Hello? 847 owners.
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I have some troubles with my 847. I experience a low volume in rx SSB, that I fix with a capacitor bypass , but remain a fault in DSP-NR only? in SSB and CW (FM/AM works well).
When the NR switch is depressed the signal disappear in the speaker (Only in the AF stage - Smeter ok),
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I supposed a fault in IC BU4066 SSB/CW/AM/FM switch but, after the replacement of? IC Q1087?the NR fault persist.
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Following the schematic another IC ( Q1115)? act like switch between input/output of dsp, but before desoldering (SMD is not easy to desolder), I would like to know if? somebody have fixed this
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kind of fault.
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Service manual supplied from Yaesu is very poor over this.
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Many thanks for Your support over this topic.
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73 Giuliano IZ3PSL?
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