BenQ Q7T3-FP737S Service Manual page 128

Q7T3 (CPT panel) LCD Monitor Service Guide
A-4.) Inverter diagram:
1.
Block Diagram:
15Vin
ON/OFF
BRT_ADJ
2. General Specification
Input Voltage: 15V
Input Current: 2A max.
ON/OFF Voltage: 3.3V
PWM Duty: 3.3V/47KHz
Output Requirement:
Max. Output Current: 15mA
Min. Output Current: 6mA
Lamp Working Voltage: 600Vrms
Open Lamp Voltage: 1700Vrms
Frequency: 50KHz
ON/OFF OSCILATOR
switching CIRCUIT
PWM CONTROLLER
TL1451 CIRCUIT
Circuit Operation Theory
TRANSFORMER
PROTECTION
AND DETECT
CCFL
8