Service Mode Adjustments; Service Menu; Service Menu Entrance; Service Adjustments - Sharp 21LF-90N Service Manual

14. SERVICE MENU

14.1 Service Menu entrance

All system, geometry and white balance alignments are performed in Service Mode. Before starting the service
mode alignments, make sure that all manual adjustments are done correctly.
To enter the service mode:
1. Press the MENU (30) button on the remote control gun. See figure 5.
2. Press digit keys 4, 7, 2 and 5 consecutively.
When the Service Mode is entered the following On Screen Display appears (figure 4):
Figure 4. Service Mode
To adjust the different registers:
1. Use the CURSOR UP (2) / DOWN (31) buttons to move between the registers. See the above right figure.
2. Use the CURSOR LEFT (32) / RIGHT (3) buttons to change the data. See figure 5.
To memorize the adjustment:
It is not required to memorize the adjustment. Data are stored automatically.
To exit the Service Mode:
Switch the TV off using the mains switch.

14.2 Service Adjustments

Register Parameter
OSD OSD Horizontal Position
IF1 IF Coarse Adjust
IF Fine Adjust
IF2
IF Coarse Adjust for L-Prime
IF3
IF4 IF Fine Adjust for L-Prime
AGC Automatic Gain Control
VLIN Vertical Linearity
RGB Horizontal Shift Offset
RGBH
Vertical Size Offset for 60 Hz
VSOF
VPOF Vertical Position Offset for 60 Hz
HSOF Horizontal Size Offset for 60 Hz
HPOF Horizontal Position Offset for 60 Hz
Horizontal Trap Correction Offset for 60 Hz
HTOF
WR White Point Adjust for RED
WG White Point Adjust for GREEN
White Point Adjust for BLUE
WB
Bias for RED
BR
Bias for GREEN
BG
Figure 5. Remote Control
Notes
A51EFS13X191 A51ELD032X001
CVBS – RGB Horizontal
position compensation
23
Default Values
70 81
X X
X X
X X
X X
X X
37 10
8 7
-30 -32
2 1
-22 -22
-18 -18
-19 -20
49 42
45 41
42 42
31 31
31 31
AK - 44
CHASSIS