background image

Panasonic

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

Service Manual

Color Video Projection System

(P6)

Main Manual

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

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.” 

Chassis

PT-51G36E      AP822
PT-51G36CE      AP822

Models

ORDER NO. MTNC010307C1
B2

®

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.

Note: Refer to Technical Guide (P6) for
functional descriptions and Block Diagrams.
(MTNC010308G1).

Summary of Contents for PT-51G36CE

Page 1: ...se 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 Chassis PT 51G36E AP822 PT 51G36CE AP822 Models ORDER NO MTNC...

Page 2: ...cture of each CRT Figure 24 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 wavefo...

Page 3: ...ole magnet to 90 degrees uncorrected position See Figure 27 5 Position the long tab of all alignment magnets and of the dummy ring together in an uncorrected position See Figure 28 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 foc...

Page 4: ...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 6 Remove lens covers and enable digital convergence by changing Dac D0F from 1 to 0 Horizontal Phase Adjustment 1 Apply a monoscope pattern 2 Set DAC D0F from 0 to 1 disabling digital convergence 3 Cov...

Page 5: ...ntering 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 i...

Page 6: ...ote 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 ...

Page 7: ...y pressing CH up down See Figure 42 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 re...

Page 8: ...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 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 cha...

Page 9: ...or 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 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...

Page 10: ...e is 3 5 0 1 lines at C and D as indicated in Figure 52 Convergence Alignment Template The Convergence Alignment Template is a grid approximately the size of the viewing screen used to ensure the proper size and shape of the alignment rasters It is 6 blocks across by 6 blocks high The grid dimensions vary with the mode of operation Apply a Convergence Alignment Template to the viewing screen of th...

Page 11: ...7 Press Power on the Remote Control to select one of the Service Adjustment Modes 1 B Service VCJ SUB DATA ADJUSTMENTS 2 C Service VCJ CUT OFF ADJUSTMENTS 3 D Service PINCUSHION ADJUSTMENTS 4 P Service PIP ADJUSTMENTS 5 S Service S OPTION ADJUSTMENTS 6 X Service X OPTION ADJUSTMENTS 7 V Service Y OPTION ADJUSTMENTS 8 CHK Normal operation of CHANNEL and VOLUME Exiting the Service Mode Press the Act...

Page 12: ...eo FIXED 15 B0B Sub Sharpness Component FIXED 20 B0C Sub Contrast Table 5 Service Adj B00 B0C Service Adjustment Adj Range Default Level C00 R Cutoff 0 255 128 C01 G Cutoff RF 0 255 128 C02 B Cutoff 0 255 129 Table 6 Service Adj C00 C0F C03 Brightness FIXED 31 C04 G Drive RF 0 127 65 C05 B Drive RF 0 127 66 C06 G CutOff Video FIXED 127 C07 B CutOff Video FIXED 127 C08 G Drive Video FIXED 127 C09 B...

Page 13: ... 7 S0B Caption Digital Filter SW FIXED 1 S0C Caption Scroll FIXED 1 S0D RGB MTX RF Video FIXED 6 S0E RGB MTX Component FIXED 5 S0F BBE ON OFF FIXED 1 S10 BBE Low Level FIXED 4 S11 BBE High Level FIXED 6 S12 Surround Effect FIXED 3 Service Adjustment Adj Range Default Level X00 Clip Level FIXED 8 X01 Correct Gain X02 Limit Level FIXED 24 X03 Core Level FIXED 41 X04 C Delay RF FIXED 2 X05 C Delay Vi...

Page 14: ... Set Drive Data DAC C04 G_Drive RF to 64 DAC C05 B_Drive RF to 64 Procedure 1 Use 100 1 probe for measurements 2 Apply a Black White Pattern See Figure 56 3 Connect Scope to TPLR1 and adjust Sub Bright B00 data until voltage measured is 190V 2V See Figure 57 4 Connect Scope to TPLG1 and adjust R CutOff C00 data until voltage measured is 190V 2V See Figure 57 5 Connect Scope to TPLB1 and adjust B C...

Page 15: ...ve too much blue or green 6 Use a test signal from a VCR or laser disk that has a pre recorded close up of a signal that has good flesh tones 7 The signal on the VCR or laser disk should look normal Color Check Using a clean RF or video signal set the color level so that it does not saturate or appear harsh Make sure that color is not set so that it appears dull and washed out Look for natural col...

