Panasonic CT-1388YD Service Manual
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Panasonic CT-1388YD Service Manual

Panasonic CT-1388YD Service Manual

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Service Manual
This Service manual is issued as a service guide for the models of the NA7D family listed above. Included in this
manual are a set of schematics, 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/Monitor/Receiver
Models
CT-1388YD
CT-1389VYD
CT-2088YD
CT-2089VYD
CT-2788YD
CT-2789VYD
Copyright 2001 by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
and distribution is a violation of law.
ORDER NO. MTNC010941C1
D6
Main Manual
(NA7D)
Panasonic
Chassis
JP358
KP358
VP360
WP360
GP363
HP363
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Summary of Contents for Panasonic CT-1388YD

  • Page 1 ORDER NO. MTNC010941C1 Service Manual Color Television/Monitor/Receiver Main Manual (NA7D) Panasonic Models Chassis CT-1388YD JP358 CT-1389VYD KP358 CT-2088YD VP360 CT-2089VYD WP360 CT-2788YD GP363 CT-2789VYD HP363 This Service manual is issued as a service guide for the models of the NA7D family listed above. Included in this manual are a set of schematics, block diagrams, functional descriptions, alignment procedures, disassembly procedures, and a complete parts list.

  • 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

    Component removal ....4 A-Board schematic left CT-1388YD..48 Chip component installation ..4 A-Board schematic right CT-1388YD .

  • 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.
  • Page 5 Service Notes (continued) IMPORTANT: To protect against possible damage to Procedure: the solid state devices due to arcing or static discharge, 1. Connect receiver to isolator transformer. make certain that all ground wires and CTR DAG wire 2. Apply a monoscope pattern. are securely connected.

  • Page 6: Receiver Feature Table

    Receiver feature table FEATURE\MODEL CT-1388YD CT-1388VYD CT-2088YD CT-2089VYD Chassis No JP358 KP358 VP360 WP360 Family NA7D NA7D NA7D NA7D Tuning block No of channels NO TUNER NO TUNER Menu language English / Spanish English / Spanish English / Spanish English / Spanish...
  • Page 7 Receiver feature table FEATURE\MODEL CT-2788YD CT-2789VYD Chassis No GP363 HP363 Family NA7D NA7D Tuning block # of channels NO TUNER Menu language English / Spanish English / Spanish Closed caption V-Chip 75 Ω input Remote control TV Only Picture tube supplier AMEC AMEC Comb filter...

  • Page 8: Location Of Controls (Receiver)

    Location of controls (receiver) Figure 2. Location of controls (receiver) -- CT-2789VYDE. POWER VOLUME CHANNEL ACTION TV/VIDEO Remote Control HPJ & A/V Sensor Jacks (Actual appearance may vary) 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 9 Location of controls (remote) Cont. (for models with remote control) 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. TV/VIDEO button Press to select TV or Video input.

  • Page 10: Disassembly For Service

    Disassembly for service Back cover C-Board - CRT output Plugs into the socket on the CRT neck. Remove all the screws marked with an arrow( To release the focus wire, use a flat tool to release from the back of the receiver, see Fig. 7. the tab in the socket, see Fig.

  • Page 11: Crt Replacement

    CRT replacement To remove and remount the dag ground braid: a.Unhook the coil spring from the upper right 1. Perform disassembly replacement corner of the CRT. procedure. b.Release the braid loop from the lower left corner 2. Insure that the CRT H.V. Anode button is of the CRT.

  • Page 12: Back Cover Disassembly

    Back cover disassembly Figure 7. Back cover removal (20” tuner model) • 2 screw at the top edge • 1 screw in each lower corner • 6 screw by the A/V board IMPORTANT After servicing the receiver, remember to dress the cables a shown above. - 12 -...

