SONY SCD 777ES locked up - diyAudio
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 9th July 2009, 05:42 PM   #1
diyAudio Member
 
Join Date: Jul 2009
Default SONY SCD 777ES locked up

Does anybody know of a way to reset the controls on a SONY SCD 777ES? I put in a CD-R that had played fine before and the display said "unreadable" then when I tried to eject (remove) the disc the top loading door cannot open. Tried unplugging and plugging back in but no change. PLEASE help - I miss my player!
  Reply With Quote
Old 9th July 2009, 06:04 PM   #2
diyAudio Member
 
QSerraTico_Tico's Avatar
 
Join Date: Oct 2004
Lightbulb Re: SONY SCD 777ES locked up

Quote:
Originally posted by peteblakejr
Does anybody know of a way to reset the controls on a SONY SCD 777ES? I put in a CD-R that had played fine before and the display said "unreadable" then when I tried to eject (remove) the disc the top loading door cannot open. Tried unplugging and plugging back in but no change. PLEASE help - I miss my player!

Get the service manual in order to know how to put it in service mode.
  Reply With Quote
Old 9th July 2009, 06:49 PM   #3
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
This works very often if your absolutely sure it's electrically locked up .... or knob-locked as we used to call it. First check for a backup supply to the main microprocessor... it may or may not have one, usually derived from a coin type cap. If it has discharge it slowly via a resistor. Check for residual voltage across ALL the main rails and discharge them if needed.
And then... seriously, but you have to be 100% sure there are no caps left charged up, such as to the FL display etc etc, THEN AND ONLY THEN, take some aluminium foil and press it over the whole PCB around the microprocessor and system control IC's and leave it for several minutes.
It's not madness, it's a workshop technique that can "fix" many problems like this. IC's can lock up and slight residual charge stops them reseting correctly when you keep powering it up. We are talking voltages in the 10's of millivolts here.
BUT YOU HAVE TO DO IT RIGHT.
Alternatively you can leave it for 24 to 72 hours and just see what happens.
  Reply With Quote
Old 10th July 2009, 08:58 PM   #4
diyAudio Member
 
Join Date: Jul 2009
discharging all the capacitors sounds scary as I have no real electronics tech knowledge. I will try to find a service manual i guess. Thanks for your help
  Reply With Quote
Old 11th July 2009, 03:12 AM   #5
diyAudio Member
 
aparatusonitus's Avatar
 
Join Date: Jan 2004
Location: Split, Croatia
Quote:
Originally posted by peteblakejr
I will try to find a service manual i guess.
You can download service manual for free from http://www.hifiengine.com/manuals/sony/scd-777es.shtml
but first you have to register.
__________________
Non é mai abbastanza...
  Reply With Quote
Old 11th July 2009, 02:19 PM   #6
diyAudio Member
 
Join Date: Jul 2009
I found a copy of the service manual and did the section 5 TEST MODE routine. All did what it was supposed to and thus got the display readout indicating "the key check terminated successfully" but player still has the same problem... I cannot understand the manual well enough to decide if I should try the "ADJUSTMENT MODES" - I removed the CD-R and the weight/puck when I took the top off as required to short the two terminal to get into the TEST MODE... no idea what to do now... display just reads "CLOSE" or blinking "UNLOADING"
  Reply With Quote
Old 15th July 2009, 10:35 AM   #7
fas948 is offline fas948  Germany
diyAudio Member
 
Join Date: Jun 2009
Test the 3 fuses on the power supply, it very likely that one of them is bad. These fuses are for the digital power section.
  Reply With Quote
Old 18th July 2009, 05:59 PM   #8
diyAudio Member
 
Join Date: Jul 2009
Quote:
Originally posted by fas948
Test the 3 fuses on the power supply, it very likely that one of them is bad. These fuses are for the digital power section.

Just got your message. Thanks a lot! I'll check the fuses and let you know what I find...
  Reply With Quote
Old 18th July 2009, 06:00 PM   #9
diyAudio Member
 
Join Date: Jul 2009
How did you know that? I don't have a replacement fuse yet to confirm fix but the fuse furthest of the 3 from the transformer is broken. Will advise further. Thank you, thank you!!!!
  Reply With Quote
Old 20th July 2009, 04:08 PM   #10
fas948 is offline fas948  Germany
diyAudio Member
 
Join Date: Jun 2009
“How did you know that?”

I have good technical understanding for these models (SCD-1/SCD-777es), these are the best players Sony has ever build and with the proper modifications they can sound better than any player costing over 10K.
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sony SCD-777ES MODS kevinkr Digital Source 51 15th March 2013 09:19 AM
Sony 777ES laser djmiddelkoop Digital Source 95 12th April 2007 11:27 PM
Sony SCD-1 or 777ES S-TACT Bypass David Garretson Digital Source 0 27th February 2006 04:53 PM
Sony tava 777es pre outs cld1354 Solid State 0 3rd June 2003 09:49 AM


New To Site? Need Help?

All times are GMT. The time now is 08:23 PM.


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