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- 22 –
ViewSonic Corporation
Confidential - Do Not Copy
VG720
TL1451 (IC201):
PWM control, voltage range for working: 3.6~35V, 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 Symbol
Description
Pin Symbol
Description
1
CT
External timing capacitor 9
VCC
Power
supply
2
RT
External timing resistor
10
2OUT
Output 2
3
1IN+
Positive input for error amplifier 1
11
2DTC
Output 2 dead time/soft start setting
4
1IN-
Positive input for error amplifier 2
12
2FBK
Error amplifier 2 output
5
1FBK
Error amplifier 1 output
13
2IN+
Positive input for error amplifier
6 1DTC
Output 1 dead time/soft start
setting
14
2IN-
Positive input for error amplifier
7
1OUT
Output 1
15
SCP
Timing latch setting
8
GND
Ground
16
REF
Reference voltage output (2.5v)
Summary of Contents for VG720 - 17" LCD Monitor
Page 37: ...37 ViewSonic Corporation Confidential Do Not Copy VG720 Sep2 Inpute the S N and execute Enter...
Page 38: ...38 ViewSonic Corporation Confidential Do Not Copy VG720...
Page 39: ...39 ViewSonic Corporation Confidential Do Not Copy VG720 Sep3 Key the Enter and write the data...
Page 41: ...41 ViewSonic Corporation Confidential Do Not Copy VG720 5 7 Packing For Shipping...
Page 43: ...43 ViewSonic Corporation Confidential Do Not Copy VG720 6 Troubleshooting Flow Chart...
Page 62: ...62 ViewSonic Corporation Confidential Do Not Copy VG720...
Page 63: ...63 ViewSonic Corporation Confidential Do Not Copy VG720...
Page 80: ...80 ViewSonic Corporation Confidential Do Not Copy VG720 12 2 MAIN BOARD PCB BUTTON VIEW...
Page 82: ...82 ViewSonic Corporation Confidential Do Not Copy VG720 12 5 POWER PCB TOP VIEW...
Page 83: ...83 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 POWER PCB BUTTON VIEW...
Page 84: ...84 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 AUDIO PCB TOP VIEW...
Page 85: ...85 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 AUDIO PCB BUTTON VIEW...