Alignment ITC222 Service Manual
Page 3-1
ALIGNMENT PROCEDURES
ALIGNMENT PROCEDURES (Continued)
:37
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Operating Conditions
Unless otherwise noted, the following conditions must be
observed when aligning the ITC222 chassis:
Chassis must be operated from a 120VAC isolation
transformer, with line voltage set to 120VAC (±2.0V).
Picture controls (black level, contrast, etc.) must be set to
factory presets via the Picture Quality menu.
Procedures must be performed in the sequence given.
A 10X probe must be used for oscilloscope and frequency
measurements.
The audio output leads must not be shorted together or to
ground with the chassis on.
All video signals must have -40 IRE sync tips unless specified
otherwise.
Chassis AC power must be removed for 10 seconds before
disconnecting any cable.
A 3-minute warm-up is required for chassis or module related
alignments. A 15-minute warm-up is required for Kine or
Convergence related alignments.
Required Test Equipment
- Dual-Trace Oscilloscope
- Digital Voltmeter
- Frequency Counter
- Audio Signal Generator
- NTSC Signal Generator (B&K 1249, or equivalent)
- MTS Signal Generator (B&K 2009, or equivalent)
- Sweep/Marker Generator (or Standard Signal
Generator)
- YPrPb Signal Generator (DVD player w/YPrPb)
- DC Power Supply (5.0V/0.25A) for TAG001
- Chipper Check® software
- Chipper Check® interface box and computer
- Personal Computer (IBM Compatible w/ CD ROM and
Sound Card)
NOTE: For optimum performance it is critical that this in-
strument be properly aligned. For Auto Convergence
to work correctly it is HIGHLY RECOM-
MENDED that the geometry alignments are first
verified
Small Signal Board (SSB) Replacement
All alignment data is stored in EEPROMs located on the
Small Signal Board (SSB). If the SSB needs to be replaced,
it is HIGHLY RECOMMENDED the EEPROM data be
downloaded by using Chipper Check. Once the SSB has
been replaced, upload the alignment data back into the
instrument. Then verify that the instrument is properly
aligned.
1. Open Chipper Check. Select “Dead Set” “ITC222”.
Follow the On Screen Instructions to establish a connection. Fill in the Customer Information on the “Customer
Info” tab and change to the EEPROM tab.
The following menu should appear.
2. Press the “Replace SSB Board” The following screen
appears
3. Chose “Replace SSB Board Procedure”. Follow the instructions on this screen to copy the alignment data from
the defective SSB to the new SSB.
NOTE: It may be necessary to perform the geometry align-
ment to get the auto convergence to work correctly.
Please refer to the section on Geometry Alignments
CRT Replacement (PTV Models)
If only 1 or 2 CRT’s are replaced use a convergence pattern
to align the new CRT. Align the new CRT to the pattern
generated by the existing CRT by adjusting the Yoke and
Centering Rings. Then run Auto Convergence. If all 3 CRT’s
are replaced, it will be necessary to first center the Green
CRT using a pattern with a center dot. Then align Red and
Blue following the Geometry Alignment procedures.
Service Mode
Most of the alignments for this chassis are software-driven.
Those alignments must be accessed and modified
through the front panel service mode.
Entering the TV Service Mode Using the Front Panel
Controls
1.
Press and release the
POWER button to turn the
instrument off.
2. Wait 10 seconds before trying to enter the Field Service
Mode.
3. Press and hold the VOLUME DOWN and CHANNEL
DOWN buttons for at least 8 seconds.
4. The instrument will switch on and come up with the field
service main menu on the screen. LED will illuminate
before the picture comes up.
The instrument should display the following menu:
Soft-Ver. ITC222_V100-0 000046
DVD Soft-Ver. 3.12
Config. W - - V - - -P - Serial-No. AMN456
QUIT
TUBE
CHASSIS SETUP
FEATURE SETUP
GEOMETRY
VIDEO
EVENT HISTORY
SOUND
MISCELLANEOUS
CONVERGENCE
DVD
UP DOWN
SELECT
Main Menu
The
CH /\ and CH \/ buttons on the front panel are used
to navigate up or down in the menu.
The VOL + and VOL - buttons on the FPA are used to
select a menu item or decrease or increase a value in a
selection list.
The remote control can also be used to navigate the field
NOTE: Before the Field Service Mode is exited; you must
service mode.
check STORE or all changes to alignments will be
• Clear button: When this button is pressed the Field
lost.
Service Mode disappears and the every-day TV
functions are available.
• Menu button: To re-enter the Field Service Mode,
make a long press on the Menu button. The service
technician re-enters in the same menu point where
he left the Field Service Mode.
• ∧: This button is used to navigate up in the menu.
