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Panasonic CT-34WX50 Service Manual
Panasonic CT-34WX50 Service Manual

Panasonic CT-34WX50 Service Manual

Wide screen tv

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The service technician is required to read and follow the "Safety Precaution" and "Important Safety Notice" in this service manual.
Specifications
Power Source
AC120V, 60Hz
Power Consumption:
Average use: 193.7 W (Maximum Current: 3.7
Stand-by condition: 0.36W
CRT
34-inch, 16:9 aspect ratio (Viewing area)
Applicable signals
Color system : NTSC
Screen size
29.36"(745.9mm)(W)x16.5"(419.5mm)(H)x33.68"(855.7mm)(D)
ANODE Voltage
33.0±1.0kV at zero beam current
Accessories Supplied
Remote control EUR511162
Battery (2xR6 (AA) Size)
Warranty
Speaker Out
5 Speakers
21W(7W+7W+7W) (10% THD)
Impedance 8
Dimension (WxDxH)
34.4"(874mm) x 23.0"(585mm)x25.1"(637mm)
CT-34WX50
PX1T Chassis
Weight (Mass)
174.0lbs (79kg) Net
Connection terminals
AV INPUT 1-4
VIDEO 1.0Vp-p (75)
(Phono Jack Type)
S-VIDEO
(Mini DIN 4-pin)C:0.286 Vp-p (75)
AUDIO L-R 0.5 Vrms
(Phono Jack Type x 2)
AV PROG. OUT
VIDEO 1.0Vp-p (75)
(Phono Jack Type)
S-VIDEO
(Mini DIN 4-pin)C:0.286 Vp-p (75)
AUDIO L-R 0.5 Vrms
(Phono Jack Type x 2)
TO AUDIO AMP
AUDIO L-R 0.5 Vrms
(Phono Jack Type x 2)
COMPONENT VIDEO
INPUT1-2
Y 1.0 Vp-p (including synchronization)
P
/P
B
R
AUDIO L-R 0.5 Vrms
(Phono Jack Type x 2)
Design and Specifications are subject to change without
notice.
Weight and Dimensions shown are approximate.
ã
2000 Matsushita Electric Industrial Co.,Ltd.
All right reserved. Unauthorized copying and
distribution is a violation of law.
ORDER NO.ITD0001002C1

Wide Screen TV
Y:1.0Vp-p (75)
Y:1.0 Vp-p (75)
 0.35 Vp-p

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Summary of Contents for Panasonic CT-34WX50

  • Page 1 ORDER NO.ITD0001002C1 Wide Screen TV CT-34WX50 PX1T Chassis The service technician is required to read and follow the “Safety Precaution” and “Important Safety Notice” in this service manual. Weight (Mass) Specifications 174.0lbs (79kg) Net Power Source AC120V, 60Hz Connection terminals AV INPUT 1-4 VIDEO 1.0Vp-p (75)
  • Page 2                                            !      "  #     $     %& '  (  )*        (    )+     %& '  (  )!
  • Page 3 Safety Precautions 2. Connect a 1.5k, 10W resistor, in parallel with a 0.15µF capacitor between each exposed metallic part of the set and an earth ground such as a water pipe. General Guidelines 3. Use a high impedance AC voltage meter to measure the voltage across the resistor.
  • Page 4 HOLD DOWN SAFETY CIRCUIT Service Instruction: Procedure to apply INFORMATION silicone to the seal control R720 Purpose To monitor the high voltage, the positive DC voltage from the To prevent any adjustment on the sealed control after final cathode D512 is applied through R788 and other resistors to adjustment is done at factory.
  • Page 5 Self-check Function When symptoms like "the power fails sometimes" or "sometimes there is no picture and/or sound" can not be confirmed at the time of servicing, the self-check function can be used to confirm the occurrence and to find the defective circuit. In case of "power failure", flashing of the "VIDEO IN"...
  • Page 6 Self check for the power supply Flashing timing table When an abnormality has occurred for a power supply line, the protection circuit (power supply protector/detection of abnormal high voltage) operate and cuts the power supply. At this time, the defective line can be identified by the number of flashes (red) of the "Power supply/function standby/video reception"...
  • Page 7 Chassis Board Layout L-Board H-Module U-Module AG-Module CC-Module DD-Module DG-Module Q-Module P-Board A-Board G-Board K-Board D-Board Non-Serviceable Boards Serviceable Boards (See Note) Board Number Board Designation Board Number Board Designation TNPA1520AC DD-Module, DC DC TNPA1531 G-Board, Front terminal TNPA1523AB Q-Module, V-Deflection TNPA1532 K-Board, LED TNPA1524...
  • Page 8 Location of Lead Wiring RING CLAMPER TWEETER(R) 45˚±10˚ TWEETER(L) GRAY ORANGE WHITE CENTER SPEAKER D-BOARD SPEAKER(L) SPEAKER(R) A-BOARD IC451 TO DY FROM CY Replace AC cord L-BOARD - 8 -...
