Rittenhouse Service & Repair Forum
I am looking for a wiring diagram for a Rittenhouse, Spartan Electric, Fayettevile NC C8845 unit which is 30 to 35 years old. It seems to be either able to use two D cells or 16V transformer but I am got sure how to wire it up. Any ideas? Thanks.
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Industrial Electronic Repair
145 Rockwell Place Ct
Tobaccoville, NC 27050
Phone: 1-336-969-0110
Recent 313 Comments
Urgent Follow-Up Rittenhouse RM Intercom DownDear Team,I am following up on the previous message regarding the non-functional Rittenhouse RM intercom unit. It is imperative that we address this issue
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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:
I have a Master Model 631 & 632, The clock stop working. its showing the red dot on the face of the clock that indicates power failure. The chimes still work fine with no issue. Can you provide instruction on how to test and/or repair. Thank youEddie
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We installed our Rittenhouse intercom system in 1978 when we built our new home. The speakers look out of date and would like a better main unit. We have 4 outside units, and 7 speakers.Can we purchase new units and still use the same wiring? Would appreciate a response ASAP. Thanks Jim MannP.S. Ple…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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Can I use the existing wiring and recessed wall areas of the old system listed above with a new replacement system. If so, what new updated system will work? Thanks
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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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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:
i am looking for the cover of the door chime for the above model that needs replacing.
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The rheostat is broken on this unit otherwise the unit is as melodious as it was 40 years ago.The numbers on the rheostat are 1406417 and 135-51 The motor is a Telechron synchronous motor. 118V--16 Model 3151 RPM 3. W. 4.CantI purchase the replacement rheostat and have it shipped to PMB 399 at the a…Purchase or Repair: 
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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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I currently have this unit for sale on ebay. the wiring is simply two wires from the 16v transformer to the appropriate screw terminals on the printed circuit board and then the \"switch leg\" from each door bell button at the doors you are using attached to the corresponding terminal screw as label…Purchase or Repair: 
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Unit stopped working. Have 16+ volts coming to it but no sound. Assume the syncronous motor is out... Telechron model M3151, Type H18, 3.6 rpm, 60 cy, 16 v. Is the replacement motor available? Price?Could it be anything else? All wiring is in tact on board.Thanks, Bob
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We have an older intercom system M9325 stations, M9318, and M9322. We are wondering if there is anything we can do to reduce the standing hum.Thanks
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I am looking for a remote button for this system.Would possibly trade a receiver unit as I have extra.
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we bought this house with installed system. not working. power source not found.
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There is a malfunction in the Rittenhouse C8578-1 135-7351-01 door chime, disrupting the production line. Immediate repair is required to resume operations
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Good Evening,We have a Rittenhouse Intercom System (solid state Am/FM Radio Intercome) it has got to be at least 30 years old. We are looking to replace the outside speaker box (Nu-tone). Please let us know if this item is still available. We would give you more info on the system, but cannot find s…Purchase or Repair: 
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Hello! Do you have any parts for Rittenhouse (Emerson) All Transistor Radio-Intercom System, Model RM-1 (AM radio) or RM-2 (AM/FM radio)? Our system dates from the 1960\'s--still going strong. But I need knobs and especially the instruction manual because I don\'t know how to answer and use the exte…Purchase or Repair: 
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I have a Rittenhouse 550, 551 doorbell chime.The unit itself works fine. What I am missing (which someone was supposed to nor trash) is the transformer that sequences the chimes. Do you have a transformer for this that will work? And if so, obviously, what would one cost?Thank you for taking the tim…Purchase or Repair: 
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we have an old set of chimes which were taken from our hallway after a fire, now they require repair, model number is not visible, however, it is a four long pole, with 4 or 8 note feature.would love to repair this
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Ubit was working fine, decided to hook up old style HI-FI unit per instructions and started blowing fuses. Looks like I created a short! Can you give me an idea of cost to repair and shipping charges? Thanks, John Medina
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Only one of four chimes works, although we detect a faint electronic buzzing, in sequence, of the other three. For example, we hear Chime A, buzz, buzz, pause, buzz, buzz, Chime A. As cover has been lost, we suspect dust and grime is keeping the other hammers from working.Can the unit be cleaned and…Purchase or Repair: 
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This problem may be caused by a lighted doorbell. After the bell is wrung, the light will re-illuminate. When that happens it may be drawing just enough power to make the door chimes think that the button was pressed once again. This is a repeating pattern.If a lighted door button is used, the solut…Purchase or Repair: 
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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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Do you sell parts? I am looking for a replacement potentiometer for an Emerson-Rittenhouse RC 633. It is labeled Clarostat 140-6747/ 135-51.
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My manual says 4-8 Note Chime Models (534, 535, 552, 577, 618, 633). I don't know which one I have. It has long chime tubes and a clock on top. The door bell works great, but the clock doesn't.
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Have model C 8203, 10 volt door bell. Am missing the push button remote that fastens to wall outside the front door. Any suggestions?
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I would like to see if I can get this to work. But I don\'t know where to start.
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I'm looking for a replacement circuit board for a Rittenhouse model C8538. Please let me know where I can purchase one.
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Years ago lightening hit house the chime stoped working the unit is in the kitchen and of coarse the door bell at the front door to push with finger ..doesnt work anymore can this be fixed ??/
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Hi there, I'm interested in purchasing the Rittenhouse C8578-1 135-7351-01 door chime. Could you please provide me with information on pricing and availability? I'm looking to source one quickly. Thank you!
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—> Purchase or Repair:
I have just recently purchased a house that has a Rittenhouse Model 7300 Intercom system that does not work. I am trying to find a schematic for it. I know that it is an old system, but would like to use it to monitor my young children. Any help would be appreciated.Thank you.Eric Hoffman—> …Purchase or Repair: 
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Hello, I am inquiring about part number Rittenhouse C8578-1 135-7351-01, which seems to be a door chime. My client is experiencing issues with it and would like further information on how to address the problem. Thank you for your assistance.
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—> Purchase or Repair:
Can you advise if a Emerson Rittenhouse RC 577 Doorbell mechanical chime will work with a 24V Transformer?I have a 16V and wanted to add a camera to this?ThanksGene 732-754-1205I cannot locate a manual im guessing this was made in the 70\'s
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I have a Rittenhouse model c8229 door bell in my home that is not working. I would like to have it repaired.Thank you,Jolene Gross717-781-3692
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—> Purchase or Repair:
I recently purchased an older home that has a Model # RC-475 - 16 volt door chime that works fine, but lacks the cover. Is it possible to purchase just a cover from you or is something like this no longer available. Amazon has one but the mfg. dimensions wouldn't fit. As close as I can measure …Purchase or Repair: 
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Dear Sir: I\'m looking for a electric schamitic for an Emerson Rittenhouse intercom Model rm20/rm22. Any help in this matter would be appropriated. Thank You, JAY
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—> Purchase or Repair:
I would like to know if spare components are still available? eg transistors and LM283T 5 pin audio amp or regulator? Or is there a replacement UNIT and what is the cost for a compatible unit.
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—> Purchase or Repair:
I h ave a rittenhouse intercom system that does not work star system 9000 I would love to get it to work again. Can you help me with this thankyou glen
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—> Purchase or Repair:
I have an old rittenhouse 7021 (I think) it is from 1978. It needs a new from cover and the dial to change the stations doesn\'t work. Otherwise it works. Can it be fixed and about how much?
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