Table of Contents
Service Manual
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.
"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.
Models
CT-32SX31E
CT-32SX31UE
CT-32SX31CE
CT-36SX31E
CT-36SX31UE
CT-36SX31CE
Copyright 2001 by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
and distribution is a violation of law.
®
ORDER NO. MTNC010524C1
B5
Color Television
Main Manual
(NA8ML)
Panasonic
Chassis
BP371
BP371
BP371
BP372
BP372
BP372
Table of Contents
Related Manuals for Panasonic CT-32SX31CE
Summary of Contents for Panasonic CT-32SX31CE
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Page 1: Service Manual
The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this Main Manual. Color Television Main Manual (NA8ML) Panasonic Models CT-32SX31E CT-32SX31UE CT-32SX31CE CT-36SX31E CT-36SX31UE CT-36SX31CE Copyright 2001 by Matsushita Electric Corporation of America. All rights reserved. Unauthorized copying and distribution is a violation of law. ®... -
Page 2: Important Safety Notice
Important Safety Notice Special components are used in this television set which are important for safety. These parts are identified on the schematic diagram by the symbol these critical parts are replaced with the manufacturer’s specified replacement part to prevent X-ray radiation, shock, fire or other hazards. -
Page 3: Table Of Contents
Important Safety Notice ....2 Safety Precautions ....2 General Guidelines . -
Page 4: Service Notes
Note: These components are affixed with glue. Be careful not to break or damage any foil under the component or at the pins of the ICs when removing. Usually applying heat to the component for a short time while twisting with tweezers will break the component loose. Leadless Chip Component (surface mount) Chip components must be replaced with identical chips... -
Page 5: Horizontal Oscillator Disable Circuit
Service Notes (Continued) IMPORTANT: To protect against possible damage to the solid state devices due to arcing or static discharge, make certain that all ground wires and CTR DAG wire are securely connected. CAUTION: The power supply circuit is above earth ground and the chassis cannot be polarized. -
Page 6: Receiver Feature Table
Receiver Feature Table FEATURE\MODEL CT-32SX31E/UE/CE Chassis Tunning system # of channels Menu language Closed Caption V-Chip (USA/CANADA) Remote Model # Picture tube Comb Filter V/A norm Color Temp MTS/SAP/DBX BASS/BL/TRE Control AI Sound Surround SPATIALIZER/BBE Built-in audio power # of speakers A/V in (rear/front) S-VHS Input (rear/front) Component Input... -
Page 7: Location Of Controls (Receiver)
Location of Controls (Receiver) VOLUME POWER Remote Control Sensor Figure 3. Location of Controls (Receiver). Quick Reference Control Operation Power Button - Press to turn ON or OFF. Volume Buttons - Press to adjust Sound Level, or to adjust Audio Menus, Video Menus, and select operating features when menus are displayed Channel Buttons - Press to select programmed channels. -
Page 8: Location Of Controls (Remote)
Location of Controls (Remote) POWER Button Press to turn ON and OFF. MUTE Button Press to mute sound. A second press resumes sound. Press also to access and delete Closed Caption display. VCR, DVD, LD/CD, AUX, TV, CBL, DBS, RCVR Component function buttons VOL (volume) Buttons Press to adjust TV sound level. -
Page 9: Disassembly For Service
Disassembly for Service Back Cover Remove all the screws marked with an arrow( from the back of the Receiver. Note: Screw configuration, type, and number of screws vary depending on the model of the Receiver serviced and the application; various models are covered in this Manual. - Page 10 Disassembly for Service (Continued) Note: To remove the four brackets holding the degauss coil from the corners of the CRT, first remove the CRT from the cabinet, then remove the Brackets by pressing the tab on the bracket and pull upwards. These Brackets are included in the Degauss Coil Kit, for part number, please see parts list section (See Fig.
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Page 11: Back Cover Removal
Back Cover Removal 4 screws at top edge 1 screw by antenna jacks 1 screw 1 screw 1 screw at lower 1 screw 1 screw at lower right corner left corner 1 screw Figure 8. Back Cover Removal - 11 -... -
Page 12: Chassis Service Adjustment Procedures
Chassis Service Adjustment Procedures All service adjustments are factory preset and should not require adjustment unless controls and/or associated components are replaced. Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use heat sink when the HOT ground symbol ( ) is used. -
Page 13: Purity And Convergence Procedure
Purity and Convergence Procedure Adjustment is necessary only if the CRT or the deflection yoke is replaced or if the setting was disturbed. The complete procedure consists of: 1. Vertical Raster Shift Adjustment. (Only for Models with Purity/Convergence Assembly with 4 Pairs of Rings). -
Page 14: Initial Center Static Convergence
Initial Center Static Convergence Connect a dot/cross hatch generator to the Receiver and tune in a signal. Observe misconvergence at center of the screen only. Adjust the R&B pole magnets; by separating tabs and rotating to converge blue with red. Adjust the R&B and R&B&G pole magnets: by separating tabs and rotating to converge blue and red (magenta) with green. -
Page 15: Permalloy Convergence Corrector Strip (Part No. 0Fmk014Zz)
Adjustment (VR2 for Vertical dynamic convergence) 1. Apply a crosshatch pattern. 2. Adjust contrast and brightness customer controls to obtain a correct picture. 3. With a driver Adjust VR2 (located in deflection yoke board Fig. 19) to obtain a proper corvergence at left and right side of the screen. - Page 16 As the yoke is tilted vertically, the rasters produced outside guns rotate in opposite directions. Figure 17. Vertical Yoke Movement R G B As the yoke is tilted horizontally, one raster gets larger while the other gets smaller Figure 18. Horizontal Yoke Movement 2 Poles(Purity) 2 Poles(VRS Adj) 4 Poles...
