4.1 Power supply (DC/DC Converter):
4.1.1
IC251 BA9741 is a switching regulator controller that uses a PWM method. It is used for DC to DC
step-down conversion. It converts 24V DC into regulated and stable output voltages of 18V and 5V.
4.1.2
Regulator:
IC252 converts 5V into regulated and stable O/P 3.3V.
IC253 converts 5V into regulated and stable O/P 1.8V.
IC255 converts 5V into regulated and stable O/P 3.3V.
IC256 converts 5V into regulated and stable O/P 2.5V
4.2 DDC data select:
4.2.1
IC601 (AT24C02) saves D-SUB DDC data.
4.2.2
IC604 (AT24C02) saves DVI-D, DDC data.
4.2.3
IC605 (AT24C02) saves DVI-A, DDC data.
4.3 D-sub and DVI-A signal select
The VP231wb is equipped with two analog signal inputs: D-sub and DVI-A. The user may only choose
to display the signal from one of these ports: D-sub or DVI-A.
IC607 (AD8186) is a R, G, B signal switch IC. If the control signal (RGBSEL) is high, the device will
display the DVI-A signal. If the control signal (RGBSEL) is low, the device will display the D-sub signal.
4.4 Scalar
The gm1601H is a dual channel graphics and video processing IC for Liquid Crystal Display (LCD) monitors and
televisions incorporating Picture in Picture, up to WUXGA output resolutions. The gm1601H provides all key IC
functions required for image capture, processing and display timing control. On-chip functions include a high
speed triple-ADC and PLL, Ultra-Reliable DVI receiver, high quality zoom, and shrink scaling engines, Motion
Adaptive De-interlacing (MADI), Low Angle Diagonal Interpolation (LADI), an on-screen display (OSD)
controller, a 100MHz on-chip X186 micro-controller (OCM), and a selectable double side TTL or dual channel
LVDS transmitter for interface to displays.
4.5 USB(VP201s/b
only)
IC951(USB20H04) is a 4-Port USB 2.0 Hub controller. It is compliant with the USB 2.0 specification,
enables bus-powered Hi-Speed hub design, and is compatible with On-The-Go (OTG) USB devices.
It is equipped with a serial interface for configuration from EEPROM or micro-controller when the default
settings are not used. Includes integrated termination and pull-up/pull-down resistors, as well as internal short
circuit protection of DP and DM lines. Supports individual or gangedover-current protection and power control.
4. Circuit Description
19
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VP2000s
Содержание VLCDS26064-4W
Страница 27: ...5 3 6 Click Gprobe 4 24 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 28: ...25 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 29: ...5 3 7 Connect ISP Tool 26 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 32: ...Connect to D Sub Signal cable 29 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 33: ...5 3 8 Confirm connection setup Gprobe setting 30 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 35: ...32 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 36: ...5 3 9 Open VP2000BATCH 33 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 37: ...5 3 10 Key in BATCH VP2000BATCH TXT 34 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 38: ...5 3 11 Press Enter key 35 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 54: ...8 Exploded Diagram and Spare Parts List 51 ViewSonic Corporation Confidential Do Not Copy VP2000s ...
Страница 56: ...9 Block Diagram 53 ViewSonic Corporation Confidential Do Not Copy VP2000s ENABLE ...
Страница 57: ...10 Schematic Diagrams 54 ViewSonic Corporation Confidential Do Not Copy VP2000s Power Board ...
Страница 58: ...55 ViewSonic Corporation Confidential Do Not Copy VP2000s Main Board ...
Страница 59: ...56 ViewSonic Corporation Confidential Do Not Copy VP2000s Main Board ...
Страница 60: ...57 ViewSonic Corporation Confidential Do Not Copy VP2000s Main Key Board ...
Страница 61: ...58 ViewSonic Corporation Confidential Do Not Copy VP2000s Power Board ...
Страница 62: ...59 ViewSonic Corporation Confidential Do Not Copy VP2000s Inverter Board ...
Страница 63: ...11 PCB Layout Diagrams 60 ViewSonic Corporation Confidential Do Not Copy VP2000s Main Board ...
Страница 64: ...61 ViewSonic Corporation Confidential Do Not Copy VP2000s Main Board Bottom ...
Страница 65: ...62 ViewSonic Corporation Confidential Do Not Copy VP2000s Power Board ...
Страница 66: ...63 ViewSonic Corporation Confidential Do Not Copy VP2000s Power Board Bottom ...
Страница 67: ...64 ViewSonic Corporation Confidential Do Not Copy VP2000s Inverter Board ...
Страница 68: ...65 ViewSonic Corporation Confidential Do Not Copy VP2000s Inverter Board Bottom ...