|Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|17th February 2004, 09:08 AM||#1|
Join Date: Feb 2004
OP-AMPS in Marantz PM7000 Amplifier
My name is Olek, I'm from Poland, and sorry for my english.
I have very important for me question/request about Integrated Amplifier Marantz PM7000 (or PM8000). I have PM7000 (and Marantz CD6000-after upgrade) and I want to change op-amps (Operational Amplifiers) inside to better ones. But I don't know which is responsible for what audio module/unit/signal_patch (I don't have any electronics and elements scheme or chart). I can see on the little plate inside (near the volume potentiometer/regulator) four op-amps (I think all are dual, for L and R channel):
1. 7501 - NJM2068DD (7501, 7502, 7503 are on the parallel board/plate to basis-ground)
2. 7502 - NJM2068DD
3. 7503 - .................. ?
4. .... ? - NJM2114D (it is only one op-amp on board/plate with the volume potentiometer/regulator, board parpendicular to basis-ground)
Which is to tone control in bas ?
Which is to tone control in treble ?
Which is to volume control ?
What for is the fourth op-amp ?
Maybe I'm wrong and their destiny and using is even different ?
Maybe photos with these op-amps will be helpfull: http://garmin.webpark.pl/pm8000.htm
(pictures nr: 7 - there are 3 op-amps, and 8 - there are 1 op-amp)
I listen only in Direct mode/patch (tone control and balance are disabled). Which is the most important to change for me ?
I want to change e.g to: OPA2604 or AD825.
I will be very grateful, much obliged and appreciate.
Thank you very much.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Marantz PM7000 problem /schematic||Juko||Solid State||3||7th December 2014 02:22 PM|
|Schematic for PM7000/7200/8000||santaz||Solid State||0||6th December 2004 08:57 PM|
|OP-AMPS in Marantz PM7000 Amplifier||Alex2||Digital Source||2||18th February 2004 11:14 AM|
|OP-AMPS in Marantz PM7000 Amplifier||Alex2||Chip Amps||0||17th February 2004 09:17 AM|
|Schematic for Marantz PM7000||johnny1||Solid State||0||31st May 2003 11:47 PM|
|New To Site?||Need Help?|