PIONEER PT – 51 G 36 CE–E Service Manual

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ORDER NO. MTNC010307C1

Service Manual

Color Video Projection System

Main Manual

(P6)

Panasonic

Models	Chassis
PT-51G36E	AP822
PT-51G36CE	AP822

Note: Refer to Technical Guide (P6) for functional descriptions and Block Diagrams.

(MTNC010308G1).

This Service manual is issued as a service guide for the models of the P6 family listed above. Included in this manual are a set of schematics, alignment procedures, disassembly procedures and a complete parts list.

“WARNING! This Service Manual is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.

Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”

The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this Main Manual.

	Copyright 2001 by Matsushita Electric Corporation of
	America. All rights reserved. Unauthorized copying
®	and distribution is a violation of law.
®

CRT Set Up

CAUTION: Insure yoke plugs on the A-Board are reconnected before turning the PTV ON to prevent damage to the horizontal output transistor and/or CRTs.

1.Connect test generator to the antenna terminal and set for a monoscope pattern.

2.Loosen yoke clamp, seat yoke against bell of CRT and rotate to correct yoke tilt (compare to adjacent CRT). Tighten yoke clamp.

3.Remove adhesive from centering tabs and set centering tabs for zero correction. (Figure 21)

Centering Magnets

Adhesive

Figure 21. Adhesive Removal

4.Cover replacement CRT lens and static converge the tubes not replaced, if needed. Check size and linearity of pattern and adjust as required.

5.Uncover replacement CRT lens and cover other two CRT lenses. Adjust electrical and optical focus (lens), if required.

6.Uncover all CRT lenses and use yoke centering magnet to converge replacement CRT (in center area of screen only) with other two CRTs. Disregard non-convergence in areas other than center area.

7.Perform White Balance adjustments.

Dynamic Focus Adjustments

1.Focus adjustments should be performed after 1 hour of aging.

2.Use oscilloscope with 100 : 1 probe.

3.Apply monoscope pattern.

4.Adjust the red, blue and green focus VR on the focus block for best focus of overall picture of each CRT. (Figure 24)

16.7ms (V Rate)

350_V ± 100_V

B		550_V ± 100_V

Figure 22. D. Focus Adjustment Waveform

5.Connect the scope probe to TPA16, GND to TPA17. Scope set at 20V/div & 5m sec/div.

6.Confirm that level of A is 550_V ± 100_V and B is 350_V ± 100_V.

If level of A and B are not within the specification adjust as follows:

1. Enter to DAF-MODE as follows:

•On Service Mode DAC V02 press Vol

2. DAF4 (H_DAF) appears, adjust by pressing Vol , until waveform is within specification.

3.Set DAF6 (V_DAF) by pressing TV/VIDEO on the remote until appears.

4.Adjust by pressing Vol , . until waveform is within specification.

5.Then press ACTION (Menu appears), press ACTION to save changes or other button to exit without saving.

6.Proceed with Focus Adjustments.

Focus - Electrical & Optical Adjustments

(use for minor adjustment or for final adjustment, for complete adjustment see following section.)

Electrical Adjustment

1. Apply NTSC monoscope pattern.

A B

Adjust electric focus VR and lens focus on this circle

Figure 23. Lens focus adjustment

Table 4: Focus Points

	RED	GREEN	BLUE


Electric focus	B	A/B	A

Optical Focus	B	A/B	A

2.Cover the green and blue CRTs, projecting red only. The electrical focus controls are located on the front (Figure 23). Adjust the red focus VR for best focus as indicated in Table 4).

			Screen
+	+	+


R	G	B	Focus
+	+	+

R	G	B

Figure 24. Focus Pack

3.Adjust red lens focus (mechanical) until focus is best.

4.Adjust red focus VR again.

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5.Repeat for blue focus VR while projecting blue only.

6.Repeat for green.

Focus - Optical Lens Adjustment

Optical Adjustments

Note: This adjustment normally should not require resetting unless the lens has been replaced or adjustment has changed.

