27
Common 8-pin DIN Microphone Wiring Table
--------Mic Connector Pin No.-------------
Pad Label
Elecraft Yaesu Ten-Tec Icom Kenwood
MIC+(Audio Out)
1
8 8
1
1
PTT
2
6
6
5
2
MIC- (MIC GND)
7
7
7
7
7
FN1 (FAST)
5
4
--
--
--
FN2 (DOWN)
4
3
--
--
3
FN3 (+V)
6
2
2
2
5
FN4 (UP)
3
1
--
3
4
GND
8
5 5
6
8
(22) Once you have soldered all the wires from the front panel jacks to their mating
circuit board pads, then carefully inspect your work to make sure there are no short
circuits, solder bridges, or unsoldered connections.
(23) Slide six green LEDs through the front panel LED cutout holes so that their leads
pass into the mating holes on the circuit board marked DS301, DS302, DS303, DS304,
DS308, and DS309. Do not solder the LEDS yet.
IMPORTANT: The flat side of the
LEDS (the short lead) goes down, as shown on the silkscreened legend.
(24) Similarly, insert two yellow LEDs into DS306 and DS307. Do not solder the LEDs,
and be sure the flat side is down.
(25) Insert two red LEDs into DS305 and DS310 (flat side down). Do not solder the
LEDs.
(26) Snap the LED plastic mounting bezels into their holes on the front panel, taking care
not to let any of the LEDs slip out of their circuit board pads.
(27) Slide the body of the LEDs into the back of the LED bezels until they click into
place. Use a small flat-blade screwdriver to nudge the LEDs into the bezels. Once you
have verified that each LED is seated in its bezel, and that each bezel is pushed flat
against the panel, solder all the LEDs to the circuit board.
Hint: if you have trouble
getting the LEDs to snap into the bezels, try bending the plastic tabs on the bezels out
slightly, using a small-blade screwdriver.
(28) Plug the PIC16C54 preprogrammed IC into the 18-pin IC socket at U301. Wear a
grounded wrist strap or touch a grounded surface to avoid damaging U301 with static
electricity.
IMPORTANT: Be sure to align the notch on U301 with the silkscreened notch
on the circuit board.
Make sure none of the IC pins are bent and that all fit into the mating
holes in the socket.
Hint: bend the pins on U301 inward slightly by pressing the IC pins
against a flat surface. This will make the IC easier to install.