Page 16: ... frequency and record the reading Note Pin 34 measurement must have at least four digits of resolution following the decimal point Example 000 0000 3 Place the PTV into Service Mode for making electronic adjustment select the Clock Adjustment DAC S9 and change value to 128 4 Calculate and set S9 based on the following formula Note Pin 34 measurement will not change regardless of the value stored i...

Page 17: ... 50 PT 51G36E EC A Board Schematic Left Portion ...

Page 18: ... 51 PT 51G36E EC A Board Schematic Waveforms WAVEFORMS IC451 Pin 2 67 2Vp p 1 V OUT A Board Q501 COLLECTOR 188Vp p 1 H DRIVE A Board ...

Page 19: ... 52 PT 51G36E EC P Board Schematic Left Portion ...

Page 20: ...IC833 1 2 3 7 85 0 00 4 89 P Board Voltage Measurements IC Transistors Q801 0 00 16 10 4 87 S D G IC802 1 2 3 141 20 10 38 0 00 IC832 1 2 3 11 47 0 00 8 86 Q802 0 71 0 10 0 00 IC801 1 2 3 4 5 6 7 8 9 1 56 0 36 0 17 0 10 0 00 5 16 16 18 0 00 5 96 ...

Page 21: ... 54 PT 51G36E EC X Board Schematic Left Portion ...

Page 22: ... 15 3 92 4 94 2 32 2 55 0 00 IC101 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 4 14 0 00 3 37 3 36 3 36 0 00 8 56 0 00 5 16 0 00 7 55 4 54 2 51 2 49 2 56 8 71 4 93 4 79 4 71 2 07 2 31 1 15 7 28 0 64 5 06 2 00 4 31 3 11 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 3 90 4 15 0 00 0 00 4 60 0 97 1 91 4 33 8 70 3 10 5 92 7 24 5 64 4...

Page 23: ... 58 PT 51G36E EC K G R Board Schematics Layouts K Board Schematic K Board Layout G Board Schematic G Board Layout R Board R Board Layout ...

Page 24: ...surements Q960 9 54 71 30 8 97 B C E Q959 131 40 71 30 132 10 Q961 139 90 132 00 140 50 Q3391 3 21 11 48 2 98 Q3341 2 98 11 99 2 39 Q3342 2 32 0 00 2 92 B C E Q397 8 13 1 46 8 39 Q393 11 98 167 10 0 00 Q394 168 30 216 80 167 90 Q395 166 90 1 09 167 80 Q396 167 80 8 66 167 80 ...

Page 25: ...E Q376 175 90 8 64 175 70 Q373 11 98 175 10 11 46 Q374 176 30 216 60 176 00 Q956 9 94 73 20 9 37 Q955 131 80 73 30 132 30 B C E Q941 0 98 9 38 0 39 Q937 6 84 0 00 7 46 Q938 140 00 132 30 140 50 Q935 7 43 19 01 6 84 Q934 7 43 0 00 8 08 Q936 8 07 19 02 7 49 B C E Q377 8 11 1 54 8 34 IC3371 1 2 3 19 01 0 00 11 99 ...

Page 26: ...11 98 173 20 11 45 Q354 174 50 217 20 174 10 Q3351 3 16 11 46 2 94 Q350 0 00 215 30 0 00 Q351 0 61 0 00 0 00 Q931 139 90 132 00 140 50 B C E Q932 0 97 9 08 0 37 Q957 131 40 71 70 132 10 Q958 9 65 71 70 9 08 Q356 174 10 8 50 174 00 Q355 173 20 0 74 174 00 LR Board Voltage Measurements ...

Page 27: ...35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 3 23 3 23 0 00 0 00 0 00 0 62 0 14 3 23 3 23 0 00 2 32 1 45 2 84 1 29 0 99 0 00 0 98 3 23 0 99 3 23 1 03 0 00 1 00 0 00 0 98 0 00 Y Board Voltage Measurements IC Transistors Q4315 3 93 4 79 3 24 B C E Q1802 3 39 2 84 4 06 Q1801 0 00 4 08 0 00 Q1803 3 34 2 78 3 94 Q1805 1 10 0 00 1 82 B C E Q1804 1 16 0 00 1 88 Q4310 2 44 4 78 1 79 Q4313 0 63 0 ...

Reviews: