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TECHNICAL TRAINING

FL9.1 LCD TV
CHASSIS FOR
2009

P & F USA, INC
SUITE 100
3015 WINDWARD PLAZA
ALPHARETTA, GA 30005

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Summary of Contents for FL9.1

Page 1: ...TECHNICAL TRAINING FL9 1 LCD TV CHASSIS FOR 2009 P F USA INC SUITE 100 3015 WINDWARD PLAZA ALPHARETTA GA 30005 ...

Page 2: ...ct Diagram 8 Video Signal Flow 9 Video Signal Flow Block 10 Video Signal Flow Block two 11 Audio Signal Flow 12 Audio Signal Flow Block 13 Power Supply Block 14 Power Supply 15 Protect 1 15 Protect 2 16 Inverter 17 Inverter Signal Flow Block 18 System Control Block 19 Service Mode 20 Service Menu Map 22 Troubleshooting Flow Charts 23 27 Abbreviation List 28 Service Tips 30 ...

Page 3: ...is Model Brand 32PFL3504D F7 Philips 32PFL3514D F7 Philips 32MF339B F7 Magnavox LC320SLX Sylvania LC320SSX Sylvania LC320EMX Emerson The following is the Jack panel for the Magnavox version The Jack panel is the same for all models using this chassis Supported display resolutions Computer Resolution Refresh rate 640 x 480 60Hz 720 x 480 60Hz 800 x 600 60Hz 1024 x 768 60Hz 1280 x 768 60Hz 1360 x 76...

Page 4: ...pears when pressing the menu but ton on the remote The Settings Assistant is only present on the Philips branded product The Magnavox Sylvania and Emerson sets have menus with a similar look and the same function The screen to the right is the Sylvania first screen from the initial out of box setting In the Service mode this is called initialized mode The initial ized mode will be explained in the...

Page 5: ...s menu in the Magnavox Sylvania and Emerson sets Out of box the Child Lock pin is 0000 If the customer forgets their pin unplugging the set will reset the pin to 0000 Current Software can also be viewed To load new software Philips Only 1 Down the latest version from the customer website zip 2 Unzip the file and extract the ecc file and load it in to the root directory of a USB drive 3 Unplug the ...

Page 6: ...EVELING TV SPEAKERS AUTOPROGRAM CHANNEL LIST ADD CHANNELS ANTENNA CLOSED CAPTION CHILD LOCK PC SETTINGS ENERGY SAVING MODE LOCATION CURRENT SOFTWARE INFO ENGLISH ESPANOL FRANCAIS PERSONAL STANDARD MOVIE MUSIC NEWS ON OFF SPEAKERS EASY LINK CAPTION SERVICE DIGITAL CAPTION SERVICE CAPTION STYLE CHANNEL LOCK US MOVIE RATINGS LOCK CANADIAN ENGLISH RATING CANADIAN FRENCH RATING REGION RATINGS LOCK CHAN...

Page 7: ... Digital Main board The USB port on this chassis is only used for software upgrade The Tuner AV inputs and Audio Amplifier are located on the Power Supply board The power supply produces a AL3 3V supply for standby power When the set is turned On the supply produces a 16 3 3 3 7 5 9 13 and 33 volt supplies The Inverter Provides the drive voltage for the panel backlights Inverter Power Supply Digit...

Page 8: ... High This switches the power supply to the full power mode Protect If any of the supplies fail or the Inverter board is not functioning the Protect lines will cause the set to shut down In normal operation the Protect lines should read as follows Protect 1 2 4V Protect 2 0 0V Protect 3 3 3V Since a failure in the Protect lines will cause an immediate shutdown the power supply should be forced On ...

Page 9: ...16V LCD 16 P ON 3 3V and LCD 6 8V supplies are fed to the Inverter board via connector CN201 The Inverter is switched On by the BACKLIGHT SW voltage This voltage is generated on the Digital Main board and routed through the Power Supply board to the Inverter via connector CN201 pin 5 on the power supply The voltage from the Digital Main to the Power Supply can be checked on pin 26 of CN301 on the ...

Page 10: ... LCD 6 8V 7 P ON 3 3V 6 P ON 3 3V 5 GND 4 VGH 3 LCD 16V 2 LCD 16V 1 GND CN3902 24 GND 23 LLV0 22 LLV0 21 LLV1 20 LLV1 19 LLN2 18 LLV2 17 GND 16 LLVCLK 15 LLVCLK 14 GND 13 LLV3 12 LLV3 11 LLV4 10 LLV4 9 LLV5 8 LLV5 7 GND 6 TP 5 POL 4 CPV 3 OE1 2 XAO 1 STV CN3701 CN301 23 19 21 15 17 22 20 18 16 14 10 12 6 8 13 11 9 7 5 1 3 4 1 5 3 9 7 2 4 6 8 10 14 12 18 16 11 13 15 17 19 23 21 20 2 P ON H2 AUDIO L...

Page 11: ...to an internal Demodulator and Digital processor The three HDMI inputs are fed to an internal HDMI switch and receiver Whatever signal is fed to IC3301 the IC rescales the video to fit the resolution of the screen which in this case is 720p The signal is output from IC3301 in an LVDS format and then fed to IC3901 IC3901 develops the drive signals for the LCD panel and is output using a RSDS format...

