Service BulletinAmateur Radio Division

Subject: TM-732A - Low Cross-band Repeat AudioDate: May 3, 1993

Improper DTMF operation and low microphone audio have been reported by several owners of the TM-732A when the units are operated in the Cross-band repeat mode.

Parts Required:

Kenwood Part No.
Circuit Reference
1 39 Kohm chip resistor RK73FB2A393J R468
1 .01 uF chip capacitor CK73FB1E103K C453

  1. Detach the front panel assembly from the chassis.
  2. Remove the top and bottom covers from the chassis.
  3. Remove the small countersunk Phillips head screws from the sides of the chassis. These are used to secure the two brackets that holds the plastic front cover to the chassis. Gently pull the plastic cover assembly forward and remove it from the chassis.
  4. The TX/RX Control unit should now be visible on the front of the chassis assembly.
  5. Replace R468 and C453 shown in the accompanying diagram.
  6. Reverse steps 1 through 3 to reassemble the radio.
No additional adjustments or modifications will be required.
This modification requires soldering equipment rated for CMOS type circuits. It also requires familiarity with surface mount soldering techniques. If you do not have the proper equipment or knowledge do not attempt this modification yourself. Seek qualified assistance.

Time required for this modification is 30 minutes or less. Service code A:35 B:X57-4000-C/4 C:R468/C453 D:91

©5393 by CLM for Kenwood U.S.A (E51-93-005)