  • Page 9 Service Hints Before servicing Fig.1 Positions of the screws fixing the rear cover (1) Remove the screws fixing the rear cover (11 pcs.: Refer to Fig. 1). Fig.2 How to tilt the chassis (2) Remove the rear cover by raising the chassis a little and pulling to the rear .
  • Page 10 Inspection of the P-Board Fig.4 Inspection of the P-Board As the P-Board can not be inspected from the pattern side, refer to the pattern side/parts side of the circuit dia- Top View gram (Page 66, 67), and perform the inspection by bring- ing the tester into contact with the jumper wires and parts.
  • Page 11 Exchange method for CC-Module, U-Moudle, AG-Module, DG-Module and Q-Module *Remove the H-Module in advance. (Refer to the preceding item) Fig. 6 Exchange of each module-1 (View from above) Module Plate U-Module DD-Module DG-Module Lead Wire CC-Module AG-Module Fig. 7 Exchange of each module-2 $0 (1) Remove the screw (1 screw: (2) Remove the lead wire.
  • Page 12 Entry into service adjustment mode Hold the "VOL -" button inside the door of the operation section of this unit pressed and press the "RECALL" button on the remote control three times in a row (within 2 sec.). (Refer to Fig. 1.) Fig.1 Entry into service adjustment mode LIGHT...
  • Page 13 How to Read the Serve Adjustment Mode Inter CAT 1999 How to read the diagram Press [ACTION] Concurrent 97/98/99 Button Press i.Trace 94-96 Reception method Color temperature [ ], [ ] Premium 94 Button eXtended 92-93/95 NTSC FULL WARM hyerOne 94 FLESH TONE R-Y ANGLE Cyan: Adjustment data...
  • Page 14 Concurrent Mode Function Outline: MPU controls the functions switching for each ICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Concurrent Mode. 1.Selection of IIC Mode Press and hold Volume down [-] key on the front panel of the unit and press RECALL[ ] Button on the remote control 3 times quickly within 2 seconds.
  • Page 15 2.HYBRID GAMMA To change the screen (item) in Concurrent mode, press “3” or “4” of 10 key button. Then Data can be changed by pressing “Vol- ume +” or” Volume +” button. Display Average Data REAL CONTRAST REAL BRIGHT R DRIVE B DRIVE G DRIVE R CUT OFF...
  • Page 16 5.DEFECTION ADJUSTMENT To change the screen (item) in Concurrent mode, press “3” or “4” of 10 key button, Then Data can be changed by pressing “Vol- ume +” or” Volume +” button. Display Average Data H-POSITION H-SIZE SIDE-PCC H-PARALLEL H-LINEARTY V-POSITION TRAPEZOID V-LINEARITY...
  • Page 17 Service Adjustment Mode Exchange parts and required adjustment         MEMORY DEF. YOKE F.B.T. (IC5001) MODULE MODULE MODULE MODULE R-YANGE R-Y AXIS GAIN FLESH TONE SUB TINT SUB COLOR REAL CONTRAST REAL BRIGHT R DRIVE B DRIVE G DRIVE HYBRID GAMMA R CUT OFF B CUT OFF G CUT OFF...
  • Page 18 Adjustment method Caution items for each adjustment method [Switching of the color temperature] ... Switching of the color temperature between "WARM", "NORMAL", and "COOL" for each adjustment is not done even when "COLOR TEMP" of "PICTURE ADJ" or color temperature fine adjustment of "Technical" is selected. Accordingly, enter into Concurrent mode, press the "AV ADJ"...
  • Page 19 Deflection Adjustment 1. Deflection correction When DG-Module etc has been exchanged and the H/V-POSITION of the picture, the amplitude, etc. is to be corrected, select “DEF ADJ” in Concurrent mode and adjust the deflection system. “DEF ADJ” has 13 items (sub-items of the Concurrent mode) and adjustment of the image details is possible for each mode/aspect.
  • Page 20 (2) Offset input method Offset from NTSC Receive an NTSC signal and select “DEF ADJ”. Offset from 1080i Receive a 1080i signal and select “DEF ADJ”. After completion of adjustment in NTSC “FULL” mode or 1080i, press hte “NORMAL adjustment value to which adjustment has been made at the time of NTSC FULL mode or 1080i respectively as the initial value, and then the data will be shifted automatically from that value.
  • Page 21 3. Adjustment in NTSC "FULL" mode (1) Receive an NTSC signal and set the aspect ratio to "FULL" mode. (2) Enter into service adjustment mode and select "DEF ADJ" in Concurrent mode. (3) Press the button " " on the remote control and receive the built-in cross-hatch pattern of this unit. (4) First, match the center of the built-in cross- hatch pattern (center adjustment).
