Dell E173FP Service Manual - Page 17
PWPC1742LGD1, Function test - specifications
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5.3.2Power Block Diagram PWPC1742LGD1 Function test R6 CCFL R7 M3 10 Vrms METER V R8 CCFL R9 M4 10 Vrms METER V R12 CCFL R10 CCFL R11 M5 10 Vrms METER V R13 M6 10 Vrms METER V CON205 1 2 CON206 1 2 CON207 1 2 CON208 1 2 DELL E173FP Service Manual Model name : PWPC1742LGD1 PCB NO.715L1283-1 CN102 1 2 3 4 5 6 7 8 9 10 11 12 GND ON/OFF DIM 12V 5V GND GND L N CN901 AC IN M2 R2 5 V METER V R1 100 V M1 METER V R4 560 VR1 10K R5 100 Function test step : Step1 : 1. Adjust VR1 ( Set Vdim voltage from 0V to 5V) , then check M3 / M4/M5/M6 Vrms . 2. Check M3 / M4/M5/M6operating frequency. ( note 1 ) Note 1: M3 / M4/M5/M6 need to use two channel multimeter , such as FLUKE 45 , or use the oscilloscope check frequency. Specification : M1 = 12V +- 0.5V , M2 = 5V +- 0.25V 1. M3 / M4/M5/M6 = 6.5 +- 5 mV @ DIM= 5V M3 / M4 /M5/M6= 3.0 +- 5 mV @ DIM= 0V 2. M3 / M4/M5/M6= 55KHz +- 5 KHz 17