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Panasonic LCD-201803 Technical Manual Download Page 21

P

(Backlight)

REG

16V

STB5V

16V

LED

Drive

IC

Anode

Cathode

PWM

PFC

IC

Power

IC

Power

IC

HO

LO

VLED

< P >

A

21

BL-ON

Power Board Structure -1 ( P Board only )

This block diagram is 2ch drive for backlight.
The number of channel is different by the models (LCD panels).
The VLED voltage is also different by the LCD panels.

1 ch

2 ch

( Models are refer to P.10 )

Summary of Contents for LCD-201803

Page 1: ...Panasonic Corporation 2018 Unauthorized copying and distribution is a violation of law c Model No LCD 201803 Order No ITD1803902GE 1 Circuit Operation and Troubleshoot 2018 LCD TV Ver 1 0 ...

Page 2: ...Revision History Version Issued Revised date Revised content Ver 1 0 29th Mar 2018 First version 2 ...

Page 3: ...l Processing 2 1 Picture signal flow 2 2 Troubleshoot of Picture Problem 3 Power Supply 3 1 Power Board Structure 3 2 Stand by Start up Operation 3 3 SOS Protection Circuit and Troubleshoot of Power Problem 4 Rear Cover Disassemble and Assemble ...

Page 4: ...1 Board Layout 4 ...

Page 5: ...d Layout 1 5 The presence of GK board is depend on the model and region A K P A K LDP G K 49 43 32 24FS F4 40FS F4 Europe and Oceania 40FS F4 Latin and Asia 55 49 43 40FX6 FX7 A K P 50FS 65FX6 75FX7 LDP G K ...

Page 6: ...Main Board P Board Power supply Backlight Drive Power key Control key K Board Remote Receiver Power LED A02 A12 A10 P3 P A AC input K10 Speaker Speaker K A15 6 Board Layout 2 32F400 A P T CON Not repairable One of the panel module ...

Page 7: ... Not repairable One of the panel module A16 P2 7 Board Layout 3 55FX700 A P P3 GK Bluetooth Module Board Name Function A Board Main Board P Board Power supply Backlight Drive Board Name Function K Board Remote Receiver Power LED GK Board Power key Control key JK8705 ...

Page 8: ...Board Power supply Backlight Drive Power key Control key K Board Remote Receiver LED A02 A10 P2 A DC input Connect the AC adapter K10 Speaker Speaker K A11 8 Board Layout 4 40F400 A LDP GK LDP1 T CON Not repairable One of the panel module LDP ...

Page 9: ...module LDP5 9 Board Layout 5 LDP LDP3 LDP2 Board Name Function A Board Main Board P Board Power supply for Signal Process Board Name Function LDP Board Power supply for Backlight Drive K Board Remote Receiver Power LED 75FX750 A P LDP LDP4 Bluetooth Module Not repairable One of the panel module A15 JK8705 ...

Page 10: ...P A P 40inch A P Oceania A P Europe Oceania A P A P A LDP DC adaptor Asia Latin A LDP DC adaptor Asia Latin 43inch A P A P A P 49inch A P A P A P 50inch A P LDP 55inch A P A P 65inch A P LDP 75inch A P LDP 10 Except K GK boards Board Structure ...

Page 11: ...11 2 Signal Processing 2 1 Signal Flow ...

Page 12: ...terminal OPT_out IC8000 MT5561 Resize IP conv OSD HDMI1 2 IC68 De Modulation The input terminals are different by the models or countries LVDS Data to LCD Panel 12 Video Audio Signal Process 1 F4 series USB1 IC4900 Audio AMP ...

Page 13: ...T5581P Resize IP conv OSD HDMI1 2 3 Bluetooth TU690 TUNER Headphone IC68 De Modulation CI slot only Europe The input terminals are different by the models or countries LVDS Data to LCD Panel 13 Video Audio Signal Process 2 FS series USB1 2 LAN IC3400 or 4900 Audio AMP ...

