Project: Marantz 1030

[Super Noob]

As my passion to find and rebuild vintage equipment from the golden age continues, the next local find is a little cap coupled early 70s Marantz 1030 that was sick. It is littered with those failure / noise prone 2SC458s. Every time I run into a cap coupled amp, I am always floored how well they sound.

The following posts will highlight the rebuild of this set... I hope to show that even the most inexperienced folks with a little ambition and some self-education can rescue a relic of the past. Hope you are entertained and enjoy my journey. Many here have rebuilt the 1030, and I must admit - it is a worthy amplifier. With some efficient speakers, this thing can get the job done.

Here is the details of the 1030:
* Cute
* 16.5 lb
* 1973 First Year of Production
* 15 WPC RMS (8 Ohm) 20 Hz - 20kHZ
* .5% THD

 

[Super Noob]

Power supply is reading fine... so lets skip the typical order and jump on the Tone / Pre Amp.

Tone-Pre Amp (P500)
C501 Mylar Film .22uf MKS4F032203F00JI00 WIMA .22uf 250v
C502 Mylar Film .22uf MKS4F032203F00JI00 WIMA .22uf 250v
C503 Electro LL 4.7uf 35v MKS2C044701M00JO00 WIMA 4.7uf 63v
C504 Electro LL 4.7uf 35v MKS2C044701M00JO00 WIMA 4.7uf 63v
C505 Electro LL 1uf 25v MKS2C041001F00KC00 WIMA 1uf 63v
C506 Electro LL 1uf 25v MKS2C041001F00KC00 WIMA 1uf 63v
C509 Electro 100uf 10v UPW1C101MED Nichicon 100uf 16v
C510 Electro 100uf 10v UPW1C101MED Nichicon 100uf 16v
C511 Electro 10uf 35v UPW1H100MDD Nichicon 10uf 50v
C512 Electro 10uf 35v UPW1H100MDD Nichicon 10uf 50v
C513 Electro LL 3.3uf 25v MKS2B043301H00KSSD WIMA 3.3uf 50v
C514 Electro LL 3.3uf 25v MKS2B043301H00KSSD WIMA 3.3uf 50v
C515 Electro 100uf 35v UPW1H101MPD Nichicon 100uf 50v

H501-H506 2SC458LG KSC1845FTA

 

[Super Noob]

Power Supply (P-800)
C803 Electro 470uf 63v UPW1J471MHD Nichicon 470uf 63v
C804 Electro 100uf 50v UPW1J101MPD Nichicon 100uf 63v
C805 Electro 100uf 50v UPW1J101MPD Nichicon 100uf 63v
C806 Electro LL 220uv 63v UPW1J221MPD Nichicon 220uf 63v

H801 2SC1213A KSC2383YTA
H802 SIB-01-02 1 A / 200V 1N5059TR 2 A / 200V
H803 SIB-01-02 1 A / 200V 1N5059TR 2 A / 200V

 

[Super Noob]

Phono AMP (P900)
C901 Electro LL 2.2uf 25v MKS2C042201K00JO00 WIMA 2.2uf 250v
C902 Electro LL 2.2uf 25v MKS2C042201K00JO00 WIMA 2.2uf 250v
C909 Electro 100uf 6.3v UKA1C101MDD Nichicon 100uf 16v
C910 Electro 100uf 6.3v UKA1C101MDD Nichicon 100uf 16v
C917 Electro LL 1uf 25v MKS2C041001F00KC00 WIMA 1uf 63v
C918 Electro LL 1uf 25v MKS2C041001F00KC00 WIMA 1uf 63v
C919 Electro 47uf 50v UPW1J470MPD Nichicon 47uf 63v
C924 Electro LL 10uf 25v UES1V100MEM Nichicon 10uf 35v
C925 Electro LL 10uf 25v UES1V100MEM Nichicon 10uf 35v

H901 SC1344E KSC1845FTA
H902 SC1344E KSC1845FTA
H903 2SC458LG KSC1845FTA
H904 2SC458LG KSC1845FTA

 

[Super Noob]

Power AMP (P700)
C701 Electro LL .47uf (found 1 uf) 25v ECW-FD2W105J Panasonic PP 1uf 450v
C702 Electro LL .47uf (found 1 uf) 25v MKS2C034701E00JSSD Panasonic PP 1uf 450v
C703 Electro 330uf 50v UPW1J331MHD Nichicon 330uf 63v
C704 Electro 330uf 50v UPW1J331MHD Nichicon 330uf 63v
C707 Electro 47uf 50v UPW1J470MPD Nichicon 47uf 63v
C708 Electro 47uf 50v UPW1J470MPD Nichicon 47uf 63v
C709 Electro 47uf 50v UPW1J470MPD Nichicon 47uf 63v
C710 Electro 47uf 50v UPW1J470MPD Nichicon 47uf 63v
C711 Electro 10uf 35v UPW1H100MDD Nichicon 10uf 50v
C712 Electro 10uf 35v UPW1H100MDD Nichicon 10uf 50v
C715 Electro 100uf 10v UPW1C101MED Nichicon 100uf 16v
C716 Electro 100uf 10v UPW1C101MED Nichicon 100uf 16v
C717 Electro 22uf 25v UPW1V220MDD Nichicon 22uf 35v
C718 Electro 22uf 25v UPW1V220MDD Nichicon 22uf 35v

