Table of Contents
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This Service manual is issued as a service guide for the models of the NA8 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.
Color Television
Models
CT-27D10B
CT-27D10UB
CT-27D10DB
Copyright 2000 by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
and distribution is a violation of law.
®
ORDER NO. MTNC000417C1
B5
Main Manual
(NA8)
Panasonic
Chassis
AP338
AP338
AP338
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Table of Contents
Related Manuals for Panasonic CT-27D10B
Summary of Contents for Panasonic CT-27D10B
- Page 1 ORDER NO. MTNC000417C1 Color Television Main Manual (NA8) Panasonic Models Chassis CT-27D10B AP338 CT-27D10UB AP338 CT-27D10DB AP338 This Service manual is issued as a service guide for the models of the NA8 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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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 and printed in BOLD TYPE on the replacement part list. It is essential that 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 Service Adjustments (Electronic Control)....24 Safety Precautions . -
Page 4: Service Notes
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 How to Replace Flat-IC (surface mount) -
Page 5: Horizontal Oscillator Disable Circuit
Service Notes (Continued) IMPORTANT: To protect against possible damage to Procedure: the solid state devices due to arcing or static discharge, 1. Tune in a station to verify that the horizontal is make certain that all ground wires and CTR DAG wire in sync. -
Page 6: Receiver Feature Table
Receiver Feature Table FEATURE\MODEL CT-27D10B/UB CT-27D10DB Chassis Tunning system # of channels Menu language Eng/Span/Fr Eng/Span/Fr Closed Caption V-Chip 75 Ω input Remote Model # EUR511502 EUR511502 Picture tube M68LGL061X M68LGL061X Black Face Regular Tube Comb Filter 3 Line Digital 3 Line Digital H. -
Page 7: Location Of Controls (Receiver)
Location of Controls (Receiver) Remote Control Front A/V Input Sensor Figure 2. Location of Controls (Receiver). Quick Reference Control Operation 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) EMOTE ONTROL LIGHT POWER Press to light remote control buttons. Press to turn ON and OFF. Presione para iluminar los botones del Presione para ENCENDER y APAGAR. control remoto. Appuyer pour établir ou couper le contact. Appuyer pour éclairer les touches de la télécommande. -
Page 9: Disassembly For Service
Disassembly for Service Back Cover Disassembly for CRT Replacement 1. Discharge the CRT as instructed in the Safety Remove all the screws marked with an arrow( Precautions (see page 2). from the back of the Receiver. 2. Disconnect the yoke (DY) plug, degaussing coil Note: Screw configuration, type, and number of (DEG) plug and the CRT 2nd anode button from... -
Page 10: 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 IC803’s heat sink when the HOT ground symbol ( ) is used. -
Page 11: Purity And Convergence Procedure
Purity and Convergence Procedure Adjustment is necessary only if the CRT or the For a 1-piece assembly (see Fig. 8): deflection yoke is replaced or if the setting was Position like tabs of purity devices together at 12 disturbed. The complete procedure consists of: o’clock to reduce any magnetic field effect. -
Page 12: Initial Center Static Convergence
Initial Center Static Convergence Final Convergence Procedure (see Fig. 11 Connect a dot/cross hatch generator to the Receiver through Fig. 13): and tune in a signal. Observe misconvergence at Note: Vertical size and focus adjustments must be center of the screen only. completed prior to performing the convergence Adjust the R&B pole magnets;... - Page 13 As the yoke is tilted vertically, the rasters produced outside guns rotate in opposite directions. Figure 11. Vertical Yoke Movement Raster produced from one of the outside electron beams Raster from the other side electron beam R G B Static convergence magnets are set for center convergence As the yoke is tilted horizontally, one raster gets larger while the other gets...
