I have a strange problem, if any of you nice people would like to help.
I have modded a mate's cd67, Superclock 4 & power supply + invisus + a couple of 5v regs for digital and a load of bg's. It sounds awesome, but:
The laser keeps bobbing up and down when the player is in stop mode, it sounds like a vibration and if I put my finger on the lens, it stops. It takes longer than my player to read the toc and change tracks, but other than that it plays perfectly.
Help anyone?
Lee.
I have modded a mate's cd67, Superclock 4 & power supply + invisus + a couple of 5v regs for digital and a load of bg's. It sounds awesome, but:
The laser keeps bobbing up and down when the player is in stop mode, it sounds like a vibration and if I put my finger on the lens, it stops. It takes longer than my player to read the toc and change tracks, but other than that it plays perfectly.
Help anyone?
Lee.
rowemeister said:
Cheers Brent. I've checked all voltages and nothing seems to be bad. I checked all the reg outputs with an analogue multimeter and the needle is rock-solid. The problem only seems to occur when the player has been switched on for an hour or so.
The tx feeding the dig and analog rails gets mighty hot, I think it's overloaded, so I've connected both windings for double the va, and used the spare winding off the clock tx for the dig regs. The tx is not as hot now. Could it have been overheating and causing a bad ac output? It's running now, so I'll let you know my findings.
Lee.
rowemeister said:
Bingo.
Whichever tx I connect the 7805's to it gets really hot. Too hot to touch! I've checked the regs and everything seems fine. They're both giving 5.05v.
Does the SuperClock4 need a large tx? The power supply is 4x11dq09, 10,000uF 40v BC, lm317 with zener's, 3300uF 16v on 11.75v output.
The tx feeding the clock is warm but seems perfectly ok.
Lee
It sounds like one of the windings is grounded. So check the diodes on the psu and make sure the ac in is not to gnd on one side of the winding.
This scenario will give you V out and cook the tx.
The bigger the tx the better, moving from 3.2VA to 7VA (Audiocom PSU for clock 4) made a nice little improvement
Brent
This scenario will give you V out and cook the tx.
The bigger the tx the better, moving from 3.2VA to 7VA (Audiocom PSU for clock 4) made a nice little improvement
Brent
Hi Ray6h5c said:
I am tempted to replace C120 and C122 with 2200uF 6.3v Rubycon MCZ bypassed with 3u3Tant + 4700pF Polystyrene.
Will I damage anything ?
I did the same mod in other +5v inputs, around DAC and Decoder and got a lot of definition.
I really would apreciate your comment.
Regards
Hi Ray
That's not the problem unfortunately.
The file downloads correctly named, saves with the correct extension, opens correctly in Photoshop, but there is no image in the window that opens?!?!? just a blank image area.
Yet the CD outputstage eps image is fine.
Strange
Jim
PS I'm using Firefox.
That's not the problem unfortunately.
The file downloads correctly named, saves with the correct extension, opens correctly in Photoshop, but there is no image in the window that opens?!?!? just a blank image area.
Yet the CD outputstage eps image is fine.
Strange
Jim
PS I'm using Firefox.
6h5c said:
Nah, I don't think you'll damage anything. Just give it a try and see how it sounds, if you don't like it you can always take it out
Ray
Hi
Can you elucidate me on the real function of the Servo Chip, so I can understand the way this mod can affect the sound ?
As I am mainly following your instructions regarding the mods, sometimes I do not understand why these must be done.
Note:
I am aware of the basic function of the components, I am familiar with valve amp design and construction but am new to the digital technologies.
Thank you for your comments.
Regards