Marantz 2325 restore
- Thread starter catttman
- Start date
catrafter
Marantz Specialist
I always replace the TO-220 voltage regulator transistors with On Semi MJE15030, replace the 5 Watt resistor with a new part, leaving the leads long so that it is 'high and in the clear' to keep heat away from the other components.
I always replace the protection relay, too.
Tom
I always replace the protection relay, too.
Tom
Attachments
Do some study here on AK/Marantz. There are many rebuild threads and discussions on what caps to use and known crummy parts. Individual boards often fit multiple models so look at threads on other models too. Some excellent suggestions were posted by a couple of great techs already in this thread! One thing you may find is that the kit you found has some good parts in it and some not so good parts in it. Best wishes and don't be afraid to ask specific questions as you go along! :yes:
I keep bumping in to these receivers did not work at all until super cleaned the controls and amp connectors mickey moused the switch till the replacement arrives
I Ordered almost all the parts // I found 5 different lists to go off of lol
this must be the most popular receiver lots of info and I printed all I could find and BIG V,s too nice job there! going to copy his job ... I like it
I have one little problem with the tuner ... it works just fine but every once in a while the fm radio cuts off like the antenna wire was removed for a second or a minute or so then back on? I looked for lose grounds got me may be after the rebuild it will stop
looks like a easy one to take apart too
thanks ..... any advise on the radio cutting off - on? for a sec.
FIXED
I Ordered almost all the parts // I found 5 different lists to go off of lol
this must be the most popular receiver lots of info and I printed all I could find and BIG V,s too nice job there! going to copy his job ... I like it
I have one little problem with the tuner ... it works just fine but every once in a while the fm radio cuts off like the antenna wire was removed for a second or a minute or so then back on? I looked for lose grounds got me may be after the rebuild it will stop
looks like a easy one to take apart too
thanks ..... any advise on the radio cutting off - on? for a sec.
FIXED
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FM and AM both looks like there are both getting low power
the FM STEREO light starts out very dim has it warms up starts getting a little brighter and sometimes now the radio will kick on full meter and play correctly
I Need to know on the power supply board which pins feed the radio
what should they be the radio act like its under powered
I think it has 2 feeds? IF and front end like the 4230 has
thanks
I used the mur1620 to-220 packages on my power supply board, the 131B being common cathode IIRC also, same pinouts. I just like the MUR' cause they have a common anode on as well. These use the Omron LY-02 variant as well.
heres a link to a 2325 I just did. Have fun their great units to work on, really come apart easily.
BTW is the whole tuning functioning when it does that, or just FM or AM?
Both AM-FM are getting very low to almost no signal , just like they are getting low voltage not powered up all the way
after a while when warmed both start to pop on then ok
if I turn the radio off let her cool then at back to start no signal till she warms up ... Power supply must be it ?
any ideas
I going to measure all the pins and report back
thank you
KutzlerTrans
Jennie & I with Buddy and Barney.
Pins 804 and 805 should give you 35vdc. The white round r809 is the adjustment pod.
You may be dealing with the Muting feature. You shouldn't have to adjust the pods unless they were adjusted before you. check your muting adjustment on the back side .
You may be dealing with the Muting feature. You shouldn't have to adjust the pods unless they were adjusted before you. check your muting adjustment on the back side .
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OK I THINK I HAVE SOME THING
HERE IT IS at cold J-807 = 3v let it warm up @ 10 min. 13v
J- 805 = 35v
J-806= 19v
J- 807 = 3v cold them ramps up slowly to @13v
*So which component feeds J-807 ?*
the power supply does need done one large cap is growing out of it cover on the P800 board
Thank up I think I see the light *J=807*
THANKS !!!!
HERE IT IS at cold J-807 = 3v let it warm up @ 10 min. 13v
J- 805 = 35v
J-806= 19v
J- 807 = 3v cold them ramps up slowly to @13v
*So which component feeds J-807 ?*
the power supply does need done one large cap is growing out of it cover on the P800 board
Thank up I think I see the light *J=807*
THANKS !!!!
KutzlerTrans
Jennie & I with Buddy and Barney.
the power supply does need done one large cap is growing out of it cover on the P800 board.
That doesn't sound good. Did you recap this board.??? Cap orientation comes to mind. If you have it in backwards, it' could pop in your face.
j807 goes to your mode switch.
What kind of voltages are you getting on E/B/C of H801?
That doesn't sound good. Did you recap this board.??? Cap orientation comes to mind. If you have it in backwards, it' could pop in your face.
j807 goes to your mode switch.
What kind of voltages are you getting on E/B/C of H801?
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I am currently working on my 2325. It's still in the work. Pin J807 will give 14v. That powers the tuner. If it fluctuates, H801 may be faulty. If you are using original 2SD331, those are a bit small. Catrafter recommends replacing it with MJE15030 or currently with a Suffix "G" (MJE15030G). I use the same transistor as Cat recommends in my current 2325 project. I also had the same issue in a couple of my Pioneers.
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KutzlerTrans
Jennie & I with Buddy and Barney.
Digital Docs has a schematic on your unit. Without it, you will be lost.
As we all know, fixing the known wrongs like that cap, is the first place to start.
When you get that fixed, let us know if it works
As we all know, fixing the known wrongs like that cap, is the first place to start.
When you get that fixed, let us know if it works
catrafter
Marantz Specialist
I used the mur1620 to-220 packages on my power supply board, the 131B being common cathode IIRC also, same pinouts. I just like the MUR' cause they have a common anode on as well. These use the Omron LY-02 variant as well.
heres a link to a 2325 I just did. Have fun their great units to work on, really come apart easily.
BTW is the whole tuning functioning when it does that, or just FM or AM?
To avoid any confusion, those MUR devices are rectifiers. The voltage regulator transistors are the ones on the black heat sink.
Tom
thanks all items ordered
863-MJE15030G
Mfr. #: MJE15030G
Desc.: Transistors Bipolar - BJT8A 150V
863-MUR1620CTRG
Mfr. #: MUR1620CTRG
Desc.: Rectifiers200V 16A UltraFast
and more!!!
thanks all
KutzlerTrans
Jennie & I with Buddy and Barney.
:thmbsp:
