Err, think most have done similar.Quote:
Originally Posted by symon
Printable View
Err, think most have done similar.Quote:
Originally Posted by symon
Not a very helpful suggestion right now, but some 5 pin Din to phono leads and 4 pin Din to phono may be useful in testing out the Quad stuff.
If your CD has a volume control you could connect it straight to the 405 to check the power amp.
Once the power amp has been confirmed as OK, perhaps connect the 33 to it using the 4 pin Din to 4 Pin Din lead. (it is possible that you have a faulty one of these cables).
Hmm, I was wondering about the cables.
I don't think you can connect direct to the 405, without going through a pre-amp.
I'm not sure I have the ability to connect my Denon to the 405, with the Denon acting as a pre-amp.
At the moment, I only have one set of connectors.
Yes, you can connect 405 straight to a CD, no pre needed, but a volume control is. You will need leads though.Quote:
Originally Posted by symon
I have run my 405-2 straight off a CD player, off PC sound card etc. etc.
You can test out that 4 pin din to 4 pin din lead with torch bulb and battery if you do not have a meter.
Quote:
Originally Posted by spendorman
How?:confused:
Connect one end of bulb to battery with a bit of wire, other end of battery to another wire so you have a free end.
Other end of bulb connect another wire, so you have another free end.
When both free ends are touched together, bulb lights, this gives you a continuity tester.
Check out from pin 1 of one end of Din lead to pin 1 of other end of din lead and so on.
Just looked at a cable that I use to connect 405-2 and 303 amps. Pin 4 is not used, pin 2 is earth pin 3 signal, pin 1 signal.
Pin 1 is connected to Pin 1 (at other end of lead)
Pin 2 is conn to Pin 2
Pin 3 is conn to Pin 3
Ok - cool, will try that.
Here's a photo of the back of the 405:
http://farm4.static.flickr.com/3548/...5ab40a3e_m.jpg
Looks like a 405 to me, but what are those two things to the left of the Din socket? Phonos? If so, not original, photo is a bit small to see clearly.
Bigger photo:
http://farm4.static.flickr.com/3548/...5ab40a3e_b.jpg
Don't know what the white things are and I don't know how to get them out. Although, I suppose taking the case off might give me the answer.
Look like pots (volume controls) definately non standard, but understandable
Wait - volume controls? Hmmm, let's see....
Most people put phono sockets in those two holes that are normally filled with grommets. Here is my 405-2 (was 405). I put the phono sockets in. Also note the 4 mm loudspeaker sockets, part of the 405-2 conversion.
Yes, they are volume controls... but they are not the answer.
It may be worth opening the 405 to see how they are connected, perhaps take photo, you can also check to see if power limiters are in.
Just two pozi screws to open.
Pictures: Inside 1
http://farm4.static.flickr.com/3600/...e138d873_b.jpg
To be honest - I opened it up, looked in and thought 'Nope, no idea what this all means' :scratch::confused::lol:
Cant really see the wiring for the added pots, but let us assume that they work. Were they turned right up, down or in the middle? Obviously right down, one would probably not hear much from the amp.
Cant quite see if power limiter resistors are in they would be in two holes in each channel, marked R11 between the holes. This resistor just pushes into the two holes.
This is a 405 board, probably a later production than yours. The limiter resistor is indicated in the circle. They just push in. Nothing in the holes gives full 100W/ channel.
Nope - two holes unoccupied, so the limiters aren't in. And, I don't have them.
The extra pots are turned up full. They do have an effect, but nothing special at the moment. They just make a quiet sound slightly less quiet.
I can't see how I would connect anything other than the 33 to the 405. I'm assuming this is beause of the extra volume pots.
The resistors are just standard resistors, forget the value, one can tell from the colour codes (I forget the codes!) will probably be in the Quad instructions though.
So unless anyone has any other ideas, check out the 4 pin to 4 pin Din lead. Make or get a cable to connect 405 direct to CD.
R11 is power limiter resistor 1.8 K Ohm two needed of course.
Just seen a test on the 405, they got approx 120W per channel into 8 Ohms, so be a bit careful, don't know your speakers, may be OK with that.
