ViewSonic VS12335-2M, Service Manual

Page: 42 / 102

7. DTV FUNCTION TEST
Both NTSC and ATSC system were mixed together. At this point in tuner to the joints on the need
for 'AIR NTSC and ATSC 2 both systems were mixed with the signal
Both CATV and DIGITAL CABLE two systems are mixed together. At this point in tuner to the
need for a joint 'CATV and DIGITAL CABLE two systems are mixed in a the signal
8. YPbPr, S-VIDEO, AV, TV, DTV’S FUNCTION TEST
A. Input YPbPr, S-VIDEO, AV , TV, DTV’S signal and check.
B. Input USA air channel (TABLE 1) and USA CATV channel for TV channel.
Under YPbPr MODE, Make sure the 408i, 480P, 720P, 1080i,1080p is right.
9. USB mode FUNCTION TEST
A. Insert a USB flash memory which has .avi movies and .jpeg photos inside for testing.
Make sure the “MOVIE” function works normally in video and audio.
B. Choose the “PHOTO” function from the USB menu and select a 100 IRE color bar pattern to
make sure to the colors and brightness are right.
C. Choose the “SET UP” function and press the “Defult” item on the bottom before quit if any
set up function is changed while testing.
10. AUDIO FUNCTION TEST
A. Audio input includes PC AUDIO IN, S-VIDEO/AV AUDIO IN and YPbPr/DVI AUDIO IN.
B. Under PC MODE, input PC AUDIO signal, checks whether the action of AUDIO IN is right.
C. Under S-VIDEO/AV MODE, input L/R AUDIO signal, checks whether the action of AUDIO
IN is right.
D. Under YPbPr MODE, input L/R AUDIO signal, checks whether the action of AUDIO IN is
right.Under HDMI MODE, checks whether the action of AUDIO IN is right Under TV MODE,
checks whether the action of AUDIO IN is right.
E. In DTV mode, the input signal ATSC, confirmed AUDIO LANGUAGE and the normal
movements PARENT
11.Under PC MODE, input PC AUDIO signal, determines whether the action of INT SPEAKER
output is right. Meets earphone with the EARPHONE, Determined whether the action of
EARPHONE output is normal.
12.DDC EDID confirm
VGA EDID confirm
By P502 VGA CONNECTOR DOWNLOAD EDID confirm whether normal or not
HDMI EDID confirm
By P501 HDMI CONNECTORS DOWNLOAD EDID confirm whether normal or not
13.All Modes Reset
After final QC step, we must to erase all saved changes again and restore the factory defaults.
You should do “memory recall ” again.
Turn off the LCD TV by pressing “Power” button
14.BURN IN Mode access methods
Key Pad followed by pressing the "MENU" + "INPUT" 2 KEY, entered BURN IN mode
15.DCR function confirm In all source. (VTMS2431M model only)
A. DCR turn ON.
B. Input full white pattern then measure the luminance. For example Value A
C. Input full dark pattern the measure the luminace. For example Value B
D. These two value ratio must be more than 10000. (A/B).
ViewSonic Corporation
Confidential - Do Not Copy VTMS2431
39