BUZZING PROBLEM WITH TURNTABLE-Please Help!

[FSHZ:42]

Almost forgot to mention that the pre-amp is a Parasound P/PH-100 Phono Preamplifier!

[duderduderini]

That large ground wire.. did you add that before the buzz (ie is that something you added along with the new phono cable)?
Looking at the colours of the tonearm wires you have (starting from Left) green red blue white.. looking at the Phono cable the black from the phono cable goes to green on the tonearm cable, the red goes to red, the green on the phono goes to blue on the tonearm and white goes to white... Is this how it was wired originally?
can you with a multimeter find out where the small tonearm wires go?
Or can you verify where they go on the cartridge?
The other thing.. Can you make the exposed coloured leads shorter where they are soldered to the board so that there is more of the sheilded section(the thick black sheath) right up to the board?
Have you checked your soldering for small dags connecting the other tracks?
Keep me posted
Good Luck

[Salas]

Originally posted by FSHZ:42



The interconnect cables that are attached to the Turntable are dual channel twisted audio EFX DOUBLE SHIELDED interconnects manufactured by SCOSCHE.

Where is the shield attached? I don't see the shield soldered somewhere. I don't see it at all as a matter of fact.

[analog_sa]

Originally posted by FSHZ:42


Also, I noticed that when the power button is off, my cartridge still picks up my finger as I gentley rub it.

This is very normal. Most turntables do not mute the catridge when powered off.


I find it very stange that there are AC carrying wires so close to the unshielded terminations of the tonearm wires. Surely this is a way for hum to get in.

[Original Burnedfingers]

I dont remember hearing this buzzing prior to changing the stock rca cables

Well then there must be something different or you left off a jumper from the chassis to the ground from your cartridge.

Take your VOM meter and find the hot terminal on each old RCA cable and jot down the color. Disconnect the new cables and do the same with them and check to see that color for color there is a match up. Sometimes cable manufactures will use different color combinations and therefore the colors don't match between the new cables and the old. You will need to see if the "HOT" on each cable makes connection to the "HOT" for each channel on the cartridge. Find the ground for each channel tie them together and make sure they ground to the chassis.

Do NOT lift the AC power ground as this is a safety matter and must be observed. Note* If it was quiet before with the AC connected as it is there is NO need to screw with it.

[FSHZ:42]

O.K. I found out that the left channel was on the right side of turntable solder board. both grounds were soldered correct. Could this have been making the buzzing sound? I went ahead and desoldered the EFX interconnect cable and replaced it with the oem cable. It appears that the buzzing is going. I did notice that when the volume is turned up like around 3/4 way & up, you can hear a hissing sound. Any suggestions as to maybe getting another good interconnect cable?

[FSHZ:42]

I was also wondering if any of you guys, by looking at the components on this Denon turntable, would be able to recommend any type of upgrade like replacing any of the caps, resistors, or what not, that would improve its sound! Also, take a look at my phono pre-amp and let me know if this also can be upraded. I noticed on the power plug jack, that the earth ground isn't connected to anything. Is this O.K.? Thanks again everyone for your help! Here are 2 photos of the pre-amp:

http://i173.photobucket.com/albums/w...aSoundpic4.jpg

http://i173.photobucket.com/albums/w...aSoundpic2.jpg

[Original Burnedfingers]

It appears that the buzzing is going

Do you mean the buzzing is gone?

I did notice that when the volume is turned up like around 3/4 way & up, you can hear a hissing sound.

There is a lot of gain in a phono stage. The hissing is normal when the gain is turned up 3/4 of the way.

[duderduderini]

Without patronising you at all, perhaps upgrading the turntable/ phono section may be in order. I dont know what other members think but will read with interest. If you have a budget to upgrade it might be better spent. Modifying stuff that works as in the phono preamp may well result in degradation of sound or it may stop working all together. Those op amps are soldered to the board for instance and may be difficult to get out if you are not experienced.. I dont like metal film resistors etc etc but perhaps leaving it alone and upgrading to a tubebox se or some such device by "project" may make you happy.
Nick

[duderduderini]

Without patronising you at all, perhaps upgrading the turntable/ phono section may be in order. I dont know what other members think but will read with interest. If you have a budget to upgrade it might be better spent. Modifying stuff that works as in the phono preamp may well result in degradation of sound or it may stop working all together. Those op amps are soldered to the board for instance and may be difficult to get out if you are not experienced.. I dont like metal film resistors etc etc but perhaps leaving it alone and upgrading to a tubebox se or some such device by "project" may make you happy.
Nick