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Panasonic

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

Service Manual

Color Television

(NA8ML)

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.”

CT-32SX31E

BP371

CT-32SX31UE

BP371

CT-32SX31CE

BP371

CT-36SX31E

BP372

CT-36SX31UE

BP372

CT-36SX31CE

BP372

ORDER NO. MTNC010524C1

B5

Chassis

Models

This Service manual is issued as a service guide for the models of the NA8ML family listed above. Included in this
manual are a set of schematic, block diagrams, functional descriptions, alignment procedures, disassembly
procedures and a complete parts list.

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Содержание CT-32SX31CE

Страница 1: ... 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 CT 32SX31E BP371 CT 32SX31UE BP371 CT 32SX31CE BP371 CT 36SX31E BP372 CT 36SX...

Страница 2: ...etic shield limits the X ray radiation around the bell of the picture tube in addition to the restricting magnetic effects When using a picture tube test jig for service ensure that the jig is capable of handling 40kV without causing X ray radiation Before returning a serviced receiver to the owner the service technician must thoroughly test the unit to ensure that is completely safe to operate Do...

Страница 3: ...K014ZZ 15 DAF Adjustment 15 Serviceman Mode Electronic Controls 17 Exiting the Serviceman Mode 17 Entering Serviceman Mode Back Open Method 23 Instructional Flow Chart for Serviceman Mode 24 Service Adjustments Electronic Controls 27 Sub Contrast Adjustment 27 Sub Brightness B02 27 Tint Color Adjustment 27 PIP Sub Contrast Adjustment P03 28 Color Temperature Adjustment 28 Complete Adjustment 28 Ho...

Страница 4: ...ing pads with tweezers or with a miniature alligator clip and apply heat to the pad area with a 30 watt iron until solder flows Do not apply heat for more than 3 seconds How to Replace Flat IC Required Tools 1 Remove the solder from all of the pins of a Flat IC by using a de solder braid 2 Put the iron wire under the pins of the Flat IC and pull it in the direction indicated while heating the pins...

Страница 5: ...oltage protection circuit is not adjustable However if components indicated by the symbol on the schematic in either the horizontal sweep system or the over voltage protection circuit itself are changed the operation of the circuit should be checked using the following procedure Equipment needed to check the disabled circuit 1 DC Ammeter 2 High Voltage Meter 0 50kV electrostatic 3 Variac or Isolat...

Страница 6: ...peakers 2 A V in rear front 3 2 1 S VHS Input rear front 1 1 Component Input Y Pb Pr 1 Audio Out FAO F VAO V F V EPJ HPJ MISC HPJ Dimensions mm WxDxH in 667 3x810x568 26 52x32 4x22 72 747x936x610 5 29 88x37 44x24 42 Weight kg lbs 74 8 164 56 98 5 216 7 Power source V Hz 120 60 Anode voltage 31 0kV 1 0kV Video input jack 1Vp p 75Ω phono jack Audio input jack 500mV RMS 47kΩ A Board TNP2AH026 AB NIL ...

Страница 7: ...annels Press to highlight desired features when menus are displayed Also use to select Cable Converter box channels after programming Remote Control Infra red codes the TV AUX CABLE switch must be set in CABLE position Action Button Press to display Main Menu and access On Screen feature and Adjustment Menus TV Video Button Press to select TV or Video Input Figure 3 Location of Controls Receiver 2...

Страница 8: ...TION Button Press to display Main Menu and access or exit On Screen features and Adjustment Menus REW PLAY FF TV VCR STOP PAUSE REC VCR CHANNEL Component function buttons EUR511500 MULTI Button Programmable button that can operate up to seven 7 functions at once TV VIDEO Button Press to select TV or Video input CH channel Buttons Press to select channels Use with volume buttons to navigate in menu...

Страница 9: ...ack To reinsert back the cables remember the original position of cables F1 red cable goes to A on the CRT socket and F2 white cable goes to B on the CRT socket Figure 5 F1 F2 cables release To release screen GND cables from L Board L11 L12 connectors insert a wire in both sides of connector and pull upwards the cable then remove the wire See Fig 6 Figure 6 L Board Screen GND cables release Speake...

Страница 10: ...To remove and remount the dag ground braid a Unhook the coil spring from the bottom corners of the CRT ears b Release the braid loop from the upper corners of the CRT ears 7 Mount the dag ground braid on the replacement CRT Position the degaussing coil with new ties Dress coil as was on the original CRT 8 Replace the components on CRT neck and reinstall into cabinet Verify that all ground wires an...

Страница 11: ... 11 Back Cover Removal Figure 8 Back Cover Removal 4 screws at top edge 1 screw at lower 1 screw left corner 1 screw by antenna jacks 1 screw 1 screw 1 screw 1 screw at lower right corner ...

