Panasonic PT-50LCZ70 Service Manual
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Panasonic PT-50LCZ70 Service Manual

Panasonic PT-50LCZ70 Service Manual

Multi media display, pbf solder lead free
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Multi Media Display
PT-50LCZ70
PT-56LCZ70
PT-61LCZ70
PT-50LCZ7
PT-56LCZ7
PT-61LCZ7
PT-50LCZ70-K
PT-56LCZ70-K
PT-61LCZ70-K
Vol. 1
© 2007 Panasonic Shikoku Electronics Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. MKE0706852CE
B2
Unauthorized
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  • Page 1 ORDER NO. MKE0706852CE Multi Media Display PT-50LCZ70 PT-56LCZ70 PT-61LCZ70 PT-50LCZ7 PT-56LCZ7 PT-61LCZ7 PT-50LCZ70-K PT-56LCZ70-K PT-61LCZ70-K Vol. 1 © 2007 Panasonic Shikoku Electronics Co., Ltd. All rights reserved. Unauthorized copying distribution is a violation of law.

  • Page 2: Table Of Contents

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 CONTENTS Page Page 1 Safety Precautions 12.2. INTERCONNECTION SCHEMATIC DIAGRAM 1.1. General Guidelines 12.3. POWER SCHEMATIC DIAGRAMS 1.2. Leakage Current Cold Check 12.4. SD/HDMI SCHEMATIC DIAGRAM 1.3. Leakage Current Hot Check 12.5.

  • Page 3: Safety Precautions

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 1 Safety Precautions 1.1. General Guidelines 1. For continued safety, no modification of any circuit should be attempted. 2. Disconnect AC Plug before disassembling this unit. 3. It is advisable to use an isolation transformer in the AC supply before servicing.

  • Page 4: Warning

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 2 Warning 2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices.

  • Page 5: Service Navigation

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3 Service Navigation 3.1. Introduction This service manual contains technical information which will allow service personnel´s to understand and service this model. Please place orders using the parts list and not the drawing reference numbers.

  • Page 6: Specifications

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 4 Specifications...

  • Page 7: Service Mode

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 5 Service Mode INDICATIONS FOR ERROR CONDITIONS Each Indicator facilitates finding the cause of an error. When an error is detected, the Lamp goes off and the indicators on the front flash.
  • Page 8 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 MAIN PARTS LOCATION <Front View> Power Switch /Operation P.C.B. Front Jack /Operation P.C.B. POWER LED LAMP LED SD/HDMI P.C.B. Front Cover Unit Front Door <Rear View> OPT/TV Unit RF AMP Front Fan Power Supply P.C.B.
  • Page 9 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 SELF CHECK *3. SOS History The number of time SOS History In this mode, the following information can be confirmed on the Power Indicator flashed screen: : 01 ~ 09...
  • Page 10 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 SERVICE ADJUST MODE Service Adjust Mode Enter: In this mode, the following information can be confirmed on the VOLUME DOWN button + RECALL key (3 times) screen: (in power on condition)
  • Page 11 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 MMD-CHK 1/8~8/8 and internal pattern Perform the Picture Position adjustment by pressing VOL+/- key, and display the internal pattern for LCD-CHK, GC-CHK. 3 key 3 key 3 key 3 key...
  • Page 12 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 TO READ THE PEAKS SOFTWARE LAMP CAUTION VERSION AND TV MICROCONTROLLER The Lamp Unit becomes very hot during operation. When replacing the Lamp Unit, wait until it has cooled off (1 hour or SOFTWARE VERSION more).
  • Page 13 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 RESET USER’S MEMORY FUNCTIONS DO NOT UNPLUG AC CORD DURING COOLING OPERATION Use when moving unit to a new location, or when First Time Setup needs to be done over, or if the password The lamp cooling fan will continue to operate for approximately 30 seconds after the power is turned off.
  • Page 14 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 WIRE AND LEAD POSITION DIAGRAM OF THE UNIT After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit.
  • Page 15 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit. Note: Use extreme care especially for the following.
  • Page 16 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit. Note: Use extreme care especially for the following.
  • Page 17 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit. Note: Use extreme care especially for the following.
  • Page 18 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit. Note: Use extreme care especially for the following.

