1. Ambilight™ 2K6 Pieter Risseeuw January 2006

2. High-End TV, Pieter Risseeuw2 The converter boards: Double stuffed converter board For sets with 3 or 4 sided Ambilight  Can drive 2 lamp units (6 lamps) Single stuffed converter board For sets with 2 sided Ambilight  Can drive 1 lamp unit (3 lamps)

3. High-End TV, Pieter Risseeuw3 Ambilight  converter board Ballast capacitor Lamp unit Reflector

4. High-End TV, Pieter Risseeuw4 Building blocks of converter board: µ Processor PWM out +12Va +12Vb (12-13V) Inverters Lamp unit A Lamp unit B I²C +5V Stab. +12Va Board select Protection

5. High-End TV, Pieter Risseeuw5 Lamp unit A is supplied by 12Va Lamp unit B is supplied by 12Vb (12-13V) µProcessor is supplied by 12Va Supply connectors in parallel to supply multiple boards If only 12Va is available, lamp unit B will not work! Power supply of Ambilight™

6. High-End TV, Pieter Risseeuw6 Power supply of Ambilight™

7. High-End TV, Pieter Risseeuw7 Cabling 3 side Ambilight™ 2 side Ambilight™

8. High-End TV, Pieter Risseeuw8 Functions of µProcessor Dimming of Ambilight™ by PWM Translation of I²C to PWM Protection of Ambilight™ board (in case of protection only the lamps switch off, no set protection)

9. High-End TV, Pieter Risseeuw9 I²C Communication and address double stuffed board In 2K5 application per lamp unit one address In 2K6 application only one address for all lamp units - Address is 6A (hex) -18 data bytes - 3 bytes used for one lamp unit. Board connected to 1M59 (Pin 4 and 5 to gnd) Board onnected to 1M49 (Pin 4 to gnd) Board connected to 1M39 Lamp unit ALamp unit BLamp unit ALamp unit BLamp unit ALamp unit B Received by One double board Time 18 data bytes Received by One double board Received by One double board

10. High-End TV, Pieter Risseeuw10 I²C Communication and address single stuffed board In 2K6 application only one address for all lamp units - Address is 6A (hex) - 6 data bytes - 3 bytes used for one lamp unit. Board connected to 1M59 (Pin 4 and 5 to gnd) or 1M39 Board connected to 1M49 (Pin 4 to gnd) Lamp unit A Time 6 data bytes Received by One single board Received by One single board

11. High-End TV, Pieter Risseeuw11 I²C PWM Pinning 1M59: 1= Clock 2= GND 3= Data 4= Board select a 5= Board select b

12. High-End TV, Pieter Risseeuw12 Principle of Royer converter Self oscillating converter (frequency is ±63KHz) 6 converters on one double stuffed board Inverter switched ON and OFF with two transistors for PWM Max duty cycle of one lamp is 33% (limited by µProcessor) Transistor to switch on and off PWM of µProcessor Drive mosfets (self oscillating)

13. High-End TV, Pieter Risseeuw13 Service mode of converter board In normal operation the lamps are OFF after power up (needs I²C to switch on the lamps). Service mode by short circuiting jumper 0101 (disconnect 1M59 and 1M49). After power up the lamps will switch ON. Jumper 0101

14. High-End TV, Pieter Risseeuw14 Protections Parallel arcing protection -In normal operation inverter frequency is ±63KHz -In case of short circuit of the transformer output the frequency is >100KHz. -Protection by sensing the switching frequency Serial arcing protection -Detection of arc in ground wire of lamp units -Protection pulse transmitted via opto-coupler µProcessor is counting protection pulses. 50 pulses within 2 seconds needed for protection. No set protection, only Ambilight™ board will switch OFF. Disable protections by short circuiting diode 6112 or capacitor 2173 or connect pin 8 of µP 7003 to ground.

15. High-End TV, Pieter Risseeuw15 Parallel arcing protection +12V Comparator Frequency detection

16. High-End TV, Pieter Risseeuw16 Serial arcing protection Diode 6206 for over current protection Arc detection with 2 beads Resistors for opto-coupler supply. Mosfet to switch opto-coupler.

17. High-End TV, Pieter Risseeuw17 Repair tips