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6 Alignment and Adjustments
This section of the service manual explains how to make permanent adjustments to the monitor. Directions are given for adjustments using the monitor Interface Board Ver. 2.0 and software (SoftJig).
6-1 Adjustment Conditions
Caution: Changes made without the SoftJig are saved only to the user mode settings. As such, the settings are not permanently stored and may be inadvertently deleted by the user.
6-1-1 Before Making Adjustments
6-1-1 (a) ORIENTATION When servicing, always face the monitor to the east. 6-1-1 (b) MAGNETIC FIELDS Whenever possible, use magnetic field isolation equipment such as a Helmholtz field to surround the monitor. If a Helmholtz field is not available, frequently degauss the unit under test. Caution: Other electrical equipment may cause external magnetic fields which may interfere with monitor performance. Use an external degaussing coil to limit magnetic build up on the monitor. If an external degaussing coil is not available, use the internal degaussing circuit. However, do not use the internal degaussing circuit more than once per 30 minutes. 6-1-1 (c) WARM-UP TIME The monitor must be on for 30 minutes before starting alignment. Warm-up time is especially critical in color temperature and white balance adjustments. 6-1-1 (d) SIGNAL Analog, 0.714 Vp-p positive at 75 ohm, internal termination Sync: Separate/Composite (TTL level negative/positive) Sync-on-Green: Composite sync 0.286 Vp-p negative (Video 0.714 Vp-p positive) 6-1-1 (e) SCANNING FREQUENCY Horizontal: 30 kHz to 70 kHz (Automatic) Vertical: 50 Hz to 160 Hz (Automatic) Unless otherwise specified, adjust at the 1024 x 768 mode (H: 60 kHz, V: 75 Hz) signals. Refer to Table 2-1 on page 3-3.
6-1-1 (f) HIGH VOLTAGE ADJUSTMENT Signal: No signal Display image: Self raster Contrast: Maximum Brightness: Maximum Limit: 26 kV ± 0.5 kV Measure the hight voltage level at the anode cap. High voltage should be within the limit as above. If the high voltage needs adjustment use the following procedure. PROCEDURE 1. Turn the power off and disconnect the AC line cord from the power source. 2. Unsolder and remove VR501 on the Main PCB. 3. Replace VR501 and adjust the high voltage to the specification. 4. Using a soldering iron, melt the adjustment cap on VR501 to prevent any movement. 6-1-1 (g) G2 (SCREEN) VOLTAGE ADJUSTMENT Signal: No signal Display image: Self raster Contrast: Maximum Brightness: Maximum Adjust the Screen VR of the FBT so that the G2 (Screen) Voltage for SDD CRT is 430 V ± 10 V. 6-1-1 (h) HORIZONTAL FREE-RUN FREQUENCY ADJUSTMENT Signal: 60 kHz/75 Hz Contrast: Maximum Brightness: Maximum Connect the Frequency counter probe to the H-DY (Red wire). Conncet pin 26 of IC401 to the Ground. Adjust VR 402 to 58.7 kHz ± 10 Hz. 6-1-1 (I) CENTER RASTER Adjust SW401 so that the back raster comes to the center when you apply a signal of 60 kHz/75 Hz.
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6-1
6 Alignment and Adjustments 6-1-1 (J) BRIGHTNESS AND CONTRAST Unless otherwise specified, adjust external VRs: Brightness: Maximum (turn knob fully clockwise) Contrast: Maximum (turn knob fully clockwise) Note: The signal cable connector which includes the 3-wire cable must connect to the monitor. If you use Setup 2 (PC only, no signal generator) you can only make adjustments to the signal timing available on that computer system. To make corrections to all factory timings requires the use of an additional signal generator.