• ∨: This button is used to navigate down in the menu.
• <: This button is used to select a menu item, to
decrease a value or to select the previous value in a
selection list.
• >: This button is used to select a menu item, to
increase a value or to select the next value in a
selection list.
• OK: This button is used to select or deselect a
menu item.
Main Menu
Soft-Ver: Displays the current software version.
Runtime Counter: Displays the total runtime in
hours and mintues.
DVD Soft-Ver: For DVD models only, displays the
current software version.
Config: Displays the configuration code of the
instrument. Each character represents a paraticular
hardware feature or option.
Serial-No.: Displays the serial number of the
instrument.
Common features found in the submenus
Return: The submenu is closed and the main Field
Service Mode menu appears.
Defaults: The default values for the current menu
are copied from ROM to RAM.
Note: If Default is checked a complete realignment of
that particular menu is required.
Store: All current values from a menu group are
stored into memory.
Restore: The last stored settings for the menu
displayed are copied from NVM to RAM.
Tube Type Menu
1. Select the correct tube type from a pulled down
list on the right hand side of the menu. (This
will activate new tube type values along with
default video and geometry parameters)
2. Check STORE to save new parameters in
memory.
TUBE
Return
Tube Type RP 16x9
Store
Restore
UP DOWN SELECT
Tube Submenu
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ALIGNMENT PROCEDURES (Continued)
Chassis Setup
ALIGNMENT PROCEDURES (Continued)
Subwoofer: Allows the instrument to be configured for
a subwoofer
Pict. Rotation: Specifies whether the picture rotation
option is available or not. (DV Models Only)
Autoconvergence: Specifies whether the
autoconvergence option is available or not. (PTV Models
Only)
DVI: Specifies whether the DVI option is available or
not.
Toplight: Specifies whether the toplight option is
available or not.
CHASSIS SETUP
Return
Subwoofer
Pict. Rotation
Autoconvergen ce
DVI
Toplight
Defaults
UP DOWN SELECT
Chassis Setup Submenu
Feature Setup
Curtains Effect: Determines if the curtains feature is
available to the user.
Opt. Still Pict. : Determines if the Optimised Still Picture
feature is available to the user.
Auto Film Mode: Determines if the Automatic Film
Mode Detection feature is available to the user.
Burn-In Prot. : Determines if the Burn-In Protection
feature is available to the user.
FEATURE SETUP
Return
Curtains Effect
Opt. Still Pict.
Auto Film Mode
Demo Mode
Burn-In Prot.
Welcome/Contact
Program Info
Defaults
UP DOWN SELECT
Feature Setup Submenu
Geometry Alignment
Entering the Geometry menu the display mode must be
set to Standard Scanning Mode (480i/480p and 1080i).
All 480i/480p alignments should be completed using the
RF input. Use either component input or DVI-input for
1080i adjustments.
Geometry Submenu
Alignment Procedure (Direct View Models Only)
NOTE: Unless otherwise noted all Geometry adjustments
must performed in both 480i/p and 1080i modes.
1. Place the instrument in the Field Service Mode.
2. Enter the Tube submenu. Verify the correct tube type
is selected.
3. Enter the Geometry submenu.
4. Adjust H-Amplitude (Horizontal Amplitude) for slight
underscan.
5. Enter the Video submenu. Selct the G2 alignment.
Adjust the Screen control on the flyback until the just
becomes visible.
Geometry Submenu
6. Adjust PL557 on the Dynamic Focus Board to center the
raster between the tube border.
7. Realign G2 for 150V on the highest cathode.
8. Tune the instrument to receive a crosshatch pattern.
9. Return to the Geometry submenu.
10. Adjust V-Slope (Vertical Slope) until the middle line of
the test pattern is just visible. (Not used in 1080i)
11. Using a Monoscope pattern, adjust V-Amplitude (Vertical Amplitude) until the first and last horizontal line of
the test pattern is just hidden by the tube.
NOTE: Instruments with 16/9 CRT’s must have this
alignment performed with the format set to 16/9.
12. Adjust V-Position (Vertical Position) until the picture is
centered vertically. It may be necessary to recheck the VAmplitude (Step 11) adjustment.
13. Adjust V-Linearity (Vertical Linearity) for equal height
of the squares in the crosshatch pattern.
NOTE: Instruments with 16/9 CRT’s must have this
alignment performed with the format set to 16/9.
14. Adjust H-Position (Horizontal Position) until the test pattern is horizontally centered.
15. Using a Monoscope pattern adjust H-Amplitude (Horizontal Amplitude) until the first and last horizontal line of
the test pattern is just hidden by the tube. It may be necessary to recheck the H-Position (Step 14) adjustment.
16. Using a Crosshatch pattern adjust EW-Amplitude (East
West Amplitude) until the vertical lines in the middle of
the CRT are straight.
17. Adjust EW-Upper Corner (East West Corner) until the
vertical lines are straight at the top of the screen.
18. Adjust EW-Lower Corner (East West Corner) until are
straight at the bottom of the screen.
19. Adjust EW-Symmetry (East West Symmetry or H-Bow)
until the left and right border of the screen are the same.
NOTE: It may be necessary to repeat Steps 14- 19 after this
adjustment for optimum performance.
20. Adjust H-Parallel (Horizontal Parallelogram) the offset
between the top and bottom of the picture.
21. Adjust EW-Trapezium (East West Trapezium) for best
compromise between Left and right vertical lines.
22. Adjust Breathing (EHT Compensation) until horizontal
amplitude will change with different beam current at the
same ratio as vertical amplitude.
23. H-Max and H-M set the range limitations of the H-Amplitude adjustment. This adjustment should only be used
in cases where CRT is replaced and it does not appear in
the CRT list. To access this adjustment, the Development Support must be checked in the Miscellanous Setup
menu.
24. To check the box to set the shutdown threshold for the
XRP circuitry, hold down the “OK” button for
approxomately 5 seconds. During this automatic process
the screen will blank, then reappear once it is finished.
25. Before exiting the Geometry menu, check Store to save
changes to memory.
26. After the Geometry Alignments, check the Earth-Field
Compensation (EFC) adjustment (DV Models Only). Enter the Advanced Picture Setting Menu. Using a crosshatch pattern, adjust the EFC for minimum picture rotation at the top and bottom.
Alignment Procedure (Projection Models Only)
NOTE: Unless otherwise noted all Geometry adjustments
must performed in both 480i/p and 1080i modes.
1. Place the instrument in the Field Service Mode.
NOTE: It is recommended the Geometry alignments be
performed using the Green CRT only.
2. Enter the Tube submenu. Verify the correct tube type is
selected.
3. Tune the instrument to receive a crosshatch pattern.
4. Return to the Geometry submenu.
5. Adjust V-Slope (Vertical Slope) until the middle line of
the test pattern is just visible. (Not used in 1080i)
6. Exit the Geometry submenu and turn the instrument OFF.
Disconnect the Convergence Yoke connectors BW001
and BW002 (Located in lower right corner of the Convergence Amplifier PCB). Turn the instrument ON and
tune to receive a center line pattern. Adjust horizontal
and vertical center lines according to the chart below
with the static convergence magnets. When completed
turn the instrument OFF and reconnect the convergence
yoke connectors.
Kine
Socket
Phosphor
ALIGNMENT PROCEDURES (Continued)
ALIGNMENT PROCEDURES (Continued)
Page 3-5
Page 3-6
Screen Size
40" 2.4 cm (0.94 in) 2.4 cm (0.94 in)
52" 3.1 cm (1.22 in) 3.1 cm (1.22 in)
56" 3.3 cm (1.29 in) 3.3 cm (1.29 in)
61" 3.5 cm (1.37 in) 3.5 cm (1.37 in)
Red Center Line
Set Left of Center
Blue Center Line
Set Right of Center
7. Place in the Field Service Mode. Enter the Geometry
submenu. Using a Monoscope pattern, adjust V-Amplitude (Vertical Amplitude) until the first and last horizontal line of the test pattern is just hidden by the tube.
8. Adjust V-Position (Vertical Position) until the picture is
centered vertically.
9. Adjust V-Linearity (Vertical Linearity) for equal height
of the squares in the crosshatch pattern.
10. Adjust H-Position (Horizontal Position) until the test pattern is horizontally centered.
11. Using a Monoscope pattern adjust H-Amplitude (Horizontal Amplitude) until the first and last horizontal line
of the test pattern is just hidden by the tube.
12. Using a Crosshatch pattern adjust EW-Amplitude (East
West Amplitude) until the vertical lines in the middle of
the CRT are straight.
13. Adjust EW-Trapezium (East West Trapezium) for best
compromise between Left and right vertical lines.
14. Adjust EW-Symmetry (East West Symmetry or H-Bow)
until the left and right border of the screen are the same.
NOTE: It may be necessary to repeat Steps 10- 14 after this
adjustment for optimum performance.
15. Adjust Breathing (EHT Compensation) until horizontal
amplitude will change with different beam current at the
same ratio as vertical amplitude.
16. H-Max and H-M set the range limitations of the H-Amplitude adjustment. This adjustment should only be used
in cases where CRT is replaced and it does not appear in
the CRT list. To access this adjustment, the Development Support must be checked in the Miscellanous Setup
menu.
