Marantz CD-50 and CD-60, TDA1541, CDM4/19

Mayday · 2011-12-18 1:32 am

AndrewGM said:
The legs seem a bit long to me particularly on the DEM cap.
Why start on the 50 when the 60 is nowhere near finished ?

They are as short as can be with me still being able to get a solderingtip in there.

The CD-50 remains untouched, I meant later when it's that ones turn

Mayday · 2011-12-18 1:34 am

I'll order more shrink tubing on Monday too, couldn't fit these today for lack of isolationmaterial for the leads:

Mayday · 2011-12-18 11:32 am

The DEM cap replacement was a bigger improvement than I expected

Mayday · 2011-12-18 12:25 pm

Regarding the CD-50...
Is it possible to convert it to a DAC, ie put a digital input on it?
Loving the sound of the modded, although not finished CD-60 and would like to get that sound from my PC too.

Think I've asked this before but never had the question answered.

UV101 · 2011-12-18 4:08 pm

Yes, you'll need a receiver chip like a CS8412 and you'll then feed the i2s into the 7220 where it's currently connected to the 7310. You'd be better off with that DAC pcb you posted about the other day!

Mayday · 2011-12-18 4:15 pm

UV101 said:
Yes, you'll need a receiver chip like a CS8412 and you'll then feed the i2s into the 7220 where it's currently connected to the 7310. You'd be better off with that DAC pcb you posted about the other day!

I'll actually buy that pcb on tuesday or wednesday

Then I'll populate it in a pace I can afford.

Mayday · 2011-12-18 4:49 pm

Btw, are there any ready-made usb to i2s modules that are reasonably priced?
Or bnc to i2s?

UV101 · 2011-12-18 5:03 pm

Google is your friend! There are several options for USB. Not sure what you mean for BNC. Do you mean SP/DIF?

Mayday · 2011-12-18 5:18 pm

Hmm, my usb-dac has spdif out. Could I put an input on the cd-50 and add a switch to choose between cd and spdif in?

UV101 · 2011-12-18 6:31 pm

The answer is the same as the first time you asked!!

Yes, if you switch the 3 lines of the i2s between the 7310 and 7220. You will need to convert spdif to i2s with something like a CS8412.

Mayday · 2011-12-18 11:36 pm

UV101 said:
The answer is the same as the first time you asked!! Yes, if you switch the 3 lines of the i2s between the 7310 and 7220. You will need to convert spdif to i2s with something like a CS8412.

Ok, I was naive enough to think maybe the USB-DAC provided I2S

UV101 · 2011-12-18 11:41 pm

Mayday said:
Ok, I was naive enough to think maybe the USB-DAC provided I2S

It possibly does but you'll need to download the datasheets for the chips on the DAC and see what format it uses.

Mayday · 2011-12-18 11:47 pm

Just ordered the following, which should arrive during the week(Not just for the TPR).

Rubycon ZLH 470uF/16V 4pcs
LED 1,85V 6pcs
Resistor 100R 3W 1pc (dummy load)
Resistor 2R7 0,4W 1% 2pcs
Resistor 120R 0,4W 1% 2pcs
Resistor 100R 0,4W 1% 2pcs
Ellyt cheap, not low esr(for TPR) 100uF/16V
More isolationkits for TO-220
Heatsink TO-220 44x35x12mm(have an identical at home) 1pc
60m singlecore copper connectionwire kit (10m red, 10m black, rest 5m/colour, asorted colours) 1pc
1m shrinktubing 2,4mm

To order this week:
Clock (red one)
10PCS 270uF 16V SANYO SEPC OSCON SOLID CAPACITORS
1PCS AC 220V 30W DESOLDERING IRON
PCB TDA1541 / TDA1541A ( CS8412 / CS8414 + SAA7220) 1pc
2 pcs LM317T LM317 Voltage Regulator include Radiator
2 pcs LM337 Adjustable Voltage Regulator incl radiator

Mayday · 2011-12-18 11:48 pm

UV101 said:
It possibly does but you'll need to download the datasheets for the chips on the DAC and see what format it uses.

