Andrew-ok 18 pin thing is ok, 4 pin thing is ok. The clock side of things is hidden under the DAC board and over the mother board. Slightly more activity disc spinning backwards and forwards several times before winding up. Still no laser , "err" then 6 - dashes
Martin
It says that the master clock and re clocking unit are under the copper shield.
What does that mean ?
What can you see ?
It says that the master clock and re clocking unit are under the copper shield.
What does that mean ?
What can you see ?
I cannot see an obvios copper shield, I assumed that the clocking unit was under the DAC board and above the masterboard as there's nowhere else for it to live. The DAC board appears to be screwed to the master board and is fairly solid-Martin.
The big copper thing on the back plate....can you access what's inside ?
It's got to be a connection issue to do with with clocking or.....a laser issue.
I may have another spare one here ( that works ) if necessary but you'll need to be brave and do a few simple things to fit.
It'll be worth it looking at the player ' as is ' 🙂
It's got to be a connection issue to do with with clocking or.....a laser issue.
I may have another spare one here ( that works ) if necessary but you'll need to be brave and do a few simple things to fit.
It'll be worth it looking at the player ' as is ' 🙂
There are new masterclock board and
recloking unit under copper shielding cover. Do not be surprized that everything is assembled in the DAC board - sure,
this is longer to do, but as shorter wires as lower jitter and better sound."
This is what it says in the auction details ! ??
Wonder what it means then ?
recloking unit under copper shielding cover. Do not be surprized that everything is assembled in the DAC board - sure,
this is longer to do, but as shorter wires as lower jitter and better sound."
This is what it says in the auction details ! ??
Wonder what it means then ?
Martin - I'm sorry but I'm maxed out now.
I'm hoping that someone is on the fence in the background and they can step in and contribute something more meaningful.
I have a transport here, spare for the A5 which may sort out the problem if it's the laser. You can send me a private message if you want it.
Don't give up on it - it looks ( and the description reads ) like one of the best A5's I've seen or heard of so it'll be well worth it eventually.
Andrew
I'm hoping that someone is on the fence in the background and they can step in and contribute something more meaningful.
I have a transport here, spare for the A5 which may sort out the problem if it's the laser. You can send me a private message if you want it.
Don't give up on it - it looks ( and the description reads ) like one of the best A5's I've seen or heard of so it'll be well worth it eventually.
Andrew
C'mon guys - help this man out.
He's got a belter here that's had a knock on it's way from France.
He's got a belter here that's had a knock on it's way from France.
96 views already and not one technically educated contribution.......?
You've all seen my effort - it's clearly not enough - C'MON fella's - give him a steer please.
If I send him another ' good ' transport and it's not a fix what else can he check ?
Andrew
You've all seen my effort - it's clearly not enough - C'MON fella's - give him a steer please.
If I send him another ' good ' transport and it's not a fix what else can he check ?
Andrew
Phew, lots of posts for such a new thread.
It sounds like your player is suffering from a loss of clock problem. The player's decoder, a SAA7310, controls the spindle speed based on the master clock and the remaining capacity of its frame buffer. If the SAA7310 isn't fed a clock, the spindle motor control system won't work, and the spindle motor will run at maximum speed. Loading a CD into a player with a spindle motor running at maximum speed doesn't sound nice, as you now well know!
Obviously it's very likely that the loss of clock fault is related to the fact that your player is using an aftermarket master clock. There's a couple of likely reasons for the master clock not working:
- The wiring carrying power to the clock has failed.
- The wiring carrying the clock signal from the master clock to the player has failed.
There is also the possibility that something has actually broken, but presumably the player worked before it was sent, so it's best to check for the above two first. You will probably need to disassemble the player somewhat, so read up on ESD precautions. If you don't know what to look for, expose the master clock, take photos and post them here.
Good luck with your player.
It sounds like your player is suffering from a loss of clock problem. The player's decoder, a SAA7310, controls the spindle speed based on the master clock and the remaining capacity of its frame buffer. If the SAA7310 isn't fed a clock, the spindle motor control system won't work, and the spindle motor will run at maximum speed. Loading a CD into a player with a spindle motor running at maximum speed doesn't sound nice, as you now well know!