  • Page 19: Troubleshooting Guide

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 6 Troubleshooting Guide 6.1. Troubleshooting Hints for Block Level Repair MAIN PARTS LOCATION <Front View> Power Switch /Operation P.C.B. Front Jack /Operation P.C.B. POWER LED LAMP LED SD/HDMI P.C.B.
  • Page 20 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 INDICATIONS FOR ERROR CONDITIONS Each Indicator facilitates finding the cause of an error. When an error is detected, the Lamp goes off and the indicators on the front flash.
  • Page 21 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Protection Circuit SOS terminal of IC6004 (TV microcontroller) IC6004 (TV MICROCONTROLLER) IC4501 (AUDIO POWER AMP) AC STOP(L) Q4502 SOUND SOS (H) SOUND SOS (L) DTV+9V SENS (SOS(L)) IC1107 IC8001 (PEAKS) SUB+5V SENS (SOS(L)) REG.
  • Page 22 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 [POWER Indicator three blinks] Abnormal voltage (SUB+5V line) detection circuit SUB+5V IC1107 IC6004 (TV MICROCONTROLLER) Normal REG. SUB+5V SENS SOS: 0V on SUB+5V line MAIN P.C.B. [POWER Indicator four blinks] Abnormal voltage (MAIN+3.3V line) detection circuit...
  • Page 23 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 [POWER Indicator nine blinks] Communication error between Peaks (IC8001) and TV microcontroller (IC6004) detection circuit IC6004 (TV MICROCONTROLLER) IC8001 (PEAKS) Normal PANEL STATUS (SOS (L)) PANEL STATUS (SOS (L)) MAIN P.C.B.
  • Page 24 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 [LAMP Indicator eight blinks] LAMP Fan stops detection circuit [LAMP Indicator nine blinks] OPT Fan stops detection circuit [LAMP Indicator ten blinks] Front Fan or Rear Fan stops detection circuit [LAMP Indicator eleven blinks] Rear Fan or Front Fan stops detection circuit [LAMP Indicator twelve blinks] Rear Jack P.C.B.
  • Page 25 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 AC stop detection circuit T801 D802 FULL-WAVE STBY+7V RECTIFIER IC6004 (TV MICROCONTROLLER) Normal Q803-Q805 D811 AC VOLTAGE AC STOP (L) DETECT POWER P.C.B. MAIN P.C.B. Over current detection circuit...
  • Page 26 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 How to solve problems indicated by the Error Indication (The symptom of all errors is that the Lamp goes off) Note: Before performing troubleshooting, confirm that all connector cables in the unit are connected correctly.
  • Page 27 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 How to solve problems indicated by the Error Indication (The symptom of all errors is that the Lamp goes off) Note: Before performing the troubleshooting, confirm that all connector cables in the unit are connected correctly.
  • Page 28 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Note: LAMP DOES NOT LIGHT UP 1. Before performing troubleshooting, confirm that all connector cables are connected properly. 2. When repeating troubleshooting, be sure to Plug in the AC Cord.
  • Page 29 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 HOW TO DETERMINE WHICH P.C.B. IS DEFECTIVE No picture or abnormal picture ABNORMAL PICTURE: No Picture Color (Black and White picture) Abnormal Picture Color Unsynchronized Picture Dark Picture (Only Video1 OR 2 input is NG.) Replace the OPT/TV Unit or the Rear Jack P.C.B.
  • Page 30 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 No sound from built-in both L-CH and R-CH Speakers (All input are NG.) Check that there is an audio signal to the Audio Out Replace the OPT/TV Unit Terminal from all input terminals.
  • Page 31 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Tips for determining defective circuit in case of picture problem REAR JACK P.C.B. MAIN P.C.B. DRIVE P.C.B. IC3001 CN3501 CN3001 COMPONENT IN 1,2 VIDEO IN 1,2 S-VIDEO IN VIDEO Circuit shown in gray FRONT JACK/OPERATION P.C.B.
  • Page 32 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 HOW TO DISPLAY THE INTERNAL PATTERN Service Adjust Mode Enter: VOLUME DOWN button + RECALL key (3 times) (in power on condition) RECALL (X3) (on the front) (on the remote)

