Panasonic LCD-2016 Technical Manual
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Panasonic LCD-2016 Technical Manual

Circuit operation and troubleshoot
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LCD-2016
Model No.
2016 - LCD TV
Circuit Operation and Troubleshoot
c
Panasonic Corporation 2016
Unauthorized copying and distribution is
a violation of law.
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Summary of Contents for Panasonic LCD-2016

  • Page 1 LCD-2016 Model No. 2016 - LCD TV Circuit Operation and Troubleshoot Panasonic Corporation 2016 Unauthorized copying and distribution is a violation of law.
  • Page 2 INDEX 1.Board Layout 2.Video Signal Processing 3.Power Supply 3-1. Power Board Structure 3-2. Stand by / Start up Operation 4.SOS Protection Circuit and Troubleshooting (except 1 time blink) 5.Difference of LED Drive Circuit (Troubleshooting for 1 time blink)
  • Page 3 1. Board Layout...
  • Page 4 Board Layout -1 ( DX*** series ) T*-65DX***, TH/TC-55DX*** T*-**DX900 T*-40DX*** T*-49/50/58DX***, TX-55DX*** GK board : depend on the model BT : depend on the model and region...
  • Page 5 Board Layout -2 ( D/DS*** series ) T*-49/43DS*** T*-65/55DS*** T*-49/43D*** T*-50/40/32DS*** TH-32D400 T*-40/32D*** (P + A + GK) WiFi : only DS*** series BT : only TC-**DS6**, TX-**DS630 series GK board : depend on the model...
  • Page 6 Main Board Structure D4** DS6** DX6**/7**/8** DX900 (4K) (4K) 32inch A+P / 40inch A+P+LDP 43inch A+P+LD A+P+LD 49inch A+P+LD A+P+LD 50inch 55inch A+P+LDP A+P , A+P+PB: (only TH-55DX640*, TC-55DX700*) 58inch A+P+PB 65inch A+P+LDP A+P+PB A+P+PB Except K, GK boards...
  • Page 7 Board Layout -1 ( 32D400 ) AC input Speaker Speaker Board Name Function A-Board Main Board P-Board Power supply, Backlight Drive, Power key, Control key K-Board Remote Receiver, LED...
  • Page 8 Board Layout -2 ( 49DS630 ) A+P+LD/LDP WiFi Module AC input Speaker Speaker (T-CON) Not repairable, One of the panel module Board Name Function Board Name Function A-Board Main Board GK-Board P-Board Power supply for Signal Process K-Board Remote Receiver, Power LED LD-Board Power supply for Backlight Drive...
  • Page 9 Board Layout -3 ( 65DX900 ) A+P+PB PB6 P6 AC input Speaker Speaker Bluetooth Module WiFi Module (T-CON) Not repairable, One of the panel module Board Name Function Board Name Function A-Board Main Board GK-Board P-Board Power supply for Signal Process K-Board Remote Receiver, Power LED PB-Board...
  • Page 10 2. Video Signal Processing...
  • Page 11 Video/Audio Signal Process - 1 D4** series OPT_out USB1 IC8000 Antenna TU670* IC68** (MTK5561) terminal TUNER De-Modulation Resize IP conv. LVDS Data Component to LCD Panel HDMI1/2 The input terminals are different by the models or countries.
  • Page 12 Video/Audio Signal Process - 2 DS6** series OPT_out WiFi IC8601 Bluetooth (USB HUB) USB1/2 IC8000 TU670* Antenna (Peaks LD6/ IC68** TUNER terminal sLD8A) De-Modulation Resize IP conv. Component LVDS Data SCART (Europe) to LCD Panel IC8650 (LAN) CI - slot (Europe) HDMI1/2/3 The input terminals are different by the models or countries.
  • Page 13 Video/Audio Signal Process - 3 DX6** / DX7** / DX8** series OPT_out WiFi IC8601 (*1)Bluetooth (USB HUB) USB2 USB1 USB3.0 IC8000 Antenna to LCD Panel TU670* IC68** (MT5810) IC9000 terminal TUNER (Mstar/NTK) De-Modulation Resize IP conv. Frame Rate Convert 2D->3D Component ( V by One format ) CI - slot...
  • Page 14 Video/Audio Signal Process - 4 DX900 series OPT_out WiFi Bluetooth IC8705 (USB HUB) USB2 USB1 USB3(3.0) to LCD IC8000 SD card (MT5810) Panel IC9000 (only TC/TX IC4300 (NTK) IC68** Resize (GCEX2) TU670* Antenna De-Modulation IP conv. TUNER Frame Rate terminal Convert 2D->3D Hexa-...
  • Page 15 Video/Audio Signal Process - 5 The main function of the A board is to select and process one of the incoming video signals. IC8601 ( or IC8705) is just switches of USB signals. The built in WiFi module is connected by USB type of terminal.
  • Page 16 Troubleshoot for Video Signal Problem :When abnormal picture is displayed, troubleshoot by the test pattern in LCD module. If the picture is no problem, A board must be defective. If the picture is also abnormal, LCD panel module must be defective. Just in case, confirm the flat cable connection between A board and T-CON board.
  • Page 17 Troubleshoot for Video/Audio Signal Problem Customers also can check the picture and sound by internal data. If the picture and sound is no problem, the reason of trouble is mostly not a TV. How to display : Menu HELP TV Self Test...

