ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Dear all,
I have an old BeoMaster 1500 center (receiver) which is working fairly well.
I'm trying to connect it to a Garrad record player which has RCA phono output.
To do this, I purchased a RCA-to-DIN cable (5 pin) and connected it to Beogram "phono input".
the result is that I get no sound.
do you think this is a fault with the beogram or am I missing something?
Does it have an internal phono-stage?
PS
Should mention that "FM RADIO" from Beogram 1500 plays well, so it is an issue with phono input only.
Thanks,
Ittai
Hi,
Welcome to Beoworld !
Most likely is that the adapter uses the wrong pins in the DIN plug.The 5-pin DIN has four signal pins and a ground. Two are left/right playback, the other two are left/right record.The tape socket uses all four.The phono socket only the playback pins (since it cannot record).If your adapter connects to the record pins (making the adapter a DIN-to-RCA rather than a RCA-to-DIN), youwill effectively be connecting one output to another output and the result is silence.
Martin
Thanks.
So how do I know which pins are the live ones for PHONO input?
Knowing that - I can rewire the cable.
If it works - I'll purchase a dedicated the correct cable. How should it be called then?
Is the name "RCA to DIN phono" ?
The Phono input should be using pins 3 and 5 (and the center pin 2 is ground).If your adapter connects to pins 1 and 4, you will have to move those two leads to pins 3 and 5.
Ideally, the adapter should also provide an external (protective-) grounding lead to fit onto a screw on the Beocenter chassis.
will test and update on forum.
Many thanks.
Martin hi,
Just checking before soldering.
so according to this schematic:
http://www.google.co.il/imgres?imgurl=http://www.hilmanind.com/images/din5m.gif&imgrefurl=http://www.hilmanind.com/pinouts/din5s.htm&h=268&w=290&sz=7&tbnid=SE0KoSj-1GK_cM:&tbnh=90&tbnw=97&zoom=1&usg=__E-irGlqR2LmQTLuuUFVXifPTWko=&docid=oKrGFPDX1G1DBM&sa=X&ei=gTanUa-CD-mQiQePkYCYDQ&ved=0CDcQ9QEwAg&dur=436
Measured on the cable I'm using:
Pin 1 --> RCA right '+' tip
Pin 4--> RCA left '+' tip
Pin 2 --> RCA left and right ground
Pin 3 and 5 --> disconnected
How should I configure it then?
Move the lead from pin 1 to pin 3Move the lead from pin 4 to pin 5
If you get a signal drowned in hum, introduce an external grounding lead frmo the metal chassisof the turntable to the metal chassis of the Beocenter.
Thanks. Still working on this one.
Let me ask a general qurestion regarding the BEOGRAM1500 itself.
It is a ~30 years old unit, do you recommend re capping it or bias adjustments?
I see 2 electrolytic caps on main power supply and one electrolytic cap on amplifier PCB.... Look very old...
Rocko
I suppose you mean Beomaster 1500 ?In that case, yes.
It's very common to see the trimmers lose contact and occasionally fall apart physically, due to aging and/or oxidation.It's also safe to say that most of the electrolytic capacitors will also benefit from replacing.If your Beomaster is still working you may not experience a huge difference but it will be much betterprepared and ready for the next 25-30 years.
Phono input is now operative thanks.
Beomaster sounds great thanks for the "support".
;-)