Page 14: ...NER USB1 USB3 The input terminals are different by the models or countries 14 Video Audio Signal Process 3 LAN CI slot only Europe USB2 IC8701 USB HUB IC68 De Modulation HDMI1 2 3 HDMI4 FX6 FX700 740 series to LCD Panel V by One format IC3400 Audio AMP Headphone Only FX700 Only FX700 Only FX700 ...

Page 15: ... USB2 Headphone USB3 3 0 The input terminals are different by the models or countries 15 Video Audio Signal Process 4 LAN CI slot only Europe USB1 IC8705 USB HUB IC68 De Modulation HDMI1 2 3 4 to LCD Panel IC9000 MFC19 Frame Rate Color space Convert V by One format FX750 780 series IC3400 Audio AMP ...

Page 16: ...16 2 2 Troubleshoot of Picture Problem ...

Page 17: ...mote control 3 times within 2 seconds How to exit Switch off the TV unit The test pattern is created by the circuit in LCD Panel Module T CON board Troubleshoot for Picture Problem 17 Some patterns are automatically changed The patterns are depend on the LCD panel A IC8000 Peaks MTK Resize IP conv LCD Panel LCD Panel Module T CON Test Pattern Check the Panel Test Mode Test pattern OK Replace LCD P...

Page 18: ... Self Test Yes No 1 During this indication Self Check of Service Mode is working at the background 2 If NG indication is shown A board defective 3 If All OK it shifts to picture and sound test OK 1 Antenna level low 2 Connection mistake 3 Input devices NG 4 Input select mistake TV unit defective A board Panel or Speaker F400 410 series do not support Troubleshoot for Picture Sound Problem 18 A IC8...

Page 19: ...t time after shipping 1 Self check 0 never self check 1 factory Self check by pressing MENU 2 indication Self check by pressing Blue or OK 0000 Fixed 17d010ff Panel ID Status6 Main SOC EEPROM version STM EEPROM version Status7 STM ROMCOR version AJAX CE version Status8 00014 Starting Count of Panel Maintenance 1 for OLED 00014 Completed Count of Panel Maintenance 1 00001 Starting Count of Panel Ma...

Page 20: ...20 3 Power Supply 3 1 Power Board Structure ...

Page 21: ...ower IC Power IC HO LO VLED P A 21 BL ON Power Board Structure 1 P Board only This block diagram is 2ch drive for backlight The number of channel is different by the models LCD panels The VLED voltage is also different by the LCD panels 1 ch 2 ch Models are refer to P 10 ...

Page 22: ...cklight DCDC STB5V 16V TV_SUB ON Cathode PWM VLED LDP A 22 BL ON Power Board Structure 2 LDP Board only AC Adaptor DCDC 19 5V DC19 5V AC DCDC LED Drive IC only TH TC 40F4 40FS except Europe Oceania 4 ch Anode ...

Page 23: ...P LDP Backlight DCDC 16V STB5V 16V PWM PFC IC Power IC HO LO P LDP A 23 Power Board Structure 3 P LDP Boards BL ON only 50FS500 Cathode VLED DCDC LED Drive IC 4 ch Anode ...

Page 24: ... 24 Power Board Structure 4 P LDP Boards BL ON only 65FX6 75FX7 DCDC LED Drive IC VLED1Anode Cathode 1 ch 2 ch 1 ch 2 ch This LDP block diagram is 2ch drive for backlight of 65inch model 4ch drive is for 75 inch models The number of channel and VLED voltage are different by the LCD panels ...

Page 25: ...25 3 2 Stand by Start up Operation The explanation is for the case of Power Board Structure 1 P board only ex 55FX600 but LDP P LDP P PB cases are basically same start up operation ...

Page 26: ...odule A T CON board LCD Panel STB3 3V F15V PNL12V A16 44 51 12V 3 3V 5V 1 5V 1 0V 3 3V PNL12V 9 10 14 The DC level is different by the LCD panel 26 A02 Voltage Distribution A P Boards Ex 55FX600 series Each models are different pin allocation but operation is same VLED1 2 110 140V 3 7 1 5 16V STB5V 7 7 Up convert 1 4 A P ...

