Labels:lodestone | reckoner | sky OCR: KENWOOD ASB-1006 Service Bulletin Amateur Radlo Division Subiect: TS 850S Low/no Receiver Sensitivity Date January 22 1993 Symptom: Reports of low or ou receiver sensitivity accompanied by lack of from the speaker during cwor SSB modes might be caused b Improper RX8 voltage levels. Nomal RXB vollage is vdc during receive and 0vdc during transmit. If you find approximately vdc during receive you might suspect problem with teakins diode D31 on the RF unit X44 -3120-00. Cause: 31 used as the transmit switching Leakage of this diode is most probably caused by electrostatic surge or discharges from the antenna Parts Required: D31 ......... ..M|204 Procedure: temporary cure for units that have already been manufactured is to replace D3 with an MI204 diode Future production radios will change D31 ...
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