Picked up a Marantz SR1000 – Needs some work, Advice or input on re-cap etc

[ARZ540I]

I recently acquired a Marantz SR1000 locally for $20. First impressions even in its current state are good. The receiver itself sounds good, FM and AM picks up good solid and clear signal. 100.7 sounds clear as crystal without an FM Arial wires attached. this is my first vintage piece. I have read a lot of stuff about the quality of this amp vs older stuff from the early to mid 70’s but overall I am happy with my purchase.

So now with the problems. The lights are out on all three sections, Static when switching between input FM to Phono and AUX and static when changing volume, All speaker channels work though.

I downloaded the service manual for this receiver but I am looking for some input from others who have recapped and soldered in general on older AMP or even on this model series.

The lights are the solder kind so I will just do some test soldering and get to those, My main question is with the static issues between volume and input selection. Should I just be replacing all caps within the systems seeing as I don’t know the history of the unit and or services performed? Or just the caps the work for these functions? I will be doing this myself as sending it off would far outweigh the value of it.

Unit is rust free., Seems to have been in AZ it’s whole life so no moisture damage that I can see. Dusty though and needs a good cleaning. I plan on just using some compressed air and some contact cleaner.

If anyone has worked on these SR1000’s before would appreciate the feedback. Difficulty of the jobs, Components to use etc

Thanks

 

[bktheking]

You probably need to deox the controls, switching with static indicates this.

 

[ARZ540I]

You probably need to deox the controls, switching with static indicates this.

Thanks, I will try this first before i attempt anything else. Looking at the way this thing is set up i am going to have to remove quite a bit to get the the metering light. Was hoping for fuse type lamps but no such luck

I did notice the small bulbs are blue which is strange. Most picture show a warm white glow. I wonder if someone has been in here before

 

[bktheking]

They are factory, the lamps were wrapped with a blue plastic.

 

[ARZ540I]

They are factory, the lamps were wrapped with a blue plastic.

Thanks Again. then i suspect i am probably the first one to open this thing up from new. Cleaning work to begin.

 

[Leestereo]

In the SR-1000 that I restored last year, the glue on the 470uF/63V capacitor in the regulated power supply had corroded the nearby components (this type of glue is known to become corrosive). I replaced the caps, the rectifier and other nearby components that were in contact with the glue. Another area to check is the ground connection under the amp pcb to the chassis, this consists of a screw connection. I cleaned the ground pad and added solder as well as a serrated washer. This also resolved the DC offset I was measuring at the output.

When restored this model sounds quite good, the build quality isn't as good as the 22xx series, but its a competent design. They did run the STK463 hard, using a rail voltage of 34V. This gives the receiver good headroom above its rated 25wpc rms, 4 ohms. In actual use, I think it can easily output 30-40 wpc.

 

[Mymamiya]

I have an SR2000 that I've reworked and it was certainly worth the effort, the sound really opened up. I think maybe $30 in parts and it really rocks now. If you have to pay someone else to do the work then it may not be worth it.
For lamps I think I found some locally and used an iron to remove the metal caps and used the bulb part for the freq dial I think.

 

[ARZ540I]

I have an SR2000 that I've reworked and it was certainly worth the effort, the sound really opened up. I think maybe $30 in parts and it really rocks now. If you have to pay someone else to do the work then it may not be worth it.
For lamps I think I found some locally and used an iron to remove the metal caps and used the bulb part for the freq dial I think.

Cleaned it last night and Deoxed it. Leaving it for 24 to see how it turns out. May need a 2nd run.

These lights are in real tight spots on this puppy. I can't believe i am going to have to pull out most of the components to change three bulbs. Especially the metering one.

Agree with your sound assessment, even in it's current state i was Blown away with just how good FM sounded. That was also with it coupled with some crappy Bose 201's that i use in my garage.