Electrical Adjustment (Lcd) - Panasonic DVD-LS91EE Service Manual

DVD-LS91EE / DVD-LS91GN / DVD-LS91GCS

11.5. Electrical adjustment (LCD)

[How to enter into the LCD panel adjustment mode]
Play back the specified video signal (10 steps, color bas
signal).
Press and hold down "Back skip" and "Pause" of the main unit
at the same time while pressing "Menu" on the remote control
unit.
[The DVD player is now in the FT02 mode]
Press the "Forward skip button twice to enter into the FT04
mode (LCD panel adjustment mode).
Press the "Playback" button to play back the signal which has
been played back before stopping and then, press the "Pause
(still) button.
[How to exit to normal mode]
(Exit the F4 mode)
1. Turn off the primary power supply (Remove the DC power
supply).
Turn on the power supply. Press the "Stop" to stop the system.
Press "Cancel" on the remote control unit (The Cancel key is
enabled only when the system is stopped.)
lWhenever the LCD panel is replaced, make the following
checks and adjustments.
lPress the "Enter" key and fix the settings.
lWhen the EEPROM" (IC3002) of the Main P.C.B. is replaced,
call up the LCD Panel adjustment mode (FT04) and execute
the AUDIO on the remove control unit and then check the
condition of the screen. Make adjustments as necessary.
11.5.1. Adjusting VCO oscillation
frequency
Adjustment is required when
The synchronization of the LCD
screen is irregular after any VCO-
related circuit part is replaced
Adjustment procedure
Use "1" on remote control unit.
Details of adjustment
Press " " and " "buttons on
remote controller, set the right
side number to "71".
Check point
TP8201
Adjustment UP Adjustment
DOWN
DVD DVD
player/remote player/remote
control unit control
Input video signal
-----
11.5.2. Adjusting DC offset of impressed
voltage
Adjustment is required when
Noise such as horizontal stripes
is found on the screen.
Adjustment procedure
Use "3" on remote control unit.
Details of adjustment
Press " "and" "buttons on
remote controller, set the right
side number to "AI".
11.5.3. Adjusting white balance
red/subcontrast red
Adjustment is required when
Remarkable deviation in white
balance is found
Adjustment procedure
Use "6" on remote control unit.
Details of adjustment
(White balance)
Press " "and " " buttons on
remote controller, set the number
of center to "80".
(Sub contrast)
Press " " and " " buttons on
remote controller, set the right
side number to "7E".
11.5.4. Adjusting whitebalance
blue/subcontrast blue
Adjustment is required when
Remarkable deviation in white
balance is found
Adjustment procedure
Use "7" on remote control unit.
Details of adjustment
(White balance)
Press " "and " " buttons on
remote controller, set the number
of center to "71".
(Sub contrast)
Press " "and " " buttons on
remote controller, set the right
side number to "84".
36
Check point
TL8401
Adjustment UP Adjustment
DOWN
DVD DVD
player/remote player/remote
control unit control
Input video signal
10step monochrome
Check point
TL8602
Adjustment UP Adjustment
DOWN
DVD DVD
player/remote player/remote
control unit control
Input video signal
10step monochrome
Check point
TL8604
Adjustment UP Adjustment
DOWN
DVD DVD
player/remote player/remote
control unit control
Input video signal
10step monochrome