Ramsey Electronics FM100B, Инструкция по эксплуатации

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FM100B
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the bottom side of the speaker) is facing towards C10 and away from Q1.
This is where confirming tones are sounded when a button is depressed.
12H. Install R1, a 10K ohm resistor (brown-black-orange).
13H. Install R2, a 10K ohm resistor (brown-black-orange).
14H. Install R3, a 10K ohm resistor (brown-black-orange).
15H. Install J4, a 5-pin connector. Solder the short end to the board. This is
where the display power and signals are sent for the front panel.
16H. Install the 20 pin IC socket for U1. If the socket has a notch in one end,
install it in the same position as shown on the Parts Layout Diagram to
prevent confusion later.
17H. Install U1, the IC with the sticker labeled FM100B into the socket. Find
the dot or notch on one end of the chip and orient it as shown in the Parts
Layout Diagram. If your chip has a large “1” on one end (signifying pin 1),
this end is oriented as though it were a notch. It should be placed at the end
of the socket closest to R17. This is the “brains” of your unit that keeps track
of all the button presses, the frequency lock, and the rest of the circuitry. Be
sure all 20 pins are firmly in the socket and none are bent under.
Take another break and check all of your work for soldering and part
installations for possible problems before we move on to the Jacks and
Switches.