Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 2nd July 2008, 02:09 PM   #1241
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
say that you have 8V in supply

say that you use any ordinary led (green, red , yellow) and they all are in range of 2V of working voltage

say that you don't need full brightness , forr what you need 20mA through led

say that you choose 10mA tyhrough led ( for my eyes always almodst too bright , too)

so - needed resistor is :

(Upsu - Uled)/Iled

(8V-2V)/0,01A = 600 ohms

use nearest bigger value - 620 ohms

dissipation in resistor = I^2xR = 0,01^2x620 = 0,06W , so plain 1/4W is good enough
__________________
my Papa is smarter than your Nelson !
tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb ; Papatreasure
  Reply With Quote
Old 2nd July 2008, 02:26 PM   #1242
Zigis is offline Zigis  Latvia
diyAudio Member
 
Join Date: May 2005
Location: Riga, Latvia
Very good calculation, Zen Mod!

However I use Cmoy amp powered by 9V bat. and use 10K resistor. with blue LED is VERY bright, with green,red normal bright.

If LED not work at all, there is not resistor value problem, some thing els is wrong.

Zigis.
  Reply With Quote
Old 2nd July 2008, 02:31 PM   #1243
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by Zigis
Very good calculation, Zen Mod!

However I use Cmoy amp powered by 9V bat. and use 10K resistor. with blue LED is VERY bright, with green,red normal bright.

If LED not work at all, there is not resistor value problem, some thing els is wrong.

Zigis.

you're right for both things ;

in any case - most led will be bright enough even with 1mA through them
__________________
my Papa is smarter than your Nelson !
tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb ; Papatreasure
  Reply With Quote
Old 3rd July 2008, 10:51 AM   #1244
diyAudio Member
 
Erik van Voorst's Avatar
 
Join Date: Mar 2006
Location: Rotterdam
Yesterday I checked everything again...and everything was okay so........

The best thing for me now is to built up the other boombox the JVC RC-EZ31 tomorrow and just put the 8V power supply to the motorboard (and line up dig out) that must do the trick.......
__________________
To baldly go where no man has gone before................(James Kirk)
  Reply With Quote
Old 3rd July 2008, 12:55 PM   #1245
Zigis is offline Zigis  Latvia
diyAudio Member
 
Join Date: May 2005
Location: Riga, Latvia
Erik, after searching and stopping display show numbers of tracks or 00 ?
  Reply With Quote
Old 3rd July 2008, 08:36 PM   #1246
diyAudio Member
 
Erik van Voorst's Avatar
 
Join Date: Mar 2006
Location: Rotterdam
No the display has neither light nor movement...it rotates but too fast to read toc.....and after a while it stops...

On the board I did remove the 100nano for 10 nano (wondercap)
__________________
To baldly go where no man has gone before................(James Kirk)
  Reply With Quote
Old 3rd July 2008, 09:06 PM   #1247
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Quote:
Originally posted by Erik van Voorst
No the display has neither light nor movement...it rotates but too fast to read toc.....and after a while it stops...

On the board I did remove the 100nano for 10 nano (wondercap)
Did anything else happen prior to changing that cap? I would consider reverting to the original capacitor if you find nothing obvious.

Sounds like the micro-controller/dsp is not getting powered properly or has no clock.. Check the ribbon to the display and make sure it is oriented properly. (You didn't plug in the ribbon backwards did you - on EZ32 this can be fatal.)

Check the clock make sure that it is present.

Check the ribbon cable that goes from the laser to the board - make sure it is seated properly and plugged in the right way. (Look at your rcez31 if you need a guide.)

Carefully recheck all of the work you have done since you last had it working and be careful...

Watch out for broken ribbon cables as they are easily broken and not too easy to replace.

I blew the controller in my first rcez32 and had to get another boom box so I know all about frustration..

On a good note mine is all finished and has been working great for about 2 months now. I am very pleased with the overall result and use it nearly every day.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 4th July 2008, 12:32 PM   #1248
diyAudio Member
 
Erik van Voorst's Avatar
 
Join Date: Mar 2006
Location: Rotterdam
Today I did put up the other rig....the -31

I left eveything standard ...and attached the new power supply
and had immediately a beautiful LOCK...

Music Maestro......

At least I have now all the time in the world to check the-51 careful with the use of your tips...thanks Kevin....

Her a pic....The Brothers 51 31
Attached Images
File Type: jpg stereo.jpg (62.5 KB, 1259 views)
__________________
To baldly go where no man has gone before................(James Kirk)
  Reply With Quote
Old 4th July 2008, 12:33 PM   #1249
diyAudio Member
 
Erik van Voorst's Avatar
 
Join Date: Mar 2006
Location: Rotterdam
My power supply.....
Attached Images
File Type: jpg trafo.jpg (60.8 KB, 1215 views)
__________________
To baldly go where no man has gone before................(James Kirk)
  Reply With Quote
Old 4th July 2008, 12:37 PM   #1250
diyAudio Member
 
Erik van Voorst's Avatar
 
Join Date: Mar 2006
Location: Rotterdam
....and what a lovely sight....partially modded -31....



But what I find strange is that with the 8 Volt only to the motor and no further supply my led is also lid....
Attached Images
File Type: jpg 31playing.jpg (93.3 KB, 1258 views)
__________________
To baldly go where no man has gone before................(James Kirk)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 06:53 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2