MONITOR INTERFACE BOARD VER. 2.0 5V DC ADAPTOR PARALLEL CABLE PC SIGNAL GENERATOR SIGNAL CABLE
6-1-2 Required Equipment
The following equipment may be necessary for adjustment procedures: 6-1-2 (a) DISPLAY CONTROL ADJUSTMENT 1. Non-metallic () screwdriver: 1.5 mm Non-metallic () screwdriver: 3 mm 2. Philips (+) screwdriver: 1.5 mm 3. Non-metallic hexkey: 2.5 mm 4. Digital Multimeter (DMM), or Digital Voltmeter (DVM) 5. Signal generator, or Computer with a video board that uses the ET-4000 chipset (strongly recommended if using Samsung DM 200 software) and that displays: 1024 x 768 @ 75 Hz, or 800 x 600 @ 75 Hz (minimum). 6. Personal computer 7. Required software: Softjig.exe from Samsung which includes the cg17e.c data file Samsung DM200, or DisplayMate for Windows from Sonera Technologies 8. Interface Board Ver. 2.0 Code No. BH81-90001K 9. Parallel communications cable (25-pin to 25-pin); Code No. BH81-90001H 10. Signal cable (15-pin to 15-pin cable with additional 3-pin connector); Code No. BH81-90001J 11. 5 V DC adapter, not supplied Note: SoftJig Ass'y (includes items 8, 9 and 10) Code No. BH81-90001L
3-WIRE CABLE
Figure 6-1. Setup 1, With Signal Generator
MONITOR INTERFACE BOARD VER. 2.0 5V DC ADAPTOR SIGNAL CABLE PARALLEL CABLE PC D-SUB CONNECTOR 3-WIRE CABLE
Figure 6-2. Setup 2, Without Signal Generator 6-1-2 (b) COLOR ADJUSTMENTS 1. All equipment listed in 6-1-2 (a), above 2. Color analyzer, or any luminance measurement equipment
6-1-4 After Making Adjustments
After finishing all adjustments, test the monitor in all directions. If, for example, the monitor does not meet adjustment specifications when facing north, reposition the monitor to face east and readjust. This time, try for an adjustment closer to the ideal setting within the tolerance range. Test the unit again in all directions. If the monitor again fails to meet specifications in every direction, contact your Regional After Service Center for possible CRT replacement.
6-1-3 Connecting the SoftJig
Connect the monitor to the signal generator and/ or PC as illustrated in Figures 6-1 and 6-2. Refer to Softjig Manual.
6-2
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6 Alignment and Adjustments
6-2 Using the SoftJig
Refer to Softjig Manual.
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6 Alignment and Adjustments
6-3 Display Control Adjustments
6-3-1 Centering
Centering means to position the center point of the display in the middle of the display area. Horizontal size and position and vertical size and position control the centering of the display. Adjust the horizontal size and vertical size to their optimal settings: 306 mm (H) x 230 mm (V). Adjust the horizontal position and vertical position to 4.0 mm of the center point of the screen. |A-B| 4.0 mm. |C-D| 4.0 mm.
C DISPLAY AREA A B EDGE OF BEZEL D
Click on the << or >> box next to H_POSI to center the horizontal image on the raster. 6-3-1 (d) VERTICAL POSITION ADJUSTMENT CONDITIONS Scanning frequency: 60 kHz/75 Hz Display image: Crosshatch pattern Click on the << or >> box next to V_POSI to center the vertical image on the raster.
6-3-2 Linearity
Linearity affects the symmetry of images as they appear on the screen. Unless each row or column of blocks in a crosshatch pattern is of equal size, or within the tolerances shown in Tables 6-2 and 6-3, an image appears distorted, elongated or squashed. Table 6-1. Standard Modes Linearity: 640x480/75Hz, 800x600/85Hz and 1024x768/85Hz
Standard Modes Linearity Each block (10 %) 4:3 Difference between adjacent blocks (4 %)
Figure 6-3. Centering 6-3-1 (a) HORIZONTAL SIZE ADJUSTMENT CONDITIONS Scanning frequency: 60 kHz/75 Hz Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum Click on the << or >> box next to H_SIZE to adjust the horizontal size of the display pattern to 306 mm. (Tolerance: ± 3 mm.) Caution: Must be adjusted first of all the H_SIZE to 306 mm ± at VGA2 (31 kHz/70 Hz). Because all mode variable H_SIZE range is based on the adjusted factory data of VGA2. 6-3-1 (b) VERTICAL SIZE ADJUSTMENT CONDITIONS Scanning frequency: 60 kHz/75 Hz Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum Click on the << or >> box next to V_SIZE to adjust the vertical size of the display pattern to 230 mm. (Tolerance: ± 3 mm.) 6-3-1 (c) HORIZONTAL POSITION ADJUSTMENT CONDITIONS Scanning frequency: Display image: 60 kHz/75 Hz Crosshatch pattern
Horizontal: 18.2~20.1 Horizontal: Less than 0.77 mm Vertical : 18.2~20.1 Vertical : Less than 0.77 mm Horizontal: 17.1~18.9 Horizontal: Less than 0.72 mm Vertical : 18.2~20.1 Vertical : Less than 0.77 mm
5:4
Table 6-2. Other Modes Linearity: VGA, SVGA, XGA, MAC, etc.
Supported Timing Mode Each block (14 %) 4:3 Horizontal: 17.8~20.5 Vertical : 17.8~20.5 Horizontal: 16.7~19.2 Vertical : 17.8~20.5 Difference between adjacent blocks (5 %) Horizontal: Less than 0.96 mm Vertical : Less than 0.96 mm Horizontal: Less than 0.90 mm Vertical : Less than 0.96 mm
5:4
6-3-2 (a) HORIZONTAL LINEARITY ADJUSTMENT The CKG7507L/LM monitors offer only Vertical Linearity adjustments. Horizontal Linearity is fixed on the Chassis and is not adjustable.
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6 Alignment and Adjustments 6-3-2 (b) VERTICAL LINEARITY ADJUSTMENT CONDITIONS Scanning frequency: 60 kHz/75 Hz Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum To adjust the Vertical Linearity, refer to Tables 6-1 and 6-2 for the tolerance range. Click on the << or >> box next to V_LIN to optimize the image. Click on the << or >> box next to PARALL to make the image area rectangular.
4 mm
Figure 6-6. Parallelogram
6-3-6 Side Pincushion Adjustment
CONDITIONS Scanning frequency: 60 kHz/75 Hz Display image: Crosshatch pattern Click on the << or >> box next to BARREL to straighten the sides of the image area.
| C1 |, | C2 | 2.0 mm, | D1 |, | D2 | 2.0 mm. C2
6-3-3 Trapezoid Adjustment
CONDITIONS Scanning frequency: 60 kHz/75 Hz Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum Click on the << or >> box next to TRAPE to make the image area rectangular.
| A - B | < 4 mm A A
D1
D2
B
B
C1
Figure 6-4. Trapezoid
Figure 6-7. Pincushion
6-3-4 Pinbalance Adjustment
CONDITIONS Scanning frequency: Display image: Brightness: Contrast: 60 kHz/75 Hz Crosshatch pattern Maximum Maximum
6-3-7 Tilt Adjustment
CONDITIONS Scanning Frequency: 60 kHz/75 Hz Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum Click on the << or >> box next to ROTATE to correct the tilt of the display.
D1
| D1 |, |D2 | 2 mm
D1
D2
6-3-8 Degauss
No adjustments are available for the degaussing circuit. The degaussing circuit can effectively function only once per 30 minutes.
Figure 6-5. Pinbalance Click on the << or >> box next to PIN_BAL to optimize the image.
6-3-9 To Delete the User Mode Data
To delete the adjustment data from the user modes, click USER DELETE.
6-3-5 Parallelogram Adjustment
CONDITIONS Scanning Frequency: Display image: Brightness: Contrast: 60 kHz/75 Hz Crosshatch pattern Maximum Maximum
6-3-10 Save the Data
To save the adjustment data for a mode, press FACTORY SAVE.
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6 Alignment and Adjustments
6-4 Color Adjustments
6-4-1 Color Coordinates (Temperature)
Color temperature is a measurement of the radiant energy transmitted by a color. For computer monitors, the color temperature refers to the radiant energy transmitted by white. Color coordinates are the X and Y coordinates on the chromaticity diagram of wavelengths for the visible spectrum. CONDITIONS Measurement instrument: Color analyzer Scanning frequency: 60 kHz/75 Hz Display image: White flat field at center of display area Luminance: Maximum PROCEDURE Use the directions in sections 6-4-2 through 6-4-3 to adjust the color coordinates for: 9300K to x = 0.283 ± 0.02, y = 0.298 ± 0.02 6500K to x = 0.313 ± 0.02, y = 0.329 ± 0.02 Note: If the above adjustments cannot be done to each coordinate, click on the << or >> box next to G_CUT to decrease or increase the green cutoff (bias) and repeat procedures 3 and 4. 6-4-2 (b) G-GAIN ADJUSTMENT
1/3H-1/2H FRONT BEZEL OPENING 1/3V-1/2V BACK RASTER GREEN WINDOW
Figure 6-8. Green Box Pattern CONDITIONS Scanning frequency: Display image: Brightness: Contrast:
60 kHz/75 Hz Green box pattern Maximum Maximum
6-4-2 Color Adjustments for 9300K
6-4-2 (a) BACK RASTER COLOR ADJUSTMENT CONDITIONS Scanning frequency: Display image: Brightness: Contrast:
60 kHz/75 Hz Back raster pattern Maximum Maximum
1. Click on the << or >> box next to G_GAIN to adjust the brightness of the Green Gain to 38 ± 1 ft-L. Note: If you can't increase the Green Gain to the appropriate value, click on the >> box next to increase the ABL point. 6-4-2 (c) WHITE BALANCE ADJUSTMENT CONDITIONS Scanning frequency: Display image: Brightness: Contrast: 60 kHz/75 Hz Full white pattern Maximum Maximum
FRONT BEZEL OPENING BACK RASTER WHITE WINDOW
1. Select COLOR CHANNEL 1 to control the color for 9300K. 2. Adjust the luminance of the back raster to between 0.4 to 0.5 ft-L using the G_CUT controls. 3. Click on the << or >> box next to B_CUT to set the "y" coordinate to 0.298 ± 0.02. 4. Click on the << or >> box next to R_CUT to set the "x" coordinate to 0.283 ± 0.02.
