Kenwood TM-521E - Manual (Page 20)

6. OPTIONAL ACCESSORIES
Note:-----------------------------------------------------------------------------
Some optional accessories may not be available in
your area.
6-1. TSU-5 PROGRAMMABLE TONE
DECODER UNIT
(TM-221A/321A/421A/521A only)
Caution:------------------------------------------------------------------------
1. Before removing the top cover, turn the power
supply and radio POWER switches off, and
disconnect the Power Cable.
2. Do not pinch wiring when closing the cover.
Installation
1. Loosen the four screws on both the right and left
sides.
2. Remove the four screws attaching the top cover.
Remove the top cover and set aside.
3. Temporarily set the speaker aside.
4. Remove the jumper as shown in the illustration.
5. Connect the 7-pin connector to the TSU-5 as
shown in the accompanying illustration.
6. Install the TSU-5 using the two screws provided.
7. Route the 2-pin connector attached to the
TSU-5 as shown in the accompanying illustra­
tion, and attach it to the same plug that the
jumper wire was removed from in step 3.
8. Replace the speaker. Make sure that the chassis
fits in the guides on the back of the speaker
assembly.
9. Attach the top cover using four screws.
10. Tighten the four side screws.
6-2. MC-43S HAND MICROPHONE (8-pin)
Caution:-------------------------------------------------------------------------
Some of the early versions of the MC-43S UP/DWN
Microphone were delivered with a wire connected
between the microphone hook and pin number 6
(six) of the microphone connector.
This wire is used on some foreign transceivers and
must be disconnected before the microphone can be
used with the TM-221/421/521 series and TM-
321A radios. If you connect this microphone to the
TM-221/421/521
series and TM-321A before
checking for this wire there is a possibility that you
may experience erratic display or operation of the
TM-221/421/521
series and TM-321A by static
discharge.
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