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Page 14: 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 15: Sub-Data Adjustment (B)
Press the Power Button on the Remote Control to select the Serviceman Adjustment . For Adjustments: 1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the Remote Control to select one of value set (b in Fig. 14) for Remote Control to adjust the the available Service Adjustments each... -
Page 16: Pin Cushion Adjustment (D)
Press the Power Button on the Remote Control to select the Serviceman Adjustment For Adjustments: 1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the Remote Control to select one of value set (b in Fig. 14) for Remote Control to adjust the the available Service Adjustments each... -
Page 17: Pip Adjustment (P)
Press the Power Button on the Remote Control to select the Serviceman Adjustment For Adjustments: 1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the Remote Control to select one of value set (b in Fig. 14) for Remote Control to adjust the the available Service Adjustments each... -
Page 18: Options Adjustment (S)
Press the Power Button on the Remote Control to select the Serviceman Adjustment Adjustments: 1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the Remote Control to select one of value set (b in Fig. 14) for Remote Control to adjust the the available Service Adjustments each... -
Page 19: Comb Filter Adjustment (X)
Press the Power Button on the Remote Control to select the Serviceman Adjustment For Adjustments: 1.Press Channel Up/Down on the Note: Write Down the original 2.Press Volume Up/Down on the Remote Control to select one of value set (b in Fig. 14) for Remote Control to adjust the the available Service Adjustments each... -
Page 20: To Check Purity
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. NORMAL SCREEN Press Recall again to select desired field. BLUE GRN. WHITE SCREEN SCREEN SCREEN SCREEN Figure 15. -
Page 21: Instructional Flow Chart
Instructional Flow Chart for Serviceman Mode IMPORTANT NOTE: Always Exit the Serviceman Mode Following Adjustments. NORMAL MODE Momentarily short FA1 to FA2 ( AGING MODE • Yellow “CHK” appears in upper left corner of screen. WHITE • Volume Up/Down operate rapidly. SCREEN •... - Page 22 Instructional Flow Chart for Serviceman Mode - Continued CUT-OFF ADJUSTMENTS. C ITEMS. ON REMOTE CONTROL TO Adj. SELECT ADJUSTMENT needed? ON REMOTE TO ADJUST VOL VOL THE LEVEL POWER (ON REMOTE) PINCUSHION ADJUSTMENTS. D ITEMS. ON REMOTE CONTROL TO Adj. SELECT ADJUSTMENT needed? IMPORTANT NOTE:...
- Page 23 Instructional Flow Chart for Serviceman Mode - Continued PIP ADJUSTMENTS. P ITEMS. ON REMOTE CONTROL TO Adj. SELECT ADJUSTMENT needed? ON REMOTE TO ADJUST VOL VOL THE LEVEL POWER (ON REMOTE) OPTIONS ADJUSTMENTS. S ITEMS. ON REMOTE CONTROL TO Adj. SELECT ADJUSTMENT needed? ON REMOTE TO ADJUST...
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Page 24: Service Adjustments
Service Adjustments (Electronic Controls) Sub-Brightness Procedure: 1. In the Serviceman Mode, select DAC Sub- Serviceman DAC Adjustment (B2) Brightness Adjustment (B2) and adjust for 1.5- Adjustment of this control is important for setting proper 1.9Vp-p between blanking and 7.5 IRE level. (See operation of customer brightness and picture controls. -
Page 25: Color Temperature Adjustment
Service Adjustments (Electronic Controls, cont.) Color Temperature Adjustment 8. View scope trace at Horizontal rate and adjust the Serviceman Mode DAC (C0) level until a scanning (B/W Tracking) period of 195V above DC ground is measured, as indicated in Fig. 23. Serviceman DAC Adjust. -
Page 26: Horizontal Centering
Service Adjustments (Electronic Controls, cont.) Horizontal Centering Stereo Separation Adjustment (M1 & M2) Preparation: Serviceman DAC Adjustment (D0) 1. Connect an RF signal generator to the RF antenna Preparation: input. Connect a monoscope pattern generator. Procedure: 2. Connect a scope to TPE10. 1. -
Page 27: Clock Adjustment
Service Adjustments (Electronic Controls, cont.) Clock Adjustment (S7) 5. Calculate based following formula: Preparation: Connect the frequency counter from TPS1 (IC001 244.1406 pin13 Hz – ×10 0.901 ----------------------------------------------------------------- - Pin 13) to cold ground ( 244.1406 Note: Frequency Counter probe capacitance should be 8pF or less. -
