Labels:reckoner | sky OCR: KENWOOD ASB-1016 Service Bulletin Amateur Radio Division Subject: TS 950 Hum with Monitor ON Date: May 1993 Symptom: on early versians of the TS-950 series (below Serial Number 1060XXX) hum might be heard when the MONI function te active and headphones are connected to the PHONE jack No hum experienced when the MONI circuit is OFF Cause: This noise can onfy be found in the monitor circuit itself and not on the transmitted signal. We have found that the vCO shield cover for the PLL unit might be contacting the shield plate for the filter unit Ths physical contac can allow slight amount of vibration to bo felt in the sub-receiver This voration combined with tao much gain in the sub- receive section contributes to the hum. Parts Required: Description Kenwood Part No Circult Description LOW pr ...
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