JVC LX-D1010G - Lcd Projector, Руководство по обслуживанию

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LX-D1010G
(PA012) 7-3
[A/D Preamp Circuit]
1. A/D converter input amplitude
Purpose of adjustment: To set the amplitude of the video signal being into the A/D converter.
Symptom when adjustment is incomplete: Colors are added to monochrome video.
Input signal
No. 01
XGA all white 100%
Input terminal Analog RGB
* Input adjustment commands in upper case alphanumerics.
1. Input the XGA signal (all white 100%, No.01).
2. Input [ 00~5 ](A/D adjustment command) in the Hyper Terminal window to start automatic
adjustment.
3. When adjustment is completed, the return command [ 00~5111 ] will be returned in the Hyper
Terminal window.
The bottom 3 digits of the return command indicate whether adjustment was successful or failed.
The sequence is R, G and B from the left.
‘1’ means success.
‘0’ means failure resulting from PWB malfunction, signal error, input selection error, etc.
[LCD panel drive adjustment circuit]
2. Ghost
Purpose of adjustment: To minimize ghosts on the images
Symptom when adjustment is incomplete: Ghosts with a width of 12 pixels appear in the images.
Input signal Refer to the chart below
Input terminal Analog RGB
No. Pattern
12 XGA SMTPE(R)
13 XGA SMTPE(G)
14 XGA SMTPE(B)
*1 Perform this adjustment only when the Ghosts are prominent in the video after either the
Main PWB Ass’y or the LCD Block has been replaced.
*2 Input the adjustment commands and values in upper case characters.
1. Use the following as the default values in the IMAGE MENU.
CONTRAST ------------- 0
BRIGHTNESS ---------- 0
COLOR TEMP. --------- STANDARD
COLOR MATRIX ------- OFF
Red
2. Input the XGA signal (SMTPE (R), No. 12).
3. Input the adjustment command [ 00~30C ] in the Hyper Terminal window to minimize
ghosts in the red image.
In the , input the value from among the 5 types of [ 008 ], [ 009 ], [ 00A ], [ 00B ] and [ 00C ] so that
the ghost can be reduced to a minimize value, resulting in the entirely well balanced screen
(center and periphery of four corners). (*3)
4. Input the write command [ 00~1829 ] in the Hyper Terminal window to write the changed
value to the EEPROM.
In the , enter the value of 2 figures of the lower part in the in Item 3. (*3)
Green
5. Input the XGA signal (SMTPE (G), No. 13).
6. Input the adjustment command [ 00~30D ] in the Hyper Terminal window to minimize
ghosts in the green image.
In the , input the value from among the 5 types of [ 008 ], [ 009 ], [ 00A ], [ 00B ] and [ 00C ] so that
the ghost can be reduced to a minimize value, resulting in the entirely well balanced screen
(center and periphery of four corners). (*3)
7. Input the write command [ 00~182B ] in the Hyper Terminal window to write the changed
value to the EEPROM.
In the , enter the value of 2 figures of the lower part in the in Item 6. (*3)
Blue
8. Input the XGA signal (SMTPE (B), No. 14).
9. Input the adjustment command [ 00~30E ] in the Hyper Terminal window to minimize
ghosts in the blue image.
In the , input the value from among the 5 types of [ 008 ], [ 009 ], [ 00A ], [ 00B ] and [ 00C ] so that
the ghost can be reduced to a minimize value, resulting in the entirely well balanced screen
(center and periphery of four corners). (*3)
10. Input the write command [ 00~182D ] in the Hyper Terminal window to write the changed
value to the EEPROM.
In the , enter the value of 2 figures of the lower part in the in Item 9. (*3)
*3 If the command was correctly sent, it will be returned as sent. Also, the current value can
be checked by sending with only [ 00~30C ], [ 00~1829 ], [ 00~30D ], [ 00~182B ], [ 00~30E ] or
[ 00~182D ] (with nothing entered in or ) .