  • Page 33: Disassembly And Assembly Instructions

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 7 Disassembly and Assembly Instructions 7.1. Cabinet Section DISASSEMBLY METHOD OF CABINET SECTION Cabinet section contains following removal procedures: HOW TO REPLACE THE LAMP UNIT Removal of Rear Cover Removal of OPT/TV Unit Removal of Lamp Shield Case Ass’y with Fans...
  • Page 34 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 HOW TO REPLACE THE LAMP UNIT Note: Lamp debris may be noticed in the lamp compartment area after the rear cover is removed. If present, follow the notes in the disassembly procedure.
  • Page 35 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Before trying to remove the OPT/TV Unit, check the area under the Lamp shown by the arrow in the following picture. Note: If debris is present, clean the debris with a vacuum cleaner.
  • Page 36 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3) Pull out the OPT/TV Unit. Cabinet Note: Pull OPT/TV Unit If debris is present, remove all dust and debris with a vacuum cleaner. OPT/TV Unit Fig. D1-3...
  • Page 37 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 c. Removal of Lamp Shield Case Ass’y with Fans 1. Remove the Thermal Fuse by removing the screw, and disconnect Connector CN1102. 2. Disconnect Connectors CN1, CN151, CN2751, CN2752, CN2753, CN6005 and release from the clampers.
  • Page 38 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3. Remove the Lamp Shield Case Ass’y with Fans by removing the 8 screws. Lamp Shield Case Ass'y with Fans Lift up Lamp Shield Case Ass'y with Fans Note: Clean the surface of the plate under the Lamp with a vacuum cleaner.
  • Page 39 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 d. Removal of Lamp Unit 1. Disconnect two connector cables from the Lamp Ass’y. 2. Remove the Lamp Ass’y by removing the 6 screws. LAMP CAUTION: 453 453 The Lamp Unit becomes very hot during operation.
  • Page 40 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3. Remove the 4 plates (Lamp Stay Plate, Lamp Bracket Top, Lamp Support Shield and Lamp Bracket Under) by removing the 11 screws. Lamp Stay Plate Lamp Bracket Top...
  • Page 41 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 e. Removal of Lamp Fan 1. Remove the Lamp Fan from the Lamp Ass’y by removing the 7 screws using the Hex Wrench (2.5 mm). Name Plate Lamp Fan...
  • Page 42 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Reassembly Note for Lamp Shield Case Ass’y: Before installing the Lamp Shield Case Ass’y with Fans, wire the Lamp Fan Cable and the Front Fan Cable as shown. Place...
  • Page 43 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REMOVAL OF THE OPT/TV UNIT 1. Remove the right Support Shield by releasing the Locking Tab. 2. 1) Remove the 4 screws. 2) Disconnect Connectors CN3502 (Ope), CN4501 (Speaker), CN5503 (SD), CN6003 (Power SW) and CN8201 (HDMI).
  • Page 44 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3) Pull out the OPT/TV Unit. Cabinet Pull OPT/TV Unit OPT/TV Unit Fig. D2-2...
  • Page 45 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REMOVAL OF THE RF AMP POWER SUPPLY P.C.B. 1. Remove the OPT/TV Unit. Refer to Steps 1~2 in "REMOVAL OF THE OPT/TV UNIT." 2. 1) Disconnect Connectors CN151, CN1 on the RF AMP Power Supply P.C.B.
  • Page 46 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REMOVAL OF THE TUNER P.C.B., THE REAR JACK P.C.B. AND THE POWER P.C.B. 1. Remove the OPT/TV Unit. Refer to Steps 1~2 in "REMOVAL OF THE OPT/TV UNIT." 2. Remove the Tuner P.C.B. by removing the 3 screws (CN8970 is disconnected).
  • Page 47 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 4. 1) Disconnect Connectors CN1, CN1101 and remove the 5 screws. 2) Slide out the Power P.C.B. with the Shield together while releasing the 6 locking tabs. Locking Tab...
  • Page 48 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3) Remove the Power P.C.B. by removing the 5 screws and the 2 spacers, then disconnect the AC Cord. Spacers AC Cord Power P.C.B. Fig. D4-3...
  • Page 49 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REMOVAL OF THE FRONT COVER UNIT AND THE DISPLAY 1. Remove the Rear Cover. Refer to Step a in "HOW TO REPLACE THE LAMP UNIT." 2. (For 50 inch models) 50 inch model 1) Open the Front Door about 45 degrees and then pull it out gently.
  • Page 50 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3) Hold the portion of the bottom of the front cover and the portion of the side with fingers and pull forward slightly at the portion and pull downward slightly...
  • Page 51 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 2. (For 56/61 inch models) 56/61 inch model 1) Open the Front Door about 45 degrees and then pull it out gently. 2) Remove the 3 screws. Fig. D5-1b...
  • Page 52 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3) Hold the portion of the bottom of the front cover and the portion of the side with fingers and pull forward slightly at the portion and pull downward slightly at the portion to release locking tabs.
  • Page 53 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Reassembly Notes for Front Cover Unit: 50 inch model 1) When installing the front cover, place portions A(X2) in proper position. Then, slide the front cover upward. Confirm the tabs(X8) on the top of the front cover are in position while sliding up.
  • Page 54 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3) Hold and press it about 45 degrees at the following portion to lock completely. Confirm there is no gap on the top viewing from the front and no bend on the bottom portions viewing from side.
  • Page 55 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Reassembly Notes for Front Cover Unit: 56/61 inch model 1) When installing the front cover, place the locking tabs A(X2) in proper position. Locking tab A Locking tab A Locking tab A 2) Then, slide the front cover upward.
  • Page 56 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3) Then, press upward slightly at the following portions(X3) of the bottom of the front cover in the order shown below to lock the locking tabs. 5 inch 5 inch 7 inch 4) Hold and press it about 45 degrees at the following portion to lock completely.
  • Page 57 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3. 1) To remove Display, remove the 5 screws from front side. 2) Lift up the Display. Display Reassembly Note: Tighten the 5 screws in order. 1 2 3 4 5...
  • Page 58 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REMOVAL OF THE SCREEN UNIT FROM THE DISPLAY 1. Remove the Display. Refer to Steps 1 ~ 3 in "REMOVAL OF THE DISPLAY." 2. Remove the Screen Unit by removing the 14 screws.
  • Page 59 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 3. 1) Remove the 4 Screen Support Corners, 2 Screen Support H Units and the 2 Screen Support V Units by removing the 22 screws. 2) Remove the Fresnel Lens and the Lenticular Screen.