1.Optical focus adjustment is located on the top of each CRT lens system. Loosen the adjustment knurled locking knob. (Figure 25)

Adjustment knurled

locking knobs

REAR VIEW

Figure 25. Optical Lens focus Adjustment

2.Turn the PTV ON. Apply and view a monoscope pattern.

3.Adjust each lens focus for best focus while viewing each CRT.

4.Cover the red and blue CRT, projecting green only. Rotate the green lens for best focus around screen center area.

5.Do the same for the red focus lens while projecting red only.

6.Repeat for blue.

Electric & VM Focus Adjustment, Complete adjustment

(Perform this adjustment when a CRT is replaced or when major adjustment is required) Preparation:

1.NTSC monoscope pattern.

2.NTSC cross hatch pattern with dots (pincushion).

3.Set DAC D0f from 0 to 1 (disabling digital convergence.)

4. Position the longer tab of the four-pole magnet to 90 degrees (uncorrected position). (See Figure 27).

6-pole magnet (Dummy ring)

4-pole magnet Alignment magnet

Figure 26. VM Coil with focus correction magnet

Set 90 degrees

Figure 27. 4-pole magnet

5.Position the long tab of all alignment magnets and of the dummy ring together in an uncorrected position. (See Figure 28).

Figure 28. Alignment magnet

(or dummy ring)

Procedure:

1.Apply an NTSC cross hatch pattern with dots.

2.Assure that digital convergence is disabled (Dac D0F from 0 to 1).

3.Project red only. (Cover green and blue CRTs.)

4.Turn the red electrical focus adjustment VR (on focus pack) fully counterclockwise and note the

position of the dots at the center of the picture.

5. Turn the red electrical focus adjustment VR fully clockwise.

6.If the position of the dots at the center of the screen moves from the position noted in step 4., adjust the four pole magnets until the dots are in the same position as noted in step4.

7.Turn the red electrical focus adjustment VR (on focus pack) fully counterclockwise and confirm that the position of the dots at the center of the screen did not move from their position noted in ste p6.

8.If the position of the dots at the center of screen moved, repeat from step 4.

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9.If the position of the dots moved after repeated adjustments, adjust until the movement of the dots is minimized.

10.Turn the red focus VR fully clockwise.

11.Adjust the 4-pole magnets until the shape of the dots at the center of the screen is circular.

12.Adjust red focus VR until optimum focus is achieved.

13.Apply NTSC monoscope pattern.

14.If the center of the monoscope pattern is not inside the 15.0mm circle, shown in Figure 29, adjust the centering magnets. Repeat the alignment magnet adjustments and four pole magnet adjustments (step 1. ~ step 12.).

6.Remove lens covers and enable digital convergence by changing Dac D0F from 1 to 0.

3.0

1.0

Figure 30. Vertical Size Adjustment

Figure 29. Centering magnet

15.Apply an NTSC cross hatch pattern with dots.

16.Cover red and blue lenses projecting green only.

17.Repeat above procedures for the green.

18.Enable digital convergence by changing DAC D0f from 1 to 0.

19.Following adjustments, paint position of DY centering magnets and fix the centering magnets of DY, dummy rings of VM coil, four pole magnets of VM coil and the alignment magnets of VM coil to prevent them from moving.

Note: Please See “Service Mode (Electronic Controls)” on page 25 for entering and exiting Service Mode.

Vertical Size Adjustment (D00)

1.Apply an NTSC monoscope pattern.

2.Cover red and blue lenses.

3.Set DAC D0F from 0 to 1 (disabling digital convergence).

4.Adjust centering magnets so that the center of pattern get aligned with screen frame center.

5.Adjust DAC D00 (V_Size) until vertical size is 4.0±0.1 on top and bottom lines. (See Figure 30)

Horizontal Phase Adjustment

1.Apply a monoscope pattern.

2.Set DAC D0F from 0 to 1 (disabling digital convergence).