Page 27: ... the power supply receives the TV_SUB_ON signal it outputs 2 different voltages 16V to the A board on pins 1 2 3 and 4 of connector P2 64V to the LED backlight drive part After A board is ready to display it outputs Backlight_on command to P board P board output 110 140V to the backlight of LCD panel on pins 3 and 7 of connecter P3 10 POWER_ON KEY3 6 light 2 64V 27 Start up Operation 1 1 5 3 7 Eac...

Page 28: ...O LO FB 64V Q7402 04 7 P2 D7106 Rectifier T7202 D7217 C7213 15 VCC Q7403 05 D7406 07 C7424 Through OFF OFF from AC plug in to P board 1 PFC IC7201 7 1 4 13 TNPA6376 28 OFF PFC OFF AC100V 140V AC240V 330V Start up Operation 2 D7403 C7422 PGS 14 LED Drive IC7800 P3 Anode2 Cathode2 Tr Anode1 Cathode1 Tr 1 5 3 7 Ex 55FX600 series SRV 5V A P ...

Page 29: ...01 starts supplyinng of switching pulses for Q7301 Q7302 Due to this current starts to lead through winding of T7301 which starts to generate output voltages One of these voltages VCC is used for power supplying of the IC 7301 to its pin 10 When the power supply starts up the 16V is providing by D7406 07 C7424 This voltage leads to IC7405 which is 5 volts DCDC converter This voltage STB5V is provi...

Page 30: ...wer SW Standby It can receive Power SW Remote Viera Link and so on North America Power LED OFF Except North America Power LED OFF Power LED RED Power SW on 2 from to A board 1 POWER Switch 10 10 Automatically 30 Start up Operation 4 IC8000 SoC Signal Processing Each models are different pin allocation but operation is same Ex 55FX600 series A P ...

Page 31: ...ca Power LED OFF Except North America Power LED OFF Power LED RED Power SW on 2 from to A board 1 POWER Switch 10 10 Automatically 31 Reference Start up Operation 4 1 05V IC8102 To WiFi adaptor 1 5V for WiFi JK8705 8605 LAN 1 JK8600 Enable Enable IC8706 IC8000 SoC Signal Processing The power line for LAN WiFi is supplied from Standby power If the setting of Power on by Apps etc function is enable ...

Page 32: ...IC8000 lights on the RED LED and is ready to power on the TV by receiving the Power switch on Remote on Viera Link and so on This is a standby state 1 Only North America model Power switch on is no need automatically this procedure is operated after the TV is plugged in But the RED LED does not light When the power on command from the power switch the remote control and so on is provided to IC8000...

Page 33: ...D7106 Rectifier PFC IC7201 Q7201 T7202 D7217 C7213 15 8 7 VCC 1 4 Q7403 05 BL ON L7815 33 Anode2 Cathode2 Vcc PFC ON AC100V 380V AC240V 380V SRV 16V SRV VLED SRV VLED2 SRV 5V The DC level is different by the LCD panel Q7804 Tr 3 STB PWM 9 PGS D7406 07 C7424 D7403 C7422 13 14 L7816 Anode1 SRV VLED1 Q7801 Cathode1 Tr 1 5 3 7 Start up Operation 6 from to P LD board 2 3 LED Drive IC7800 P Ex 55FX600 s...

Page 34: ...the IC 7301 changes the switching frequency from standby state to working state because of providing high power current Output voltages from transformer T7301 start rising up until the moment when IC7401 started to operate This IC measures the 16V line output in the secondary side The output of this IC is provided by PC7301 to pin 4 of IC7301 IC7301 adjust the switching frequency by this feedback ...

Page 35: ...1 DCDCEN SUB5V PFC T7202 IC7201 DC DC IC7301 F15V IC5000 ANALOG ASIC IC8000 SoC 16V DC DC IC7503 STB5V STB3 3V 35 The DC level is different by the LCD panel 3 7 P3 IC5230 IC4506 IC5200 7 IC7800 DCDC LED Drive 64V Output VLED1 2 110 140V TNPA6376 A board SUB voltage 3 Start up Operation 8 16V 64V SRV 16V Ex 55FX600 series 9 1 2 3 4 7 1 8V IC5240 eMMC1 8V STB1 05V A P ...

