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Panasonic TH-50LRU70, Service Ma

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Panasonic TH-50LRU70 Service Ma Download Page 23

2

3

9

.2. Block (1/2) Diagram 

COLD

HOT

COLD

BL_ON

BL_PWM

BL_SOS

SUB_ON

BL_ON

BL_ON

BL_SOS

BL_SOS

BL_PWM

BL_PWM

POWER_ON

KEY

POWER_ON

POWER_ON

KEY

KEY

STB5.3V

SUB3.3V

P16V

DCDCIN

PNL12V

P16V

SUB5V

STB5.3V

P16V

F7101

D7408,9

D7401,2

SW2857

BACK LIGHT

PANEL12V

4

4

11

PNL12V

DCDCEN

40

5

5

PANEL

CONTROL

IC5421

7

11

PNL12V

1

PANEL_VCC_ON2

+12V

+3.3V

12

6

3

SUB5V

A

IC5400

MAIN

IC5420

A11

SUB3.3V

9

A02

9

+5V

1

7

LVDS_DATA

LVDS_DATA

LCD PANEL

8

2

LVDS_DATA

+16V

T7201,

Q7201

AC

DETECT

Q7402,
Q7405

Q7301,

Q7302

PC7302

1

Q7403

2

T7301

D7106

CF7104

STB5V

LF7103

LF7104

LF7105

PFC

PHOTO

COUPLER

PHOTO

COUPLER

AC CORD

PC7301

+16V

LINE

FILTER

9

JK7101

IC7503

PC7303

IC7401

3

P2

7

2

RECTIFIER

+5V

PHOTO

COUPLER

+16V

SUB_ON

P

1

5VS

LLC

CONVERTER

ERROR

DETECT

POWER

13

+32V

3

BL_PWM

11

14

BL_SOS

BL_ON

2

4

+32V

P4

9

8

KEY,Power SW

2

3

P5

GK

SW2851-2855

2

POWER SW

CONTROL PANEL KEY

GK4

12

8

POWER ON

10

10

KEY

IC7301

IC7201

HOT

3

6

+16V

TV_DATA_IN

TV_DATA_OUT

TV_CLK

LN_REG_ON

TA_REG_ON

REMOTE

JK6100

1

2

3

4

5

6

TA5V

STB5.3V

L6123

TAM5V

STBG12V

IC6053

IC6111

RXD

IC6054

X6101

JK6750

X6100

TV_DATA_OUT

FSK SW

IC6106

BUFFER

RTB

CHANGE

IC6108

ANTENNA/

CABLE IN

IC6110

SELECT

12V

DATA/

MTI

TV_CLK

X6105

IC6103

TV_DATA_IN

FSK

RECEIVER

+3.3V

VCC

BUFFER

EN

TA5V

X6103

IC6107

IC6105

MPU

TXD

VCC

IC6104

Q6102

TV_IR

22.25M

BUFFER

FILTER

22.75M

BAND 
PASS

FILTER

TA_3.3V

P16V

STB5V

+5V

IC5200

HDMI5VA

TA_M5V

2

3

1

P16V

STB5V

HDMI5VA

TA_M5V

8

PANEL_TEST_ON

PANEL_TEST_ON

Summary of Contents for TH-50LRU70

Page 1: ... Panasonic Corporation 2014 Unauthorized copying and distribution is a violation of law ORDER NO MTNC140637CE Hospitality LCD HDTV Model No TH 50LRU70 LA50 Chassis ...

Page 2: ... Data Copy by USB Memory 10 6 Troubleshooting Guide 13 6 1 Check of the IIC bus lines 13 6 2 Power LED Blinking timing chart 14 6 3 LCD Panel test mode 14 7 Disassembly and Assembly Instructions 15 7 1 Disassembly Flow Chart for the Unit 15 7 2 Disassembly Procedure for the Unit 15 8 Measurements and Adjustments 21 8 1 Voltage chart of P board 21 8 2 Voltage chart of A board 21 9 Block Diagram 22 ...

Page 3: ...units Replace the entire wiring unit instead 6 When conducting repairs and servicing do not twist the Fasten connectors but plug them straight in or unplug them straight out 1 2 Touch Current Check 1 Plug the AC cord directly into the AC outlet Do not use an isolation transformer for this check 2 Connect a measuring network for touch currents between each exposed metallic part on the set and a goo...