Obviously it's very likely that the loss of clock fault is related to the fact that your player is using an aftermarket master clock. There's a couple of likely reasons for the master clock not working:
- The wiring carrying power to the clock has failed.
- The wiring carrying the clock signal from the master clock to the player has failed.
There is also the possibility that something has actually broken, but presumably the player worked before it was sent, so it's best to check for the above two first. You will probably need to disassemble the player somewhat, so read up on ESD precautions. If you don't know what to look for, expose the master clock, take photos and post them here.
Good luck with your player.
Unfortunately its not that easy...
amc184's suggestions are spot on as what needs to be done.
Also the player has been modified !... yes... so in a way "all bets are off" as literally anything could be wrong... this isn't a "normal" failure mode. Something has happened to it so the only way to fix this is to be methodical.
Shock (dropping etc) often causes damage around heavy PCB mounted components (transformer etc) causing fractured print etc.
Fault finding consists of checking ALL PSU rails are correct, also check them with a 'scope as you would be surprised just what that shows. Make sure they all reach their destinations correctly.
Make sure all clock signals are present, correct amplitude, correct frequency.
Hi AMC and Mooly
We were posting in real time - it would have been easier speaking to him on the phone🙂
Thanks for stepping in - your suggestions are just what was needed.
I can talk him through stripping / re building it but will he spot a lifted pad ?
Loose wire... maybe.
I feel very sorry for him and he's just shipped £200 + on this😱
Andrew
We were posting in real time - it would have been easier speaking to him on the phone🙂
Thanks for stepping in - your suggestions are just what was needed.
I can talk him through stripping / re building it but will he spot a lifted pad ?
Loose wire... maybe.
I feel very sorry for him and he's just shipped £200 + on this😱
Andrew
I posted this in the other Arcam thread;
Not sure what is the real cause and the clock is a plausible explanation too....yet the cause may be simpler and mechanical;
tiefbassuebertr may be the member that might be able to help you out as from what I've seen he has a wealth of info on laser pickups.
Looking at the various pics of the Arcam I notice that it is a front loader using a disc clamp. On my own CD player I removed the clamping crap and use three tiny (and I mean tiny) blobs of blu-tak to keep the disc stuck onto the spindle while the opening and closing mechanism (tray) still is functioning (working that way since 1990).
You could try this whilst keeping the clamping mechanism open with a pen or something like that to see if the disc is then being read or it is the laser unit itself that may be at fault(laser burn out or the logic driving the system). If the disc is not spinning correctly the laser pickup can not read the data, an error message is the result, I get that a lot when the Blu-tak is picking up more dust and needs to be replaced.
Not sure what is the real cause and the clock is a plausible explanation too....yet the cause may be simpler and mechanical;
tiefbassuebertr may be the member that might be able to help you out as from what I've seen he has a wealth of info on laser pickups.
Looking at the various pics of the Arcam I notice that it is a front loader using a disc clamp. On my own CD player I removed the clamping crap and use three tiny (and I mean tiny) blobs of blu-tak to keep the disc stuck onto the spindle while the opening and closing mechanism (tray) still is functioning (working that way since 1990).
You could try this whilst keeping the clamping mechanism open with a pen or something like that to see if the disc is then being read or it is the laser unit itself that may be at fault(laser burn out or the logic driving the system). If the disc is not spinning correctly the laser pickup can not read the data, an error message is the result, I get that a lot when the Blu-tak is picking up more dust and needs to be replaced.
Marcel - I think the disc is spinning the wrong way round so your blue tac suggestion will not make it read the disc.
It's clock and power supply related - as per the suggestions previous.
It's time for Martin to roll up his sleeves and take a deep breath for a lesson in stripping down a CD Player.😉
It's good fun - don't groan.
I'll e mail you on this - the other members don't want to see a blow by blow account of the mess we're about to make 😱😀
Andrew
It's clock and power supply related - as per the suggestions previous.
It's time for Martin to roll up his sleeves and take a deep breath for a lesson in stripping down a CD Player.😉
It's good fun - don't groan.
I'll e mail you on this - the other members don't want to see a blow by blow account of the mess we're about to make 😱😀
Andrew
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