  • Page 22 4. Adjustment in NTSC "NORMAL" mode (1) Receive an NTSC signal and set the aspect ratio to "NORMAL" mode. (2) Enter into service adjustment mode and select the Concurrent mode "DEF ADJ". (3) For "SIDE-PCC", "H-PARALLEL", "V-POSITION", "TRAPEZOID", "V-LINEARITY", "V-SIZE", "EW-CORNERTOP", "EW- CORNERBOTTOM", and "V-S CORRECTION", enter the same adjustment values as for the adjusted NTSC "FULL"...
  • Page 23 5. Adjustment in NTSC "ZOOM" mode (1) Receive an NTSC signal and set the aspect ratio to "ZOOM" mode. (2) Enter into service adjustment mode and select "DEF ADJ" in Concurrent mode. *When entering into Concurrent mode, the screen position and the amplitude become standard. (3) Press the button "...
  • Page 24 6. Adjustment in NTSC "JUST" mode (1) Receive an NTSC signal and set the aspect ratio to "JUST" mode. (2) Enter into service adjustment mode and select "DEF ADJ" in Concurrent mode. (3) For "H-POSITION", "SIDE-PCC", "H-PARALLEL", "V-POSITION", "TRAPEZOID", and "PCC", enter the same adjustment val- ues as for the adjusted NTSC "FULL"...
  • Page 25 7. 1080i adjustment (1) Receive a 1080i. (2) Enter into service adjustment mode and select "DEF ADJ" in Concurrent mode. (3) Press the button " " on the remote control and receive the built-in 1080i cross-hatch pattern of this unit. (4) First, match the center of the built-in cross-hatch pattern (center adjustment) Select "V/H-POSITION", perform adjustment on the basis...
  • Page 26 8. Adjustment methods for distortion correction "H-POSITION" adjustment  Press the "Volume +, Volume - " buttons on the remote control and adjust so that the center of the vertical lines of the built-in cross-hatch pattern becomes stable at the specified value of the following table.
  • Page 27 "SIDE-PCC" correction  When the vertical lines of the built-in cross-hatch pattern show bow-shaped distortion (like the dotted lines in the figure on the left), use the center of the vertical lines as reference, press the "Volume +, Volume - " buttons on the remote control and adjust so that the reference line NTSC FULL WARM becomes a straight line.
  • Page 28 "V-POSITION" adjustment  Press the "Volume +, Volume - " buttons on the remote control and adjust so that the center of the horizontal lines of the built-in cross-hatch pattern becomes stable at the specified value of the following table. NTSC FULL WARM DEF ADJ V-POSITION...
  • Page 29 "V-SIZE" adjustment  Press the "Volume +, Volume - " buttons on the remote control and adjust so that the position 4 lines to the top from the center of the horizontal lines of the built-in cross- hatch pattern ... (K) and the position 4 lines to the bottom from the center...
  • Page 30 "EW-CORNER TOP" adjustment  When the upper part of the vertical lines at the outer sides of the built-in cross-hatch pattern shows distortion at the top (refer to the dotted lines in the figure on the left), press the "Volume +, Volume - " buttons on the remote control and adjust so that the distorted lines become vertical lines.
  • Page 31 Focus adjustment (1) Receive a NTSC signal. (2) Enter into service adjustment mode and select "DEF ADJ" in Concurrent mode. NTSC FULL WARM (3) Press the button " " on the remote control and receive DEF ADJ the built-in cross-hatch pattern of this unit. H-POSITION (4) Adjust the F1 control of the flyback transformer so that the focus is balanced for the center line (vertical) of the cross-...
  • Page 32  - 32 -...
  • Page 33 Conductor Views P-BOARD TNPA1675 Parts Location P-BOARD TRANSISTOR Q802 Q803 Q809 TPP1 TPP2 TPP3 TPP4 TPP5 TPP6 TPP7 TPP8 TPP9 TPP10 TPP11 TPP12...
  • Page 34 A-BOARD (FOIL SIDE) TNPH0340...
  • Page 35 Parts Location A-BOARD (FOIL SIDE) Q3155 TPA22 Q3157 TPA23 IC1901 TP91 Q3158 TPA24 IC1903 TP92 Q3174 TPA25 IC2301 TP126 Q3175 TPA26 IC2302 TP128 Q3176 TPA27 IC2401 TP137 Q5001 TPA28 IC2402 TP160 Q5002 TPA29 IC2403 TP161 Q5003 TPA30 IC2404 TP162 Q5004 TPA31 IC2405 TP163...
  • Page 36 Parts Location A-BOARD (COMPONENT SIDE) IC1901 IC2301 IC2401 IC2402 IC4803 IC5001 IC5002 IC5003 TRANSISTOR Q5002 - 36 -...
