HITACHI CL28W46N
Manual de Servicio

14. 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... AK45JA0XX AK45JA0XX

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 the model 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... 000 001 002 003 004 005 006 007 008 009 255 036 019 020 030 026 003 004 005 005

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 p ositive 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.

18 No. 0113 Service Manual