Page 28: Audio Signal Path Block Diagram
Audio Signal Path Block Diagram Figure 25. Audio Signal Path Block Diagram. - 28 -... -
Page 29: Video Signal Path Block Diagram
Video Signal Path Block Diagram Figure 26. Video Signal Path Block Diagram. - 29 -... -
Page 30: Video-Chroma Signal Path Block Diagram
Video-Chroma Signal Path Block Diagram Figure 27. Video-Chroma Path Block Diagram.. - 30 -... -
Page 31: Ic101 Vcj In/Out Pins And Functions
IC101 IN/OUT Pins and Functions (VCJ) IC101 TA1310BN Verocity Scanning DC RC 56 DC Restoration Correction VSM Out Modulation Ground BP DET 55 Black Peak Detection Red Input Y In 54 Luminance Signal Input R In Green Input R-Y Input G In B-Y In Blue Input... -
Page 32: Ic001 Mpu In/Out Pins And Functions
IC001 IN/OUT Pins and Functions (MPU) IC001 MN101C46FTA3 VSS 42 Remote signal in RMIN OSC1 41 SDA1 14.32MHz X-tal OSC2 40 SCL1 14.32MHz X-tal VDD (VPP) 39 AFC1 ADIN0 +3.3V P42 38 AFC2 ADIN1 SCL0 SDA0 Key Scan 1 ADIN2 Not used/open Action ADIN3... -
Page 33: Component Identification
Component Identification 1 Screw 1 Screw 1 Screw 1 Screw 1 Screw 1 Screw 1 Screw 1 Screw Figure 30. Cabinet Back - 33 -... - Page 34 Component Identification Anode (High Voltage) CRT (Secured by 4 screws) Deflection yoke Degaussing Coil Yoke wedge Speaker Speaker VAO out Tuner T551 Flyback A/V Jacks S-VHS Input Figure 31. Rear View Note: After servicing the receiver, remember to dress the cables, as shown above. - 34 -...
- Page 35 Component Identification A/V front inputs Front keypad IC001 MPU IC2302 IC 451 RL801 IC002 Q501 H-Drive IC6501 IC803 Tuner Q551 Fuse IC101 VCJ IC3001 IC2351 T551 Flyback A/V Jacks S-VHS Input Audio out Figure 32. A-Board CRT Socket Figure 33. C-Board - 35 -...
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Page 36: Parts List
REPLACEMENT PARTS LIST Models: CT-27D10B, CT-27D10UB & CT-27D10DB Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO. -
Page 37: Replacement Parts List
REPLACEMENT PARTS LIST Models: CT-27D10B, CT-27D10UB & CT-27D10DB Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO. - Page 38 REPLACEMENT PARTS LIST Models: CT-27D10B, CT-27D10UB & CT-27D10DB Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO.
- Page 39 REPLACEMENT PARTS LIST Models: CT-27D10B, CT-27D10UB & CT-27D10DB Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO.
- Page 40 REPLACEMENT PARTS LIST Models: CT-27D10B, CT-27D10UB & CT-27D10DB Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO.
- Page 41 REPLACEMENT PARTS LIST Models: CT-27D10B, CT-27D10UB & CT-27D10DB Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO.
- Page 42 REPLACEMENT PARTS LIST Models: CT-27D10B, CT-27D10UB & CT-27D10DB Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacing any of these components use only manufacturer’s specified parts. REF NO. PART NO. DESCRIPTION REF NO.
- Page 43 DESCRIPTION OF ABBREVIATIONS GUIDE RESISTOR TYPE TOLERANCE Carbon +/- 1% Fuse +/- 5% Metal Oxide +/- 10% Solid +/- 20% Wire Wound +/- 2% RES, C 270-J-1/4 CAPACITOR TYPE TOLERANCE Ceramic +/- 0.25pF Electrolytic +/- 0.5pF Polyester +/- 1pF Styrol +/- 5% Tantalum +/- 10%...
- Page 44 NOTES - 44 -...
- Page 45 NOTES - 45 -...
- Page 46 NOTES - 46 -...
- Page 47 SERVICEMAN MODE (ELECTRONIC CONTROL) SERVICE ADJUSTMENT VALUES Model _____________________________________________ Ser #_____________ Date_________________ Note: Record the original settings PRIOR to modifying the registers. Service Def. Original Service Def. Original Mode Mode Adjustment Val. Value Value Adjustment Val. Value Value Sub Adjustments Pin Cushion Adjustments SUB COLOR H POSITION...
- Page 48 SERVICEMAN MODE (ELECTRONIC CONTROL) SERVICE ADJUSTMENT VALUES Model _____________________________________________ Ser #_____________ Date_________________ Note: Record the original settings PRIOR to modifying the registers. Service Def. Original Service Def. Original Mode Mode Adjustment Val. Value Value Adjustment Val. Value Value Options Adjustments Comb Filter Adjustments ABL GAIN CLIP LEVEL...