Service Mode Adjustments; Ak45 Chassis Production Service Mode Adjustments; Service Menu; Adjust Menu - Sharp C-2890EES Service Manual

14.AK45 CHASSIS PRODUCTION SERVICE MODE ADJUSTMENTS

14.1.SERVICE MENU

All system, geometry and white balance alignments are performed in production service mode. Before
starting the production mode alignments, make sure that all manual adjustments are done correctly. To
start production mode alignments enter the MAIN MENU and then press the digits 4, 7, 2 and 5
respectively or press MUTE and INFO buttons at the same time. The following first menu appears on
the screen.
SERVICE
ADJUST...
OPTIONS...
You can select Adjust or Options items by pressing Up/Down buttons. Selected parameter will be
highlighted. In order to enter the selected parameter, press Left or Right button. To exit the service
menu press MENU button. Entire service menu parameters of AK45 CHASSIS are listed below.

14.2.ADJUST MENU

Select the parameter by pressing up/down buttons. Adjust the parameter by pressing Left/Right
buttons. In ADJUST menu, changed values are stored automatically.
ADJUST...
000 255
001 036
002 019
003 020
004 030
005 026
006 003
007 004
008 005
009 005
White Point Red, White Point Green, White Point Blue:
Not used.
AGC
Apply PAL BG signal, VHF-3 Channel-12 and 60dBµV signal level. Adjust AGC (Automatic Gain
Control) item by pressing Left/Right buttons till the voltage at AGC point (pin1 of the tuner) becomes 3.0
volts.
If PLL negative
Not used.
If PLL positive
Not used.
Y-Delay
Enter a PAL B/G colour and black-white bar test pattern via RF. Adjust Y-Delay for PAL till the colour
transients on the colour bar of the pattern become as sharper and colours between transients do not
mix with each other as possible.
AK45JA0XX
AK45JA0XX
23
AK - 45
CHASSIS