3.Cover both red and blue lens so that only the green lens is projecting the monoscope pattern.

4.Change H-Size DAC data (D03) to 63 (H_Size is minimum).

5.Turn Green Screen control clockwise (Figure 24) until all deflecting area appear.

6.Adjust H-Position DAC data (D04) until left size is 6±0.1.

Picture	Screen
Area	Frame
	Deflecting
	Area

Figure 31. H Phase Adjustment

7.Turn Green Screen control counter clockwise (Figure 24) until the area between deflecting area and picture area disappear.

8.Enable digital convergence by changing DAC D0F from 1 to 0.

9.Remove lens covers.

Trapezoid Adjustment (D06)

Procedures:

1. Cover Red and Blue Lenses.

1.Apply a crosshatch pattern.

2.Set DAC D0F from 0 to 1 (disabling digital convergence).

3.Adjust DAC D06 (trapezoid) by pressing VOL rightleft to correct image (See Figure 32).

Correct Adjustment

Incorrect Adjustment

Figure 32. Trapezoid Adjustment

4. Enable digital convergence by changing DAC D0F from 1 to 0 and remove caps from lenses.

Service Manual	- 18 -

Pincushion Adjustment (D05)

Procedure:

1.Cover Red and Blue Lenses.

2.Apply a crosshatch pattern.

3.Set DAC D0F from 0 to 1 (disabling digital convergence).

4.Adjust DAC D05 (Pincushion) by pressing CH updown and confirm that size is 30±5mm at “A” (See Figure 33)

“A”

Figure 33. Pincushion Adjustment

5.If Trapezoid adjustment is required after this adjustment, perform trapezoid adjustment.

6.Enable digital convergence by changing DAC D0F from 1 to 0 and remove caps from lenses.

Centering Magnets Adjustment

Procedures:

1.Apply a monoscope pattern.

2.Cover the red and blue lens so only the green lens is projecting the monoscope pattern.

3.Set DAC D0F from 0 to 1 (disabling digital convergence).

4.Loosen the deflection coil screw on the green CRT.

5.Adjust green deflection coil until the horizontal center line is in line with the grid and is leveled.

6.Adjust centering magnets until the green pattern is equal on left and right. Adjust also for horizontal and vertical tilt.

Note: Push deflection coil to top of CRT neck, then tighten deflection screw after adjusting each CRT centering and Tilt.

7.Transfer lens cover from red to green and project red only. Adjust deflection coil until the horizontal center line matches the pattern of the grid and is leveled.

8.Adjust red centering magnets until the monoscope pattern center is at the appropriate distance as indicated on Figure 34.

R G B

d d

d measured in mm

PT-51” 28 mm

PT-61” 17 mm

Figure 34. Centering Magnets Adjustment.

9.Transfer lens cover from blue to red, so that blue is projected.

10.Adjust blue deflection coil until the horizontal center line matches the pattern of the grid and is leveled.

11.Adjust blue centering magnets until the monoscope pattern center is at the appropriate distance as indicated on Figure 34.

12.Enable digital convergence by changing DAC D0F from 1 to 0.

13.Following the adjustment, make sure that all deflection coils are pushed completely toward the CRT cones and that all screws are tightened.

Horizontal Size Adjustment (D03)

This is the manual adjustment of horizontal size that is included in the automatic convergence adjustment.

1.Apply a monoscope pattern.

2.Set DAC D0F from 0 to 1 (disabling digital convergence).

3.Cover both red and blue lens.

4.In service mode, adjust H-Size DAC (D03) until the picture horizontal size is 5.0 ± 0.2 lines at left side of screen.

5.Enable digital convergence by changing DAC D0F from 1 to 0.

6.Remove lens covers.

Convergence Adjustment

Note: It is strongly recommended to first read and understand the following section prior to make any adjustment.

Turn PTV on and allow it to warm up for 30 minutes prior to making adjustments (WHITE PATTERN).

Note: This PTV uses the scheme described below to correct for misconvergence of the three CRT projection tubes. There are various modes to this operation.