Page 36: ... board to generate the SUB Voltages used for signal processing operation SUB1 0V 1 8V 3 3V 5V and HDMI3 3V TU1 8V Each voltage regulators start up by high state of DCDCEN signal which is pull up to F15V So F15V is provided to A board each SUB voltage regulator ICs start output A board SUB voltage 3 36 Start up Operation 9 A P ...

Page 37: ...Module PNL12V F15V SUB5V T CON PFC T7202 IC7201 DC DC IC7301 Back Light F15V IC5000 ANALOG ASIC IC8000 SoC 16V DC DC IC7405 STB5V BL_SOS IC5260 STB3 3V 37 The DC level is different by the LCD panel 1 5 P3 PWM IC5420 IC8001 IC5400 7 15 IC7800 DCDC LED Drive and A board PNL voltage 4 5 Start up Operation 10 14 13 64V Output 16V TNPA6376 12V 1 2 3 4 VLED1 2 110 140V STB1 05V 1 05V 9 7 15 14 13 1 2 3 ...

Page 38: ...ommand to the P board The BL_ON command turns on the IC7800 for LED backlight drive Then the 64V rise up over 110V and output to the backlight on the LCD panel The backlight starts lighting by PWM signals and LCD panel displays the pictures If the backlight drive circuit does not work normally the BL_SOS signal is informed to the IC8000 At that time IC8000 stops outputting the TV_SUB_ON signal and...

Page 39: ...106 Rectifier PFC IC7201 Q7201 T7202 D7217 C7213 15 8 7 VCC 1 4 Q7403 05 BL ON L7815 39 Anode2 Vcc PFC ON AC100V 380V AC240V 380V SRV 16V SRV VLED SRV VLED2 SRV 5V The DC level is different by the LCD panel Q7804 3 STB PWM 9 PGS D7406 07 C7424 D7403 C7422 13 14 L7816 Anode1 SRV VLED1 Q7801 1 5 P Q7414 Q7416 17 Q7315 LED Drive IC7800 Cathode2 Tr Cathode1 Tr 3 7 Start up Operation 12 P board backlig...

Page 40: ...x TNP4G630 LDP2 6 7 9 15 16 12 LCD Module A T CON board LCD Panel STB3 3V F16V PNL12V A19 1 4 12V 3 3V 5V 1 5V 1 1V 3 3V PNL12V 2 4 10 The DC level is different by the LCD panel 40 A02 Reference Voltage Distribution A P LDP Boards only TH 50FS500 series VLED 16V STB5V 7 1 3 5 11 P2 1 4 6 9 LDP2 3 Up convert A P LDP 9 ...

Page 41: ... 1 19 20 13 LCD Module A T CON board LCD Panel STB3 3V F16V PNL12V A16 44 51 12V 3 3V 5V 1 5V 1 1V 3 3V PNL12V 9 12 14 The DC level is different by the LCD panel 41 A02 Reference Voltage Distribution A P LDP Boards only 65FX6 75FX7 series Each models are different pin allocation but operation is same VLED1 2 16V STB5V 7 1 4 7 P2 1 3 1 3 LDP2 3 Up convert A P LDP ...

Page 42: ...Red Power LED off AC Plug in STB5V form P to A 16V from P to A PNL12V from A to Panel T CON SUB_ON from A to P Power LED Panel_Vcc_ON from A to Panel TCON VLED from P to Panel Backlight BL_ON from A to P LDP Power on Standby Power on Standby North America Power LED Green RED Power LED Red OFF Power Off no exist 5V 16V 12V Ex 32V VLED PANEL_VCC_ON signal PNL12V output 32V up to VLED F4 series The D...

