Service BulletinAmateur Radio Division

Subject: TS-450S - Low Mic Gain w/DSP-100Date: August 9, 1993

Proper microphone gain/ALC readings cannot be obtained unless the user adjusts the TX GAIN potentiometer on the rear of the DSP-100. This irregularity is caused by an instability of the DSP-100 MIC amplifier (IC-5).

Corrective action:
Remove capacitor C200 from the IF unit on the transceiver, and replace it with R300, a chip jumper wire.

Parts required:
Kenwood Part No.
Circuit description
1 Chip jumper R92-0670-05 R300
Time required for this modification is 1 hour or less. Service code A:35 B:X48-3090 C:R300 D:91

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