  • Page 60: Measurements And Adjustments

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 8 Measurements and Adjustments 8.1. Adjustment Procedures 1 WHEN INSTALLING THE OPT/TV UNIT 3. To enter Service Adjust Mode, hold the VOLUME DOWN button on the unit and press the RECALL key three times INTO THE UNIT AT THE USER’S...
  • Page 61 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 a. Focus Adjustment b. Mechanical Picture Position Adjustment (Tilt) 1) Confirm that the black line (C, D) in the nine portions are 1) Loosen the 4 Screws on the Projection Unit.
  • Page 62 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 c. Electrical Picture Position Adjustment (H/V) 1) Adjust OPT HPOS so that "C" is symmetrical to "D." by pressing the VOLUME UP/DOWN key on the remote to change the value.

  • Page 63: Maintenance

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 9 Maintenance 9.1. Cleaning Methods THE SCREEN UNIT AND THE MIRROR THE PROJECTION LENS THE SCREEN UNIT (Lenticular Screen, Fresnel Lens) Use lens cleaning paper and cleaner available at your local camera shop, etc.

  • Page 64: Voltage Chart And Waveform Of Connectors

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 10 Voltage Chart and Waveform of Connectors MAIN P.C.B. POWER P.C.B. SD/HDMI P.C.B. MODE POWER WF NO. MODE POWER WF NO. MODE POWER WF NO. MODE POWER WF NO.
  • Page 65 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 RF AMP POWER REAR JACK P.C.B. TUNER P.C.B. SUPPLY P.C.B. MODE POWER WF NO. MODE POWER WF NO. MODE POWER WF NO. MODE POWER WF NO. MODE POWER WF NO.
  • Page 66 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 V1 +1.00 Vp-p V1 +0.70 Vp-p 0.5 V 20 µs 0.2 V 20 µs V1 +1.00 Vp-p V1 +2.00 Vp-p 0.2 V 20 µs 0.5 V 20 µs V1 +0.80 Vp-p V1 +1.50 Vp-p...

  • Page 67: Block Diagrams

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 11 Block Diagrams OVERALL BLOCK DIAGRAM REAR JACK P.C.B. MAIN P.C.B. IC4501 IC4101 CN3501 CN3001 CN4501 SPEAKER IC4001 (R-CH) COMPONENT AUDIO IN 1 (L/R) COMPONENT AUDIO AUDIO IN 1 (L/R)
  • Page 68 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7...