Page 43: ...n STB5V form P to A 16V from P to A PNL12V from A to Panel T CON SUB_ON from A to P Power LED Panel_Vcc_ON from A to Panel TCON VLED from P to Panel Backlight BL_ON EVDD_ON from A to P LDP PB Standby Power on Standby Power on Power on North America Power LED Green RED Power LED Red OFF Power Off no exist Also 16V is necessary before Power LED Standby Power on 5V 16V 12V ex 64V VLED ex 120V 64V up ...

Page 44: ...44 3 3 SOS Protection Circuit and Troubleshoot of Power Problem ...

Page 45: ...roblem Error SUB5V 1 5V 1 1V voltage quick 3 P A Memory eMMC read problem quick 2 4 A No voltage SUB3 3V after wake up once 7 7 7 7 7 A Audio amplifier SOUND_SOS 9 9 9 9 9 A speaker FRC_SOS IC9000 10 A Emergency SOS 13 13 13 13 13 A 45 When an abnormality occurs in the unit the SOS Detect circuit is triggered and the TV shuts down Shut down means that the unit turns off the TV_SUB_ON signal The po...

Page 46: ...ink 1 Blink 7 Blink detect OFF N OFF Back Light 46 The DC level is different by the LCD panel IC5260 IC5420 IC8001 IC5400 12V P2 Q7403 05 16V Output Transformer T7301 3 7 PFC T7202 IC7201 DC DC IC7301 16V 1 5 P3 16V TNPA6376 BL_SOS BL_ON 9 14 LCD_TV_SUB_ON 15 Tr Ex 55FX600 series 44 51 VLED1 2 110 140V 64V Q7402 04 64V Output 1 2 3 4 9 14 15 1 2 3 4 IC7800 LED DC DC Drive Protection Circuit Protec...

Page 47: ...7403 C7422 D7406 07 C7424 13 14 15 9 LED blinks Detail error Board may defect 1 BL_SOS LED driver Panel P If the IC7800 detects 1 abnormal current of backlight LEDs Backlight LED broken or Low No VLED voltage 2 abnormal DC DC power supply of IC7800 does not rise up the VLED voltage or the IC7800 does not work No Vcc or No BL_ON PWM signal or defect itself the IC7800 output BL_SOS signal to IC8000 ...

Page 48: ...0V P board Connect P3 connector Power on Check if the voltage of SRV VLED1 2 pin1 5 of P3 before LED 1 blink Both OK Panel Module Panel Module Shorted OK Short check between SRV VLED of P board and GND P board Ex 55FX600 series Troubleshooting for LED Blinking 1 time blink for A P type 2 A P SRV VLED SRV VLED1 SRV VLED2 P board TNAP6376 P board TNAP6376 ...

Page 49: ...9 Blink 1 Blink 7 Blink detect OFF N OFF Back Light The DC level is different by the LCD panel IC5260 IC5230 IC4506 IC5200 12V P2 Q7403 05 16V Output Transformer T7301 PFC T7202 IC7201 DC DC IC7301 16V IC7800 LED DC DC Drive Ex TNPA6374 9 LCD_TV_SUB_ON Ex 65FX600 series 44 51 VLED1 2 64V Q7402 04 64V Output 1 2 3 4 9 14 15 1 2 3 4 LDP3 Ex TNPA6375 LDP5 LDP6 1 3 BL_ON 3 BL_SOS Tr 4 16V 13 1 5 6 19 ...

Page 50: ...y defect 1 BL_SOS LED driver Panel LDP P If the IC7800 detects 1 abnormal current of backlight LEDs Backlight LED broken or Low No VLED voltage 2 abnormal DC DC power supply of IC7800 does not rise up the VLED voltage or the IC7800 does not work No Vcc or No BL_ON PWM signal or defect itself the IC7800 output BL_SOS signal to IC800 LED blink 1 time LED Drive IC7800 Q7802 Q7803 BL ON PWM Ex 65FX600...