  • Page 13: Main Components Location

    Main components location (Secured to cabinet Anode (HIGH VOLTAGE) by 4 screws on corners) Deflection yoke Convergence yoke Yoke Degaussing wedge coil Speakers secured by screws Chassis rail (some models) A-Board Tuner S-VHS C-Board Flyback Dag ground Main chassis In/Out jacks CRT panel Figure 8.
  • Page 14 Main components location Q351 GROUND IC001 IC050 RED OUT HALF TONE Socket MPU/VCJ Q352 GREEN OUT Q353 BLUE OUT IC002 EEPROM IC003 IC801 IC451 Remote sensor VCO( ) Vertical out IC551 9V REG IC552 5V REG H.OUT D801( ) F801 RELAY TNR001 IC2302...

  • Page 15: 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 IC801’s heat sink when the HOT ground symbol ( ) is used.

  • Page 16: Purity And Convergence Procedure

    Purity and convergence procedure Adjustment is necessary only if the CRT or the For a 1-piece assembly (see Fig. 14): 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 17 Initial center static convergence magnet rings to set vertical green raster at center of screen (see Fig. 16). Connect a dot/cross hatch generator to the receiver Gradually move the deflection yoke & purity rings and tune in a signal. Observe misconvergence at forward and adjust for best overall green screen.
  • Page 18 As the yoke is tilted vertically, the rasters produced outside guns rotate in opposite directions. Figure 17. 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...
  • Page 19 Service 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 service adjustment mode) Note: It is suggested that the technician reads all the way through and understand the following procedure for entering/exiting the service adjustment mode;...
  • Page 20 IMPORTANT Registers marked as FIXED in the following tables, are factory preset, service personnel should not change the default value. Press the power button on the remote control to select the service 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...
  • Page 21 Default Cut-Off Adjustment Adj. Range Level FIXED ACL-REF ACL-REF FIXED To Item C00 ACL-REF FIXED ACL-COEFFICIENT FIXED ACL-COEFFICIENT FIXED FIXED ACL-COEFFICIENT ACL-COEFFICIENT FIXED ACL-WAIT FIXED FIXED ACL-THRESH MACROVISION FIXED OSD SELECT FIXED KILLER ON FIXED KILLER OFF FIXED KILLER TIMER FIXED ACC THRESH FIXED...
  • Page 22 Default OPTIONS (PICTURE) Adjustment Adj. Range Level FIXED COMB BPF COMB 2D FIXED COLOR KILLER LEVEL FIXED PLL KILLER TRESH FIXED ACC SW FIXED To Item S00 FIXED ACC AMP OFF 1 ACC AMP OFF 2 FIXED ACC AMP ON FIXED FIXED ACC AMP CTL...
  • Page 23 Default VCJ Adjustment Adj. Range Level TH ON1 FIXED To Item P00 TH ON2 FIXED FIXED TH ON3 CURVE1 FIXED CURVE2 FIXED CURVE3 FIXED RATIO1 FIXED RATIO2 FIXED RATIO3 FIXED To B Items IMPORTANT NOTE: Always exit the service mode following adjustments.
  • Page 24 Check purity: In service mode (red “CHK” is displayed), place a jumper in AG connector, press the recall button on the remote control to enter to the white purity field check, remove the jumper, press recall again to get to red, green and blue purity fields (if jumper is not removed for color fields, they will be displayed with higher luminosity), In aging mode ( factory mode , yellow “chk”...
  • Page 25 Instructional flow chart for service mode NORMAL MODE IMPORTANT NOTE: Always exit the service mode following adjustments. Momentarily short FA1 to FA2 ( AGING MODE • Yellow “CHK” appears in upper left corner of screen. WHITE • Volume Up/Down operate rapidly. SCREEN •...
  • Page 26 Instructional flow chart for serviceman mode - (continued) USE VOL TO SET THE VALUE CUT-OFF ADJUSTMENTS. C ITEMS. C ITEMS CUT-OFF ADJUSTMENTS Adj. needed? (No remote models) CH up/down on TV (No remote models) POWER on TV (ON REMOTE) POWER USE VOL TO SET THE VALUE (ON REMOTE)

  • Page 27: Service Adjustments (Electronic Controls)

    Service adjustments (electronic controls) Note: It is recommended to allow a 30 min. warm Sub-Brightness up at highest bright (using white screen) before Service DAC (B02) perform any picture adjustment. Due to the characteristics of this chassis, Sub- Brightness adjustment is no required. To obtain a good Sub-Contrast brightness level in the picture, set the service register to the default level: 127.