Figure 6-9. Full White Pattern
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6 Alignment and Adjustments 1. Click on the << or >> boxes next to R_GAIN and B_GAIN to make the video white. (For 9300K color adjustment: x = 0.283 ± 0.02, y = 0.298 ± 0.02.) Note: Do not touch the G_GAIN controls. 2. Check the ABL. If it is not within the specifications (35 ± 1 ft-L), use the ABL controls to adjust it. 3. Select COLOR FACTORY SAVE to save the data. 6-4-2 (d) WHITE BALANCE ADJUSTMENT VERIFICATION CONDITIONS Scanning frequency: Display image: X-Y Coordinates: ABL Luminance Brightness: Contrast: 60 kHz/75 Hz Back raster pattern x = 0.283 ± 0.02, y = 0.298 ± 0.02 35 ± 1 ft-L Maximum Maximum
6-4-3 Color Adjustments for 6500K
6-4-3 (a) BACK RASTER COLOR ADJUSTMENT CONDITIONS Scanning frequency: Display image: Brightness: Contrast: 60 kHz/75 Hz Back raster pattern Maximum Maximum
1. Select COLOR CHANNEL 2 to control the color for 6500K. 2. Adjust the luminance of the back raster to between 0.4 to 0.5 ft-L using the G_CUT controls. Note: For 6500K adjustments you must not change the Screen VR of the FBT. To do so changes the 9300K setting values. 3. Click on the << or >> boxes next to R_CUT and B_CUT to adjust the R-Bias to x = 0.313 ± 0.02 and the B-Bias to y = 0.329 ± 0.02. 6-4-3 (b) G-GAIN ADJUSTMENT This procedure is the same as that for 9300K, refer to the procedure on page 6-8. 6-4-3 (c) WHITE BALANCE ADJUSTMENT CONDITIONS Scanning frequency: Display image: Brightness: Contrast: 60 kHz/75 Hz Full white pattern Maximum Maximum
1. Check whether the color coordinates of the back raster satisfy the above spec. If they do not, return to 6-4-2 (a) and readjust all settings. 2. Display a full white pattern. Note: Do not touch the G_GAIN controls.
3. Adjust the Contrast Control on the monitor so that the luminance of the video is about 5 ft-L. 4. Check whether the white coordinates of the video meet the above coordinates spec. 5. Adjust the Contrast Control again so that the luminance of the video is about 24 ft-L. 6. Check whether the white coordinates of the video satisfies the above spec. If they do not, return to 6-4-2 (a) and readjust all settings.
1. Click on the << or >> boxes next to R_GAIN and B_GAIN to make the video white. (For 6500K color adjustment: x = 0.313 ± 0.02, y = 0.329 ± 0.02.) 2. Refer to the procedure for 9300K, section 6-4-2 (c) steps 2 and 3. 6-4-3 (d) WHITE BALANCE ADJUSTMENT VERIFICATION Refer to the procedure for 9300K, section 6-4-2 (d).