Страница 12: ...he lead of the DVM Adjust Picture Menu for normalized video adjustments High Voltage Check 1 Select an active TV channel and confirm that horizontal is in sync 2 Adjust Brightness and Picture using Picture Icon menu so video just disappears 3 Confirm B 140 0V is within limit 4 Using a high voltage meter confirm that the High Voltage is 31 0kV 1 0kV T U N E R TP 1 8 A V REAR INPUTS IC101 D BOARD A ...

Страница 13: ...ty Convergence Assembly with 4 Pairs of Rings Apply a green pattern with a horizontal line adjust the Deflection Yoke so that has no tilt then secure it Adjust center line of the pattern with the mechanical center of the CRT this center is determined by two marks at the side edges of the screen To adjust the line once the vertical raster shift tabs are place at 3 o clock to reduce its magnetic fie...

Страница 14: ...rtical size and focus adjustments must be completed prior to performing the convergence adjustment Connect a dot pattern generator to the Receiver The Brightness level should not be higher than necessary to obtain a clear pattern Converge the red and the blue dots at the center of the screen by rotating the R B pole Static Convergence Magnets Align The converged red blue dots with the green dots a...

Страница 15: ...oke and CRT for optimum convergence If the yoke or CRT is replaced the strip may not be required First converge the set without the strip and observe the corners If correction is needed 1 Place strip between CRT and yoke in quadrant needing correction Slowly move it around for desired results 2 Press adhesive tightly to the CRT and secure with tape DAF Adjustment Preparation 1 Apply a crosshatch p...

Страница 16: ...e other side electron beam Static convergence magnets are set for center convergence As the yoke is tilted horizontally one raster gets larger while the other gets smaller Figure 18 Horizontal Yoke Movement 6 Poles 4 Poles 2 Poles Purity 2 Poles VRS Adj For Adjustment of DY YHC YV XV Dynamic Convergence Figure 19 Convergence Magnets and Wedges Location IMPORTANT NOTE Always Exit the Serviceman Mod...

Страница 17: ...in upper corner 7 Press the Power Button on the Remote Control to select one of the Serviceman Adjustment Modes 1 B Serviceman VCJ SUB DATA ADJUSTEMENT 2 C Serviceman VCJ CUT OFF ADJUSTMENT 3 D Serviceman GEOMETRY ADJUSTMENT 4 M Serviceman MTS ADJUSTMENTS 5 P Serviceman PIP ADJUSTMENT 6 S Serviceman S OPTION ADJUSTMENTS 7 X Serviceman X OPTION ADJUSTMENT 8 E Serviceman E OPTION ADJUSTMENTS 9 CHK N...

Страница 18: ... G 128 C02 CUT OFF B 128 C03 BRIGHTNESS 31 C04 G DRIVE 64 C05 B DRIVE 64 C06 DRIVE C TEMP 8 C07 CONT C TEMP 5 C08 CUTOFF R COMP 112 C09 CUTOFF G COMP 114 C0A CUTOFF B COMP 103 1 Press Channel Up Down on the Remote Control to select one of the available Service Adjustments a in Fig 20 Note Write Down the original value set b in Fig 20 for each address before modifying anything It is easy to erroneo...

Страница 19: ...ustment Default Level M00 INPUT LEVEL 33 M01 LOW LEVEL SEPARATION 6 M02 HIGH LEVEL SEPARATION 25 1 Press Channel Up Down on the Remote Control to select one of the available Service Adjustments a in Fig 20 Note Write Down the original value set b in Fig 20 for each address before modifying anything It is easy to erroneously adjust the wrong item 2 Press Volume Up Down on the Remote Control to adju...

Страница 20: ...P POS 160 P0A PIP POS 10 P0B PIP POS 116 P0C N A N A P0D PIP YDELAY 4 1 Press Channel Up Down on the Remote Control to select one of the available Service Adjustments a in Fig 20 Note Write Down the original value set b in Fig 20 for each address before modifying anything It is easy to erroneously adjust the wrong item 2 Press Volume Up Down on the Remote Control to adjust the level of the selecte...

Страница 21: ...nything It is easy to erroneously adjust the wrong item 2 Press Volume Up Down on the Remote Control to adjust the level of the selected Service Adjustment b in Fig 20 OPTIONS Adjustment Default Level S00 ABL GAIN 3 S01 ABL POINT 3 S02 RGB BRIGHTNESS 3 S03 RGB GAMMA 1 S04 GAMMA 1 S05 VSM G 0 S06 BS POINT 3 S07 CLOCK ADJUST 128 S08 CAP DIGITAL FIL 0 S09 CAP SCROLL 1 S0A RGB MATRIX 6 S0B RGB MATRIX ...