I'm thinking of taking a rest for a bit - headache, no spare torch lightbulbs!
OK, If you were nearer, I would sort it.
You would need 4 pin din to phono cable.Quote:
Originally Posted by symon
Ah, ok.
The CD player I'm currently using doesn't have a volume control. But, I have another in the loft which does (I think).
Thanks for your kind offer of help, and for all you have done so far.
I might get this:
http://cgi.ebay.co.uk/2-PHONO-SOCKET...1%7C240%3A1318
I'm thinking I could use that for a CD player straight in to the 405, and also to link the pre out on my Denon to the 405.
Yes, this should be useful, I have bought from that seller myself.Quote:
Originally Posted by symon
Some similar but 5 pin din to phono may be useful for the inputs.
You could also go from a personal stereo (ipod etc) to the 405.
Yes - I might get one of those later. I have a decent tt which needs fixing (lord help me!) which I might need one of those for.
I'm just going to dig out my other cdp to see if that is the source of the problem. I doubt it will be, but it's a test I can do now.
I use these for my inputs into the 33. They're Philips, though are not in branded packaging. Very nicely made for the price.
http://cgi.ebay.co.uk/NAIM-QUAD-5-PI...1%7C240%3A1318
Nope, a change of cdp changes nothing.
Nick, which input in the back of the 33 do you use? Tape or radio?
I'm defintiely confused. I just connected the cdp to the radio 1 input. With the stero button in the sound is weak. With the two mono buttons in the sound is strong and full, but in mono obviously, with particular bits of the music buried. So, it's not as I want it, but it's pointing in the right direction. It would seem to me from this that the stereo function is off in some way.
Also, when I put the lead in the radio 2 button and pressed the stereo and mono buttons in a random way (I was getting confused) the Quad light came on. But, I got very little sound and when I pressed more buttons, the Quad light went off.
So the Quad light works, but only when a mysterious sequence of buttons are pressed.
Sound comes out loud and strong, but not when the tape input is used, or when teh stereo button is pressed in.
Does this shed any further light on anything??
Try radio 2 instead. I have a dim and distant memory about this.....
I may have got my wotsits in a doodah, but I seem to remember that the radio 1 input was setup for the pin 1 mono output of the AM tuner Quad did...
I think it might be the other way around. The manual suggests 1 is for stereo and 2 is for AM. I did try it in the Radio 2 input and got very little if no noise (but the light came on!) I'll try again though.
I bet the Quad lamp is loose, pushing buttons just shook it a little making contact. Take cover off 33 and check bulb is screwed in fully.
As for the other 33 problems, a bit of a mystery. CD should work into Tape replay and Tuner input, but tuner input may be too high a sensitivity, think it was particularly sensitive for the FM3 which had little output, possibly about 100mV?
No output from the other radio input at all, unless it's very very quiet.
I thought about that. It's a very tight squeeze to get to it though. I don't feel confident enough to move other bits just to get the light working. But I will dive in again and try.Quote:
Originally Posted by spendorman
I am beginning to wonder if something else is loose inside. I might open it up again and push a few things just to make sure everything is in place.
Has the 33 been out of use for a long period?
I don't think so. It's been sat on my floor for a month or so. I'll have to check about what was use it had before that.
Only thinking that the selector switch contacts may have corroded, but its not that likely. My 33 was in a loft for about 8 years and was still OK.
Have a look at the pliug in boards inside the 33, carefully take out and look at the contact area. Don't use any abrasive to clean them though. Put boards back in and try again.
Just been looking at the service supplement for the 33, it does say that the sockets for the internal plug in boards
"have been known to cause confusing symptoms of erratic operation, attributed to other factors such as pushbutton switches, solder joints etc."
There is a cure, I can scan this in if required. Think it would be worth tying what I said before, removing boards checking and putting back in, before doing anything else.
Hmmm - took out the removable cards inside. They all look fine to me. The connections look clean enough. No change. Using the Radio 1 input, tiny sound on the stereo button, fuller sound on the Mono buttons.
Would photographs of all the removable cards help?
I will scan in the part of the service supplement about the contacts