![background image](http://html1.mh-extra.com/html/viewsonic/vg910b-1/vg910b-1_service-manual_1021237023.webp)
5.1 General.
1. All specification must be met over line voltage range of 90V
AC
to 264V
AC
50Hz / 60Hz, unless otherwise
specified.
2. Operating temperature range is 0
o
C to 40
o
C with a relative humidity of 10% or less to 80%.
3. The monitor must be operational in a usable state within 30 minutes after turn-on.
4. All signal levels are measured assuming termination at the monitor’s input jacks or in its characteristic
impedance.
5. All controls must have excess range (no control may be left at an end stop when proper alignment is
completed).
6. The monitor is not required to meet specs during the following but must tolerate, without damage to the LCD
or circuits, any sequence or combination of power on and off, signal on and off, erratic, wrong frequency or
noisy inputs while at any possible unplugging of power or signal, settings of user accessible controls likewise,
the monitor should survive extended periods of operation with line voltage reduced below the specified
minimum.
7. An isolation transformer should be used when performing alignment and tests, Portions of the power supply
board are hot ground, The remaining boards are cold ground.
8. Ambient condition:
8.1 Illumination: In usual inspection of electric performance and mechanical performance, it sh
a
ll be 150 ~
260lux.
8.2 Environmental noise: Less than 60dB.
8.3 Interference of EMI: The inspection shall be carried out in the place where a set is not disturbed by
external unnecessary electric wave and magnetic field.
8.4 Temperature: 24 ± 2
o
C.
8.5 Humidity: 65 ± 20%.
5. Adjusting Procedure
20
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG910s/b
Summary of Contents for VG910b-1
Page 30: ...6 6 Figure of Waveform 27 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 31: ...28 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 51: ...48 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 52: ...49 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 53: ...50 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 55: ...52 ViewSonic Corporation Confidential Do Not Copy VG910s b 10 Schematic Diagrams ...
Page 56: ...53 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 57: ...54 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 58: ...55 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 59: ...56 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 60: ...57 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 61: ...58 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 62: ...59 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 63: ...60 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 64: ...61 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 65: ...62 ViewSonic Corporation Confidential Do Not Copy VG910s b 11 PCB Layout Diagrams Main Board ...
Page 66: ...63 ViewSonic Corporation Confidential Do Not Copy VG910s b Main Board ...
Page 67: ...64 ViewSonic Corporation Confidential Do Not Copy VG910s b Power Board ...
Page 68: ...65 ViewSonic Corporation Confidential Do Not Copy VG910s b Control Board ...