Pioneer CLD 704 Laserdisc Player Problem - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 7 Old 09-05-2003, 08:21 AM - Thread Starter
Member
 
KGratz's Avatar
 
Join Date: Jul 2001
Location: PA
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I am in the process of transferring some LaserDiscs to DVD (programs not avialable on DVD) My Pioneer CLD704 will not eject the disc. It won't play the disc that is currently in the machine either...it just flashes the display and then does nothing. I had the unit in the shop 2 times for this same problem and it keeps coming back. I have had the unit apart several times and can't seem to find the problem. I am guessing it is some type of sensor that has gone bad or is out of alignment. I have seen several 704s on e-bay for sale cheap with what seems to be the same problem.
Anyone have any ideas on where the problem may lie.

Any help is greatly appreciated. Thanks.
KGratz is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 09-05-2003, 09:50 AM
Senior Member
 
Tom J. Davis's Avatar
 
Join Date: Jun 2000
Location: IN
Posts: 256
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I have the same problem with 704 as well. Seems if I leave it unplugged for a minute then I have to play the disc again and then it will finally eject.

I'd like to know what this is as well.
Tom J. Davis is offline  
post #3 of 7 Old 09-05-2003, 09:55 AM
EC
AVS Special Member
 
EC's Avatar
 
Join Date: Aug 2001
Location: Toronto, Ontario, Canada
Posts: 3,059
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Oh crap! This happened to my 704 years ago. It ended up being the transport mechanism. I brought it to Pioneer Canada to get fixed and 3 - 4 months and $400 CDN later. I had a working unit again. Well not quite, the single CD eject mechanism didn't work after I received it. Brought it back to Pioneer and they fixed it on the spot. Pioneer says the transport mechanism had to be ordered from Japan thus the long wait. I hope Tom's solution works for you.

Eric Chong
My HT Pictures
EC is offline  
post #4 of 7 Old 09-05-2003, 12:26 PM
Senior Member
 
shadowpuppet's Avatar
 
Join Date: Jan 2002
Location: Bay Area, CA
Posts: 206
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
yup, this is a transport issue - mine has/had the same problem crop up every once in a while. do you happen to stack other components (or anything else for that matter) on the player?
shadowpuppet is offline  
post #5 of 7 Old 09-05-2003, 04:37 PM
AVS Club Gold
 
Kurtis Bahr's Avatar
 
Join Date: Jun 2002
Location: Northern Virginia
Posts: 818
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked: 22
Does the unit never eject the LD or do you have to wait a couple minutes before then the disc will eject? A dirty clamp surface on top of the spindle motor is a common problem that can cause this. The thickness of LD's do vary slightly and the thinner ones slip easier. This slippage which also happens when the LD just starts spinning can cause read errors and the circuitry cannot properly read the Table Of Contents so the machine either ejects the LD or just gets confused. I've repaired quite a few that just had this problem. If it stills fails once the clamp is cleaned then you have another issue. Here is a cleaning procedure.

1. Press Eject so the tray is out then unplug the unit.
2. Open the unit, in the middle above the spindle motor there is a bracket the
holds the top have of the clamp.
3. Remove the 4 screws, two on each side that hold the bracket and remove the
bracket and top clamp piece.
4. You can now easily see the clamping surface on the spindle motor. The
outter thin rubber ring is what grips the LD.
5. Firmly hold the spindle motor so it won't turn and take Radio Shack
Professional head cleaning solution and a cleaning stick, chamos sticks
preferred as they can scrub good
6. Scrub a section of the rubber surface then rotate the motor and scrub
another, Do this until throughly cleaned, you are basically resurfacing the
rubber surface so scrub HARD. Note: If the surface is bad/dryrotted it will
flake off during this. Don't worry as this means it was not good and needed
replaced anyway. This has only happened once in the countless players I've
cleaned.
7. Put it back together and test, if it still slips do it again until you are certain it is throughly cleaned.

Kurtis
Kurtis Bahr is offline  
post #6 of 7 Old 09-05-2003, 07:55 PM
Senior Member
 
kagato's Avatar
 
Join Date: Nov 2000
Location: Golden Valley, MN, USA
Posts: 463
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I agree with Kurtis. My 704 still does that. Hit eject and wait... A long time. The disc will eventually eject. I'll have to try the resurfacing as a have a number of LDs that have yet to make it back to DVD. Or when they made it to DVD they looked horrible.

  

kagato is offline  
post #7 of 7 Old 09-08-2003, 08:13 AM - Thread Starter
Member
 
KGratz's Avatar
 
Join Date: Jul 2001
Location: PA
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Thanks for all the suggestions.
I spent some time working on the player over the weekend and solved the problem!
I took the unit apart, removed the spindle clamp, removed the disc, checked the limit switches (there are 3 that I could find). I tried pressing them individually and in various combinations and nothing worked. Finally I figured I would try to simulate an end-of-disc situation...I rotated the pickup assembly into the top read configuration (side b read) and slid it into the center near the spindle. I then powered the unit. The pickup assembly sensed that it was not "home" and moved the assembly back and over. The spindle lowered and drawer opened...and now works great!
So, now I know what to do next time this happens!
If anyone ever encounters this situation, it might be a good "first try" to fix the problem. You must, however, be very cautious in being very gentle when you move the mechanism...it does appear to be fragile.
KGratz is offline  
Closed Thread DVD Players (Standard Def)

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

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