H701 2SC945 KSC945CYTA
H702 2SC945 KSC945CYTA
H713 S3016R 1N4148
H714 S3016R 1N4148

R723-724 Center Voltage 100K ohm 67YR100KLFTB
R729-730 Bias Trimmer 470 ohm 3386F-1-471LF

Some re-pasting along the way.... outputs.

 

[Super Noob]

Almost done... lets jump on the main filter cap and the final coupling caps:

Main Filter Electro 4700uF 50v B41231C8688M000 TDK 6800uF 63v
Coupling Cap 1 Electro 2200uF 25v LKG1V222MESACK Nichicon 2200uF 35v
Coupling Cap 1 Electro 2200uF 25v LKG1V222MESACK Nichicon 2200uF 35v

You can see my method... for moving solder lugs to snap terminals.

 

[Super Noob]

Some final shots.... very sweet integrated indeed.

 

[ocdecio]

Beautiful work. great write-up.

 

[Steven Tate]

Very nice work! I have a 1030 in original state that I use as my workshop amp. It has been on the back burner for 4 or 5 years now as I keep getting bigger amps/receivers to restore. But this makes me want to move it to the head of the line. It HAS to sound better with all of those high quality components going into into it. I wish there was a way to sample the actual sound online, but we're not there yet. Beautiful!

 

[Super Noob]

Steve…. Amazing sounding little guy. You could go with UKL or UES in lieu WIMA for those low leakage caps if you don’t want to do films. Regardless changing those small transistors is a must.

 

[Super Noob]

Delete.

 

[Steven Tate]

Steve…. Amazing sounding little guy. You could go with UKL or UES in lieu WIMA for those low leakage caps if you don’t want to do films. Regardless changing those small transistors is a must.

I usually do use the WIMA's all over the preamp boards. I also tried that Mundorf EVO Oil at the inputs once. I really couldn't hear a difference - although I don't claim to have golden ears. Anyway, I use .22uF WIMAs there these days.

 

[db SANSUI]

NICE! I agree with Ocdecio, I love seeing the the nice upgraded Wima and Bourn pictures and A.K. pictures period. Man I even like the last picture taken of all the old parts. Your a very organized Person. SUPER! Knoob that is

 

[Lavane]

Replacing the trimmers Marantz used is mandatory for me. I've had too many that just wouldn't stay stable.

 

[ocdecio]

Replacing the trimmers Marantz used is mandatory for me. I've had too many that just wouldn't stay stable.

Any suggestion what to use to replace this type of trimmer? This is for a 2235 and for the 4270.

 

[Lavane]

Any suggestion what to use to replace this type of trimmer? This is for a 2235 and for the 4270.

View attachment 2410587

I haven't run into that type before. But a Bourns trimmer with the same lead spacing should work. Maybe start a thread with that picture and someone will chime in with a part number or link to what they used.

 

[andromediamn]

Beautiful work !!!

 

[KarmaLess]

Dude.

 

[KI2000]

Hi @Super Noob
Thanks for the write-up. I just became owner of a Marantz 1030 and it has never been recapped.
I noticed the dc output voltage on the speaker terminals is too high and not stable at all, so I'm going for a full recap on it.

I used your parts list and found most of the parts, but as you probably know Nichicon had stopped manufacturing some series and they are no longer in stock.
Forced to find substitutes for some parts, I came up with these:

C711 EEU-FC1H100L C712 EEU-FC1H100L C715 UPM1C101MED C716 UPM1C101MED C717 UPM1V220MDD C718 UPM1V220MDD C509 UPM1C101MED C510 UPM1C101MED C511 EEU-FC1H100L C512 EEU-FC1H100L C924 UES1H100MPM1TD C925 UES1H100MPM1TD Could you maybe help me and check if this seems to be ok? Thanks a lot in advance.

 

[dankik]

I noticed the dc output voltage on the speaker terminals is too high and not stable at all, so I'm going for a full recap on it.

Comment: Don't do the full recap until you find and fix the problem with DC on the speaker terminals, otherwise when it doesn't work you will have a difficult time isolating the problem.

Follow the signal from the output of the Main Amp board to the speaker outputs. You will see that the signal passes through a DC blocking 2200uF capacitor (C003, C004) before it gets to the speaker terminals. Check to see if those two are bad (shorted) and replace and test for DC at the outputs again.