I've already decided to get the DAC-PCB so I'll skip that for now

Mayday · 2011-12-18 11:56 pm

I know it's an OLD discussion, but are there any caps on these cd-players that would benefit from a 0,1uF filmcap across?

Chris Daly · 2011-12-19 12:16 am

Why would you want to ruin any CD player with installing - or for that matter using SPDIF ?? see: The Deficiencies of SPDIF as a Digital Transmission Method

Cheers / Chris

Mayday · 2011-12-19 12:26 am

Chris Daly said:
Why would you want to ruin any CD player with installing - or for that matter using SPDIF ?? see: The Deficiencies of SPDIF as a Digital Transmission Method

Cheers / Chris

Like the sound of the modded TDA1541A/SAA7220P/B soo much I wanted the same sound from my main digital source, my PC.

But I'll build a DAC with the above IC's instead, so the question is now more or less obsolete.

Just took another look at my USB-dac and it's an ordinary coaxial digital out...is that the same as SPDIF?

I thought I'd use that "DAC" as a USB-Coaxial converter for the TDA1541A dac when it's done. I do have toslink out from my PC, but I'm unsure if the PCB I'll order accepts toslink.

Mayday · 2011-12-19 12:50 am

UV101 said:
The kits are excellent value for money. It will cost 2x the price if you try to source the components yourself. I ran mine off 2 transformers both 2x15vac) giving me the 4 rails. The regs will run fine even with a large voltage drop for the 5v stuff.

Entry level kit

This one also looks interesting although the clock looks to be recovered from the SPDIF in this model. On the plus side the output stage is fully discrete!!

HiEND-TDA1541-DAC-CS8412-SAA7220-assembled-borad

An externally hosted image should be here but it was not working when we last tested it.

I think there are a few threads on here about the 1st one. I think its refered to as the green dac?

The first kit, does it come complete w everything? The one I found from the same seller says:

Package Include
1. TDA1541A DAC DIY Kit (Stereo)
2. One TDA1541A, one SAA7220, one CS8414, and four NE5534
3. One adaptor board for CS8412/CS8414
4. Assembly Manual

Features
1. Use TDA1541/TDA1541A DAC, CS8412/CS8414(come with conversion PCB) receiver IC, and SAA7220 digital filter IC.
2. Output Opamps supports AD797/ NE5534/OPA627.
3. Input signal: Digital audio from CD player, e.g. S/PDIF
4. Output signal: Analog audio signal with high S/N ratio for pre amplifier or amplifier.
5. WIMA MKP capacitors, Nichicon Audio capacitors, and Dale resistors.
6. Built-in seven independent regulation circuits for dedicated power supply to each block.
7. Power requirements: one 9-12V AC, one 15V AC and two 18V AC
8. PCB thickness: 2.5mm and copper 2oz. Lead free

The second one, there's no clock onboard? Could it be upgraded w a vintage audio lab clock?

Might be cheaper to get these complete kits, but I think I can only afford the PCB for the first one atm...

AndrewGM · 2011-12-19 10:31 am

A DIR9001 is available on an adapter.
Apparently blows away the CS 84.. series chips ( lower jitter )
Read the specs.

I've looked at green one and like the discrete output stage - very nice way of doing things plus.....no op amps - what a bonus !!.
Just eliminates another headache imo

Mayday · 2011-12-19 10:45 am

AndrewGM said:
A DIR9001 is available on an adapter.
Apparently blows away the CS 84.. series chips ( lower jitter )
Read the specs.

I've looked at green one and like the discrete output stage - very nice way of doing things plus.....no op amps - what a bonus !!.
Just eliminates another headache imo

Is the DIR9001PW a direct replacement for the CS8412(no other modifications needed)?

Marantz CD-50 and CD-60, TDA1541, CDM4/19

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