![background image](http://html1.mh-extra.com/html/viewsonic/va1721wmb-17-lcd-monitor/va1721wmb-17-lcd-monitor_service-manual_1020659020.webp)
- 20 –
ViewSonic Corporation
Confidential - Do Not Cop
VA1721wmb
OZ9938GN(IC801):
The OZ9938 is high performance, cost-effective CCFL controller
designed for driving large-size LCD applications requiring 2 to 6 CCFLs.PWM
control, Has such functions as short-voltage protection, Over-voltage protection,
over-current protection and etc. The function of each pin and the circuit diagram
inside are as follows
:
PIN Descriptions:
Pin Names
Description
1 DRV1
Drive
output
2
VDDA
Supply voltage input
3
TIMER
Timing capacitor to set striking time and shutdown delay time
4 DIM
Analog dimming or Internal LPWM dimming or external PWM pulse
input for dimming function
5 ISEN
Current
sense
feedback
6
VSEN
Voltage sense feedback
Summary of Contents for VA1721wmb - 17" LCD Monitor
Page 22: ...22 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Block Diagram...
Page 36: ...36 ViewSonic Corporation Confidential Do Not Cop VA1721wmb...
Page 38: ...38 ViewSonic Corporation Confidential Do Not Cop VA1721wmb...
Page 41: ...41 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 5 7 Packing Procedure...
Page 42: ...42 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 6 Troubleshooting Flow Chart...
Page 56: ...56 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Packing For Shipping...
Page 60: ...60 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Picture 19...
Page 61: ...61 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 10 Block Diagram...
Page 71: ...71 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 12 2 MAIN BOARD PCB BUTTON VIEW...
Page 72: ...72 ViewSonic Corporation Confidential Do Not Cop VG1721wm VA1721wm 12 3 POWER PCB TOP VIEW...
Page 73: ...73 ViewSonic Corporation Confidential Do Not Cop VG1721wm VA1721wm 12 4 POWER PCB BUTTON VIEW...
Page 75: ...75 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 12 7 POWER PCB TOP BUTTON VIEW Q...