Panasonic DVD-LS835EE, Service Manual

Page: 38 / 81

12.5. 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.)
O
Whenever the LCD panel is replaced, make the following
checks and adjustments.
O
Press the "Enter" key and fix the settings.
O
When 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.
12.5.1. Adjusting Common Voltage
Amplitude
Adjustment is required when Check point
----- TL8401
Adjustment procedure Adjustment UP Adjustment
DOWN
Use “2” on remote control unit. DVD
player/remote
control unit
DVD
player/remote
control
Details of adjustment Input video signal
Press “ “ and “ “ buttons on
remote controller, set the right
side number to “90”.
10step monochrome
12.5.2. Adjusting Contrast
Adjustment is required when Check point
----- TL8603
Adjustment procedure Adjustment UP Adjustment
DOWN
Use “4” on remote control unit. DVD
player/remote
control unit
DVD
player/remote
control
Details of adjustment Input video signal
Press “ “ and “ “ buttons on
remote controller, set the number
of center to “64”.
10step monochrome
12.5.3. Adjusting Brightness
Adjustment is required when Check point
----- TL8603
Adjustment procedure Adjustment UP Adjustment
DOWN
Use “4” on remote control unit. DVD
player/remote
control unit
DVD
player/remote
control
Details of adjustment Input video signal
Press “ “ and “ “ buttons on
remote controller, set the right
side number to “68”.
10step monochrome
12.6. Electrical check (Video output
check)
12.6.1. Checking video output (composite
signal)
Check point Mode Disc
Video output terminal Color bar
playback (75%)
DVDT-S15AS
Measuring apparatus Check value
Oscilloscope Y: 1000 mV ± 100 mV
Cyan: 650 mV ± 100 mV
Purpose: Keep the interchangeability of video signal
output
1. Terminate the composite signal of the video output
terminal with 75
Ω
and input into the oscilloscope.
2. Select color bar 75% from the titles of the DVD test disc
and play back.
3. Check that the composite signal output is the following
value:
38
DVD-LS83E / DVD-LS83EB / DVD-LS83EE / DVD-LS83EG / DVD-LS835EE / DVD-LS86EB / DVD-LS86EE / DVD-LS86EG