  • Page 69: Schematic Diagrams

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 12 Schematic Diagrams 12.1. SCHEMATIC DIAGRAM & CIRCUIT BOARD LAYOUT NOTES 1. Important safety notice 3. Parts marked "PT" are not used in any models included Components identified by the sign have special in this service model.

  • Page 70: Interconnection Schematic Diagram

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 12.2. INTERCONNECTION SCHEMATIC DIAGRAM INTERCONNECTION SCHEMATIC DIAGRAM IMPORTANT SAFETY NOTICE: COMPONENTS IDENTIFIED BY THE SIGN HAVE SPECIAL CHARACTERISTICS IMPORTANT FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS, USE ONLY THE SPECIFIED PARTS.

  • Page 71: Power Schematic Diagrams

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 12.3. POWER SCHEMATIC DIAGRAMS POWER SCHEMATIC DIAGRAM IMPORTANT SAFETY NOTICE: CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, COMPONENTS IDENTIFIED BY THE SIGN HAVE REPLACE ONLY WITH THE SAME TYPE 6.3A 125V FUSE.

  • Page 72: Sd/Hdmi Schematic Diagram

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 12.4. SD/HDMI SCHEMATIC DIAGRAM SD/HDMI SCHEMATIC DIAGRAM VIDEO SIGNAL AUDIO SIGNAL SD/HDMI R9888 0 R9889 0 C9823 C9824 R9900 R9802 TP9814 TP9815 Q9802 2SD1819A0L VCCA (SWITCHING) VCCB R9803 R9820...

  • Page 73: Rear Jack Schematic Diagram

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 12.5. REAR JACK SCHEMATIC DIAGRAM REAR JACK SCHEMATIC DIAGRAM VIDEO SIGNAL AUDIO SIGNAL REAR JACK/FAN DRIVE CN3502 TO FRONT JACK JK3501 /OPERATION P.C.B. S-VIDEO IN1 CN6701 AV3_V D3504 D3503...

  • Page 74: Schematic Diagram

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REAR JACK SCHEMATIC DIAGRAM REAR JACK/FAN DRIVE CN3502 TO FRONT JACK /OPERATION P.C.B. CN6701 AV3_V AV3_L AV3_R C4122 C4125 TO MAIN P.C.B CN3001 CN3501 V1_V V1_S_DET V1_Y V1_C V2_V...
  • Page 75 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REAR JACK SCHEMATIC DIAGRAM VIDEO SIGNAL AUDIO SIGNAL JK3501 S-VIDEO IN1 R3501 D3504 D3503 D3506 D3505 R3502 D3502 D3501 VIDEO IN1 AUDIO IN1(L) D3508 D3507 R3503 R-SW AV1_L D3510...
  • Page 76 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REAR JACK SCHEMATIC DIAGRAM R2765 R2789 150k R2786 Q2756 OUTPUT R2784 R2787 270k HZ L OUTPUT Q2755 2SD0601A0L 2.5V (SWITCHING) IC2756 C0BBBA000022 (CMPARATOR) (TO FRONT FAN) CN2751 R2760 R2758...
  • Page 77 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 REAR JACK SCHEMATIC DIAGRAM D3530 R3512 COMPONENT D3529 AUDIO IN1(R) D3532 D3531 R2789 150k D3534 D3533 R2784 R2787 270k JK3506 C3511 C3510 COMPONENT-Y2 GR-G Q2755 D3536 D3535 R3515 2SD0601A0L...
  • Page 78 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 12.6. FRONT JACK/OPERATION / POWER SWITCH / TUNER SCHEMATIC DIAGRAM FRONT JACK/OPERATION SCHEMATIC DIAGRAM TUNER SCHEMATIC DIAGRAM VIDEO SIGNAL AUDIO SIGNAL VIDEO SIGNAL AUDIO SIGNAL TUNER TU8970 CN6701 ENGE6601KF...

  • Page 79: Printed Circuit Board

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 13 Printed Circuit Board 13.1. POWER P.C.B. POWER P.C.B. LSEP3237B CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, IMPORTANT SAFETY NOTICE: REPLACE ONLY WITH THE SAME TYPE 6.3A 125V FUSE.