17. Check the box to set the shutdown threshold for the XRP
circuitry by holding down the “OK” button for 5 sec.
During this automatic process the screen will blank, then
reappear once it is finished.
18. Before exiting the Geometry menu, check Store to save
changes to memory.
Yoke Centering Ring Adjustment
If Chipper Check is not available it is possible to replace a
single CRT and realign geometry by using the centering rings
on the CRT.
Using the convergence pattern available when in service
menu the pattern from the replacement CRT may be adjusted
to align with either of the two remaining CRT's using the centering rings shown in Figure 1.
First make certain the replacement CRT and yoke are assembled and placed back in the mounting as close as possible
to the original CRT and yoke. At this point having the convergence pattern on screen will assist in the mechanical mounting.
Using the centering rings and observing the convergence
pattern, rotate and move the pattern until the replacement color
overlays as close as possible to the two colors not replaced.
Moving the ring tabs together around the neck of the CRT
draws the raster in small circles. Spreading the tabs apart
moves the raster in more linear angles. The closer the tabs
are together, the less affect on the CRT beam they have.
When the raster is as close as possible fix the magnets with
paint or nail polish to prevent further movement.
After fixing the magnets, if gross geometry errors are apparent, geometry alignment is indicated. If the raster is close,
use the "Auto-convergence" feature provided in the consumer
menu to re-align convergence. This should correct most minor geometry problems. Follow auto-convergence with the
consumer red and blue centering adjustments, then evaluate
the raster again.
In most cases convergence will now be acceptable. If only
slight convergence errors are noted the technician should enter the manual digital convergence menu and begin "touchup" of the screen.
If gross geometry errors are still apparent re-evaluate
whether the errors are noticable on the replacement CRT or
whether they are global, affecting all three CRT's. If the errors affect all three CRT's a full geometry alignment is indicated. If the errors only affect one CRT, particulary the replacement, return to the mechanical placement and centering
ring adjustments and begin those procedures again.
Screen
Centering
SVM Yoke
Figure 1 - Centering Rings
Rotate Tabs Together
Spread Tabs Apart
Figure 2 - Centering Ring Tab Movement
Focus Adjustments
Before attempting the Focus Adjustments, allow the
instrument to warm up for a minimum of 15 minutes.
Dynamic Focus CRT (DV Models Only)
1. Tune the instrument to receive a crosshatch pattern.
2. Turn the F1 (Static) control on the focus block fully clockwise
3. Adjust the F1 control while observing the vertical lines
along the left side of the screen for best possible focus.
4. Turn the F2 (Dynamic) control on the focus block fully
clockwise.
5. Adjust the F2 control while observing the horzontal lines.
Adjust for best possible focus.
6. Repeat step 3 and 5 for best possible overall focus.
Single Focus CRT (DV Models Only)
1. Tune the instrument to receive a crosshatch pattern.
2. Turn PL501 (Located on the Dynamic Focus PCB) to the
full counter clockwise position.
3. Adjust F2 on the focus block for best possible focus of the
horizontal lines.
4. Adjust PL501 for best possible focus of the vertical lines.
5. Repeat steps 3 and 4 for best possible overall focus.
Focus Adjustment (PTV Models)
1. Tune instrument to receive a crosshatch pattern.
2. Preset Contrast to maximun.
3. Adjust each CRT separately. Cover the two CRT’s not being adjusted and adjust for best overall focus.
5. Adjust the Green Electrical Focus control, located behind
the speaker grill for best overall focus.
6. Repeat procedure for the Red and Blue CRT’s.
Video Alignments
VIDEO PA L RF - BG
Return
Peak White
Whitepoint R
Whitepoint G
Whitepoint B
G2 Alignment
Scaling Colour
Scaling Brightness
Cut off R
Cut off G
UP D OWN SELECT/CHANGE
VIDEO PAL RF - BG
Scaling Contrast
Scaling Tint
Contrast max
Drive Loop Disable
Text Contrast
Full White 4/3
Drive Level
Defaults
Store
Restore
UP DOWN SELECT/CHANGE
D4
80
F0
40
- 22
78
+90
D4
80
-18
- 22
78
Video Alignment Submenu
Before attempting the Video Alignments, allow the
instrument to warm up for a minimum of 15 minutes.
1. Tune the instrument to receive a crosshatch
pattern.
5. Place the instrument in the Field Service Mode.
6. Enter the Video submenu.
7. Select G2 adjustment.
8. Adjust Screen control until retrace lines become
visible, then adjust to make retrace lines invisible.
9. Press any key to exit the G2 alignment mode.
10. Select a pluge test pattern. Pattern should have a
0% background with a -2% and +2% bar.
11. Adjust Scaling Black Level to make the -2% bar
invisible, keeping the +2% bar visible.
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