  • Page 28: White Balance

    Service adjustments (electronic controls, continued) White balance 11. Select blue Cut-Off (C02) register, press R-Tune to close the vertical and see the yellow line, for Service DACs (C00) (C01) (C02) (C03) (C04) (C05) models with no remote press ACTION on TV when Preparation: DAC is displayed on screen.

  • Page 29: Sub-Brightness Final Adjustment

    Service adjustments (electronic controls, continued) Sub-Brightness final adjustment Vertical size Service DAC (B03) Service DAC (C06) Perform this adjustment at the end. After all picture Preparation: Connect a monoscope pattern. adjustments. Procedure: Preparation: 1. In the service mode select vertical size adjustment 1.

  • Page 30: Stereo Separation Adjustment (Stereo Models Only)

    Service adjustments (electronic controls, continued) Stereo separation adjustment 7. Exit Service Mode. Turn off the set. Remove all connections from chassis. (M01 & M02) (stereo models only) Preparation: Clock adjustment 1. Connect an RF signal generator to the RF antenna Service DAC (X03) input.

  • Page 31: Audio Signal Path Block Diagram

    Audio signal path block diagram Figure 33. Audio signal block diagram - 31 -...

  • Page 32: Video Signal Path Block Diagram

    Video signal path block diagram Figure 34. Video signal block diagram - 32 -...

  • Page 33: Parts List

    REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 34 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 35 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 36 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 37 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 38 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 39 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 40 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 41 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 42 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 43 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 44 REPLACEMENT PARTS LIST Models: CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD, CT-2788YD & CT-2789VYD 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. PART NO. DESCRIPTION PART NO.
  • Page 45 NOTES: - 45 -...
  • Page 46 SCHEMATIC NOTES: 1. RESISTOR All resistors are carbon 1/4W resistor, unless otherwise noted by the following marks. Unit of resistance is ohm (Ω), (K=1,000, M=1,000,000) Non Flammable Solid Metal Oxide Metal (Precision and high stability) Wire Wound Thermistor Fusible Positive coefficient Thermistor Flame Proof Rectangular 2.

  • Page 47: A-Board Layout

    A-Board Layout -- Diagrama Impreso Tarjeta-A - 47 -...

  • Page 48: A-Board Schematic Left Ct-1388Yd

    CT-1388YD A-Board Schematic Left Portion -- Diagrama Eléctrico Tarjeta-A Porcion Izquierda - 48 -...

  • Page 49: A-Board Schematic Right Ct-1388Yd

    A-Board Schematic Right Portion -- Diagrama Eléctrico Tarjeta-A Porcion Derecha CT-1388YD - 49 -...

  • Page 50: A-Board Schematic Left Ct-1389Vyd

    CT-1389VYD A-Board Schematic Left Portion -- Diagrama Eléctrico Tarjeta-A Porcion Izquierda - 50 -...

  • Page 51: A-Board Schematic Right Ct-1389Vyd

    A-Board Schematic Right Portion -- Diagrama Eléctrico Tarjeta-A Porcion Derecha CT-1389VYD - 51 -...

  • Page 52: A-Board Schematic Left Ct-2088Yd

    CT-2088YD A-Board Schematic Left Portion -- Diagrama Eléctrico Tarjeta-A Porcion Izquierda - 52 -...

  • Page 53: A-Board Schematic Right Ct-2088Yd

    A-Board Schematic Right Portion -- Diagrama Eléctrico Tarjeta-A Porcion Derecha CT-2088YD - 53 -...

  • Page 54: A-Board Schematic Left Ct-2089Vyd

    CT-2089VYD A-Board Schematic Left Portion -- Diagrama Eléctrico Tarjeta-A Porcion Izquierda - 54 -...

  • Page 55: A-Board Schematic Right Ct-2089Vyd

    A-Board Schematic Left Portion -- Diagrama Eléctrico Tarjeta-A Porcion Derecha CT-2089VYD - 55 -...

  • Page 56: A-Board Schematic Left Ct-2788Yd

    CT-2788YD A-Board Schematic Left Portion -- Diagrama Eléctrico Tarjeta-A Porcion Izquierda - 56 -...

  • Page 57: A-Board Schematic Right Ct-2788Yd

    A-Board Schematic Right Portion -- Diagrama Eléctrico Tarjeta-A Porcion Derecha CT-2788YD - 57 -...

  • Page 58: A-Board Schematic Left Ct-2789Vyd

    CT-2789VYD A-Board Schematic Left Portion -- Diagrama Eléctrico Tarjeta-A Porcion Izquierda - 58 -...

  • Page 59: A-Board Schematic Right Ct-2789Vyd

    A-Board Schematic Right Portion -- Diagrama Eléctrico Tarjeta-A Porcion Derecha CT-2789VYD - 59 -...

  • Page 60: X-Board Schematic 13" & 20" Voltages

    CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD X-Board Schematic -- Diagrama Eléctrico Tarjeta-X X-Board Schematics -- Diagrama Eléctrico Tarjeta-X X-Board IC Voltages IC3001 ..4.10 ..8.93 ..3.37 ..0.00 .

  • Page 61: X-Board Schematic Ct-2788Yd Voltages

    X-Board Schematic, Layout & Voltages - Diagrama Eléctrico y Voltajes Tarjeta-X CT-2788YD X-Board Layout -- Diagrama Impreso Tarjeta-X X-Board Schematic -- Diagrama Eléctrico Tarjeta-X X-Board Voltages IC2321 ..4.46 ..0.00 ..4.50 .

  • Page 62: X-Board Schematic Ct-2789Vyd

    CT-2789VYD X-Board Schematic -- Diagrama Eléctrico Tarjeta-X - 62 -...

  • Page 63: C-Board Schematic 20" & 27", Layout And Voltages

    C-Board Schematic and Layout - Diagrama Eléctrico e Impreso Tarjeta-C C-Board Layout C-Board Schematic (CT-2088YD, CT-2089VYD, CT-2788YD, CT-2789VYD) C-Board voltages Q351 Q352 Q353 Q354 Q355 Q356 6.60 6.40 6.50 3.38 3.38 3.32 163.30 165.30 164.00 6.58 6.41 6.49 6.10 6.10 6.00 2.74 2.80...

  • Page 64: C-Board Schematic 13", Voltages; H-Board Schematic & Layout

    C-Board Schematic & Voltages, H-Board Schematic & Layout - Diagrama Eléctrico y Voltajes Tarjeta-C, Diagrama Eléctrico e Impreso Tarjeta-H H-Board Schematic C-Board Schematic (CT-1388YD, CT-1389VYD) H-Board Layout C-Board voltages Q351 Q352 Q353 Q354 Q355 Q356 6.45 6.20 6.40 3.30 3.40 3.40...

  • Page 65: G-Board Schematic 13" & 20", Layout

    G-Board Schematic and Layout - Diagrama Eléctrico e Impreso Tarjeta-G CT-1388YD, CT-1389VYD, CT-2088YD, CT-2089VYD - 65 -...

  • Page 66: G-Board Schematic 27

    G-Board Schematic - Diagrama Eléctrico Tarjeta-G G-Board CT-2789VYD G-Board CT-2788YD - 66 -...

  • Page 67: A-Board Voltages And Waveforms

    A-Board Voltages and Waveforms A-Board Voltages All Models -- Todos los Modelos A-Board Waveforms IC001 IC005 IC451 Q001 Q006 Q007 ..0.00 ..0.00 ..5.01 ..8.22 0.00 2.64 2.77...
  • Page 68 NOTES - 68 -...
  • Page 69 NOTES: - 69 -...
  • Page 70 ® Printed in USA K01100600PL1016 - 70 -...

This manual is also suitable for:

Ct-1389vydCt-2088ydCt-2089vydCt-2788ydCt-2789vyd

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