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World of Ham Radio 1997
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WOHR97_AmSoft_(1997-02-01).iso
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asb1031.txt
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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 # 1031
MODEL: SMC-34
SUBJECT: Distorted/muffled transmit audio
Symptom: Transmit audio from the SMC-34 sounds distorted or muffled
as compared with the audio provided by the transceivers own microphone.
Corrective Action:
Replace the front case of the microphone, add a cushion inside the
microphone well and change the plastic sheet inside the microphone well.
Parts Required:
Quan. Description Kenwood Part No. Circuit Description
1 Front Case A02-1696-18 NA
1 Cushion G13-1397-08 NA
1 Sheet G11-0692-08 NA
Procedure:
1. Remove the three small black Phillip's head screws from the rear of the
speaker microphone.
2. Carefully remove the back cover. The Lock Switch lever and the PTT lever
can now be removed.
3. Remove the volume control knob by pulling straight away from the case.
4. Remove the two small black Phillip's head screws that secure the PC Board
assembly to the front case of the microphone. You can now gently lift the
PC Board assembly straight up and away from the front case.
5. Remove the packing, screen, and sheet from the front case of the speaker
microphone.
6. Insert the cushion, sheet, screen and backing as shown in the accompanying
illustrations.
7. Reverse steps 1 - 4 to reassemble the unit.
Note: Carefully remove the rubber gasket from the old front case and
position it in the new front case groove before replacing the rear case
Time required for this modification is .5 hours or less.
Service code A:11 B:20 C:Add D:91
------------- PC Borad
--- Mic Element
--- "Donut" Packing
Cross Section --- Screen
View --- Sheet (G11-0692-08
--- Cushion (G11-0692-08)
------------------ Front Case (A02-1696-18)