ASB-1059
Service BulletinAmateur Radio Division

Subject: TS-450S - Noisy EncoderDate: July 7, 1994

Symptom:
When tuning the Main Encoder of the TS450S/690S with bare hands you may encounter a "scratching" noise in the speaker if an antenna with a high SWR is used. If gloves are worn no problem is encountered. This occurs because the shaft of the encoder is not grounded.

Countermeasure:
Replace the Main Encoder with one that has a gounded shaft.

Parts Required:
Qty
Description
Part No.
1 Main encoder W02-1836-05
2 Mounting Screws N90-3006-46

Note: You must use the new mounting screws listed above with the replacement encoder.

Time required for this modification is 30 minutes or less. Service code A:09 B:20 C:185 D:91


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