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Slide #80
12 Blinks Error Code
Sound processing and adjustments are performed by IC24510. The 4 channels PWM audio output of
the IC is applied to the 2 audio power amplifiers (IC22301 and IC22302). The PWM signals of the
power amplifiers are output to the right and left channel speakers for sound reproduction.
D22017 monitors the audio power amplifier ICs (IC22301 and IC22302) for excessive current drain. If
any of the 2 ICs or one of the speakers develops a short circuit, a high is output to turn on Q22022.
When Q22022 is on, a high is applied to pin 27 of the System MPU (IC21100) triggering an SOS
condition. Then unit shuts down and the power LED blinks 12 times.
A short circuit of the 15V line causes the diode D22014 to go into conduction. The base voltage of
Q22022 becomes low and a high is output to pin 27 of IC21100 triggering a 12 blinks SOS condition.
27
Содержание Viera TC-P54Z1
Страница 12: ...Slide 12 Connection ...
Страница 15: ...Slide 15 Wireless Setup ...
Страница 17: ...Slide 17 Devices LEDs Sequence at Power On Wireless Connection Reception Status LEDs ...
Страница 19: ...Slide 19 Board Layout and Description ...
Страница 20: ...Slide 20 Display Unit Board Layout ...
Страница 21: ...Slide 21 Boards Layout ...
Страница 22: ...Slide 22 Board Name and Location Display Unit ...
Страница 24: ...Slide 24 Signal Flow ...
Страница 26: ...Slide 26 TO DISPLAY UNIT TUNER BOX FRONT VIEW TUNER BOX REAR VIEW Digital Signal Processing Tuner Box ...
Страница 28: ...Slide 28 Display Unit Digital Signal Processing Wired ...
Страница 33: ...Slide 33 Wireless Connection ...
Страница 34: ...Slide 34 Wireless Connection ...
Страница 36: ...Slide 36 Start up Operation ...
Страница 38: ...Slide 38 Voltages Distribution ...
Страница 45: ...Slide 45 F 15V SUB Voltages Distribution ...
Страница 48: ...Slide 48 Panel Drive Start up Circuit ...
Страница 50: ...Slide 50 Panel Drive Voltages Distribution P15V Distribution P5V Distribution ...
Страница 51: ...Slide 51 Vsus Distribution ...
Страница 52: ...Slide 52 Vda Distribution ...
Страница 53: ...Slide 53 Display Unit Connectors Location ...
Страница 57: ...Slide 57 Display Unit SOS Detect Block Diagram ...
Страница 62: ...Slide 62 P15V Distribution ...
Страница 64: ...Slide 64 P3 3V Distribution ...
Страница 65: ...Slide 65 P3 3V Distribution Detailed ...
Страница 68: ...Slide 68 P5V Distribution ...
Страница 72: ...Slide 72 Troubleshooting 8 Blinks Error Code ...
Страница 75: ...Slide 75 10 Blinks Error Code ...
Страница 77: ...Slide 77 Fan Drive Circuit ...
Страница 79: ...Slide 79 Fans Location ...
Страница 81: ...Slide 81 Service Mode The Tuner box and The Display unit have individual service modes ...
Страница 93: ...Slide 93 The End ...