Page 4: ... of the assembly 3 Use only a grounded tip soldering iron to solder or unsolder ES devices 4 Use only an anti static solder removal device Some solder removal devices not classified as anti static ESD protected can generate electrical charge sufficient to damage ES devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ES devices 6 Do not remove a...

Page 5: ...ee solder has a higher melting point than standard solder Typically the melting point is 50 70 F 30 40 C higher Please use a high temperature soldering iron and set it to 700 20 F 370 10 C Pb free solder will tend to splash when heated too high about 1100 F or 600 C If you must use Pb solder please completely remove all of the Pb free solder on the pins or solder area before applying Pb solder If ...

Page 6: ...6 3 Service Navigation 3 1 PCB Layout Board Name Function A Board Main K Board IR LED CATS P Board Power Supply GK Board Power switch Control Button ...

Page 7: ...N V Chip Vesa compatible Integrated Pro Idiom Operating Conditions Temperature 32 F 95 F 0 C 35 C Humidity 20 80 RH non condensing Connection Terminals VIDEO IN VIDEO RCA PIN Type x 1 1 0 V p p 75Ω AUDIO L R RCA PIN Type x 2 0 5 V rms COMPONENT IN Y RCA PIN Type x 1 1 0 V p p including synchronization Pb RCA PIN Type x 1 0 35 V p p Pr RCA PIN Type x 1 0 35 V p p AUDIO L R RCA PIN Type x 2 0 5 V rm...

Page 8: ...ton Main items Selection in forward direction 2 button Main items Selection in reverse direction 3 button Sub items Selection in forward direction 4 button Sub items Selection in reverse direction VOL button Value of sub items change in forward direction in reverse direction 5 1 4 Contents of adjustment mode Value is shown as a hexadecimal number Preset value differs depending on models After ente...

Page 9: ...rrence after shipment will be cleared by Self check indication and forced to factory shipment setting 5 2 3 POWER ON TIME COUNT Note To display TIME COUNT menu highlight position then press MUTE for 3 sec Time Cumulative power on time indicated hour minute by decimal Count Number of ON times by decimal Note This indication will not be cleared by either of the self checks or any other command 5 2 4...

Page 10: ...then copy to other TVs 5 3 2 Preparation Make pwd file as startup file for a or b in a empty USB Memory 1 Insert a empty USB Memory to your PC 2 Right click a blank area in a USB Memory window point to New and then click text document A new file is created by default New Text Document txt 3 Right click the new text document that you just created and select rename and then change the name and exten...

Page 11: ...llowing password for a or b by using remote control a For Board replacement 2770 b For Hotel 4850 Data will be copied from TV set to USB Memory It takes around 2 to 6 minutes maximum for copying 4 After the completion of copying to USB Memory remove USB Memory from TV set 5 Turn off the TV set Note Following new folder will be created in USB Memory for data from TV set a For Board replacement user...

Page 12: ...ent 2771 b For Hotel 4851 Data will be copied from USB Memory to TV set 4 After the completion of copying to USB Memory remove USB Memory from TV set a For Board replacement Data will be deleted after copying Limited one copy b For Hotel Data will not be deleted and can be used for other TVs 5 Turn off the TV set Note 1 Depending on the failure of boards function of Data copy for board replacement...

Page 13: ...s recorded in USB HDD will not be viewed See USB HDD Recording Produce TV reception screen and while pressing VOLUME button on the main unit press MENU button on the remote control for more than 3 seconds 6 1 2 Screen display 6 1 3 Check Point Confirm the following parts if NG was displayed 6 1 4 Exit Disconnect the AC cord from wall outlet or press the POWER button on the main unit for 3 seconds ...

Page 14: ...tton on the main unit or the POWER button on the remote control How to confirm If the abnormal picture is displayed go into LCD Panel test mode to display the several test patterns And then judge by the following method Still abnormal picture is displayed The cause must be in LCD Panel Normal picture is displayed The cause must be in A board Remarks The test pattern is created by the circuit in LC...

Page 15: ...power was off for discharge from electrolysis capacitors 7 2 1 Pedestal 1 Lay down the unit so that the rear cover faces upward 2 Remove the 4 screws 3 Remove the pedestal NOTE One security screw THE2AC004J may be attached among the four screws to the pedestal assembly Use star screwdriver size T 20 for disassembly and assembly 7 2 2 Back Cover 1 Remove the 9 screws A 2 Remove the 14 screws B 3 Re...

