TN1017 - IFB R1 Audio Jack Replacement

Contents of Preassembled Kit

TN1017-AudioJackReplacement

CAUTION: Installation of this kit should be performed by a qualified technician. Malfunctions or damage as a result of improper installation of this kit are not covered by warranty.


1. Remove the receiver from the enclosure.
Remove the 2 black Phillips screws on the enclosure side nearest the front panel (Fig. 1) and carefully slide the receiver out of the enclosure. (Fig. 2)

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2. Remove the knob.

Using the small Allen wrench loosen the two knob setscrews (Fig.3), remove the knob being careful not to lose the spacer washer inside the knob hole (some knobs do not have the washer inside).

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3. Remove the knob guard.

Unscrew and remove the knob guard and the domed Bellville washer under the guard. (Fig. 4)

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4. Remove the front panel.

Remove 4 stainless Phillips head screws retaining the 2 PC boards to the front panel (Fig. 5 & 6). Separate the PC boards being careful not to bend the connecting pins. (Fig. 7)

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5. Remove the obsolete jack.

Unsolder the obsolete phone jack from the RF PC board and remove solder from the holes using solder wick or a solder sucker. (Fig. 8)

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6. Install the audio PC board to the new pre-assembled front panel.

Use 2 stainless Phillips head screws to assemble the “L” shaped audio board to the front panel. (Fig. 9)

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7. Install the RF board.

Dress the three jack leads vertical from the connector spacer insulator and feed each lead into it’s respective hole in the RF PC board. Mate the connector pins into the audio board connector strips, and install 2 stainless Phillips screws to attach the RF PC board to the panel. (Fig. 10)

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8. Solder the leads.

Dress and pull on the stereo jack leads to remove excess wire loops between the jack and the PC board, solder and trim the leads. (Be careful not to damage the 3 tiny inductor coils in the same area on the PC board). (Fig. 11)

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9. Install the knob/guard.

Place the domed Bellville washer over the knob shaft and bushing then screw on the knob guard, align the flats on the guard parallel with the length of the front panel, turn the shaft to the full CCW “OFF” position, place the tiny spacer washer inside the knob hole if it had one and put the knob on the shaft. Align the knob mark with the “OFF” position on the panel and tighten the exposed setscrew, rotate the knob and tighten the second setscrew. (Fig. 12)

Note: With the knob pushed in make sure the switch has a tactile “click” feel and that the knob does not bottom against the guard base. If it does, loosen both knob setscrews and readjust the knob slightly higher on the shaft then retighten.

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10. Install the receiver into the enclosure.

Carefully slide the unit into the case, open the battery door and with one finger move the battery partition to clear the contact assembly on the PC boards to allow the unit to slide all the way in. Install the 2 black Phillips head screws.

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11. Test the receiver.

Using a T1 or T2 transmitter test the unit with a stereo headset and a mono headset placing the mono-stereo switch on the side of the unit in the respective position for each test. If audio is not present in one or more earphones accordingly then the jack wiring should be checked.