23
AK - 45
CHASSIS
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.
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.
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.
000 255
001 036
002 019
003 020
004 030
005 026
006 003
007 004
008 005
009 005
ADJUST...
ADJUST...
OPTIONS...
AK45JA0XX
AK45JA0XX
SERVICE
Summary of Contents for C-2890EES
Page 7: ...7 C 2890EES CHASSIS LAYOUT Mother Unit CRT Unit Control Panel Unit ...
Page 69: ...53 AK 45 CHASSIS 14 6 GEOMETRY ADJUSTMENT 4 3 FORMATS 4 3 MODE 16 9 MODE ...
Page 70: ...54 AK 45 CHASSIS 16 9 FORMATS AUTO MODE ...
Page 71: ...55 AK 45 CHASSIS REGULAR MODE ...
Page 72: ...56 AK 45 CHASSIS ZOOM 14 9 MODE ...
Page 73: ...57 AK 45 CHASSIS ZOOM 16 9 MODE ...
Page 74: ...58 AK 45 CHASSIS SUBTITLE ZOOM MODE ...
Page 75: ...59 AK 45 CHASSIS FULL MODE ...
Page 76: ...60 AK 45 CHASSIS PANORAMIC MODE ...
Page 86: ...70 AK 45 CHASSIS 1 I H G F E D C B A 2 3 4 5 6 7 16 7 Schematic Diagram of CRT Socket Circuit ...
Page 91: ...75 AK 45 CHASSIS Notes ...