Preparation:

Place the Convergence Alignment Template (see “Convergence Alignment Template” on page 24) over the PTV screen. Align the center lines of the template with the mechanical center markers on the PTV screen frame. If the template is not available, create one using the dimensions provided in “Convergence Alignment Template” on page 24.

Remote control must be used during the procedure.

Note: Apply the Convergence Alignment Template to the PTV screen frame to converge the Green Raster only. Remove the Convergence Alignment Template following this alignment. The red and blue rasters can then be aligned to the green raster.

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Raster Setup:

1.Cover Red & Blue lens with caps.

2.Apply an NTSC monoscope pattern.

3.Select DAC V00, then press VOL right or left to enter to “CONVERGENCE ADJ” mode.

4.Press “0” key on remote.

5.Press ACTION key on remote to enter to “TEST_POS” mode.

6.Move pattern by pressing VOL right - left and CH up - down so that the cursor center overlap monoscope pattern center.

Figure 35. Aligning cross-hair cursor with monoscope pattern

7.Press “5” key on remote to exit superimpose mode (monoscope pattern disappear).

8.Press “TV/VIDEO” key to enter “DATA_POS” mode

9.Adjust by pressing VOL right - left so that peak of curve is the same position as center of cursor.

Figure 36. Symmetrical shape

10.Press “TV/VIDEO” key on remote to enter “OSD_POS” mode.

11.Press “5” key on remote so that monoscope pattern appears (superimpose mode)

12.Move cursor by pressing VOL right - left and CH up - down so that cursor center overlap monoscope pattern center

13.Press “0” key to go back to “CONVERGENCE ADJ” mode.

14.Press “TV/VIDEO” key to cycle through “COARSE ADJ. MODE” options.

Static Size Skew Linear

Corner Pin Key

Figure 37. Coarse modes cycle

15.To change to “FINE ADJUSTMENT MODE” options (DAC V01), press “TV/VIDEO” key on remote for at least 3 seconds, to go back to “COARSE ADJ MODE” options press “TV/VIDEO” on remote again for 3 seconds.

16.In “FINE ADJUSTMENT MODE” options, press “MUTE” key on remote to switch between “cursor” mode and “data” mode.

•Cursor mode: Allows cursor movement by pressing VOL right - left and CH up - down.

•Data mode: Allows making adjustment by pressing VOL right - left and CH up - down.

17.Either “COARSE ADJUSTMENT MODE” options or “FINE ADJUSTMENT MODE” options, press “R- TUNE” repeatedly key on remote to cycle through different color adjustments (R,G,B,White)

18.To store adjustments press “7”, then “ACTION” key on remote, otherwise press “POWER” then “ACTION” to exit adjustments without saving.

19.Remote Functions:

• 1, 3. . . . . . . . . . .change color view adj

• 2. . . . . . . . . . . . . . . . . . change pattern

• 7. . . . . . . . . . . . . . . . . . . . . . . save data

• 5. . . . . . . . . . . . . . . . . . . . . . . . . overlap

• POWER . . . . . . . . . . . . . . . . . . . . to exit

• RECALL . . . . . . . . . . . . display values

• R-TUNE . . . . . . . . . . . . . . . cycle colors

• TV/VIDEO . . . . . . . . . . . . change mode 3 secs. . . . . . . change options

Coarse Adjustment Mode

Note: It is strongly recommended to first read and understand the following section prior to make any adjustment.

Procedure:

1.Enter to “G-Size” mode:

•DAC V00

•VOL right or left

•TV/VIDEO (repeatedly)

•R-TUNE (repeatedly)

2.Press “2” repeatedly and apply the pattern of border and cross.

3.Press RECALL to display values

4.Adjust size so that the line of the border closes to the screen frame at top, bottom, left and right by pressing CH up-down and VOL right-left.

Figure 38. H & V Size Adjustment

5.Press “7” then “ACTION” key on remote to save changes.

