Schematics for NEC 602 CDROM Drive?

[AudioNewb]

Okay, then, we're off and rolling! Here's the final parts list in case anybody else is interested:

1. Mouser part #: 575-413314
110-13-314-41-801000
Mill-Max Capacitor Sockets
14P GLD PIN GLD CONT

2. Mouser part #: 647-UHE1H560MED
UHE1H560MED
Nichicon Low Impedance Aluminum Electrolytic Capacitors - 105 Degree
50V 56uF 6.3X11

3. Mouser part #: 80-C412C104J5R
C412C104J5R5CA
Kemet Conformally Coated Axial Ceramic Capacitors
50V X7R .1uF 5%

4. Mouser part #: 271-97.6
271-97.6
Xicon 1/4W 1% Metal Film Resistors
1/4WATT 97.6OHMS 1% 50PPM

5. Mouser part #: 271-330
271-330
Xicon 1/4W 1% Metal Film Resistors
1/4WATT 330OHMS 1% 50PPM

6. Mouser part #: 505-MKP20.1/100/5
MKP2-.1/100/5
Wima Polypropylene Film Capacitors
100V .1uF 5%

7. Mouser part #: 623-2743001112LF
2743001112
Fair-Rite EMI Shield Beads on Leads
LF Z=68 OHM @ 100MHz

Mouser part #: 511-74VHC04B
74VHC04B
ST 5V Logic (HCF4xxx, M74HC/HCT, 74AC/ACT, 74VHC/VHCT)
DIP-14 Hex Inverter

Digikey part #: DS9638CN-ND
DS9638CN
IC DRIVER DUAL HS DIFF 8-DIP

Radio Shack part #: 276-150
Multipurpose PC Board

All the parts to build two of these things should be well under $20. I'll post a photo when I'm done!

Finally got around to building the thing. I don't have it hooked up yet, but I had completely neglected the actual size of the components in my original diagram, and that threw me off a bit. Might have been easier to use regular protoboard instead of the the stuff with all the traces I'm using (what I had laying around).

New diagram is attached...hopefully I'll get music running through it sometime over the long weekend!

 

[fastcat95]

Hello to All:

Does anyone have an unused (working) switching P.S.
for the NEC 602 external CDROM unit that they would
like to sell?

Thansk!

Fastcat

 

[Gcollier]

Hello to All:

Does anyone have an unused (working) switching P.S.
for the NEC 602 external CDROM unit that they would
like to sell?

Thansk!

Fastcat

Hmm, you could make your own PSU. I just used a 12V DC adaptor that had a good clean supply and hardwire it in place. You could also put your own adaptor plug on the back.

 

[Giorgio]

Could anyone please send me or make me available the NEC602 schematics? as far as I can see, neither the jpg nor the pdf links are active yet...

I was thinking about upgrading the clock, and adding SPDIF reclocking, with a separate power supply, but I have read a previous post in this thread that seems to suggest that a "super" clock is possibly not the most important thing to address, for CDR602. I am right, or my impression is wrong?

Thank you a lot in advance

Kind regards
Giorgio

Thank you a lot in advance

Kind regards
Giorgio

 

[DC Dave]

Here are the schematics. I would save them to your PC as I don't know how long I will be able to keep them up.

http://home.comcast.net/~dchnowski/NEC-CDR602_Schematic.pdf