Page 16: ...arrier 7 2 4 A Board 1 Remove the 4 screws 2 Disconnect the connectors A02 A10 A11 and A12 3 Remove the Side AV Bracket 4 Remove the A Board 5 Remove the CH Mount Boss and Ground Spring 7 2 5 Vesa Metals 1 Remove the 4 screws 2 Remove the 4 Vesa Metals 7 2 6 Bottom Metal 1 Remove the 4 screws 2 Remove the 2 Bottom Metals ...

Page 17: ...d and the Key Button Bracket 7 2 8 Speakers 1 Remove the 2 speakers 2 Remove the 4 screws 3 Remove the 4 SP Brackets 7 2 9 K Board LCD PANEL 1 Remove the LED Panel Assy from the Cabinet 2 Disconnect the connector K10 3 Remove the LED panel the K Board and the LED Panel Case 4 Remove the LCD PANEL ...

Page 18: ...18 7 2 10 Felt Sponge and so on ...

Page 19: ...19 ...

Page 20: ...20 ...

Page 21: ...int Spec 24V TP7407 32V 1 6V 16V TP7410 15 7V 0 6V 5VS TP7501 5 5V 0 2V PFC TP7201 or TP7202 390V 15V HOT Power Supply Name Test point Spec STB5V TP5200 5V 0 1V PNL12V TP4117 12 1V 0 8V SUB3 3V TP5400 3 32V 0 165V SUB1 1V TP8101 1 14V 0 07V SUB1 5V TP8100 1 52V 0 05V SUB5V TP5420 5 0V 0 25V HDMI3 3V TP5520 3 3V 0 16V ...

Page 22: ...ANEL A SOUND_SOS A02 TUNER KEY SUB1 5V DCDCIN COMPONENT VIDEO L R P16V LED BACK LIGHT SUB1 1V SUB_ON DCDC MAIN SUB1 5V SOUND_SOS C A T S SENSOR SUB1 1V SUB1 1V LVDS Tx STB3 3V POWER ON L STB5 3V P16V CONTROL PANEL KEY POWER SW GK GK4 SWITCH SUB9V TU_1 8V P16V L R OUT AV RS232C TMDS DATA 16V HDMI3 R G B H V PC L R PC AUDIO OUT DIGITAL AUDIO AUDIO OUT RXD TXD R G B H V L R PC INPUT LIVE P 16V Power ...

Page 23: ...E FILTER 9 JK7101 IC7503 PC7303 IC7401 3 P2 7 2 RECTIFIER 5V PHOTO COUPLER 16V SUB_ON P 1 5VS LLC CONVERTER ERROR DETECT POWER 13 32V 3 BL_PWM 11 14 BL_SOS BL_ON 2 4 32V P4 9 8 KEY Power SW 2 3 P5 GK SW2851 2855 2 POWER SW CONTROL PANEL KEY GK4 12 8 POWER ON 10 10 KEY IC7301 IC7201 HOT 3 6 16V TV_DATA_IN TV_DATA_OUT TV_CLK LN_REG_ON TA_REG_ON REMOTE JK6100 1 2 3 4 5 6 TA5V STB5 3V L6123 TAM5V STBG...

Page 24: ...C IIC3 SUB1 5V IC8101 FE_XRST P15V 1 1V HDMI3 3V IIC_2 AUDIO AMP 6 HDMI_5V_DET1 R PWM_A_OUT DDC1 IC8100 IC8900 HDMI_CEC 5V DCDCEN DCDCEN BL_SOS 1 TMDS DATA CLOCK 4 IIC_2 PWM_A_IN L XRSTSTM Rx0 SDIN DCDC_CTL P_PWMA IC5500 REMOTE RECEIVER RM2800 SUB1 1V NAND FLASH CN4502 IC5000 OVP_DET DIGITAL AUDIO OUT DDC0 LATCH POWER LED REMOTE RECEIVER C A T S SENSOR IEC_OUT SUB3 3V ARC_OUT 5V POWER_ON ANALOG AS...

Page 25: ...Diagram 10 1 Caution statement Caution Please confirm that all flexible cables are assembled correctly Also make sure that they are locked in the connectors Verify by giving the flexible cables a very slight pull 10 2 Wiring 1 ...

Page 26: ...26 10 3 Wiring 2 ...

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