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cr-840

  1. tutor_turtle

    CR-640 both meters stuck

    Digital volt meter shows proper signals are getting to the meters. With meters out, blowing lightly on the needles, they stick all over. 99% alcohol has not freed up the stickiness. Could be a victim of cigarette smoke. I have read all the past posts on this question, but no one has addressed...
    • tutor_turtle
    • Thread
    • cr-640 cr-840 malfunctioning meters signal meters stuck meters
    • Replies: 2
    • Forum: Yamaha
  2. R

    CR-840 schematic in 6 parts

    I haven't been able to find the CR-840 schematic out on the webs. All the service manuals I've found online are from the same scan and they are missing pages 13 and 14 which contain the schematics. They also contain two extra pages of circuit board images inserted between p10 and p11 which are...
    • ring
    • Thread
    • cr-840 schematics
    • Replies: 13
    • Forum: Yamaha
  3. cnolanh

    CR-840 — don't always assume the worst

    I've got a CR-840 as the anchor of my office system. It plays music softly most days, once in a while gets to play at medium volume, and it never gets cranked. This Yamaha is a beautiful machine that has worked at nearly 100% for many years (only flaw is that the Low Filter switch won't stay in...
    • cnolanh
    • Thread
    • cr-840 receiver yamaha
    • Replies: 8
    • Forum: Yamaha
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