Vestel AK30 TV-DVD Combo – How to enter Service Mode – adjustments
CD
update procedure – How to set Region – SMPS circuit diagram - How to enter Service Mode – adjustments. Vestel
AK30 TV-DVD Combo. Used
ICs: ST92195, STV224X UV1315, UV1316,
UV1336,TECC2949PG40B,TAEA-G0XXD, TDA7266/TDA7266L,TDA8174, TDA6107JF, MC44608, MSP34X0G, TDA1308
CD
Update Procedure
1. Any Player can be updated automatically with Update CD which contains proper
files
2. Burn up CD within proper files (There should be no Volume Name for CD)
3. Open Tray and place update CD
4. You can see "Upgrade File Detected. Press Play to start" OSD message
5. Press Play button to start upgrade
6. You can see "File copying" OSD message for a few second
7. Tray is open automatically
8. No need for CD in tray; Take it from tray.
9. During upgrade procedure "CD upgrade start, Please wait.." indicator at OSD, and "UPG" indicator at VFD
10. Upgrade procedure takes about a few minutes, please wait if tray is open.
11. When CD update is finished tray is closed, screen is refreshed, update is finished.
12. To see Version Page:
• Press DISPLAY key. Setup Menu is displayed.
• Press “1”-“3”-“5”-“7” in Setup Menu when Video Setup Page is selected. Version Page is displayed.
• The 6th line (Build No) has both the hardware option (example: C6KN1) and the software build version
(example: 6027-13F) information.
• Press “DISPLAY” key to exit from Version Page.
Region Management
In Version Page by using Up and Down arrow keys the region code can be adjusted.
2. Burn up CD within proper files (There should be no Volume Name for CD)
3. Open Tray and place update CD
4. You can see "Upgrade File Detected. Press Play to start" OSD message
5. Press Play button to start upgrade
6. You can see "File copying" OSD message for a few second
7. Tray is open automatically
8. No need for CD in tray; Take it from tray.
9. During upgrade procedure "CD upgrade start, Please wait.." indicator at OSD, and "UPG" indicator at VFD
10. Upgrade procedure takes about a few minutes, please wait if tray is open.
11. When CD update is finished tray is closed, screen is refreshed, update is finished.
12. To see Version Page:
• Press DISPLAY key. Setup Menu is displayed.
• Press “1”-“3”-“5”-“7” in Setup Menu when Video Setup Page is selected. Version Page is displayed.
• The 6th line (Build No) has both the hardware option (example: C6KN1) and the software build version
(example: 6027-13F) information.
• Press “DISPLAY” key to exit from Version Page.
Region Management
In Version Page by using Up and Down arrow keys the region code can be adjusted.
ENTERING TO SERVICE MENU
In order to enter service menu, first enter the main menu and then press the digits 4, 7, 2 and 5 respectively.
To select adjust parameters, use Up or Dn buttons. To change the selected parameter, use Left or Right buttons.
Selected parameter will be highlighted.
Press “TV” button to leave service menu.
SMPS CIRCUIT DIAGRAM
USING COLOUR BUTTONS ON SERVICE MENU
RED BUTTON : It switches the AVL to ON or OFF mode on service menu. AVL word is visible on service menu when AVL is on.
GREEN BUTTON : It switches to GEOMETRY adjust menu. Geometry of the picture is adjusted in this menu.
YELLOW BUTTON : It switches to VERTICAL SCAN DISABLE mode. It is useful to adjust screen voltage.
BLUE BUTTON : It is used to adjust AGC and IF automatically on service menu.
Service Mode Adjustments
IF Adjustments
IF1: IF Coarse Adjustment 003
IF2: IF Fine Adjustment 073
IF3: IF Coarse Adjustment for L-prime 004
IF4: IF Fine Adjustment for L-prime 065
IF NEGATIVE ADJUSTMENT (WITHOUT L’ SYSTEMS)
Set the video pattern to a PAL colour bar pattern with frequency 38.9
MHz. Apply this IF signal to PIN-10 and PIN-11 of tuner. Press PROG-1
and after that BLUE (INSTALL)button from remote controller. Select the
standard as BG or I. (if BG is not available) Enter service menu. Select
IF1 parameter from service menu and press BLUE (INSTALL) button from
remote controller. IF adjustment will be done automatically by software.
