Tait International Limited TPDHKC ユーザーズマニュアル

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 Troubleshooting  171
Cleaning the contacts of the battery
Notice  Do not scratch or scrape the contacts of the 
battery. If necessary, wipe the contacts of the battery 
with a dry, lint-free cloth to remove any dirt, oil or 
grease.
Cleaning the radio
If you need to clean the radio case, use a cloth 
dampened with clean water.