DOWNLOAD Sharp LC-30HV4E (serv.man2) Service Manual ↓ Size: 16.95 MB | Pages: 127 in PDF or view online for FREE

23.Take off the LCD panel with panel shield by removing 4 screws.

24.Take off D-BEF sheet, prism sheet and diffusion sheet.  Take off ITO sheet and diffusion panel by removing 2

screws.

25.Take off the panel shield by removing 6 screws and 2 in the center.

Lamp

LCD Panel

Prism Sheet

ITO Sheet

D-BEF Sheet

25

25

24

Diffusion Sheet

LCD Panel

23

23

Panel Shield

Diffusion Panel

24

24

25

Preparation for adjustment

1. The product has been adjusted and optimized in the factory. If the product needs to be readjusted for some

reason, e.g., after parts replacement, follow the instructions shown below.

2. Control parameter values set in the in-process adjustment mode has been stored in the corresponding registers.

When the product is readjusted, the contents of the registers are changed. Before readjustment, factory settings
should be noted in case the contents of registers require to be restored.

3. Use a stabilized AC power supply.
4. To rewrite a program, you should note the items you want to change and initialize EEPROM, and then rewrite

the changes into EEPROM.

How to enter the in-process adjustment mode

1. Entering the in-process adjustment mode:

Connect the system cable between the display and AVC system.
Turn on the main power while holding down the "Input" button and the "Volume (down)" button simultaneously.
The system will be activated.

~

If you see multiple lines of blue characters on the display, you are in the in-process adjustment mode. If not

(the normal activation screen opens), retry.

2. Accessing the inspection process mode:

After activation of the system, make adjustments according to the instructions indicated on the process adjustment
OSD menu screen.
Move to the General Process Adjustment (AVC System Section Process).

3. Restoring factory settings:

When the "INDUSTRY INIT" button is selected after activation of the system, factory channel setting remains
unchanged after the system exits from the in-process adjustment mode.
Changes made by the user will default to factory settings. Note that channel setting is also initialized.

4. Exiting from the in-process adjustment mode:

Unplug the power cable while the system is in the in-process adjustment mode to exit from the mode.
Take care not to press the "Power" button on the remote controller or the AVC system after using factory
settings to run the system.

5. OSD menu screen and menu items during manual adjustment:

~

The layout and menu items of the OSD menu screen may somewhat vary depending on the program versions.

~

Just rewriting a program does not cause settings to be "initial values". (Preparation for adjustment)

1

. Button operation in the in-process adjustment mode

Cursor Up

Move to the next page

Cursor Down

Back to the previous page

Volume (High)

Increase the setting by 1

Volume (Low)

Decrease the setting by 1

Enter

Execute the function

Cursor Left

Increase the setting by 10

Cursor Right

Decrease the setting by 10

Channel Select (Up)

Move the cursor up

Channel Select (Down)

Move the cursor down

Input Change

Change input (Tuner -> Input 1 -> Input 2 ->Input 3 -> Input 4 -> PC ->)

CAUTION: Exercise great care to hide the procedure in entering the in-process adjustment mode from the
customer. Inadvertent setting changes in this mode may cause a fatal error resulting in a program being
unrecoverable.

CENTER Version   

OSD Version   

CVIC Version   

TTXP Version  

∫   ∫
∫   ∫
∫   ∫
∫   ∫

2001 06 21A

XXXXXXXX

XXXXXXXX

XXXXXXXX

     ∫
     ∫
     ∫
     ∫

Page

Program version

Color system

TUNER

NO SIG

1/13

HDCP:OFF EUROPE

EUROPE

Main unit

AV unit

HDCP

Source of input

2

. In-process adjustment screen layout

6. Loading the backup data and setting HDCP when the PC I/F unit is replaced

Nearly all data including factory settings, user settings, and channel setting is stored in the PC I/F unit.
The product comes with EEPROM (IC1506) on the Main Unit in case the PC I/F unit is replaced; original data
backed up on the EEPROM can be loaded to the new PC I/F unit.

∫

 How to load the backup data

Select EEPRON RECOVERT in the OSD menu (page 13/13) and turn the  Volume  key ON; then press
ENTER.

∫

 How to set HDCP

After completion of adjustments, select KEY WRITE "ON" in the OSD menu (page 1/13) for manual adjustment
and turn the  Volume  key ON; then press  ENTER.

Ë

Ë

Ë

Ë

Ë

1)  Analog adjustment

(1) AVC System voltage adjustment

(2) PAL signal adjustment

1

In-process adjustment
mode
(Check the destination.)

Using the In-process adjustment remote controller,
enter the in-process adjustments mode.
Check that the destination is EUROPE.

2

AVC center 3.3V
adjustment

Connect a DC voltmeter to TP4
at the opening on the top of the
PC I/F unit.

Move the cursor to the [

Ë

+Badj3.3V] line and adjust

the TP4 voltage to 3.25±0.01V.

3

AVC center 1.8V
adjustment

Connect DC voltmeter to
TP1701.

Move the cursor to the [

Ë

+BAdj1.8V] line and press

OK.
Adjustment is complete if [

Ë

+BAdj1.8V complete]

appears.
If ERR occurs, adjust pin 6 at CN9 on the PC I/F unit
so that 1.8V is reached.

1

Setup

1. Set colour system to “PAL”.
2. Select PAL source.

100% colour bar signal including 100% white, such
as split field colour bar

2

Tuner level adjustment

1. Adjust TP1101 so that the Y signal without the

chroma component should be 1.00 ±0.05 Vp-p
(between the bottom of sync signal and the white
peak).

Connect the oscilloscope to
TP1101.