Rittenhouse Service & Repair Forum
I have a Rittenhouse Home Intercom, Model No. M7010 that had no audio. A technician said the amplifier was bad and he replaced several transistors in it, but the volume is very weak. He does not know exactly what transistors to use to replace the old ones, and does not have a schematic. Can you provide a schematic, or tell me where I might get one? Thanks, Tom Mitchell
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If you need your Rittenhouse unit tested or repaired,
give us a call at 1-336-969-0110.
We offer free estimates and extended warranties on the work performed.
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Industrial Electronic Repair
145 Rockwell Place Ct
Tobaccoville, NC 27050
Phone: 1-336-969-0110
Recent 312 Comments
Hello, I purchased my 4 note-8 note melody door chime in 1995. It has been set up on a battery operation operation
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—> Purchase or Repair:
Please provide information needed to ship my unit to you for repair estimateand possible repair.I am assuming you need only the radio(master unit).Thank you!
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—> Purchase or Repair:
We are looking for the Rittenhouse C8931R Wireless Chime Receiver.We are an electrical contractor and are working with a customer who loves her chime system but wants to expand it to other areas of her home.Can you point me in a direction to locate one of these?Thank you.
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—> Purchase or Repair:
Ihave about a 30 year old rittenhouse with 4 chimes.It seems that the solenoids that activate the strikers,are getting a little lazy.I have had one apart and try to clean it ,with not much succes,I even lost one of those tiny springs. I tried to replace it with a similar one ,but it\'s not right.Do …Purchase or Repair: 
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Art - did you get a reply in answer to your post?I am about to restore the same door chime, you may have info that can help.ThanksFred...
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wonder if I can acquire 1of the 3 boxes that throws the donger to. ring the far right chime of 3
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plungers have stopped (tried lube) is model w clock can they be replaced by myself or must this be done by a pro or can the entire panel be more easily replaced thank you
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—> Purchase or Repair:
The clock works fine. Three of the door chimes work, but the fourth and fifth strikers do not work. Do you repair and or have parts to recondition? Thanks, Tedd
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—> Purchase or Repair:
Bell is connected to two doors. The front door works fine. The rear door won't ring at all. Can't tell what might be disconnected. Any ideas would be a big help. Thanks.Ken Bentham
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—> Purchase or Repair:
Just wondering i have a rittenhouse system rcm-1 and the intercom system part does not seem to be working. We can broadcast for the main unit and it is heard in the other units but when we try to broadcast from one of the other units to the main you can not hear the person ? Anysuggestions or do you…Purchase or Repair: 
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The Rittenhouse C8578-1 135-7351-01 door chime is malfunctioning and needs repair. Urgently seeking a technician to address the issue as it's disrupting daily operations.
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—> Purchase or Repair:
Can you repair the solo kids on this 1950s era doorbell?It’s generally ok except that some of the parts that slide in the tubes to ring the chimes are lost. I could send it in or you could sell me the parts to fix it myself. Thanks,George Pond
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—> Purchase or Repair:
My home was built in 1965 with the same Rittenhouse intercom/radio system that doesn\'t work anymore. I would like to upggrade with intercom/radio/ satellite radio system can you do the work? What would be the estimated cost?
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—> Purchase or Repair:
Similiar issue, my doorbell kept sticking. So I replaced the sticky button but now my springs inside the bell housing seem to be sprung and unable to move the plunger the full range to ring or retract.
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I have a model Rittenhouse # E780DC door bell push button. The center plastic button is broken. I need a replacement . I can use the whole assemblyPlease email me as to where I can buy it. Thank you.
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—> Purchase or Repair:
The unit works, but possibly in need of some service. The AM radio works , but no FM. There is a bit of background noise in the system.
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I\'ve recently come in the possesion of an emerson-rittenhouse model 633 door chime and clock. Somebody must have placed 120volts of power to the 16 volt circiut burning out all the electronics. I need all the electrical components including the hammars and motors. if anyone knows where i can get pa…Purchase or Repair: 
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Ihave a 20 year old rittenhouse intercon that does not and love to get it working again or replaced can you help
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I have a 30 year old rittenhouse door chime with the 4 sequential chimes, one of the plungers has gone lazy. I took the transformer out to try to clean it and lost the little spring that gives the plunger resistance . Do you have any ideas ?Or do you sell parts, perhaps a whole tansformer. I tried t…Purchase or Repair: 
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Model# S7808. The detector has been making loud clicks, usually two at a time. What does this mean? Replace it or cleaning. Please help very annoying.
