Panasonic DVD-LS837EEK Service Manual ▷ View online
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Remove the solder shorts before trying to make the adjustment.
11.4.1.1. Preparations
1. Connect the main P.C.B. to the traverse ass’y with the extension cable.
2. Install the traverse ass’y to the tilt adjustment jig with three screws and three washers.
2. Install the traverse ass’y to the tilt adjustment jig with three screws and three washers.
Caution
Remove the rubber cushion of the traverse ass’y.
3. Install the traverse ass’y to the disc.
Caution
Make sure the disc is installed on the disc motor securely.
4. Disassemble the Main P.C.B., Operation P.C.B., Inverter P.C.B. and LCD panel as shown in figure below.
5. The disc cannot be played back with the disc cover removed. Press and hold down the S5201 and S5202 (Secure with cellu-
5. The disc cannot be played back with the disc cover removed. Press and hold down the S5201 and S5202 (Secure with cellu-
lose tape).
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11.4.1.2. Adjustment
1. Play back the disc (DVDT-S01/S15AS) and make sure the RF signal is outputted.
2. Play back the areas within a radius of 40 ± 1 mm of the disc (middle circumference).
3. Turn the adjustment screw A to minimize the jitter value in the tangential direction.
2. Play back the areas within a radius of 40 ± 1 mm of the disc (middle circumference).
3. Turn the adjustment screw A to minimize the jitter value in the tangential direction.
(*Once turn the screw to the full position and then back off. You should finish tightening in the tightening direction.)
4. Turn the adjustment screw C to minimize the jitter value in the radial direction.
(*Once turn the screw to the full position and then back off. You should finish tightening in the tightening direction.)
5. DISC height measurement (Measure the middle of the deflection of the disc and motor surface.)
*If the measured height is out of range, adjust to the specified value using the adjustment screws A, B, and C (by the same
angle).
angle).
11.4.1.3. Checking After Adjustment
Play back the test disc and ordinary discs to make sure that there is not any deterioration of image quality or missing of sound at
the inner, middle, and outer circumferences.
the inner, middle, and outer circumferences.
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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.
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.)
(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.)
Whenever the LCD panel is replaced, make the following checks and adjustments.
Press the "Enter" key and fix the settings.
When the EEPROM" (IC3002) of the Main P.C.B. is replaced, call up the LCD Panel adjustment mode (FT04) and execute the
Press the "Enter" key and fix the settings.
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.
11.5.1. Adjusting Common Voltage Amplitude
11.5.2. Adjusting Contrast
11.5.3. Adjusting Brightness
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 unit
Details of adjustment
Input video signal
Press “
” and “
” buttons on
remote controller, set the right side
number to “90”.
10step monochrome
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 unit
Details of adjustment
Input video signal
Press “
” and “
” buttons on
remote controller, set the right side
number to “64”.
10step monochrome
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 unit
Details of adjustment
Input video signal
Press “
” and “
” buttons on
remote controller, set the right side
number to “68”.
10step monochrome
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11.6. Electrical check (Video output check)
11.6.1. Checking video output (composite signal)
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:
3. Check that the composite signal output is the following value:
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
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