Marantz PM8003 service manual

lumanauw · 6th July 2010, 10:17 AM

Where can I get service manual for Marantz PM8003?

sakis · 6th July 2010, 10:22 AM

i have 8000 if this is any help to you .... but also know my ways arround those is there a chance that i can give you my help ????

( some times ago i solved a weird problem on those with succes )

kind regards sakis

lumanauw · 6th July 2010, 01:40 PM

Thanks, but I've already got that one. Seems different at first sight.

sakis · 6th July 2010, 01:56 PM

state the type of your problem if you like

lumanauw · 7th July 2010, 02:15 AM

A friend of mine brings me his PM8003. The sound is somehow "not involving". Something is missing. I want to look at the the circuit first. Maybe the bandiwth of the filters or something else can be changed.

sakis · 7th July 2010, 07:04 AM

ok ...got the picture ...

what i would do ...

---- first listen and take scope readings from the machine as is
---- then a good spot to actually isolate everything from everything is the volume pot pcb
***there you have the signal from selector switch
*** from there its rerooted to the tone control
*** and exactly behind the tone control is a pcb that features volume buffer and auxiliary psu ... ( from there we go to the main amplifier ) ( nice place to look at )

faults i found in several of these amps

---thermal stress arround LTP courent source area /main amplifier /poor soldering
---genarally soldering isues in the main amplifier area
--- tone contols pots and source direct switch get dirty very easy
--- main procesor reset ic fails easily
--- selector area eventhough relay operated has terrible cross talk

this is it more or less ...kind regards sakis

6th July 2010, 10:17 AM	#1
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Marantz PM8003 service manual Where can I get service manual for Marantz PM8003?

6th July 2010, 10:22 AM	#2
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	i have 8000 if this is any help to you .... but also know my ways arround those is there a chance that i can give you my help ???? ( some times ago i solved a weird problem on those with succes ) kind regards sakis __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

6th July 2010, 01:56 PM	#4
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	state the type of your problem if you like __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

7th July 2010, 07:04 AM	#6
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	ok ...got the picture ... what i would do ... ---- first listen and take scope readings from the machine as is ---- then a good spot to actually isolate everything from everything is the volume pot pcb *there you have the signal from selector switch * from there its rerooted to the tone control *** and exactly behind the tone control is a pcb that features volume buffer and auxiliary psu ... ( from there we go to the main amplifier ) ( nice place to look at ) faults i found in several of these amps ---thermal stress arround LTP courent source area /main amplifier /poor soldering ---genarally soldering isues in the main amplifier area --- tone contols pots and source direct switch get dirty very easy --- main procesor reset ic fails easily --- selector area eventhough relay operated has terrible cross talk this is it more or less ...kind regards sakis __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

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6th July 2010, 01:40 PM	#3
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Thanks, but I've already got that one. Seems different at first sight.

7th July 2010, 02:15 AM	#5
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	A friend of mine brings me his PM8003. The sound is somehow "not involving". Something is missing. I want to look at the the circuit first. Maybe the bandiwth of the filters or something else can be changed.

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