IF POSITIVE ADJUSTMENT (WITH L’ SYSTEMS)
Set the video pattern to a SECAM-L colour bar pattern with frequency
33.9 MHz. Apply this IF signal to PIN-10 and PIN-11 of tuner. Press
PROG-1 and after that BLUE (INSTALL)button from remote controller.
Select the BAND VHF-1 (S1 – S4 for PLL tuners) and standard as L’. Enter
service menu. Select IF1 parameter from service menu and press BLUE
(INSTALL) button from remote controller. IF adjustment will be done
automatically by software.
AGC:
Automatic Gain Control
In
order to do AGC adjustment, enter a 60µdBV RF signal level from channel C-12
(224.25 MHz)
Select
AGC parameter from service menu. Press BLUE (INSTALL) button from remote
controller.
The
adjustment will be done automatically by software. See the AGC indicator on
service menu, it must be 1. Check that picture is normal at 90dBµV signal
level.
Min.
Value: 000 Max. Value: 063 Recommended Value: Automatically, described above.
SCREEN
ADJUSTMENT: (FBT Screen)
Enter
service menu by pressing “MENU” and “4, 7, 2, 5” or press the mute and info
buttons at the same time from remote controller. Then press yellow button to
disable vertical scan. Adjust horizontal line via screen pot. as thin as
possible. Press yellow button again to enable vertical scan.
Press “TV” button
to leave (Exit) service menu.
RGBH: RGB Mode Horizontal Shift Offset
Enter a
RGB circle test pattern via video inputs. Force the TV to RGB mode by
pressing AV button from remote controller. Change RGB Horizontal
Position till the picture is horizontally centered. Check and readjust
RGBH item if the adjustment becomes improper after some other geometric
adjustments are done. Min. Value: 000 Max. Value: 063 Default Value :
007
VSOF: Vertical Size Offset for 60 Hz
Enter
an NTSC-M circle test pattern via RF or video inputs. Change Vertical
Size until the checkered parts of test pattern on both of upper and
lower side disappear. Check and readjust Vertical Size item if the
adjustment becomes improper after some other geometric adjustments are
done. Min. Value: -08 Max. Value: +55 Recommended Value: -16.
VPOF:
Vertical Position Offset for 60 Hz
Enter
an NTSC-M circle test pattern via RF or video inputs. Change Vertical Position
till the picture is vertically centered. Check and readjust Vertical Size item
if the adjustment becomes improper after some other geometric adjustments are
done. Min. Value: -08 Max. Value: +55 Recommended Value: +09
HSOF:
Horizontal Size Offset for 60 Hz Not Used For This Model
HPOF:
Horizontal Position Offset for 60 Hz
Enter
an NTSC-M circle test pattern via RF or video inputs. Change Horizontal
Position till the picture is horizontally centered. Check and readjust
Horizontal Position item if the adjustment becomes improper after some other geometric
adjustments are done. Min. Value: -08 Max. Value: +55 Recommended Value : -06.
HTOF: Horizontal Trapezoid Offset for 60 Hz Not Used For This Model.
VSIZ: Vertical Size for 50 Hz
Enter a
PAL B/G circle test pattern via RF. Change VSIZ (Vertical Size) until
horizontal black lines on both the upper and lower part of the test
pattern become very close to the upper and lower horizontal sides of
picture tube and nearly about to disappear. Check and readjust Vertical
Size item if the adjustment becomes improper after some other geometric
adjustments are done. Min. Value: 000 Max. Value: 063 Recommended Value
for 4:3 mode 030 Recommended Value for 16:9 mode 063.
VPOS:
Vertical Position for 50 Hz
Enter
a PAL B/G circle test pattern via RF. Change Vertical Position till the test
pattern is vertically centered. Horizontal line at the center pattern is in
equal distance both to upper and lower side of the picture tube. Check and
readjust Vertical Position item if the adjustment becomes improper after some
other geometric adjustments are done.
Min.
Value: 000 Max. Value: 063 Recommended Value for 4:3 mode 014 Recommended Value
for 16:9 mode 020
VSCO:
Vertical S-Correction for 50 Hz Not Used For This Model.
