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World of Ham Radio 1997
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WOHR97_AmSoft_(1997-02-01).iso
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1997-02-01
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==============================================================================
K E N W O O D
>>> A M A T E U R R A D I O S E R V I C E B U L L E T I N <<<
==============================================================================
Kenwood Service Centers
Kenwood Service Corporation Kenwood Service Center, East
2201 East Dominguez Street 829 Lynnhaven Parkway, Suite 130
Long Beach, California 90801 Virginia Beach, Virginia 23452
Telephone 1-310-639-5300 Telephone 1-804-340-1702
==============================================================================
BULLETIN # 1011
MODEL: TM-732A
SUBJECT: Low Cross-band Repeat Audio
Symptom:
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:
Qty Description Kenwood Part No. Circuit Reference
1 39 Kohm chip resistor RK73FB2A393J R468
1 .01 uF chip capacitor CK73FB1E103K C453
Procedure:
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 on the foil side of X57-4000-11 C/4 Board.
These parts are between the litheum battery and the mic jack.
6. Reverse steps 1 through 3 to reassemble the radio.
No additional adjustments or modifications will be required.
Caution: 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