Hi guys,
I'm looking for schematics for my newly 😀 purchased P/LD-1500. I'll appreciate for any help! (This time Tony couldn't help due to vintage of preamp...)
Regards,
Kabal
I'm looking for schematics for my newly 😀 purchased P/LD-1500. I'll appreciate for any help! (This time Tony couldn't help due to vintage of preamp...)
Regards,
Kabal
Hi, Mr. Curl!
No. I hope it will not happen, but if it happen... I also wanted to use schematics as "Owner's Manual" to see the meaning of direct input and output.
No. I hope it will not happen, but if it happen... I also wanted to use schematics as "Owner's Manual" to see the meaning of direct input and output.
Hi Mr. Curl!
I'm here again with some questions...
This weekend I got time to look inside of my preamp. It's great 🙂 Here we go with questions...
1. Am I right that direct input is being selected via relay and not via chip?
2. Don't you know/remember by chance the type of diodes used in power supply?
3. Do you have any tweak suggestions? OP amps, etc...
Regards,
Kabal_MSU
I'm here again with some questions...
This weekend I got time to look inside of my preamp. It's great 🙂 Here we go with questions...
1. Am I right that direct input is being selected via relay and not via chip?
2. Don't you know/remember by chance the type of diodes used in power supply?
3. Do you have any tweak suggestions? OP amps, etc...
Regards,
Kabal_MSU
Your questions are reasonable, but I do not have the schematic in front of me or on my computer. You should leave the diodes alone, and the op amps. The interconnecting wire is suspect, but that is beyond this website to discuss, and will only lead to big trouble around here. Keep it clean on the inside and enjoy it. That is the best that I can offer.
Hi Mr. Curl!
What are you talking about? 😕 If we're talking about the way the signal from direct input comes to main circuitry, I meant that it goes through small relay from OMRON and not through chip similar to TC9152P in my old P/HP-850.
Regards,
Kabal_MSU
What are you talking about? 😕 If we're talking about the way the signal from direct input comes to main circuitry, I meant that it goes through small relay from OMRON and not through chip similar to TC9152P in my old P/HP-850.
Regards,
Kabal_MSU
Hi Mr. Curl,
sorry for necro-posting 😉, but now I need your advice.
So, just by chance I found out that my preamp runs quite hot - top cover is
about 36 - 40º Celsius. After removing the cover, I can't touch the heatsinks
next 3 - 4 minutes. I also noticed that big white capacitors on the preamp board are a little bit sooty on the side turned to heatsinks.
My question is quite simple: is it OK or not? (Unit is not blocked from above,
room temperature is about 22º Celsius.) If not - I'll appreciate for any helpful
hint! (Should I check the bias?)
Regards,
Kabal_MSU
Seems OK, but you might want to put a thin piece of plastic film between the HS and the caps to keep the local heating to a minimum. Just loosely, not tightly bound.
Hello,
pick up the topic again.
I got a nice preamplifier Parasound P LD 1500, unfortunately it is broken and there are missing components in the power supply. In Germany, no circuit documentation to get, even with Parasound in the US not.
Would be glad if someone could help me, either with a schematic or with an indication of the missing parts.
The pictures show the missing parts.
Parasound P DL 1500.jpg - directupload.net
Parasound P DL 1500 5V Netzteil defekt.jpg - directupload.net
Parasound P DL 1500 Netzteil Fehlteile.jpg - directupload.net
Regards
Robert
pick up the topic again.
I got a nice preamplifier Parasound P LD 1500, unfortunately it is broken and there are missing components in the power supply. In Germany, no circuit documentation to get, even with Parasound in the US not.
Would be glad if someone could help me, either with a schematic or with an indication of the missing parts.
The pictures show the missing parts.
Parasound P DL 1500.jpg - directupload.net
Parasound P DL 1500 5V Netzteil defekt.jpg - directupload.net
Parasound P DL 1500 Netzteil Fehlteile.jpg - directupload.net
Regards
Robert
PLD1500
Hallo !
Habe einen PLD 1500 - könnte die Teile identifizieren - Musste den Preamp auch schon instand setzten - war nicht einfach , da ich den Netztrafo ersetzen musste ! Böse sind auch die vielen Kondensatoren, da hatte ich auch schon etliche die Kurzschluß hatten.
Hallo !
Habe einen PLD 1500 - könnte die Teile identifizieren - Musste den Preamp auch schon instand setzten - war nicht einfach , da ich den Netztrafo ersetzen musste ! Böse sind auch die vielen Kondensatoren, da hatte ich auch schon etliche die Kurzschluß hatten.
Yeah, what he said. The parts may not be missing it might just be an option for further regulation in the power supply and was decided not to use as not needed or too expensive for the unit price point.