  • Page 18: Power Supply

    3. Power Supply 3-1. Power Board Structure...
  • Page 19 Power Board Structure 1 ( P Board only ) < P > VLED Anode Power Cathode Drive (Backlight) Power BL-ON BL-ON STB5V...
  • Page 20 Power Board Structure 2 ( P+LDP/LD board ) < P + LDP/LD > LDP/LD VLED Anode Power Cathode Drive (Backlight) Power BL-ON BL-ON STB5V...
  • Page 21 Power Board Structure 3 ( P+PB board ) < P + PB > only 65DX7**/8** VLED1 Anode Power (TNPA6249) Cathode Drive VLED2 Anode Power Power Cathode Drive (Backlight) BL-ON Power STB5V (TNPA6060)
  • Page 22 Power Board Structure 4 ( P+PB board ) < P + PB > only DX9** VLED1 (TNPA6200) Anode Cathode Power Drive (Backlight) VLED2 Sync/control/ c Power BL-ON Power STB5V (TNPA6199)
  • Page 23 3-2. Stand by / Start up Operation The explanation is for the case of “Power Board Structure 2 (P+LD/LDP board, 43/49DS630 )”, but “P, P+LD/LDP, P+PB” cases have similar start up operation.
  • Page 24 Voltage Distribution ( A+P+LD Boards ) Ex. 43/49DS630** series LCD Module (Each models are different pin allocation but operation is same.) LCD Panel 28V/32V(*) 8,9 8,9 Output T-CON VLED1,2(*) board Drive PNL12V (Ex. TNPA5935** ) 1,2,3,4 BL_ON F15V 1,2,3 1,3,5 Output PNL12V TV_SUB_ON...
  • Page 25 Reference : Voltage Distribution ( A+P+PB Boards ) Ex. DX900** series LCD Module (TNPA6200** ) VLED2(*) 17-28 LCD Panel 9,10 Drive VLED(*) Output VLED1(*) 17-28 T-CON 9,10 board BL_ON PNL12V 1 / 3 1 1 / 3 44 - 51 BL_ON F15V PNL12V...
  • Page 26 Start up Operation-1 Ex. 43/49DS630** series (Each models are different pin allocation but operation is same.) LCD Module Transformer T7301 Q7402/05 L7813/14/ VLED1,2(*) 24V/32V(*) Power Q7804/01 LCD Panel 24V/ Output 32V(*) T7202 (light) (DC/DC) (Back T-CON IC7201 Light) board Drive IC7800 DC/DC PNL12V...
  • Page 27 Start up Operation-2 < from AC plug in to : P board > Ex. 43/49DS630** series Anode1 ( TNPA5916** ) ( PFC = OFF T7301 Q7402/05 ( Through ) D7401/02 D7215 AC100V: 140V ( OFF ) C7422 T7202 C7213 D7106 Anode2 AC240V: 330V) Rectifier...
  • Page 28 Start up Operation-3 < from AC plug in to : P board > When the TV is plugged in, the rectifier start to produce DC voltage which leads through PFC circuit directly to the power switches Q7301, Q7302. (PFC circuit IC7201 does not operate at this moment.) Besides this DC voltage is provided also for D7104, D7105 which provide start voltage to pin 1 of power supply IC 7301.
  • Page 29 Start up Operation-4 : A board > < from Ex. 43/49DS630** series LCD_TV_SUB_ON IC8000 IC5000 STB3.3V PEAKS IC7503 3.3V STB5V Signal REMOTE Processing 3.3V KEY3 POWER LED_on Switch (Each models are different pin allocation but operation is same.) Standby (It can receive only Power SW) (It can receive Power SW, Remote, Viera Link and so on) North America Power LED: OFF...
  • Page 30 Start up Operation-5 : A board > < from The STB5V from pin7 of connector P2 is applied to the Analog ASIC (IC5000) for supplying power to the Main CPU/PEAKS (IC8000) on the A board. The Analog ASIC (IC5000) converts the STB5V to STB3.3V. This voltage energize and prepare the microprocessor (CPU) for program execution.
  • Page 31 Start up Operation-6 < from : P/LD board > L7814 Ex. 43/49DS630** series Anode1 Q7804 SRV-VLED ( TNPA5916** ) SRV-VLED1 ( PFC = ON T7301 D7215 D7401/02 SRV-VLED2 AC100V: 380V Q7402/05 T7202 C7213 C7422 L7813 Anode2 D7106 AC240V: 380V) Rectifier Cathode1 Q7801 Q7301...
  • Page 32 Start up Operation-7 : P board > < from When the power board receives the TV_SUB_ON signal from IC8000 via pin 9 of connector P2, it outputs 2 different voltages: 16V to the A board on pins 1, 2 and 3 of connector P2. 24/32V(*) to the LED backlight board on pins 8,9 of connector P4.
  • Page 33 Start up Operation-8 < : A board (SUB voltage) > Ex. 43/49DS630** series 3, 7 VLED1/2(*) IC7800 DCDC Drive IC8000 24/32V(*) PEAKS SRV-16V 24/32V LCD_TV_SUB_ON T7202 DC/DC Q7402 IC7201 IC5000 Output STB3.3V IC7503 STB5V ransformer ANALOG F15V DC/DC T7301 ASIC IC7301 Output Q7403...
  • Page 34 Start up Operation-9 : A board (SUB voltage) > < The 16V(F15V) from the P board via pin1,3 and 5 of connector A02 is applied to Analog ASIC IC5000 and ICs (Voltage regulators) on the A board to generate the SUB-Voltages used for signal processing operation.
  • Page 35 Start up Operation-10 < : A board (PNL voltage) > T-CON LCD Module Back Light 3, 7 1, 5 IC5500 VLED1/2(*) PNL12V IC7800 DCDC Panel_VCC_ON2 Drive IC8000 24/32V(*) BL_SOS PEAKS BL_ON 24/32V LCD_TV_SUB_ON T7202 DC/DC IC5000 IC7201 STB3.3V Output Q7402 IC7503 STB5V F15V...
