I have Philips CD radio MC175 and I need to make a CD digital output(COAX) to it to feed external DAC. I think the unit mark is ECO-SL Mk3. Where and how is the best to take it? I marked the place on the schematics where it says "for external DAC 3x220R". Is that the place through 220R resistors?
Attachments
Last edited:
What do you mean by external DAC? Do you mean DAC chip or a manufacturers DAC - the latter have digital or Toslink input.
If you are talking DAC chip, then yes, those 3 lines are required. Depending on the DAC device you plan to use, there may be other lines n eeded like deemphasis, muting etc.,
If you are talking DAC chip, then yes, those 3 lines are required. Depending on the DAC device you plan to use, there may be other lines n eeded like deemphasis, muting etc.,
I have an external DAC unit with power supply and preamp that has COAX IN(RCA plug) and AUDIO OUT. Since the COAX consists of two lines I need some help of choosing the right spots and maybe need to add some additional components.
ok, i understand you are not connecting to a DAC chip so those two wires won't do it.
I cannot read the main diagram but at the bottom, just right of middle it says DIGITAL OUT and in right hand bottom corner there appears to be a LED, possibly for TOSLINK?. Almost certrainly wou will find the signal. It is likely the signal for TOSLINK is TTL - it will need to be converted to SPDIF - this is done by an inverter circuit, like below.
I cannot read the main diagram but at the bottom, just right of middle it says DIGITAL OUT and in right hand bottom corner there appears to be a LED, possibly for TOSLINK?. Almost certrainly wou will find the signal. It is likely the signal for TOSLINK is TTL - it will need to be converted to SPDIF - this is done by an inverter circuit, like below.
Attachments
you need to check out what is atthe end of that wire; should be a driver such as the example IK posted. The COAX resistors should drop TTL to about 1.2 V peak-peak.
Your Schematic already tells how to get COAX Digi Output.
See attached pic and then you need something like this......................
( https://uk.rs-online.com/web/p/audio-transformers/1068575 )
P.
See attached pic and then you need something like this......................
( https://uk.rs-online.com/web/p/audio-transformers/1068575 )
P.