Страница 22: ...K W 0 X0C H LOCK L 70 X0D H SEPA 1WL 313 X0E H SEPA 2WL 266 E Option Adjustment Default Level E00 SURROUND EFFECT 3 E01 BBE LOW 4 E02 BBE HIGH 6 1 Press Channel Up Down on the Remote Control to select one of the available Service Adjustments a in Fig 20 Note Write Down the original value set b in Fig 20 for each address before modifying anything It is easy to erroneously adjust the wrong item 2 Pr...

Страница 23: ...r is ON or Puggled and operating in Normal Mode momentarily short test point FA1 TP8 to Cold Ground FA2 TP3 A Board The Receiver enters the Aging Mode Yellow letters CHK appear in the upper left corner of the CRT The Volume Up Down will adjust rapidly 2 Simultaneously press the Action and the Volume Up buttons on the Receiver Control Panel The Receiver enters the Serviceman Mode The letter in CHK ...

Страница 24: ...ICEMAN MODE CHK turns red Volume Up Down operate normally Customer Controls are set to nominal level SUB DATA ADJUSTMENTS B ITEMS QUICK ENTRY TO SERVICEMAN MODE Select CABLE Mode Set SLEEP time for 30 Min Tune to Channel 124 Adjust Volume to minimum Press VOL DOWN On Receiver EXIT EXIT Figure 22 Flow Chart for Serviceman Mode N Y N Y C ON REMOTE RECALL Press Action and Power on the Receiver simult...

Страница 25: ...N REMOTE POWER ON REMOTE POWER ON REMOTE ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST THE LEVEL CH VOL VOL ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST THE LEVEL CH VOL VOL ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST THE LEVEL CH VOL VOL B IMPORTANT NOTE Always Exit the Serviceman Mode Following Adjustments Figure 23 Flow Chart for Serviceman Mode cont ...

Страница 26: ...USTMENTS P ITEMS Adj needed Y N POWER ON REMOTE Note Some adjustments modes may not be available in some models depending on available options ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST THE LEVEL CH VOL VOL ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST THE LEVEL CH VOL VOL OPTIONS ADJUSTMENTS S ITEMS Adj needed Y N POWER ON REMOTE ON REMOTE CONTROL TO SELECT ADJUSTMENT...

Страница 27: ...ATURE to NORMAL Procedure 1 Apply a black white cross pattern 2 In the Serviceman Mode for making electronic adjustments select the DAC adjustment B02 and adjust data so that 7 5IRE part is the same light output as the 3IRE part See Fig 26 Tint Color Adjustment Serviceman DAC Adjustment B01 B00 Preparation 1 Apply a rainbow color bar signal 2 Preset the following controls Brightness Min Color Cent...

Страница 28: ...for making electronic adjustment select the Sub Bright DAC B02 3 Press the R Tune key on the remote 4 Observe the oscilloscope waveform at Horizontal rate and adjust the Serviceman Mode Sub Bright DAC B02 level until a scanning period of 2 3 0 05V above DC ground is measured as indicated in Fig 30 5 Press the R Tune key on the remote 6 Connect the scope to RED Cathode KR on the CRT Board 7 In the ...

Страница 29: ...pper and lower linearity 2 Adjust D0B to straighten upper and lower lines See Fig 33 H Size Adjustment D0D Preparation 1 Apply a Monoscope pattern Procedure 1 Adjust D0D DATA so that width A and B becomes 5 00 0 40 when using factory pattern See Fig 34 Note When using a different pattern correlate with factory pattern V Size and V Position Adjustment D01 D06 Preparation 1 Apply a Crosshatch patter...

Страница 30: ... 70 5dB 75Ω OPEN P S 10dB 2 Adjust the MTS Input Level Adjustment M0 until the voltage measured is 106 6 0mV rms Stereo Separation Adjustment M01 M02 Preparation 1 Connect an RF signal generator to the RF antenna input 2 Connect oscilloscope to TPE10 Procedure 1 Select Stereo Mode in Audio menu 2 Apply the following signal from the RF signal generator Video 100 IRE flat field 30 modulation Audio 3...

Страница 31: ...electronic adjustment select the Clock Adjustment DAC S07 3 Calculate and set S07 based on the following formula Note Pin 13 measurement will not change regardless of the value stored in S07 Service Adjustments Mechanical Controls Focus part of T551 This adjustment is to make the picture clear Preparation Connect a Signal generator and select a dot pattern Procedure Adjust the FOCUS controls to ob...

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