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6 Alignment and Adjustments
6-4-4 Luminance Uniformity Check
Luminance is considered uniform only if the ratio of lowest to highest brightness areas on the screen is not less than 7.5:10. CONDITIONS Scanning frequency: Display image: Brightness: Contrast:
CONDITIONS Orientation: Scanning frequency: Display image: Luminance:
Monitor facing east 60 kHz/75 Hz White flat field Cut off point at the center of the display area
60 kHz/75 Hz (1024 x 768) White flat field Cut off point at 24 ft-L Maximum
Note: Color purity adjustments should only be attempted by qualified personnel. PROCEDURE For trained and experienced service technicians only. Use the following procedure to correct minor color purity problems: 1. Make sure the display is not affected by external magnetic fields. 2. Very carefully break the glue seal between the 2-pole purity convergence magnets (PCM), the band and the spacer (see Figures 6-11). 3. Make sure the spacing between the PCM assembly and the CRT stem is 29 mm ± 1 mm.
PROCEDURE Measure luminance at nine points on the display screen (see figure below).
Figure 6-10. Luminance Uniformity Check Locations
4. Display a green pattern over the entire display area. 5. Adjust the purity magnet rings on the PCM assembly to display a pure green pattern. (Optimum setting: x = 0.295 ± 0.015, y = 0.594 ± 0.015) 6. Repeat steps 4 and 5 using a red pattern and then again, using a blue pattern. Table 6-3. Color Purity Tolerances
Red: Green: Blue: x = 0.640 ± 0.015 x = 0.295 ± 0.015 x = 0.142 ± 0.015 y = 0.323 ± 0.015 y = 0.594 ± 0.015 y = 0.066 ± 0.015
6-4-5 Focus Adjustment
CONDITIONS Scanning frequency: Display image: Brightness: Contrast: 60 kHz/75 Hz (1024 x 768) "H" character pattern Cut off point Maximum
PROCEDURE 1. Adjust the Focus VR on the FBT to display the sharpest image possible. 2. Use Locktite to seal the Focus VR in position.
6-4-6 Color Purity Adjustment
Color purity is the absence of undesired color. Conspicuous mislanding (unexpected color in a uniform field) within the display area shall not be visible at a distance of 50 cm from the CRT surface.
(For 9300K color adjustment: x = 0.283 ± 0.02, y = 0.298 ± 0.02)
7. When you have the PCMs properly adjusted, carefully glue them together to prevent their movement during shipping.
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6 Alignment and Adjustments
6-5 Convergence Adjustments
Misconvergence occurs when one or more of the electron beams in a multibeam CRT fail to meet the other beams at a specified point. Table 6-4. Misconvergence Tolerances Position Center (A) Edge (B) Error in mm 0.30 0.40 CRT Dot Pitch
230 MM B A
0.28 0.28
306 MM
1 11
Figure 6-13. Convergence Measurement Areas
6-5-1 Static (Center) Convergence
CRT FRONT
10
2 3 4 5 6 7 8 9
Static convergence involves alignment of the red, blue and green lines in the center area of the display. See "Dynamic Convergence" for alignment of the color fields around the edges of the display. CONDITIONS Direction: Warm-up: Display image: Tolerances:
Samsung SDD CRT
1 Setup Bolt 5 Spacer 9 Holder 2 Bow Magnet 6 4-Pole Magnet 10 Band 3 Band 7 Spacer 11 Tabs 4 2-Pole Magnet 8 6-Pole Magnet
Monitor facing east 30 minutes Crosshatch pattern See Table 6-4
Figure 6-11. Magnet Configuration
PROCEDURE As shown in Figure 6-11, the CRT used in these monitors has the same magnet configuration as shown in Table 6-5 below. Table 6-5. Magnet Order
1 11
CRT Manufacturer SDD
CRT FRONT
Magnet Order from Front of CRT Convergence bow, 2-pole, 4-pole, 6-pole Convergence bow, 2-pole, 6-pole, 4-pole
Toshiba
10
2 3 4 5 6 7 8 9
Use the following steps to correct any static misconvergence: 1. Make sure the display is not affected by external magnetic fields. 2. Locate the pair of 4-pole magnet rings. 3. Unlock the rings and rotate the individual rings (change the spacing between tabs) to converge the vertical red and blue lines. 4. Rotate the pair of rings (maintaining the spacing between tabs) to converge the horizontal red and blue lines.