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6.Enter to linearity “G-LINEAR” mode by pressing “TV/VIDEO”.

7.Adjust linearity by pressing VOL right-left until A=B (See Figure 39)

Figure 39. Linear Mode Adjustment

8.Press “7” then “ACTION” key on remote to save changes.

9.Enter to PIN “G-PIN” mode by pressing “TV/ VIDEO”.

10.Adjust V_PIN by pressing CH up-down (See Figure 40).

11.Adjust H_PIN by pressing VOL right-left.

12.Press “7” then “ACTION” key on remote to save changes.

Figure 40. H & V PIN Adjustment

13.Enter to CORNER “G-CORNER” mode by pressing TV/VIDEO.

14.Adjust by pressing VOL right-left (See Figure 41).

15.Press “7” then “ACTION” key on remote to save changes.

18.Press “7” then “ACTION” key on remote to save changes

Figure 42. KEY mode adjustment

Note: Confirm that pattern looks like a square and almost overlaps the screen frame, check that vertical and horizontal line center match with the marks on screen frame, if linearity is not good enough, repeat adjustments.

19.Enter to “STATIC” mode by pressing TV/VIDEO.

20.Press “1” or “3” repeatedly until green and red only are shown.

21.Adjust “R-STATIC” so that the center of red overlaps with the center of green.

Red	Green

Figure 43. STATIC mode adjustment

22.Enter to SKEW “R-SKEW” mode by pressing TV/ VIDEO

23.Adjust “R-SKEW” so that the vertical and horizontal line of center overlaps with green (See Figur e44)

24.Press “7” then “ACTION” key on remote to save changes.

Figure 41. Corner Adjustment

16.

Enter to KEY “G-KEY” mode by pressing TV/

Figure 44. SKEW adjustment

VIDEO.

17.

Adjust by pressing CH up-down (See Figure 42)

Note: Remember always save data following each

adjustment by pressing “7” key on remote, then

ACTION.

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25.Enter to LINEARITY “R-LINEAR” mode by pressing TV/VIDEO.

26.Adjust Horizontal linearity (See Figure 39)

27.Enter to SIZE “R-SIZE” mode by pressing TV/ VIDEO

28.Adjust so that the line on the border closes to the screen frame at top, bottom, left and right (See Figure 38)

29.Enter to PIN “R-PIN” mode by pressing TV/VIDEO

30.Adjust horizontally and vertically (See Figure 40)

31.Enter to CORNER “R-CORNER” mode by pressing TV/VIDEO.

32.Adjust corners (See Figure 41)

33.Enter to KEY “R-KEY” mode by pressing TV/ VIDEO

34.Adjust KEY (See Figure 42)

35.Display pattern of border and cross, then check that red overlaps green pattern, if it is not satisfactory, repeat from step 19.

36.Enter to STATIC “B-STATIC” mode.

37.Press “1 or 3” key repeatedly on remote until only green and blue pattern are displayed

38.Adjust B-STATIC so that the center of blue overlaps with the center of green (See Figure 45).

Blue	Green

Figure 45. B-STATIC adjustment

39.Perform all adjustments for Blue (B-SKEW, B- LINEAR, B-SIZE, B-PIN, B-CORNER, B-KEY)

40.Display Border and cross pattern and confirm that blue overlaps with green pattern, if it is not satisfactory, repeat for blue.

41.Press “1 or 3” key repeatedly on remote until Green, Red and Blue (White), confirm that red and blue overlaps with green pattern.

42.Press “7” key on remote, then ACTION to save changes.

43.Press POWER then ACTION to exit adjustments or press TV/VIDEO for at least 3 seconds to change to Fine Adjustment Mode.

Fine Adjustment Mode (V01) (Convergence)

Note: It is strongly recommended to first read and understand the following section prior to make any adjustment.

Helpful Hint:

The easiest way to adjust convergence is to begin from the center of the screen, to the border in all the convergence adjustments.