  • Page 36 Start up Operation-11 : A board (PNL voltage) > < The F15V is also used to generate the PNL-Voltage on A board. IC8000 outputs the Panel VCC ON2 signal. IC5500 starts generating the PNL12V by this signal. The PNL12V is provided to T-con circuit of the LCD Module. : LD board ( backlight drive ) >...
  • Page 37 Start up Operation-12 < : LD board ( backlight drive ) > L7814 Ex. 43/49DS630** series Anode1 Q7804 SRV-VLED ( TNPA5916** ) SRV-VLED1 ( PFC = ON T7301 D7215 D7401/02 SRV-VLED2 AC100V: 380V Q7402/05 T7202 C7213 C7422 L7813 Anode2 D7106 AC240V: 380V) Rectifier Cathode1...
  • Page 38 Simple Power On Sequence (D/DS Series) < DS/D series > (*) The DC level is different by the LCD panel. ( Plug in ) AC Plug in STB5V output STB5V (form P to A) Power On Standby Power Off Standby / Power on Power LED Red Power LED off Power LED...
  • Page 39 Simple Power On Sequence (DX Series) < DX series > Also 16V is necessary before Power LED on at first time. (*) The DC level is different by the LCD panel. ( Plug in ) AC Plug in STB5V output STB5V (form P to A) TV_SUB_ON signal Power on...
  • Page 40 (Reference : State Transition Diagram) < Except the Americas > Pow-SW Stand-by Pow-SW Power Off Power On Remote LED: OFF LED: Red LED: Green Plug Plug Plug Plug Plug Plug AC Off < The Americas > Stand-by Power On Pow-SW / Remote LED: OFF LED: Red...
  • Page 41 4. SOS Protection Circuit and Troubleshooting (Except 1 time blink )
  • Page 42 LED Blinking Summary When an abnormality occurs in the unit, the “SOS Detect” circuit is triggered and the TV shuts down. Shut down means that turn off the TV_SUB_ON signal. The power LED on the front panel will flash a pattern indicating the circuit that has detected an abnormality.
  • Page 43 Protection Circuit Back Light LCD Module T-CON Back Light 3, 7 1, 5 IC5500 VLED1/2(*) PNL12V IC7800 IC8000 DCDC Panel_VCC_ON N SOS Drive IC4900 SOUND_SOS 9 Blink 24/32V(*) BL_SOS 1 Blink N SOS BL_ON LCD_TV_SUB_ON (OFF) 24/32V ON OFF IC5000 T7202 7 Blink IC7201...
  • Page 44 Troubleshooting for LED Blinking ( Quick 3 time blink ) LED blinks Detail error Board may defect Quick 3 Power on problem (No F15V/SUB3.3V/SUB1.5V voltage) F15V(16V) is supplied from P board. If the F15V /SUB voltage is not supplied LED blinks 3 times (quick blink). Ex.
  • Page 45 Troubleshooting for LED Blinking ( 9 time blink ) LED blinks Detail error Board may defect Audio amplifier: SOUND_SOS A/Speaker Audio amplifier is sourced power F15V from P board. If the amplifier 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.
  • Page 46 Troubleshooting for LED Blinking ( only DX900 : 11 time blink ) LED blinks Detail error Board may defect Fan_SOS Fan/A If one of the fan does not work, Fan_SOS signal will go high level and be detected by IC8001 LED blinks 11 times.
  • Page 47 Troubleshooting for LED Blinking ( 5/7/10/12/13/16 time blink ) LED blinks Detail error Board may defect Memory (eMMC: IC8903) read problem (only Euro DS6** ) No voltage SUB3.3V detected FRC_SOS (Initialization of IC9000) (only DX*** series) Back End SOS (inside of Peaks) Emergency SOS GCEX_SOS (IC4300) (only DX9** series)
  • Page 48 Troubleshooting for No Picture and No OSD (Power LED is lit = No blinking) Refer to the block diagram “Troubleshooting for LED Blinking (1 time blink )” Patterns are displayed Try the “LCD Panel Replace A board Test Mode” No Picture LED blink (except TC- model) LED off (TC- model) Is the power LED situation...
  • Page 49 Troubleshooting for No Power On (Power LED is off = No blinking) < DS/D series > Check if the output of Replace A board STB5V. Disconnect A02 connecter. Short check of STB5V line Replace P board in A board. Shorted Shorted Replace A board...
  • Page 50 Troubleshooting for No Power On (Power LED is off = No blinking) DX series need both STB5V and 16V before lighting power LED (Refer to Page 39) < DX series > Check if the output of Check if the output 16V Replace A board STB5V.
  • Page 51 5. SOS Protection Circuit and Troubleshooting ( 1 time blink )
  • Page 52 Troubleshooting for LED Blinking ( 1 time blink ) -1 LED blinks Detail error Board may defect BL_SOS (LED driver) Panel / LD / P (*)VLED : The DC level is different by the LCD panel. If the IC7800 detects 1.
  • Page 53 Troubleshooting for LED Blinking ( 1 time blink ) -2 Ex. 43/49DS630** series Refer to the previous page block diagram. (Power off) Connect LD1 and LD2 Disconnect LD1 and LD2 connectors. Power on. Both OK connectors. Short check between Check if the voltage Panel Module pin8,9 of LD1 and GND,...

