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
I\'M A ROOFING CONTRACTOR IN HOUSTON. WHILE WORKING ON A PROJECT WE BROKE SOME INTERCOM SPEAKER BOXES AND I RPLACE THEM. I WOULD LIKE TO IF SELL THESE INTERCOM SPEAKERS.
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The Rittenhouse C8578-1 135-7351-01 door chime unit caused downtime today from 930 AM to 1145 AM, impacting our operations. Need quick resolution before the next shift. Thank you.
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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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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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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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I have the above model doorbell and really like the sound vs. the new \"electronic sound\" doorbells. Problem is the mechanism inside the doorbell (the part with the two knockers that the wires attach that hit the bells to make the sound) no longer works. Can I still get this part replaced and if so…Purchase or Repair: 
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I have an inoperative Rittenhouse Model 7021 intercom system as well. Can I fix it or do I have to buy new?
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I am searching for a User Manual for the Rittenhouse M9041 AM/FM Radio-Intercom system. The unit is original to the house built in 1982. I have found a tech manual with schematics but now need to locate a User Manual. Any suggestions would be appreciated. Thanks.
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who repairs or work on the old Rittenhouse intercom systems.I would like to do an upgrade. Since I already have holes in the wall from the old Rittenhouse. I would like to upgrade to something along this same size.
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Sir: Please help me diagnose the problem of my C8204 door chime, andthis morning I heard a noisy sound from the unit. And please give menearest service center here in Chino hills, CalifornialThanks
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I have a Ritten House RM-2 Radio Intercom in original box with original instruction booklet AND an OR-11 Outdoor Remote Station I am looking to sell.If you or someone you know would be interested, please contact me.
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Hello, I am living in the house I grew up in and all of a sudden I noticed thatthe front doorbell was not working. The side doorbell hasn\'t worked for a long time. I have done some research so I will give you the information I have.Nutone Chime Signal, made in USA 1952, Model K 26 902 or 002It is a…Purchase or Repair: 
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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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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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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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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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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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Are there any Emerson Rittenhouse intercom main stations from the mid-sixties available?
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My mom and dad has an old (approx.37yrs) rittenhouse intercom system and they need a replacement bulb for the main unit. I\'ve tried searchingonline but since mom nor dad know the exact part # i\'m having no luck.Dad said it was a low wattage pilot lamp?? GE19 or R19???? Any help you can offer would…Purchase or Repair: 
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I get typically one of three chimes to sound when the doorbell is rung, occassionally 2 followed by a buzzing sound. Some of the wires were loose and I tightened them, but still don\'t get all the tones. Any ideas on what to do to get all three chimes to ring?
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My Rittenhouse Master unit has failed. Is there a replacement unit I can purchase?
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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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I have a rittenhouse model c8204 that stopped working, had been working for years. New outside doorbell installed my be the cause.Can I test the bell by shorting the two screw terminals on the rittenhouse inside unit.
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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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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 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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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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I have three doorbells connrcted to chimes but only one works, any suggestions?
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Hello. I have an Emerson-Rittenhouse Door Chime Model RC577 and it has quit working. I was wondering if there is a replacement transmitter available for this chime. It has the motor attached to the transmitter so I don\'t htink I can get a replacement at a store. Any information you could give me wo…Purchase or Repair: 
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The Rittenhouse C8578-1 135-7351-01 is a door chime unit that is currently not working. That's the information I have so far.
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I have a Rittenhouse intercom system and am unsure of the model #. It was installed in the 70\'s. I am painting my condo and would like to replace the ivory cover with a white cover. How would I go about purchasing just a cover? Thank you
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I have a old intercom in an apartment building that has door locks, buzzer, and voice. the call and voice speaker does not work. all the other apartments are working good. Is there a replacement for the apartment units. or a upgrade?
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Having issues with my Rittenhouse RCM-4 intercom with radio - the radio feature is not working. Need repair assistance
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I moved this door chime/clock when it was working from one home to another. The electrician that hooked it up did not do it correctly and I have no schematic for how it should be wired. I know it needs three wires but not sure on which of the 7 screws they get wired to. They do not indicate Com or T…Purchase or Repair: 
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Emerson c8203 replacement transformer?Any help would be appreciated.Thanks, Bill
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Hi I need a cover for the rittenhouse door chime model 380 can u pls get back to me thank you
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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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My Rittenhouse door chime\'s top plunger does not work, the previous homeowner said when he was hooking it up, by accident the top soleniod was getting power all the time and over heated and it has not worked right since... can this be fixed ????
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I have a RM-2 or a M9401 rittnhouse intercom I need a manual or schematic.any ideas where to locate.Don
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The installation manual has been misplaced and I am not sure which wires go to which connection. There is a red wire, a black wire, and a yellow with a green wire. The places to connect are for the front, rear, and transformer. Please advise. Also, there is a possibility that the transformer doesn\'…Purchase or Repair: 
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