Saturday, 16 February 2019

SHARP 21LF 90RU PAL-SECAM SERVICE ADJUSTMENTS

SHARP 21LF 90RU PAL-SECAM SERVICE ADJUSTMENTS

 








                                                                 AK-44 CHASSIS

                                                                       Main Board

                                                                        CRT unit

                                                                            Headphone unit
SERVICE MODE ENTRY

  • Press "Menu" button on the remote control.
  • Press digit keys [4>7>2>5] in sequence to enter service mode.
Service Mode Screen.
  • Use the 'Cursor Up' | Cursor Dn' buttons to move between the registers. 
  • User 'Cursor Left | Cursor Right' buttons to change the data value to selected item.
  • To "EXIT' Service Mode, switch OFF the set by main Power Switch.
  • It is not required to memorize the adjustments.  Data are stored automatically. 
USING COLORED BUTTONS
  • By using four colored buttons on the remote control, different features or adjsut may be accessed.
AVL
  • Press the 'RED' button to activate or deactivate the Automatic Volume Level {AVL} between different broadcast channels.
GEOMETRY MENU
  • Press 'GREEN' button in order to change from the main service menu to the Geometry Menu.
  • To return to Main Menu, it should be pressed "Menu" button.
  • In the bottom area of this menu, it can be seen 'AUTO'.  By pressing 'WIDE MODE' button, it changes to (4:3) or (16:9) format.  
  • To perform the 'Geometry' adjustments, select the most suitable option.
Auto, entering 4:3 or 16:9 signal and proceeding with adjustments as below.
4:3, entering 4:3 signal and proceeding with adjustments as below.
16:9, entering 16:9 signal and proceeding with adjustments as beow.
GEOMETRY TABLE



DEFAULT VALUES

REGISTER
PARAMETER
A51EFS13X191

A51E;D032X001



4:3
16:9
4:3
16:9
VSIZ
VERTICAL SIZE
35
62
24
50
VPOS
VERTICAL POSITION
11
16
12
16
VSCO
NOT USED
14
14
14
14
VCCO
NOT USED
7
7
7
7
H SIZ
NOT USED
10
9
30
11
HPOS
HORIZONTAL POSTION
33
33
40
39
HPIN
NOT USED
19
15
27
15
HCCO
NOT USED
0
0
0
0
HTRP
NOT USED
10
10
3
10
VZSZ
NOT USED
3
2
7
2


SCREEN ADJUSTMENT

  • Press the 'Yellow' button in order to prepare the system for screen adjustments.  [Vertical scan disable].  Adjust horizontal line, via screen pot-meter, as thin as possible.  To return to main menu Menu button should be pressed.

SERVICE ADJUSTMENT TABLE



Register
Parameter
Notes
 Default
Values


.

A51EFS13X191
A51ELD032X001
OSD
OSD HORIZONTAL POSITION

70
81
IF1
IF COARSE ADJSUT

X
X
IF2
IF FINE ADJUST

X
X
IF3
IF COARSE ADJUST FOR L-PRIME

X
X
IF4
IF FINE ADJSUT FOR L-PRIME

X
X
AGC
AUTOMATIC GAIN CONTROL

X
X
VLIN
VERTICAL LINEARITY

37
10
RGBH
RGB HORIZONTAL SHIFT OFFSET
CVBS-RGB HORIZONTAL POSITION COMPENSATION
8
7
VSOF
VERTICAL SIZE OFFSET FOR 60Hz

(-30)
(-32)
VPOF
VERTICAL POSITION OFFSET FOR 60Hz

2
1
HSOF
VERTICAL SIZE OFFSET FOR 60Hz

(-22)
(-22)
HOPF
HORIZONTAL POSITION OFFSET FOR 60Hz

(-18)
(-18)
HTOF
HORIZONTAL TRAP CORRECTION OFFSET FOR 60Hz

(-19)
(-20)
WR
WHITE POINT ADJUST-RED

49
42
WG
WHITE POINT ADJUST-GREEN

45
41
WB
WHITE POINT ADJUST-BLUE

42
42
BR
BIAS FOR RED

31
31
BG
BIAS FOR GREEN

31
31
APR
APR THRESHOLD

10
4
BRI
FACTORY SETTING BRIGHTNESS

31
31
CON
FACTORY SETTING CONTRAST

49
49
COL
FACTORY SETTING COLOR

26
26
SHA
FACTORY SETTING SHARPNESS

6
6
HUE
FACTORY SETTING HUE

31
31
VOL
FACTORY SETTING VOLUME

9
9
WR-R
WHITE POINT ADJUST-RED [RGB MODE]

48
30
WG-R
WHITE POINT ADJUST GREEN [RGB MODE]

53
53
WB-R
WHITE POINT ADJUST-BLUE [RGB MODE]
37
40

FMP1
FM PRESCALER WHEN AVL IS OFF
STEREO ONLY
11
11
NIP1
NICAM PRESCALER WHEN AVL IS OFF
STEREO ONLY
25
25
SCP1
SCART PRESCALER WHEN AVL IS OFF

11
11
SEC2
SCART PRESCALER WHEN AVL IS ON FOR SECAM /L MONO

17
17
F1H
HIGH BYTE OF CROSSOVER FREQUENCY FOR VHF-1-VHF3
MEANIFUL FOR ONLY PLL TUNER

















AUTO PROGRAMMING SYSTEM SETUP

It is necessary let the TV set in the program number that will appear for the first time, because the A.P.S does not preset this selection.

  • Enter Service Mode.
  • Access TXT1 register by Cursor Up | Cursor Dn.
  • Press '7' button on the remote control in order to activate the auto programming system.
  • Exit the service mode, by the 'Menu' button.
  • Switch the TV OFF, using the mains switch.
EEPROM INITIALIZATION

If the EEPROM IC {IC500} is replaced, it will come fully programmed, and there fore it is not necessary to initialize the new device.  In some circumstances the EEPROM may become corrupted in use i.e. static discharge of lightning strike.  If this happens the EEPROM has to be replaced.

HOTEL MODE FUNCTIONS

  • The Hotel Mode deactivates Install and Program features from the Main Features Menu.  It is necessary to program the channel setting, tuning and storing, after this feature have deactivated.
  1. Enter the Service Mode.
  2. Access to OP4 register by Cursor Up/Dn.
  3. Press [4] button on the remote control in order to activate the Hotel Mode.
  4. Exit the service mode by "Menu" button.
  5. Enter again the Service Mode but a new sequence of numbers [1>3>2>5] consecutively.  The following On-Screen display appears.


  • Activate the Hotel Mode as the above top picture.
  • Proceed with the required volume limit.
  • Exit service mode
  •  
    ICs _ {ST92195_STV224X_UV1315_UV1316_UV1336_TDA2766|TDA7266L_TDA8174_TDA6107_
    MC44608_MSP34X0G_24C08
    TO ENTER SERVICE MODE
  • Press "Menu" button on the remote control.
  • Press {4,7,2,5} consecutively.
Service mode Screen.
Use the Cursor Up | Dn button to move between registers.
Use Cursor Left | Right button to change the data value to selected item.
Switch the TV "OFF' to "EXIT" service mode.
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