Model:         UX-49A 900 series band unit       REVISED 11-15-89

 Division:      Amateur

 Note:          This service bulletin is meant for technical per-
                sonnel with experience working on solid state com-
                munications equipment.  Damage caused by im-
                properly installing this modification may cause
                ICOM to charge for subsequent repairs to the
                product.  ICOM does not warrant this modification.

 Bulletin #:    8215-001

 Date:          August 2, 1988

 Subject:       Improve PLL lock up time

 Information:   The PLL lock up time on some units is not quick
                          enough for all types of receivers.  The
                          problem may be worse when CTCSS is used.
                          Operation will appear near normal when
                          the UX-49A is operated in simples mode
                          with no CTCSS.

 Procedure

  1.  Remove the top and bottom covers.

  2.  Remove the main board and replace the following components:

      Current        New                      ICOM
      Part           Part                     P/N

      C87            .1uf 35 VDC tantalum     918-01670
      C97            10uf 16 VDC tantalum     918-01679
      R60            100 K 1/8 watt           915-01124
      R49            2.2 K 1/8 watt           915-01105

  3.  Add a 2.2 uf 16 VDC tantalum (ICOM P/N 918-01674) from the
      collector of Q15 (positive lead) to the adjacent ground
      (toward the edge of the board).