  • Page 80: Sd/Hdmi P.c.b

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 13.2. SD/HDMI P.C.B. SD/HDMI P.C.B. LSEP3241A NOTE: MULTILAYER P.C.B. THIS P.C.B. IS Multi-Layer P.C.B. THIS CIRCUIT BOARD SHOWS COMPONENT LAYOUT-PATTERN FOR COMPONENT SIDE AND FOIL SIDE. LAYOUT PATETRNS ARE SINGLE PATTERN FOR EACH SIDE THAT MAKE EASY TO SIGHT THE COMPONENT LAYOUT.

  • Page 81: Rear Jack P.c.b

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 13.3. REAR JACK P.C.B. REAR JACK P.C.B. LSEP3230A REAR JACK P.C.B. LSEP3230A PT-50LCZ70/PT-56LCZ70/PT-61LCZ70/PT-50LCZ7/PT-56LCZ7 /PT-61LCZ7/PT-50LCZ70-K/PT-56LCZ70-K/PT61LCZ70-K...

  • Page 82: Front Jack/Operation P.c.b. / Tuner P.c.b. / Power Switch/Operation P.c.b

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 13.4. FRONT JACK/OPERATION P.C.B. / TUNER P.C.B. / POWER SWITCH/OPERATION P.C.B. FRONT JACK/OPERATION P.C.B. LSEP3231A TP6704 TP6703 TP6702 TP6701 TP6705 TP6706 TP6707 JK6701 R6709 R6706 R6707 R6703 R6702 R6701...

  • Page 83: Exploded Views

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 14 Exploded Views 14.1. MAIN PARTS SECTION...
  • Page 84 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7...

  • Page 85: Base Body Section

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 14.2. BASE BODY SECTION...

  • Page 86: Display Section

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 14.3. DISPLAY SECTION...
  • Page 87 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7...

  • Page 88: Screen Section

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 14.4. SCREEN SECTION...
  • Page 89 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7...

  • Page 90: Opt/Tv Unit Section

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 14.5. OPT/TV UNIT SECTION...

  • Page 91: Lamp Unit Section

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 14.6. LAMP UNIT SECTION...

  • Page 92: Packing Parts And Accessories Section

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 14.7. PACKING PARTS AND ACCESSORIES SECTION...

  • Page 93: Replacement Parts List

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 15 Replacement Parts List BEFORE REPLACING PARTS, READ THE FOLLOWING: 15.1.3. Electrical Replacement Notes 1. Unless otherwise specified; 15.1. REPLACEMENT NOTES All resistors are in Ω, K = 1,000 Ω, M = 1,000 kΩ.

  • Page 94: Mechanical Replacement Parts List

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 15.2. MECHANICAL REPLACEMENT Ref. Part No. Part Name & Description Remarks PARTS LIST LFS4000PA1EB LAMP UNIT PSEC LSYK2135 ESCUTCHEON SUB UNIT ( A,G ) LSYK2136 ESCUTCHEON SUB UNIT ( B,H )

  • Page 95: Electrical Replacement Parts List

    PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 15.3. ELECTRICAL REPLACEMENT Ref. Part No. Part Name & Description Remarks PARTS LIST LSMZ0426 BARRIER LSJH0096 REAR JACK HOLDER LSXK0303 RF AMP POWER SUPPLY P.C.B.NR Definition of Parts supplier: PSEC 1.
  • Page 96 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 DIODES Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D9806 EZAEG2A50AX OTHER FILTERS D6802 B3AAA0000975 LIGHT EMITTING DIODE D9807 EZAEG2A50AX OTHER FILTERS...
  • Page 97 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 CAPACITORS Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D808 B0HAJL000001 DIODE SI C9801 F1H1E104A030 C CHIP 25V 0.1UF D809 B0EAKP000012...
  • Page 98 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 15.3.5. REAR JACK P.C.B. Ref. Part No. Part Name & Description Remarks C1004 ECJ1VB1H104K C CHIP 50V 0.1UF INTEGRATED CIRCUITS C1005 ECJ1VC1H101J C CHIP 50V 100PF Ref. Part No.
  • Page 99 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R2784 ERJ3GEYJ183V MGF CHIP 1/16W 18K C2759 F1H1E104A030 C CHIP 25V 0.1UF R2785...
  • Page 100 PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7 Ref. Part No. Part Name & Description Remarks R8973 ERJ3GEY0R00V MGF CHIP 1/16W 0 R8974 ERJ3GEY0R00V MGF CHIP 1/16W 0 W8972 ERJ6GEY0R00V MGF CHIP 1/10W 0 W8973 ERJ6GEY0R00V MGF CHIP 1/10W 0...

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