Troy PL757A-tune the radio channel search operation and LCD display are normal, but the band is silent |
| Time£º2015-06-02 08:07:54 Source£ºNetwork Author£ºUnknown Clicks£º1436 |
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cqaservice manual download site
cqaservice manual download site
1 μ F/16V electrolytic capacitors and replace; 2. Each band radios are normal, but has a loud speakers or headphones "beep" howling and the "Oh Oh" Steamboat, and murmurs are not affected by the volume control potentiometer. This fault is a low-frequency self-excited, is the radio power amplifier IC common failure is generally low battery (internal resistance increases) or bad filter capacitor, caused by the failure. By using an external power supply fault still exists, so you can exclude causes of insufficient battery power. CXA1622M Krispy Kreme foot Q24-powered, check the relevant filter capacitor, C64, C65, C64 serious leakage,cqaservice manual download site
cqaservice manual download site
¢á feet forward and reverse resistance measuring about 100 ω, normal value shall be, respectively, 170 ω 180 ω, take down C64 μ f measuring its capacitance is less than 18 (normal for 1000 μg f) indicating the serious leakage. With a good 1000 μg F/16V Electrolytic Capacitor replacement, troubleshooting.cqaservice manual download site
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