачать руководство пользователя страница 10 | Manualshive

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Audio Creative DDDAC1794 Скачать руководство пользователя страница 10

Audio

Ω

Creative

DDDAC1794

10

Specially here it make sense to cut very short (2mm above PCB area) and (optionally)
resolder the connections. If more modules are mounted above each other we must avoid
that long wires sticking out are shortcutting against the capacitores on the below deck.

Now the same with the two 47uF capacitors

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Содержание DDDAC1794

Страница 1: ...94 module De voltage regulation at the analog side of the system has now an embedded Tentlabs Shunt regulator The Bias through the much discussed pin 20 got a constant current source CCS which replaces the fixed 6K1 resistor All resulting in the next stage of superb sound reproduction ...

Страница 2: ...Keep the tip clean by wip ing every time across a wet sponge Only keep a lot of tin on it when you let it cool of This will increase the life time of the tip Further necessary tools are a fine cable cutter beak tang and tweezers or platbek tang For easy mounting of the module on the mainboard it is good to use a screwdriver and a socket spanner The construction time of one module is approximately ...

Страница 3: ...T install the trimmer and 100Ohm resistors The SMD parts are already mount ed so you only have to install the resistors and trimmer De original 6k1 is an option in STEAD of the CCS TIP only do this to experiment The CCS is a very nice upgrade you most likely want Combining old and new DAC Module boards is no problem at all They are fully backwards compatible To do this is up to you of course But t...

Страница 4: ...hm resistors on the PCB The bending tool see picture above is a very handy tool to make a perfect fit The PCB has exact this distances Let the solder flow nicely round the wires must be shiny and cut the wires with the cable cutter Cut them directly above the solder pad ...

Страница 5: ...the two 100Ohm resistors Heat it well and take the time needed to have the solder flow nicely Cut the wires and you might want to re heat re solder shortly the connections so it even looks better This is not a must just some perfection thing ...

Страница 6: ...em on the pcb and slightly bend the two wires to the outside so they will not fall off the board anymore Place the PCB on its back on a flat working space Make sure all capacitors are placed correctly Press slightly to make sure this is the case Now solder all 36 connections Cut them short with the cable cutter ...

Страница 7: ...AudioΩCreative DDDAC1794 7 It will look like this at this stage ...

Страница 8: ...lcos There are 12 pcs of the 10uF and 2 pcs of the 47uF Elcos to be mounted When placing the elcos make sure check AND double check that the polarization plus and minus wires are correct A wrong connection is very difficult to correct after they are soldered ...

Страница 9: ...ain take your time to let the solder flow Specially the minus poles are at the ground plane which will attract quite some heat in the first few seconds when the solder tip is placed So do not bake the solder on the pads Let it flow ...

Страница 10: ...cut very short 2mm above PCB area and optionally resolder the connections If more modules are mounted above each other we must avoid that long wires sticking out are shortcutting against the capacitores on the below deck Now the same with the two 47uF capacitors ...

Страница 11: ...AudioΩCreative DDDAC1794 11 In between view of the PCB The voltage regulators Before mounting we bend the pins with the platbek tang Directly after the thicker part of the pins ...

Страница 12: ...AudioΩCreative DDDAC1794 12 Press the connection pins through the PCB Solder the middle pin with a small drop while making sure the voltage regulator is nicely placed on the PCB See image ...

Страница 13: ... it is best to cut the wires first a few mm above the PCB and than solder the two out side pins Do not forget to re solder the middle pin Trimmers As you can see the only thing missing are the two blue multi turn trimmers for the CCS ...

Страница 14: ...ck of the multi meter DMM to the analog output pin com from the main board Note that if you adjust the left channel you also use the com of the left channel and vise versa for the right channel of course The adjustment is not critical Nothing can go wrong Just turn till you have approximately 40mV Wait 20 minutes till the DAC is warm and check and re adjust a bit if needed IMPORTANT It is not allo...

Страница 15: ...ossible in this con struction manual we cannot exclude that still something is unclear In that case just email Audio Creative or DDDAC for further help Also feedback to improve on text or image is more than welcome Dick van de Merwe Doede Douma Audio Creative DDDAC Audio Design ...

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