Technics/Panasonic RDG5772ZC Gear

Many Technics/Panasonic tape decks use this gear for tape transport. They were created from semi-flexible material that tends to crack during the time (well, the parts were produced back in 80’s or 90’s).

You can recognize problem with this gear when you hear ticking noise during playback. At the end you would not be able to play the tape at all, or only in one direction if you have reverse deck.

You can download service manual and disassembly the unit by following steps there. It should not be too complex. The gear is located typically here, the description should be RDG5772ZC.

Broken gear can look like this:

Then you can replace broken gear with my 3D printed one. It is also made from semi-flexible material that is similar to the original one. It was tested in many machines and it operate smoothly without noise. 

You can see function demonstration bellow:

..and example video how to replace the gear – thanks to 阪急5132

Part is compatible with following devices:
MS20, MS600, RS-CH550, RS-CH700, RS-CH900, RS-T9023, RS-TR210, RS-TR232, RS-TR262, RS-TR265, RS-TR311, RS-TR333, RS-TR515, RS-TR535, RX-CT990, RX-DS05, RX-DS35, RX-DS790, RX-DT07, RX-DT5, RX-DT501, RX-DT680, RX-DT690, RX-E250, RX-E300, SA-CH11, SA-CH150, SA-CH455, SA-CH52, SA-CH55, SA-CH72, SA-DH66, SA-VC10, SU-CH80, SU-CH82, SU-CH90, SU-CH92, RX-DT505, GX-89CD, RX-DS620, RS-TR355, RX-DT707, RX-DS30P, SA-CH33, RS-B55, RS-955, RS-TR165.

It might work also with other devices – just check your service manual.

Available for purchase – go to shop.

One thought on “Technics/Panasonic RDG5772ZC Gear

    1. Ciertamente es real..conseguí reparar mi deck con esta pieza..revivir el sonido de antiguos cassetes y por supuesto mi equipo de audio..muy agradecido por el trabajo de precisión que conlleva hacer semejante pieza…seriedad y envio rapido…ánimo a quien posea un deck technics/panasonic que incorpore este engranaje a repararlo…es sencillo de hacer y la satisfacción es enorme

      1. Hola, como conseguiste la pieza?, tienes el archivo para imprimirlo en 3D, estoy buscando ese piñon para mi technics, si puedes ayudarme te estaré agradecido

  1. Today I have replaced both gears p/n RDG5772ZC to my Technics RS-TR333. The cassette deck works perfectly on play, reverse play, fast forward and rewind. The gear is mounted on a small black plastic spindle. As per the service manual I also added some special white grease for plastic into the gear’s hole which is in contact with that spindle. I am very happy! Thank you Martin!

    1. Hi Cristian,
      I am happy to hear that you are satisfied. Thank you for your comment!

  2. I’m very satisfied with the purchase of 4 gears RDG5772ZC . Two months ago I replaced them in my RS-TR232 and RS-TR313 and now I’m enjoying music from my old tapes. So far so good the cassette decks works perfectly and I hope this replacement parts last for a long time. It was a pleasure to deals with you, Martin, and I give thanks to you.

    1. Hi Roberto,
      Thank you very much for nice comment! I am glad that you are satisfied.
      Kind regards
      Martin

  3. I think I need this gear for my own Denon DR-M07. The gear in question is missing 2 teeth, and was making a clicking noise during playback.

    While investigating, I was fiddling with mechanism, and placing tape in place to play, to see if any other solution was possible. But somehow…the playback mechanism become “stuck” in playback mode. Now whenever the deck is powered on, it immediately starts spinning at what seems like fast forward speed…with playback mechanism/head slider engaged…goes for 10-15 seconds and then stops. No buttons work at all. So I have created a new problem I have to solve first, before the simple gear problem can be addressed. 🙁

    1. Hi Tom,
      I am not an expert for these drives. It looks like the drive mechanism is not in stop position to me. Maybe you can try to rotate the reel gears to move mechanism to stop position? You can try to ask a question at tapeheads.net forum…
      Good luck!
      Martin

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