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Marantz 1250 Recap/Restore

CohibaJoe

CohibaJoe

AK Subscriber
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Been searching for a 1250 for over a 1yr. Fleebay had one last month (700 clams). My latest CL find....300 clams....Fully working and in Very Nice shape and not much dust in the unit.

Will be putting together a Parts list...

Asking if there are any Service Notes for this one or problem area's?

Dual Main Cap....It's going to need a replacement..A small Dimply is dead center and in time this will leak.

Thread for Main Cap Replacement: http://www.audiokarma.org/forums/showthread.php?t=346114
 

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These are sweet units- only got ya is the double PS cap.

I'll be watching and if you have a cap list you can share once you are done that would be awesome.
 
bktheking said:
These are sweet units- only got ya is the double PS cap.

I'll be watching and if you have a cap list you can share once you are done that would be awesome.
Click to expand...
Will do....Will be getting into this tonight.

I will reach out to KrZ8 on the Double cap replacement thread...Have a few questions.
 
Here's mine.

lb9x.jpg
 
This thread is going to be an important one. My 1250 is sitting and either awaiting for me to have it serviced or make the time to learn past the level I'm at now. Those caps and stability improvements require increased competency yet to develop for me. (Can you say rare.....?) Congrats on your finding this one CohibaJoe.
 
KrZ8 said:
It's a nice piece, I still use it daily with no issues.

Here is the parts order I made back in 2010, I only replaced the electrolytics and the transistors:

https://onedrive.live.com/view.aspx...file,pdf&app=WordPdf&authkey=!AKtTCW6iEIGWyvM
Click to expand...
Thank You....And also for the Expanded Pictures of the Main Cap "dual core" filter capacitor replacement you did.

Going thru this now on the Cap List: Looking for Long Life, High Ripple, Low lmpedance and 105Deg. Silmic II I like to use in Pre/Tone, Phone areas.

NICHICON PW, KL(for Low Leakage and Tantalum), VX(Axial) and ELNA Silmic II
 
So here are the Main Caps that will be used. As stayed...35mm Diameter is Max.

And yes....I did replace the Relay.

OK....Back to the Parts list.
 

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List is Completed. I am not going Cap Crazy with the 1250. I feel the sound is Very Fine with this Marantz...I may Update the Phone/Mic Board later.

I have verified with MY 1250 by looking at the PCB board's and the Service Manual. S/N: 100628

This is what I will be using. As Fleetwood Mac sings: "You can go your own way"

Legend: Cap Location, Original Value, Replacement Value, Part #, Cap Brand:

P400 Phone/Mic Amp
C401 4.7uf 35V Tantalum__4.7uf 50V__647-UKL1H4R7KDDANA__NICHICON KL
C402 4.7uf 35V Tantalum__4.7uf 50V__647-UKL1H4R7KDDANA__NICHICON KL
C411 33uf 10V Tantalum___33uf 10V__647-UKL1V100MDDANA__NICHICON KL
C412 33uf 10V Tantalum___33uf 10V__647-UKL1V100MDDANA__NICHICON KL
C419 1uf 35V Tantalum_____1uf 50V__647-UKL1H010KDDANA__NICHICON KL
C420 1uf 35V Tantalum_____1uf 50V__647-UKL1H010KDDANA__NICHICON KL
C423 4.7uf 35V Tantalum__4.7uf 50V__647-UKL1H4R7KDDANA__NICHICON KL
C424 4.7uf 35V Tantalum__4.7uf 50V__647-UKL1H4R7KDDANA__NICHICON KL
C425 10uf 50V___________10uf 50V__555-RFS50V100MG3#5__ELNA SILMIC II
C426 10uf 50V___________10uf 50V__555-RFS50V100MG3#5__ELNA SILMIC II
C427 47uf 63V___________47uf 63V__63V__647-UFG1J470MPM__Nichicon FG
C428 47uf 63V___________47uf 63V__63V__647-UFG1J470MPM__Nichicon FG

PE00 Pre/Tone Amp
CE01 2.2uf 35V Tantalum__2.2uf 50V__647-UKL1H2R2KDDANA__NICHICON KL
CE02 2.2uf 35V Tantalum__2.2uf 50V__647-UKL1H2R2KDDANA__NICHICON KL
CE07 33uf 10V Tantalum___33uf 10V__647-UKL1V100MDDANA__NICHICON KL
CE08 33uf 10V Tantalum___33uf 10V__647-UKL1V100MDDANA__NICHICON KL
CE13 4.7uf 35V Tantalum__4.7uf 50V__647-UKL1H4R7KDDANA__NICHICON KL
CE14 4.7uf 35V Tantalum__4.7uf 50V__647-UKL1H4R7KDDANA__NICHICON KL
CE15 2.2uf 35V Tantalum__2.2uf 50V__647-UKL1H2R2KDDANA__NICHICON KL
CE16 2.2uf 35V Tantalum__2.2uf 50V__647-UKL1H2R2KDDANA__NICHICON KL
CE21 33uf 10V Tantalum___33uf 10V__647-UKL1V100MDDANA__NICHICON KL
CE22 33uf 10V Tantalum___33uf 10V__647-UKL1V100MDDANA__NICHICON KL
CE27 4.7uf 35V Tantalum__4.7uf 50V__647-UKL1H4R7KDDANA__NICHICON KL
CE28 4.7uf 35V Tantalum__4.7uf 50V__647-UKL1H4R7KDDANA__NICHICON KL
CE31 100uf 3V Tantalum__100uf 10V__647-UKL1A101KEDANA___NICHICON KL
CE32 100uf 3V Tantalum__100uf 10V__647-UKL1A101KEDANA___NICHICON KL