VCCO:
Vertical Corner Correction for 50 Hz Not Used For This Model.
HSIZ:
Horizontal Size for 50 Hz Not Used For This Model.
HPOS:
Horizontal Position for 50 Hz
Enter
a PAL B/G circle test pattern via RF. Change Horizontal Position until the
picture is horizontally centered. Check and readjust Horizontal Position item
if the adjustment becomes improper after some other geometric adjustments are
done. Min. Value: 000 Max. Value: 063 Recommended Value for 4:3 mode 032
Recommended Value for 16:9 mode 033.
HPIN:
Horizontal Pincushion for 50 Hz Not Used For This Model.
HCCO: Horizontal Corner Correction for 50 Hz Not Used For This Model.
HTRP: Horizontal Trapezoid for 50 Hz Not Used For This Model.
VZSZ: Vertical Zoom Size for 50 Hz Not Used For This Model.
HCCO: Horizontal Corner Correction for 50 Hz Not Used For This Model.
HTRP: Horizontal Trapezoid for 50 Hz Not Used For This Model.
VZSZ: Vertical Zoom Size for 50 Hz Not Used For This Model.
WHITE BALANCE ADJUSTMENT
The
following three parameters are used to make white balance adjustment. To
do this, use a Colour Analyzer. Using WR (White point adjust for RED),
WG (White point adjust for GREEN), WB (White point adjust for BLUE)
parameters, insert the + sign in the square which is in the middle of
the screen.
WR:
White Point Adjustment for RED Use this parameter to set the strength of
RED in White. Min. Value: 000 Max. Value: 063 Default Value : 030
WG:
White Point Adjustment for GREEN Use this parameter to set the strength
of GREEN in White. Min. Value: 000. Max. Value: 063 Default Value : 018
WB:
White Point Adjustment for BLUE Use this parameter to set the strength
of BLUE in White. Min. Value: 000 Max. Value: 063 Default Value : 020
BR: Bias for RED Use this parameter to set the strength of RED in BLACK. Min. Value: 000 Max. Value: 063 Default Value : 031
BG: Bias for GREEN Use this parameter to set the strength of GREEN in BLACK. Min. Value: 000 Max. Value: 063 Default Value : 031
APR:
Automatic RGB Peak Regulation (APR) Threshold
The
goal of the APR function (Automatic RGB peak regulation) is to compensate the
spread of contrast between sources or programs by regulating the peak amplitude
of RGB signals. This results in a picture with higher contrast whatever the
input signal amplitude. Besides, APR increases the contrasts of pictures with
low contrast and avoids the clipping at RGB output for pictures with high
amplitude. To enable APR, refer to OP3 in Option Bytes. Min. Value: 000 Max.
Value: 015 Default Value : 006 The following default values are the factory
settings of the corresponding items. Except Volume, all values are restored
when STANDARD button is pushed during no menu is displayed. Volume is set to
its default value only if the A.P.S. bit is set when the TV is turned on.
AVL:
Automatic Volume Control
In order to make AVL ON or
AVL OFF, press the RED button while in service menu. If AVL is ON, the AVL
string occurs on the bottom right of the service menu screen. If AVL is OFF, no
string occurs about AVL on the bottom of the service menu.
FMP1: FM Prescaler when AVL is OFF Min. Value: 000 Max. Value: 127 Recommended Value: 009
NIP1: NICAM Prescaler when AVL is OFF Min. Value: 000 Max. Value: 127 Recommended Value: 021
SCP1: SCART Prescaler when AVL is OFF Min. Value: 000 Max. Value: 127 Recommended Value: 008
SEC1: SECAM Prescaler when AVL is OFF Min. Value: 000 Max. Value: 127 Recommended Value: 008
FMP2: FM Prescaler when AVL is ON Min. Value: 000 Max. Value: 127 Recommended Value: 016
NIP2: NICAM Prescaler when AVL is ON Min. Value: 000 Max. Value: 127 Recommended Value: 018
SCP2: SCART Prescaler when AVL is ON Min. Value: 000 Max. Value: 127 Recommended Value: 017
SEC2: SECAM Prescaler when AVL is ON Min. Value: 000 Max. Value: 127 Recommended Value: 000