Page 51: ...ltage of SRV VLED1 VLED2 pin 1 of LDP5 LDP6 before LED 1 blink ALL OK NG OK 64V P board Panel Module LDP board Shorted OK Short check between SRV VLED1 VLED2 and GND Panel Module Power on Check if the voltage of SRV 64V pin 19 20 of P2 before LED 1 blink VLED The DC level is different by the LCD panel Ex 65FX600 series Troubleshooting for LED Blinking 1 time blink for A P LDP type 2 A P LDP ...

Page 52: ...wer on Check if voltage P15V at pin 1 3 5 of A02 connector before LED blinks No Yes 15V A board P board Remove P2 connector Check if short circuit at pin 1 3 5 of A02 connector No Yes Shorted A board P P2 1 2 3 16V Q7403 16V A IC8000 5V IC5420 3 3V IC5400 1 5V 1 2V P15V SUB1 5V SUB1 1V DCDCEN 12V IC4900 AMP SUB5V IC5500 IC8103 IC8101 A02 52 Troubleshooting for LED Blinking Quick 1 3 time blink SRV...

Page 53: ...lifier work abnormally may due to short circuit or overload the SOUND_SOS signal will go low level and be detected by IC8001 LED blinks 9 times Remove A12 connecter Power on Does LED blinks again L R speaker wire of speaker A board A A02 IC8000 IC3800 01 AMP F15V SOUND_SOS 9 Blink N SOS A12 16V From P BOARD 53 Troubleshooting for LED Blinking 9 time blink Ex 55FX600 1 4 ...

Page 54: ... IC9000 13 Emergency SOS A eMMC Nand Flash IN THESE CASES A BOARD DEFECTS 54 Troubleshooting for LED Blinking 2 4 7 10 13 16 time blink Quick 2 4 blinks is problem about memory access IC8900 or IC8000 7 blinks is problem about the power line of SUB3 3V 10 blinks is problem about initialization of FRC IC IC9000 13 blinks is problem about IC8000 and software issue mostly case the memory eMMC NAND Fl...

Page 55: ...ce LCD Panel T CON part Is the power LED situation changed after pushing the button for entering Test Mode If entering the test mode the Power LED will Blink except TC model or OFF TC model Patterns are displayed No Picture The voltage of VLED is different by the LCD panel 55 Troubleshooting for No Picture and No OSD Power LED is lit No blinking Refer to the block diagram of Troubleshooting for LE...

Page 56: ...board Check if the output of STB5V Disconnect A02 connecter Short check of STB5V line in A board No Shorted Shorted Replace P board Replace A board F4 series OK 56 Disconnect A10 connecter Power on check few times because we can t check the power LED Replace K board Power on NG ...

Page 57: ...cter Short check the SRV 16V In A board Shorted No shorted Replace A board Disconnect LDP3 connecter Short check the SRV 16V in P board Shorted Replace P board Replace LDP board No shorted FX FS series OK P A 16V P2 A02 LDP3 57 P LDP A STB5V 16V P2 A02 Both of STB5V and 16V are necessary before lighting power LED refer to page 43 of Simple Power On Sequence FX FS Series Replace P LDP board A P LDP...

Page 58: ...4 Rear Cover Disassemble and Assemble 58 ...

Page 59: ...s model 1 Put the rear cover shift from top edge adjust the hook of rear cover to the hole of the panel 2 Slide the rear cover to the top end of the panel at right side and left side 3 Push the circumference of rear cover and fit it Check that there is no floating and fix all the screws 3 Slide the rear cover downward direction then remove the rear cover Slide downward There are some screws on the...

Page 60: ...ge of the table Example4 Insert objects that become step between unit and the table How to remove the bottom screws Shift Table Table UP 60 Rear Cover Disassemble Assemble 2 The product pictures and drawing is for explanation It is not 2018 model M3x8 Head Hexagon 8mm Bottom Screw Type under 50mm ...

Page 61: ...of rear cover towards yourself The left side is hard a little because of hook next of the control buttons 3 Lift the rear cover up and remove it It is hard a little Refer to right structure drawing 1 Fit the top side of rear cover 2 Push the circumference of rear cover and right side of control button and fit it Check that there is no floating all circumference and fix all the screws Side View Pan...

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