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
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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Moved in 3 years ago the AM/FM worked but nothing else. Wondering if I could get an estimate
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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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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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Could you please direct me as to where I may be able to obtain a circuit diagram for a rittenhouse installed in the 1980?Many thanksJoe
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Trying to hook up ring with the rittenhouse 531 model. Not sure how the wiring should be set up? 4 white and red wires with 0-4 posts?
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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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I am a property manager who manages a townhome with a broken Rittenhouse intercome system. The speakers on the exterior are installed in the brick so to remove them is a huge project. The main console in the kitchen is what I am looking to repair or replace. The model number is: (looks like) M7034. …Purchase or Repair: 
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sheetrocking my house after it was flooded by katrina, the contractor stupidly threw away the master station to my doorbell/radio/intercom system which rendered the system inoperable. i have asked an electrician friend to look at it and he cannot find a suitable retrofit. we will have to replace the…Purchase or Repair: 
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I bought a house built in 1950 with an old Rittenhouse door chime, Model #365. I have no idea if it can be repaired. I don\'t have the front door button. The inner workings are very dirty. Do you think it\'s worth sending to you? Thanks, Kathie
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I TOOK THE CLOCK TO A ANTIQUE DEALER HE TOOK THE MOTOR OUT AND REPLACED IT WITH A BATTERY UNIT. I AM LOOKING TO REPLACE IT BACK WITH THE ORIGINAL MOTOR.
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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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I need a Rittenhouse door bell botton part number C8000. Is this womethign you may have?
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I have read several threads asking about updating an old Rittenhouse system. I would like to do the same, hopefully avoiding the need to replace drywall, etc., since this system is considerably larger than the Nutone products. I couldn\'t find any responses addressing whether or not there were solut…Purchase or Repair: 
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HAVE --MODEL DS-2 DOOR SENTRY SAYS 'NOT TO CONNECT TO POWER SOURCE OTHER THAN STANDARD 16 VOLT CHIME TRANSFORMER'NEED TESTING OF ITS TRANSFORMER.I THINK ITS THE TRANSFORMER!WHAT IS PROCESS TO FOLLOW FOR THIS?ANDREW h=773-589-0150 c=773-899-0423
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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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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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HAD LIGHTNING STRIKE AND WOULD LIKE TO REPLACE IF YOU HAVE A RETRO UNIT TO REPLACE 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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—> Purchase or Repair:
Our current cover is kind of an almond color. After remodeling our living room, all of the vents, outlets, etc. have been done in white. Would it be possible to purchase a white cover to replace the almond one for our door chime? What would the cost be?Please respond even if not available before I r…Purchase or Repair: 
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I have a Rittenhouse 631/632 doorbell that works ok but the clock motor is noisy. Can I buy a replacement motor for it?
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I would like to install my RC633 which I removed from my old house. Can you send me instructions? Thank you.
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I have renovated my house. I have a Model RC577 chime that is not working. I seem to have all the parts, 4 chimes, motor, etc.Please help me figure out how to repair.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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Have a Rittenhouse intercom system installed in 1956. There appears to be a dead short in the Master.Is there a NuTone Master AM/FM which will work with the satellite room units?
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I have the above mentioned door chime (Rittenhouse door chime model C8536) that does not work correctly. There where some broken wires from the transformer coils that I soldered back on and now it does not work correctly. Do you have a schematic for this unit?
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I have had this for almost 50 years and the clock does not work, for some unknown reason, and the chimes are weak sounding and miss at times. I need help. Can this be repaired?
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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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Hi, I have a Rittenhouse 330 Chime that is not working. Is there a way to get a rough estimate of cost? It may be the transformer or the hammers as they are sticky.David
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I have a clock and doorchimes door bell model RC-633.I would like to get relacement part for the door bell part, the clock is still working.Can you help me
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I have a very old doorbell/ clock combination. The Model # is 450. The chimes work but not the clock. Since it is installed into the wall is there one the will replace using the same insert?
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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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Do you have available a manuel for the emerson ritterhouse RCM-4 intercom. I have to re- install mine
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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 have three doorbells connrcted to chimes but only one works, any suggestions?
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I have an Emerson Door Bell C 8204 and it is not working. Need a response to this E- mail please.
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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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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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Drive or board failure on Rittenhouse M7012 intercom/radio. Needs immediate attention to avoid disruption. Heading to next location now.
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Please provide an update on the status of the Rittenhouse C8578-1 135-7351-01 door chime unit. It is still not functioning, and we need attention on this matter soon. Thank you.
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—> Purchase or Repair:
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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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:
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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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 am radio intercome that works well. It has 7 receivers + the base unit. can it be changed to fm ? I believe it is a late 60s mdel. thanks
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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:
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