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|    sci.electronics.repair    |    Fixing electronic equipment    |    124,944 messages    |
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|    Message 123,474 of 124,944    |
|    legg to All    |
|    Sangean Emerson ATS803 intermittent tuni    |
|    16 Feb 23 12:32:44    |
      From: legg@nospam.magma.ca              I've got an Emerson ( ~ Sangean) ATS803 that has started to mistune.              Example:              Basic commercial FM band tune in 99.1MHz and get intermittent       shift in recieved signal as high as 99.9, with no alteration       in displayed frequency (reads 99.1).              This gradually worsens (by frequency pull) until the 99.9MHz       signal is continuous. To get 99.1MHz signal out then I have to       tune displayed frequency to ~ 98.4MHz. This is just a notable       example - smaller shifts have been seen (AIR). I've had to       retune the display downwards in increments to keep the 99.1MHz       reception.              It is physically dependent on something. With the case open,       pressure on front display can induce it, though all ribbon       cables have a fibre insulator installed to prevent pentration       of sharp component leads.              With RF board lifted, there seems no predictable or repeated       movement of anything simple that can induce it, but movements       of the entire rf board will: This can occur with RF board close       or distant. No assembly pressure on cables is required.              Tapping/wiggling cables and connectors doesn't aggravate or       repair it. Tapping/rotating the digital tuning assembly doesn't       affect the intermitency.              Finger placement/force on RF board doesn't change anything.              It's sitting on the bench open and behaving, but I can induce       problem with mech RF board movement or by reassembly at any time.              Ack.              RL              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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