Ramsey Electronics SP1, Руководство пользователя

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SP-1
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9
A) If you plan to use your SP1 as a telephone speakerphone, install zener
diode D5 (small gray body with black band). The banded end marks the
cathode and must be oriented as illustrated.
B) If you plan to use your SP1 only as a duplex intercom, do not install D5.
Place it in a safe place for possible future use.
8. The six 1N4002 style black epoxy diodes are installed in upright or
vertical position. Correct orientation of the banded cathode ends is
important, so always install the diode body in the hole marked by the circle
on the PC board illustration. The banded or cathode end should face up.
The diodes may come with straight leads or pre-bent, ready-to-insert leads.
Install diode D1.
9. Install D2, another black epoxy diode.
10. Install D3, another black epoxy diode.
11. Install D4, another black epoxy diode.
12. Install D6, another black epoxy diode.
13. Install D7, the last black epoxy diode.
14a. The method for installing the microphone to face the
front panel and therefore requires soldering the MK1
element's terminals to three short bare wires (nipped from a
previously installed component), so that the three wires are
at right angles to the MK1 lugs. Notice that one MK1 lug is
common to its metal case and must be oriented toward the side of the
board so that it is connected to the common ground plane. You may wish to
do both ends of this connection first to hold MK1 in place to do the other
connections.
14b. If the mike element has only two pins, install a bare wire jumper from
"D" to "E" and omit C5 (Step 16). Study the schematic diagram for any
clarification needed.
14c. Install mike element MK1.
14d. Solder a wire loop to secure the mike, using the 2 PC board holes on
each side of the microphone.
15. Near MK1, install C9, .01 uF (marked .01 or 103 or 10 nf).
16. Install C5, a 2.2 uF electrolytic. This is the first of 21 electrolytic used
in your SP1. Be sure to orient the (+) side as shown on the PC board
drawing. Note on electrolytic capacitors: Ordinarily, the negative (-) side is
clearly marked by a heavy stripe and the "-" sign. However, the positive (+)
side may be marked instead, especially on low values such as the eight .47