23 Nov
2013
23 Nov
'13
10:44 a.m.
On 11/22/2013 12:48 PM, tom wrote:
I have an Epson FX-185 impact printer. It was in
storage for several years.
It now makes a constant high pitched noise from the speaker as soon as it
is turned on. The noise is definitely coming from the speaker.
Does it work otherwise, or do you mean that's all it does? (My multimeter
"failed" with its continuity buzzer permanently on recently, but is
operating fine otherwise. Weird)
It is
supposed to do so when out of paper. The out of paper sensor is functioning
correctly I even disconnected that sensor from the board and still get the
sound whether or not the circuit is completed. No bulging capacitors. Parts
of the board are grungy. Wondering how to go about cleaning the circuit
boards.
Well, "grunge" shouldn't affect operation, but of course corrosion
will/might (depending on severity). Personally I usually use isopropanol
and/or distilled water, then leave somewhere warm to dry for a few days.
cheers
Jules