Test) - Ramsey Electronics FX Series Manual

M36: D22, near VR1, type 1N914 or 1N4148. Orient the banded end
correctly. (+8T through R107 and D22 turns on Q6 to mute the audio amp
IC during transmit).
M37: C62, near R105, .001 uf.
M38: Diode D5, near R35, type 1N914 or 1N4148.
M39: R31, near D5, 47K (yellow-violet-orange).
M40: R33, also 47K (yellow-violet-orange).
M41: R70, near diode matrix, 1K (brown-black-red).
M42: Install the LED transmit indicator, D17, correctly identify the anode
side lead which is the longer of the two. Install the LED with full lead length
extending above board so that the LED can be positioned in the front panel
hole.
M43a. Referring back to Section A if needed, prepare two 8" wires ( or 8"
of 2 conductor wire) and solder one end of each to IN and GND (MIC)
between C86 and U1.
M43b. Study microphone jack J4 and the above drawing. Solder the other
two wire ends to the jack lugs as shown.
STAGE M PROGRESS TEST
1. Check the PC board for wire scraps, untrimmed leads, etc.
2. Connect an ICOM compatible speaker-microphone to the Mic jack.
3. Connect DC power, antenna and speaker.
4. Turn the power switch 'ON' and verify that receiver still works properly.
5. Select a steady signal or turn the squelch control so that the
background noise is audible.
6. Press the microphone button: the TX LED should light, and the
receiver should be silenced.
7. Touch a wire from ground to pin 3 of the Packet I/O jack. Do the same
with any resistor that is 47K or lower. Either way, you should get the
same results as in Step 6.
8. Disconnect the DC Power.