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—> Purchase or Repair:
Tag on door chime unit says:Model 8846RVolt 16Rittenhouse Division Spartan ElectricFayetteville NC 28386The unit has four tubes, it has a circuit board with integrated circuits. The transformer is putting out 18.5 volts, although the unit says 16 volts on transformer and circuit board. I assume the …Purchase or Repair: 
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I am looking for a replacement unit or one that is compatable and larger to cover existing hole. please respond even if you are not interested or cant get what I need so I can try elsewere.
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—> Purchase or Repair:
Hi,Some one open the wires of my door bell Model C8550 (in the bell). Would you please give the wiring/connection diagram for this door bell so that I can re-connect the wire to operate my door bell.You co-operation & early response will be highly appreciated.Regards,Qaiser Baig—> …Purchase or Repair: 
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Jennifer Walker:Did you ever figure out what to do about replacing your Rittenhouse unit? I\'m in the same boat!Any ideas or products you have come across on your own would be appreciated
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The door chime is not working properly in that some of the hammers are not striking properly. sometimes they reach the tubes and sometimes not. They are all active but not as strong as they should be .I have turned down the adjuster and none strike and when turned up, it is as I have described . The…Purchase or Repair: 
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I have a Rittenhouse Model S7806 Smoke/Fire detector system in my 3-level condo. It was there when I moved in so there is no manual for it.My problem is, after a thunder and lightening storm the other day, I came home to find all 3 units ringing. The only way I could silence them was to switch off t…Purchase or Repair: 
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I have a Rittenhouse intercom system that was installed in the 60\'s that worked fine until recently. Everything still works fine except the main intercom/control unit. Is there a replacement unit I can buy that I can use with all my existing speakers, etc throughout the house? Even a unit that only…Purchase or Repair: 
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My model 552 is not working. Licensed Electrician checked it out and it need replacement parts. I want to keep actual doorbell, because of sentimental reasons.
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HiI have the above chime box and wish to re assemble it. I took it down for decorating purposes.There is a black/dark blue wire, a yellow wire and a red wire. There is trans, front and rear. My question is what wire goes with what?Many thanks Michael Donnelly
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—> Purchase or Repair:
Cannot reset time seems stripped.Only two of the chimes work.Where are you physically located.ROUGH repair cost.
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—> Purchase or Repair:
just a heads up that the Rittenhouse RM20/RM22 intercom with radio unit went down mid-shift. Can you please check it out and follow up during the day? Thanks!
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—> Purchase or Repair:
I need a Rittenhouse door bell botton part number C8000. Is this womethign you may have?
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—> Purchase or Repair:
The system is old and has not worked when I bought this house. Wish can fine some one to fixe and test it.
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—> Purchase or Repair:
need troubleshooting info on rittenhouse model m7900 amp ser# 3060-0074-2091. also, price and availability of parts as i am working on an intercom system in a 8 unit condo.
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—> Purchase or Repair:
Looking for a sequencer box for a model 552 doorbell chime. I know they are rare. Does somebody make a retro fit or do you have a good used one. If none of the above then how about schemetics and I will get one made. Thanks-Tom
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—> Purchase or Repair:
I need to purchase a new door bell system comparable with the existing system. I have a one unit on the main level and the other in the basement. The Model number of the existing system is C8203 16 volts AC. I need both units to include outside switch. Also where are the transformers located for thi…Purchase or Repair: 
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I AM LOOKING FOR A DOOR CHIME FOR MY BUSINESS THAT WHEN SOMEONE ENTERS THE FRONT DOOR THAT I WILL BE ABLE TO HEAR THE CHIME IN OTHER AREAS OF MY BUILDING AS WELL. I NEED SOMETHING THAT WILL HAVE A LOUD CHIME BECAUSE MY BUILDING HAS MACHINERY RUNNING ALL THE TIME. CAN YOU SEND ME SOME INFORMATION. TH…Purchase or Repair: 
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Are there any Emerson Rittenhouse intercom main stations from the mid-sixties available?
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—> Purchase or Repair:
Hello, I have a rittenhouse door sentry. #M9035 w/ a M 9305 door station. The indoor station seems to work, it unlocks the door when the button is pushed. The M9305 out side station is my problem, the speaker is fried and the button is missing. Would you have these items? or where I might find them.…Purchase or Repair: 
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I know this chime assembly is very old but is there a replacement kit for the hammers. they are sticking and perhaps the springs are just too soft. I\'d appreciate any help you can give me.
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—> Purchase or Repair:
Need a schematic for the Emerson-Rittenhouse Model rm20/rm22. Need to know transistor replacement numbers for the front end tuner.Thanks,Don
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—> Purchase or Repair:
i would like to have an updated model the one i have was installed in 1977 it makes noise, drifts off stations all controls are noisey and sound is garbled. can you tell me where to get help.
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—> Purchase or Repair:
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