Symptom:
Transmit audio from the SMC-34 sounds distorted or muffled as compared with the audio provided by the transceiver own microphone.

Corrective action:
Replace the front of the microphone, add a cushion inside the microphone well and change the plastic sheet inside the microphone well.

Parts required:

Qty   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 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 Phillips'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 hour or less.