Remote Functions:

• 1, 3. . . . . . . . . . .change color view adj

• 2. . . . . . . . . . . . . . . . . . change pattern

• 7. . . . . . . . . . . . . . . . . . . . . . . save data

• 5. . . . . . . . . . . . . . . . . . . . . . . . . overlap

• POWER . . . . . . . . . . . . . . . . . . . . to exit

• RECALL . . . . . . . . . . . . display values

• R-TUNE . . . . . . . . . . . . . . . cycle colors

• TV/VIDEO . . . . . . . . . . . . change mode 3 secs. . . . . . . change options

• MUTE (“fine”) . . . cursor & data mode

In “FINE ADJUSTMENT MODE” options, press “MUTE” key on remote to switch between “cursor” mode and “data” mode.

•Cursor mode (cursor flashing): Allows cursor movement by pressing VOL right - left and CH up - down.

•Data mode (cursor fixed): Allows making adjustment by pressing VOL right - left and CH up - down.

Procedure:

1.Enter to “G-EASY” mode (for green):

•DAC V01

•VOL right or left

•TV/VIDEO (repeatedly)

•R-TUNE (repeatedly)

2.Press “2” repeatedly and apply the pattern of crosshatch.

3.Press “1 or 3” repeatedly until the pattern becomes green.

4.Press RECALL to display values.

5.In “EASY” mode, the adjustment value changes by 4 steps

6.EASY mode allows to move lines horizontally and vertically from the center of cursor.

Cursor

Figure 46. EASY adjustment cursor Positions

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PIONEER PT – 51 G 36 CE–E Service Manual

7.This mode afects a wide area around the cursor than other adjustment modes, See values on screen by pressing RECALL on remote (seeFigure 47)

8.Begin adjustment from the center to the edge of the screen.

9.Adjust by pressing CH up/down and VOL right/lef on the remote control when the cursor is not blinking, if the cursor is blinking press MUTE on the remote.

left/right

up/down

Figure 47. EASY adjustment

10.To move the cursor press MUTE on the remote (cursor blinks), then move the cursor to any of the 9 positions for “EASY” mode(see Figure 46)

11.This adjustment may help to make rounded lines become straight lines

12.Adjust to make lines as straight as possible

13.Enter to POINT “G-POINT” (for green) mode by pressing TV/VIDEO.

14.“POINT” mode allows to move line horizontally and vertically from the perimeter of cursor making rounded lines become straight (See Figure 48)

15.In “POINT” mode, the adjustment data changes by 2 steps, See values on screen by pressing RECALL on remote.

Screen

Frame

Cursor

Blinks

Figure 48. POINT & ORIG. POINT cursor positions

16.When the cursor is located in the outer area of the border the cursor starts to blink from one side to other and the adjustment is for the non-visible area (inside the ovals area, see Figure 48); This applies to “POINT” & “ORIGIN. POINT” modes.

17.Begin adjustment from the center to the edge of the screen.

left/right

up/down

Figure 49. POINT & ORIG. POINT adjustment

18.Adjust to make lines as much straight as possible

19.When slightly adjustment is needed, use “ORIG. POINT” mode.

20.To enter to “G-ORIG. POINT” (for green) mode press TV/VIDEO.

21.With “ORIG. POINT”, the adjustment data changes by 1 step, this allows more detail in the adjustment. See values on screen by pressing RECALL on remote

22.Confirm that green adjustment is good enough, if adjustment is not satisfactory, repeat adjustments.

23.Enter to LINE “G-LINE” mode by pressing TV/ VIDEO.

24.LINE mode allows to move each single line horizontally and vertically (See Figure 51).

25.Begin adjustment from the center to the edge of the screen (see Figure 50)

26.Adjust to make distribute lines

Screen

Frame

Figure 50. LINE adjustment cursor Positions

27.Then press “1 or 3” on the remote until red and green appears.

Note: Since convergence adjustment will not allows to adjust every single cross section of the grid, it is very important to adjust, so that overall looks best.

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