Toshiba 32ZD26P Service Manual

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WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON PAGE 3 OF THIS MANUAL.

GENERAL ADJUSTMENTS

SET-UP ADJUSTMENT
s The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in order as follows : 1. Color Purity 2. Convergence 3. White Balance Note: The PURITY/CONVERGENCE MAGNET assembly and rubber wedges need mechanical positioning. Refer to figure 1. Mounting position of the purity magnet assembly should fit to same position as old one because slightly difference to the position depend on a kind of tube.

SPECIFIC INFORMATIONS

*

There are no adjustment of purity and convergence in some picture tube (Unified with purity magnet) 5. Remove the Rubber Wedges. 6. Rotate and spread the tabs of the purity magnet (See figure 2.) around the neck of the picture tube until the green belt is in the center of the screen. At the same time, enter the raster vertically. 7. Slowly move the yoke forward or backward until a uniform green screen is obtained. Tighten the clamp screw of the yoke temporarily. 8. Check the purity of the red and blue raster.

COLOR PURITY ADJUSTMENT NOTE : Before attempting any purity adjustments, the receiver should be operated for at least fifteen minutes. 1. Demagnetize the picture tube and cabinet using a degaussing coil. 2. Set the brightness and contrast to maximum. 3. Use a green raster from among the built-in test signals. 4. Loosen the clamp screw holding the yoke and slide the yoke backward or forward to provide vertical green belt (zone) in the picture screen.

DEFLECTION YOKE

TEMPORARY MOUNTING

29.1mm(28", 29") 25mm(25") 19mm(19", 20", 21") 14mm(13", 14")

RUBBER WEDGE

ADHESIVE PURITY/ CONVERGENCE MAGNET ASS'Y GLASS CLOTH TAPES

DEFLECTION YOKE

Figure 1.

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6-POLE MAGNETS 4-POLE MAGNETS ADJUST THE ANGLE (VERTICAL LINES) FIXED

ROTATE TWO TABS AT THE SAME TIME (HORIZONTAL LINES) PURITY MAGNETS CONVERGENCE MAGNET ASSEMBLY ADJUSTMENT OF MAGNETS

Figure 2.
BLU RED RED/BLU GRN

BLU RED

RED/BLU GRN

4-POLE MAGNETS MOVEMENT

6-POLE MAGNETS MOVEMENT

Center Convergence by Convergence Magnets

BGR R G B B G R

B G R

RGB

BGR

RGB INCLINE THE YOKE UP (OR DOWN)

R G B

INCLINE THE YOKE RIGHT (OR LEFT)

Circumference Convergence by DEF Yoke

Figure 3. Dot Movement Pattern

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SPECIFIC INFORMATIONS

s CENTER CONVERGENCE ADJUSTMENT 1. Use the cross-dot pattern from among the built-in test signals. 2. Set the brightness and contrast for well defined pattern. 3. Adjust two tabs of the 4-Pole Magnets to change the angle between them (See figure 2.) and superimpose red and blue vertical lines in the center area of the picture screen. 4. Turn the both tabs at the same time keeping the angle constant to superimpose red and blue horizontal lines at the center of the screen. 5. Adjust two tabs of 6-Pole Magnets to superimpose red/ blue line and green one. Adjusting the angle affects the vertical lines and rotating both magnets affects the horizontal lines. 6. Repeat adjustments 3, 4, 5 keeping in mind red, green and blue movement, because 4-Pole Magnets and 6-Pole Magnets have mutual interaction and make dot movement complex.

GENERAL ADJUSTMENTS

CONVERGENCE ADJUSTMENTS NOTE: Before attempting any convergence adjustments, the receiver should be operated for at least fifteen minutes.

s CIRCUMFERENCE CONVERGENCE ADJUSTMENT 1. Loosen the clamping screw of deflection yoke slightly to allow the yoke to tilt. 2. Temporarily put a wedge as shown in figure 1. (Do not remove cover paper on adhesive part of the wedge.) 3. Tilt front of the deflection yoke up or down to obtain better convergence in circumference. (See figure 3.) Push the mounted wedge into the space between picture tube and the yoke to fix the yoke temporarily. 4. Put other wedge into bottom space and remove the cover paper to stick. 5. Tilt front of the yoke right or left to obtain better convergence in circumference. (See figure 3.) 6. Keep the yoke position and put another wedge in either upper space. Remove cover paper and stick the wedge on picture tube to fix the yoke. 7. Detach the temporarily mounted wedge and put it in another upper space. Stick it on picture tube to fix the yoke. 8. After fixing three wedges, recheck overall convergence. Tighten the screw firmly to fix the yoke and check the yoke is firm. 9. Stick three
adhesive tapes on wedges as shown in figure 1.

SERVICE MODE
GENERAL ADJUSTMENTS
1. ENTERING TO SERVICE MODE 1) Press o button once on Remote Control. 2) Press o button again to keep pressing. 3) While pressing the o button, press MENU button on TV set.
Item Data S

Mute or (Service mode display)

2. DISPLAYING THE ADJUSTMENT MENU 1) Press MENU button on TV.
Adjustment mode ITEM DATA Item Data Press Press Service mode S

SPECIFIC INFORMATIONS

3. KEY FUNCTION IN THE SERVICE MODE The following key entry during display of adjustment menu provides special functions. A single horizontal line ON/OFF: Test signal selection : Selection of the adjustment items : Change of the data value : Adjustment menu mode ON/OFF : Initialization of the memory (QA02) : Reset the count of operating protect circuit to "00": "RCUT" selection : "GCUT" selection : "BCUT" selection : "CNTX" (or "SCNT") selection : "COLC" selection : "TNTC" selection : Self diagnostic display ON/OFF : INFO button (on Remote) or a button (on TV) a button (on Remote) Channel s/t (on TV or Remote) Volume ; +/­ (on TV or Remote) MENU button (on TV) CALL + Channel button on TV (s) CALL + Channel button on TV (t) 1 button 2 button 3 button 4 button 5 button Color thickness correction 6 button note: Displayed differently as shown below, de9 button pending on the setting of the receiving color system. COLP (PAL) COLC (NTSC) COLS (SECAM)

CAUTION : Never try to perform initialization unless you have changed the memory IC.

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