Toshiba CRT
1 Setup Bolt 5 Band 9 Holder 2 Bow Magnet 6 6-Pole Magnet 10 Band 3 Spacer 7 Spacer 11 Tabs 4 2-Pole Magnet 8 4-Pole Magnet
Figure 6-12. Toshiba Magnet Configuration
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6 Alignment and Adjustments 5. After completing the red and blue center convergence adjustment, locate the pair of 6-pole magnet rings. 6. Rotate the individual rings (change the spacing between tabs) to converge the vertical red and blue (magenta) and green lines. 7. Rotate the pair of rings (maintaining the spacing between tabs) to converge the horizontal red and blue (magenta) and green lines. Don't rotate the 2-pole magnets as they adjust for color purity. 8. Mark the correct position for the magnets and apply a small line of glue to hold the magnets in place. Lock the rings in place. 1. Make sure the display is not affected by external magnetic fields. 2. Make sure the static convergence is properly adjusted. 3. Strategically place small rubber magnets on the back of the CRT to correct the misconvergence. Be careful not to remove the paper protecting the adhesive on the magnets until you are satisfied with their placement and the dynamic convergence. 4. When you are satisfied with the convergence around the edge of the CRT, permanently glue the magnets to the back of the CRT. WARNING: Do not remove or change the position of the factory installed wedges. These wedges were installed by the CRT manufacturer and are properly placed for this CRT; their removal may result in damage to the CRT.
6-5-2 Dynamic (Edge) Convergence
Use the following procedure to correct minor dynamic (edge) misconvergence. If, after using this procedure, dynamic misconvergence around the periphery of the display area is still greater than the tolerance, contact the Regional After Service Center for possible CRT replacement.
!
Figure 6-14. Magnet Movements Red and Blue Alignment (4-pole magnet movement)
O-Magnetic Field
Red, Blue and Green Alignment (6-pole magnet movement)
RB
(1) SPREAD
VERTICAL MISALIGNMENT
M
G G RB
TAB MAGNET
B R
HORIZONTAL MISALIGNMENT
OR
Motion (1)
R B B R
SHIFT DIRECTION OF CROSSHATCH PATTERN
M
G G RB
Motion (2)
R B B R
SHIFT DIRECTION OF CROSSHATCH PATTERN
M G M
G
MOVE TOGETHER
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6 Alignment and Adjustments
6-5-3 Bow Convergence Adjustments
CONDITIONS Orientation: Monitor facing east. Display Image: Crosshatch pattern with mixed RGB colors. Required tools: Flat-head () screwdriver, 1.5 mm Philips (+) screwdriver, 1.5 mm Hexkey, 2.5 mm PROCEDURE Bow convergence adjustments are not available for the CRTs used in the CKG7507L monitor. While all CRTs have bow convergence magnets, they are sealed in the CRT factory and are not user or service technician adjustable. Do not touch these magnets (see Figures 6-11 and 6-12). If bow convergence adjustment is out of alignment, replace the CRT. Bow misconvergence should not exceed the values listed in Table 6-5: Misconvergence Tolerances.
6-5-4 (a) HORIZONTAL LINE RED AND BLUE BALANCE CONVERGENCE
BLUE RED
Figure 6-17. Horizontal Line Balance Misconvergence Use a 2.5 mm hexkey at the Horizontal Balance Coil (XV). Turning it right raises the right end of the blue line and lowers the left end. Turning the VR to the left lowers the right end of the blue line and raises the left end. 6-5-4 (b) VERTICAL RED AND BLUE BALANCE CONVERGENCE
BLUE RED
6-5-4 Balance Convergence Adjustments
Balance Convergence involves alignment of red and blue lines when they are misaligned at one end more so than at the other end. The Deflection Yoke holds the balance coils which can correct balance misconvergences. HORIZONTAL BALANCE COIL Figure 6-18. Vertical Line Balance Misconvergence Use a 1.5 mm screwdriver (flat-head [] for SDD DYs and phillips type [+] for Toshiba DYs) at the YH variable register. Turning the VR left tilts the blue line to the right. Turning it right tilts the blue line to the left. 6-5-4 (c) UPPER AND LOWER HORIZONTAL LINE CONVERGENCE
YH Xv Yv
Figure 6-15. SDD Deflection Yoke
RED BLUE
RED BLUE
Figure 6-19. Upper and Lower Balance Misconvergence Use a 1.5 mm screwdriver (flat-head [] for SDD DYs and phillips type [+] for Toshiba DYs) at the Yv variable register. Turning the VR to the left moves the blue line at the top upward and at the bottom, the line moves downward. Turning it right moves the blue line at the top downward and at the bottom, the line moves upward.
YH YH
YVYV
XV XV Figure 6-16. Toshiba Deflection Yoke
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6 Alignment and Adjustments
Memo
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