  • Page 37 A-BOARD (COMPONENT SIDE) TNPH0340...
  • Page 38 D-BOARD TZTNP010ERR...
  • Page 39 Parts Location L-BOARD IC3801 TPL1 IC3802 TPL2 IC3803 TPL3 TPL4 TRANSISTOR TPL5 TPL6 Q902 TPL8 Q951 TPL9 Q952 TPL10 Q955 TPL11 Q956 TPL12 TPL17 L-BOARD TNPA1536AB Parts Location D-BOARD IC500 TPD1 TPP13 IC751 TPD2 TPP14 IC801 TPD3 TPP15 IC802 TPD4 TPP16 IC811 TPD5...
  • Page 40 G-BOARD TNPA1531AB K-BOARD TNPA1532...
  • Page 41 Schematic Diagrams Remote Control Transmitter EUR511162 Schematic Diagram Notice Important Safety Notice Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacture's specified parts. Notes: 1. Resistor LED9 LED8 LED7 LED6 LED5 LED4 LED3...
  • Page 51 Parts Location Note: The number on mechanical parts indicates Ref. No. Mechnical Replacement Parts List Front View Rear View 12 PICTURE TUBE 11 CABINET 3 DEFLECTION YOKE 9 DEGAUSSING COIL 2 SPEAKER 7 BOTTOM DOOR 4 POWER BUTTON 5 ORNAMENT PANEL (L) 6 ORNAMENT PANEL (R) 8 REAR TERMINAL FLAME 10 AC POWER CORD...
  • Page 52 CLAMPER TMM16452 CLAMPER EAB12149B MAIN SPEAKER EAS12D123Y0 SPEAKER (CENTER) EAS13KH14E SPEAKER (TWEETER) EUR511162 TRANSMITTER KDY4WHA64F DEFLECTION YOKE TBMA059 PANASONIC BADGE TBMD890 MODEL NAME PLATE U.S.A. TBMD897 MODEL NAME PLATE CANADA TBXA24302 POWER BUTTON TEKC001 DAMPER TEKC011 DAMPER TEKX008 DOOR CATCHER...
  • Page 53                                                                                                                    !   "#  $%& $%& $ '"()!*+ # !**,-./)!0+1 $#,2!.!*342 **!52 4(*6             # &# 2 & 9!: # &#  # &9*"(2 2 &2 ;...
  • Page 54 Ref. No Part No. Part Name & Description Pcs. Remarks Ref. No Part No. Part Name & Description Pcs. Remarks A1-A3 TJS5A9190 10P CONNECTOR C831 ECKD3D102KBP C 1000PF, K, 2KV A4-A6 TJSF20016 16P CONNECTOR C832 ECA1HHG101 E 100UF, 50V A7 TJS3A8980 24P CONNECTOR C833 ECKD3A471KBP C 470PF, K, 1KV...
  • Page 55 Ref. No Part No. Part Name & Description Pcs. Remarks Ref. No Part No. Part Name & Description Pcs. Remarks C2448 ECJ2VB1E104K C 0.1UF, K, 25V D8-11 TJS5A9420 8P CONNECTOR C2449 ECA1HM4R7 E 4.7UF, 50V D17 TJSF19916 16P CONNECTOR C2450 ECA1HM330 E 33UF, 50V D025 MA165 DIODE...
  • Page 56 Ref. No Part No. Part Name & Description Pcs. Remarks Ref. No Part No. Part Name & Description Pcs. Remarks G5 TJSF19916 16P CONNECTOR L881 TALL08N101KA INDUCTION COIL G7 TJS3A9650 4P CONNECTOR L904 TLTABT560K PEAKING COIL G8 TJS3A9670 6P CONNECTOR L953 EXCELSA35 BEAD CHOKE G31 TJS3A9650...
  • Page 57 Ref. No Part No. Part Name & Description Pcs. Remarks Ref. No Part No. Part Name & Description Pcs. Remarks R536 ERDS2TJ101 C 100 OHM, J,1/4W R905 ERDS2TJ223 C 22KOHM, J,1/4W R537 ERDS2TJ272 C 2.7KOHM, J,1/4W R906 ERDS2TJ472 C 4.7KOHM, J,1/4W R538 ERDS2TJ103 C 10KOHM, J,1/4W R908 ERDS2TJ471...
  • Page 58 Ref. No Part No. Part Name & Description Pcs. Remarks Ref. No Part No. Part Name & Description Pcs. Remarks R2466 ERJ6GEYJ104 M 100KOHM,J,1/10W R6802 ERDS2TJ561 C 560 OHM, J,1/4W R2467,68 ERJ6GEY0R00 M 0 OHM,J,1/10W R2469 ERJ6GEYJ102 M 1KOHM,J,1/10W RL001 TSEH8011 RELAY R2470 ERJ6GEYJ183 M 18KOHM,J,1/10W...