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Page 17: Serviceman Mode (Electronic Controls)
Serviceman Mode (Electronic Controls) This Receiver has electronic technology using the I²C Bus Concept. It performs as a control function and it replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the control functions are now performed by using “On Screen Display Menu”. (The Serviceman Adjustment Mode.) Note: It is suggested that the technician reads all the way through and understand the following procedure for Entering/Exiting the Serviceman Adjustment Mode;... - Page 18 Press the Power Button on the Remote Control to select the Serviceman Adjustment . For Adjustments: 1.Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments (a in Fig. 20). IMPORTANT NOTE: Always Exit the Serviceman Mode Following Adjustments.
- Page 19 Press the Power Button on the Remote Control to select the Serviceman Adjustment For Adjustments: 1.Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments (a in Fig. 20). Note: Some adjustment modes may not be available in some formats.
- Page 20 Press the Power Button on the Remote Control to select the Serviceman Adjustment For Adjustments: 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...
- Page 21 Press the Power Button on the Remote Control to select the Serviceman Adjustment Adjustments: 1.Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments (a in Fig. 20). IMPORTANT NOTE: Always Exit the Serviceman Mode Following Adjustments. Note: Write Down the original value set (b in Fig.
- Page 22 Press the Power Button on the Remote Control to select the Serviceman Adjustment For Adjustments: 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...
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Page 23: Entering Serviceman Mode (Back-Open Method)
To Check Purity: Press the Recall Button on the Remote Control when in Serviceman Mode (red “CHK” is displayed) to enter the Purity Field Check Mode. BLUE SCREEN Entering Serviceman Mode (Back-Open Method) 1. While the Receiver is ON or Puggled and operating in Normal Mode, momentarily short test point FA1 (TP8) to Cold Ground ( (TP3) A-Board. -
Page 24: Instructional Flow Chart For Serviceman Mode
Instructional Flow Chart for Serviceman Mode IMPORTANT NOTE: Always Exit the Serviceman Mode Following Adjustments. • WHITE • SCREEN • RECALL (ON REMOTE) Press Action + Volume Up Simultaneously (ON Receiver) GREEN BLUE SCREEN SCREEN WHITE SCREEN SCREEN (ON REMOTE) ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST... - Page 25 Instructional Flow Chart for Serviceman Mode - Continued ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST VOL VOL THE LEVEL ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST VOL VOL THE LEVEL ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST VOL VOL...
- Page 26 Instructional Flow Chart for Serviceman Mode - Continued ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST VOL VOL THE LEVEL ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST VOL VOL THE LEVEL ON REMOTE CONTROL TO SELECT ADJUSTMENT ON REMOTE TO ADJUST VOL VOL...
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Page 27: Service Adjustments (Electronic Controls)
Service Adjustments (Electronic Controls) Sub-Contrast Adjustment Serviceman DAC Adjustment (B02, B03) This adjustment is factory set. Do not adjust unless repairs are made to associated circuit, the CRT Board or when the CRT is replaced. Preparation: 1. Apply a Black-White pattern. 2. -
Page 28: Pip Sub-Contrast Adjustment (P03)
Procedure: 1. Connect the oscilloscope to TPY1. 2. Apply a color bar signal in main and PIP (PIP on). 3. In the Serviceman Mode for making electronic adjustments, select the DAC adjustment (P03) for PIP Sub-Subcontrast so that child (PIP) level is 90% of parent (MAIN) signal (See Fig. -
Page 29: Horizontal Centering (D00)
Service Adjustments (Electronic Controls, cont.) Horizontal Centering (D00) This Adjustment helps to center the picture horizontally Preparation: Connect a monoscope pattern signal. Procedure: 1. In the Serviceman Mode for making electronic adjustments. Select the Horizontal Centering Adjustment DAC (D00) and adjust until the center of the monoscope pattern is centered on CRT. -
Page 30: V-Correction Adjustment (D02)
V-Correction Adjustment (D02) Preparation: 1. Apply a Crosshatch pattern. 2. Adjust (D01) so that V-Size is regular size. 3. If b-a<-1.5mm (in top and bottom), increase (D02) by one step and adjust (D01) so that V-Size is regular; repeat steps until b-a 1.5mm 4. -
Page 31: Clock Adjustment (S07)
Service Adjustments (Electronic Controls, cont.) Clock Adjustment (S07) Preparation: Connect the frequency counter to TPS1 (IC001 pin-13) and cold ground ( Note: Frequency Counter probe capacitance should be 8pF or less. Procedure: 1. Measure TPS1 (IC001 pin 13) for the frequency of the waveform and record the reading.