- 62 -
Service manual WP 895/895F, CP885/885F, CP485F
5-10 TV start-up, TV normal run and stand by mode operations
5-10-1 TV start-up operations
* Schematic diagram for start-up operations
* TV start-up and microcontroller initialisation
- When SW801 power switch is pushed, main AC voltage is applied to T801 transformer (after rectification by D801...
D804 diodes). Then, T801 SMPS transformer starts operating and supplies DC voltage to I823 (5V regulator) and
- There regulators provide 5V / 3.3V DC voltage to I501 microcontroller power supply pins (pin 3 / pin 54) and to the
reset pulse circuit which provides reset pulse to I501 microcontroller reset pin (pin 58).
- Then, the microcontroller starts its initialisation. Its power pin (pin 1) is set to high which allows delivery of power
supply voltages (123V~143V, 8V, 5V...). At this step, all IC’s start working but no picture appears on screen: I501 IC
doesn’t provide horizontal drive voltage.
- Then, the microcontroller consults I702 EEPROM via I2C bus to know the last TV set mode (normal run mode or
stand-by mode ) before switching off.
to 3.3v Regulator circuit.
Содержание WP-895
Страница 33: ...32 Service manual WP 895 895F CP885 885F CP485F Block diagram TDA8944J...
Страница 36: ...35 Service manual WP 895 895F CP885 885F CP485F...
Страница 38: ...37 Service manual WP 895 895F CP885 885F CP485F Block diagram TDA6107Q...
Страница 43: ...42 Service manual WP 895 895F CP885 885F CP485F 5 Circuit description 5 1 Block diagram...
Страница 61: ...60 Service manual WP 895 895F CP885 885F CP485F 5 9 2 2 STR F6654 oscillating operation...
Страница 67: ...66 Service manual WP 895 895F CP885 885F CP485F...
Страница 87: ...Service Manual WP 895 895F CP885 885F CP485F 86 7 Exploded View 7 1 DWX 28W5...
Страница 88: ...Service Manual WP 895 895F CP885 885F CP485F 87 7 Exploded View 7 2 DWF 28W8...
Страница 89: ...Service Manual WP 895 895F CP885 885F CP485F 88 7 Exploded View 7 3 DTF 29U8...
Страница 90: ...Service Manual WP 895 895F CP885 885F CP485F 89 7 Exploded View 7 4 DTP 28A7...
Страница 91: ...Service Man ual WP 895 895F CP885 885F CP485F 90 7 Exploded View 7 5 DTP 28B1...
Страница 92: ...Service Man ual WP 895 895F CP885 885F CP485F 91 7 Exploded View 7 6 DTP 28G7...
Страница 93: ...Service Manual WP 895 895F CP885 885F CP485F 92 7 Exploded View 7 7 DTP 28G8...
Страница 94: ...Service Manual WP 895 895F CP885 885F CP485F 7 8 DWF 28W9 93 7 Exploded View...
Страница 95: ...94 Service Manual WP 895 895F CP885 885F CP 485F 7 9 DTB 21U7 7 Exploded view...
Страница 96: ...SCHEMATIC DIAGRAM WP 895 CP 885...
Страница 97: ...SCHEMATIC DIAGRAM WP 895F CP 885F...
Страница 98: ...SCHEMATIC DIAGRAM CP 485F...
Страница 99: ......
Страница 100: ......
Страница 101: ...CP 485F...
Страница 102: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC...