Labels:book | lodestone | reckoner | sky OCR: KENWOOD ASB 1008R Service Bulletin Amateur Radio Division Subject: TH-78A Call Channel Tone Frequency Error (RevisedDate: May 27 1993 Symptom: When the TSU-7 CTCSS unit is installed the tone frequency of the CALL CH is overwritten under the following circumstances: Program the Call Channel with tone between 67.0 Hz and 114.8 Hz For example 100.0 Hz Program any memon channel with any frequency and tone frequency For example: 118.8 Hz Recall the memory channel to the VFO Recall the CALL channel. The tone frequency of the call channei changes to that of the channel Changes from the programmed 100.0Hz in the example to 118.8 Hz. Parts Required: C Original part....755 17GF-1 155- -3B9 Change to:... 75517GF 170 3B9 Procedure This symptom caused by microprocessor programming error The cure is to ...
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