  • Page 54: Lcd Panel

    Troubleshooting for LED Blinking ( 1 time blink ) -1 Ex. DX900** series VLED2 LCD Module 17-28 9,10 Back SRV-VLED2 light LCD Panel Power Photo Anode coupler SRV-VLED1 Drive T-CON Cathode VLED1 17-28 board 9,10 IC9000 BL-ON Power BL-ON Photo Sync/control/…...
  • Page 55 Troubleshooting for LED Blinking ( 1 time blink ) -2 Ex. DX900** series Refer to the previous page block diagram. Power on. Check if the voltage Both OK Panel Module of SRV-VLED1(pin17-28 of PB1) 58V(*), and SRV-VLED2 (pin17-28 of 88V(*) PB2) before LED 1 blink? (Power off) Disconnect...
  • Page 56 Troubleshooting for LED Blinking ( 1 time blink ) -1 Ex. 32D400, 32DS600 series LCD Module Back SRV-VLED T7301 D7507/08 Q7501 light L7801 Anode C7502 24/32V(*) 70V(*) LCD Panel Q7801 Q7803 Cathode T-CON board Drive IC7800 D7502 (Low=Normal) C7512 Q7502 (Low=Normal) BL_SOS...
  • Page 57 Troubleshooting for LED Blinking ( 1 time blink ) -2 Ex. 32D400, 32DS600 series Connect P3 connector. (Power off) Power on. Does the blinking start Disconnect P3 connectors. Check if the voltage Panel Module soon after power on? Short check between Both 70V(*) of SRV-VLED(pin 3 of P3)
  • Page 58 Backlight Drive Structure -1 D4** DS4**/5**/6** DX6**/7**/8** DX900 (4K) (4K) 24inch 32inch A+P / (India : 1 Board) 40inch A+P+LDP 43inch A+P+LD A+P+LD 49inch A+P+LD A+P+LD 50inch 55inch A+P+LDP A+P , A+P+PB: (only TH-55DX640*, TC-55DX700*) 58inch A+P+PB 65inch A+P+LDP A+P+PB A+P+PB Except K, GK boards...
  • Page 59 Backlight Drive Structure -2 < . A+P > LCD Panel Module LCD Panel Module VLED(*) VLED(*) 24/32V(*) Backlight Backlight 24/32V(*) Drive Drive BL_ON BL_ON 16V, STB5V LCD Panel 16V, STB5V LCD Panel PNL12V PNL12V IC8000 IC8000 (Peaks/MTK T-CON (Peaks/MTK T-CON Resize Resize IP conv.

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