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TS-430S RECEIVER REPAIR

Kenwood TS-430S Low Receiver Sensitivity Repair. October 2021


Overview of non-invasive Kenwood TS-430S Low Receiver Sensitivity Repair.

 

Low or intermittent receive on the TS-430S radio may be caused by a poor contact on one or more of the LPF (Low Pass Filter) relays. In most cases the following procedure will correct this problem without having to clean or replace the relays. The procedure requires the cleaning of the contacts by passing a relatively high current thru them (about 500mA) to burn off any oxidation/contamination from the contacts. 

This procedure is based on Kenwood TS-430S Service Bulletin - ASB-0902 INTERMITTENT RX

 

2 x 56ohm 5W Ceramic resistors wired in parallel.

 

2     Apply 13.8VDC to the antenna terminal thru a 28ohm, 10W resistor for approximately 1 minute while pressing and hold the ‘UP’ band-switch of the TS-430A (ensure the 1 MHz switch is ON). This will cycle thru all the filter relays and burn any oxidation/contamination from the contacts. If using the same power supply ensure the positive of the supply is connected to the centre of the antenna connector.

 

If using the same power supply ensure the positive of the supply is connected to the centre of the antenna connector.

 

Refer: KENWOOD, TS-430S SERVICE BULLETIN - ASB-0902 INTERMITTENT RX

 

Video of non-invasive Kenwood TS-430S low receiver sensitivity Repair

 

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Page last revised 24 November, 2021
 

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