TO ENTER SERVICE MODE
- Press [Mute, Timer & Picture] buttons on the remote control in the order, within '2' seconds, to enter service mode.
- Press [P“▲/▼”] buttons to select and item to adjust.
- Press [-“▲/▼”] buttons to change the data value to selected item.
- Press 'Menu' button to return to super menu.
- Under 'main menu' mode press 'Menu' button to 'Exit' form service menu mode.
AC power supply check and +B DC adjustment
- Check AC power supply is normal or not (120V, 60Hz and Sine Wave are normal)
- Receive Television broadcast signal, set PICTURE to standard mode
- Adjust RP950 so that voltages at two ends of C960 are +B.
Picture IF setting
Receive any signal, enter into VCJ VCO ADJà VIF
VCO AUTO ADJ
menu under factory mode, then press VOL+/- button, when “END” displays
on the screen, that means intermediate frequency has been adjusted to 45.75M in
IC automatically.
RFAGC adjustment
Receive VH signal (Channel 7 or channel 10), apply 60dBμV
gray scale signal
Enter VDJ ADJ à RF DELA Y ADJ
and press VOL“▲/▼” button to adjust
it until picture noise is just
disappeared.
FOCUS adjustment
Receive five circles pattern, adjust the pattern to standard
mode
Adjust focus potentiometer (horizontal output transformer) so that the center and four corners of pattern are
the best focus.
Horizontal
scanning, vertical scanning
and geometry correction
adjustment
Receive five circles
pattern signal, enter
RASTER ADJ menu
to adjust the following parameters:
V POSITION Vertical Position
V SIZE Vertical Size
H POSITION Horizontal Position
Grid voltage adjustment and White Balance adjustment
Enter factory menu firstly and set PICTURE to STANDARD.
Enter into factory mode to set the following parameters:
PICTURE ADJ menu
SUB BRIGHTNESS 160
SUB CONTRAST 80
CRT ADJ menu
CUT OFF-R 127
CUT OFF-G 127
CUT OFF-B 127
DRIVE R 63
DRIVE B 63
Enter into CRT ADJ
menu, press 0
button to display
one horizontal light line
on the screen, adjust grid
potentiometer until this
light line is
just
appeared. Press 0 button again to exit the horizontal light
line status. Insert the
plug for automatic
adjustment, running white
balance test program
(WB37150.EXE)
SMPS SCHEMATIC [Click on picture to Enlarge]