PH00 Filter Amp
CH13 10uf 25V Tantalum__10uf 25V___647-UKL1E100MDDANA___NICHICON KL
CH14 10uf 25V Tantalum__10uf 25V___647-UKL1E100MDDANA___NICHICON KL
CH15 100uf 35V_________100uf 35V__555-RFS35V101MH5#5___ELNA SILMIC II
CH16 100uf 35V_________100uf 35V__555-RFS35V101MH5#5___ELNA SILMIC II

P700 Power Amp 2X
C701 2.2uf 35V Tantalum__2.2uf 50V__647-UKL1H2R2KDDANA__NICHICON KL
C703 10uf 35V___________10uf 35V__647-UPW1V100MDD_____NICHICON PW
C706 100uf 35V__________100uf 35V_647-UPW1V101MPD_____NICHICON PW
C709 10uf 100V__________10uf 100V_647-UPW2A100MED_____NICHICON PW

P800 Power Supply
C801 1000uf 70V Axial__1000uf 100v Axial__647-TVX2A102MDD_____NICHICON VX OR 594-2222-021-19102__Vishay/BC 021 ASM
C802 1000uf 70V Axial__1000uf 100v Axial__647-TVX2A102MDD_____NICHICON VX OR 594-2222-021-19102__Vishay/BC 021 ASM
C803 100uf 25V_______100uf 25V_________647-UPW1E101MED____NICHICON PW
C804 100uf 25V_______100uf 25V_________647-UPW1E101MED____NICHICON PW
C807 100uf 16V_______100uf 16V_________647-UPW1C101MED____NICHICON PW
C808 4.7uf 50V LL_____4.7uf 50V LL______647-UKL1H4R7KDDANA__NICHICON KL
C809 4.7uf 50V LL_____4.7uf 50V LL______647-UKL1H4R7KDDANA__NICHICON KL
C810 220uf 63V Axial___220uf 63V Axial____647-TVX1J221MCD_____NICHICON VX OR 594-2222-021-18221__Vishay/BC 021 ASM
C811 220uf 63V Axial___220uf 63V Axial____647-TVX1J221MCD_____NICHICON VX OR 594-2222-021-18221__Vishay/BC 021 ASM
C812 47uf 50V________47uf 50V__________647-UPW1H470MED____NICHICON PW
C813 47uf 50V________47uf 50V__________647-UPW1H470MED____NICHICON PW
C814 47uf 50V________47uf 50V__________647-UPW1H470MED____NICHICON PW
C815 47uf 50V________47uf 50V__________647-UPW1H470MED____NICHICON PW

PG00 Buffer Amp
CG05 10uf 35V Tantalum__10uf 35V__647-UKL1V100MDDANA__NICHICON KL
CG06 10uf 35V Tantalum__10uf 35V__647-UKL1V100MDDANA__NICHICON KL

PN00 Relay
CN03 10uf 100V__10uf 100V__647-UPW2A100MED__NICHICON PW
CN04 47uf 16V____47uf 16V__647-UPW1C470MDD__NICHICON PW
CN05 220uf 10V__220uf 10V__647-UPW1A221MED__NICHICON PW
LN01 OMRON LY2 48DC__LY2-DC48__653-LY2-DC48__OMRON


Order going in...Since I have most of the Parts, I will start Thursday.
 
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Joe thanks for posting this! These look to be what MTF recommends and most use as a standard Pioneer rebuild set up.

While ordering from Mouser why not just get:

647-UFG1J470MPM 47uf 63V Nichicon FG

Please let me know what you think as you work through this.
 
patfont said:
Joe thanks for posting this! These look to be what MTF recommends and most use as a standard Pioneer rebuild set up.

While ordering from Mouser why not just get:

647-UFG1J470MPM 47uf 63V Nichicon FG

Please let me know what you think as you work through this.
Click to expand...
Good Eye..:yes:

I will not be going Crazy as with the 1060 that was done. This 1250 is Special and took over a Year to find. I have followed what MTF recommended with my Pioneer SX-1250 recap and it's the "Bomb" (with SILMIC II).

I do have the 63V ELNA SILMIC II on hand...Plus I have a Order in with PartsConnexion...FG's are my 2nd choice in my book so FG's can be used on P400 Phone/Mic Amp board...speaking of this board.

If it's OK...I would like to go over the Phone/Mic board with you. Maybe add some Films and AMTRANS Resistors...still going over the schematics.
 
Here are the Main Caps I will be using.

4X EPCOS 8200uf/80v

Board I am using is from Jim's Audio. Needed to cut one end to make this fit. This will work and it's a Clean installation. Just waiting for the 2 Pin Terminal Posts.
 

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