Page 12: ...N 3 S VIDEO Y IN 1 5 3 1 JK751 S VIDEO IN C Y JK752 VIDEO IN S VIDEO SW IN 2 2 POWER SUPPLY CBA TU301 DIF OUT1 11 DIF OUT2 10 TUNER UNIT IF AGC 9 CN302 CN3702 DIF OUT1 26 26 IF AGC 24 24 DIF OUT2 28 28 DIF OUT1 DIF OUT2 IF AGC CN302 CN3702 VIDEO IN S VIDEO C IN S VIDEO Y IN S VIDEO SW COM VIDEO Y IN COM VIDEO Pr IN COM VIDEO Pb IN TO DIGITAL SIGNAL PROCESS BLOCK DIAGRAM WF1 WF2 WF3 WF4 WF5 WF6 VID...

Page 13: ...SCL 7 9 4 6 1 3 10 12 16 15 7 9 4 6 1 3 10 12 16 15 JK3702 TMDS D0 TMDS D0 TMDS D1 TMDS D1 TMDS D2 TMDS D2 TMDS CLOCK TMDS CLOCK SDA SCL A9 B9 C8 C9 B8 A8 B10 A10 A11 B11 A5 B5 C4 C5 B4 A4 B6 A6 A7 B7 TMDS CLOCK TMDS CLOCK DEMODULATOR MPEG DECODER AE2 AF7 AUDIO I F TO AUDIO BLOCK DIAGRAM ACLK ADATA1 BCLK LRCLK ADATA0 SPDIF AD14 AD9 AD12 AD10 AD11 AC10 DATA 0 15 ADDESS 0 12 IC3201 A13 15 A18 A21 23...

Page 14: ...ply board The audio input is selected by IC771 which is controlled by the INPUT1 and INPUT0 lines from the microprocessor Selected audio is fed to the Digital Main board via connector CN302 on the power supply board Digital and analog tuner audio is processed by the signal processor on the digital main board Selected audio from the processor on the digital main board is fed to IC3803 and then to t...

Page 15: ... 36 31 32 MUTE CONTROL CN801 CL801 SP801 SPEAKER L CH CN802 SP R 1 CL802 SP802 SPEAKER R CH PWM1 PWM2 DRIVE1 CN302 CN3702 AUDIO MUTE 20 20 JK841 DIGITAL AUDIO OUT COAXIAL Q841 Q771 Q772 BUFFER Q871 Q873 Q874 MUTE Q872 MUTE SPDIF 2 2 SP R 2 SP L 1 SP L 2 Q801 CONTROL LOGIC 3 10 9 13 IC871 OP AMP 1 3 7 5 DRIVE2 DRIVE IC3802 D A CONVERTER D A CONVERTER 15 14 8 7 6 5 L CH R CH IC3801 D A CONVERTER D A...

Page 16: ...8V INV 16V VGH P ON 3 3V P ON 3V P ON 7V AL 3 3V P ON 3 3V P ON 5V INVERTER CBA DIGITAL MAIN CBA UNIT 13 LCD 6 8V 13 P ON 3 3V 19 20 P ON 3 3V 12 10 VGH 10 INV 16V 2 LCD 16V 8 9 AL 3 3V 21 22 16 10 P ON 7V 16 P ON 3V 10 P ON 5V 13 14 Q210 Q201 Q212 SW 24 5V CAUTION Fixed voltage or Auto voltage selectable power supply circuit is used in this unit If Main Fuse F601 is blown check to see that all co...

Page 17: ...38 Q639 and Q637 to turn the P ON 3 3V supply On The P ON H1 line switches Q207 and Q208 This switches Q210 Q201 and Q212 to switch the VGH voltages Q211 is turned On switching the LCD 6 8V supply It also switches Q209 switching the LCD 16V supply Q501 is switched to turn on the INV 16V supply Q642 is switched to produce the P ON 9V supply Protect 1 Figure 7 Protect 1 is connected to all of the su...

Page 18: ...l power mode Q635 regulates the voltage feeding IC631 AL3 3V regulator If Q635 fails the voltage at the emitter of Q635 would exceed the voltage of the 10 volt zener D407 causing it to conduct This will cause the PROTECT 2 line to go High resulting in the TV set turning Off 3 3V REG D660 D636 2 7 R636 2 7 D637 IC631 AL3 3V D407 10V D418 3 9V PROTECT2 R662 15 R660 R663 1 8K R664 1 8K D659 6 8V Q635...

Page 19: ...ge protec tion circuits If a problem is detected in one of the outputs Q1600 is turned On causing the Protect 3 line to go Low This will cause the set to turn Off System Control Figure 10 Control signals from the Function board and IR Sensor board are routed through the power supply board to IC3301 IC3301 preforms all of the system control functions Note that the P ON HI voltage in pin 5 of CN101 ...

Page 20: ...Q1502 Q1503 DRIVE OSC PWM CONTROL LOGIC VCC DCT CURRENT CONTROL SWITCH CURRENT CONTROL SWITCH OVER VOLTAGE PROTECTOR Q1260 OVER VOLTAGE PROTECTOR OVER VOLTAGE PROTECTOR Q1261 OVER VOLTAGE PROTECTOR OVER VOLTAGE PROTECTOR OVER VOLTAGE PROTECTOR OVER VOLTAGE PROTECTOR OVER VOLTAGE PROTECTOR Q1060 OVER VOLTAGE PROTECTOR Q1061 OVER VOLTAGE PROTECTOR 11 8 5 6 15 3 4 12 16 2 1 SW 16V SW SW 16V Q1600 Q16...

Page 21: ...N H1 PROTECT2 PROTECT1 P ON H2 P ON H1 R23 JUNCTION CBA CN101 KEY IN1 6 6 CL103A KEY IN1 3 3 CN201 CN101 CN301 Q172 CN3701 AB23 BACKLIGHT ADJ IC3101 MEMORY SCK SI SO AB25 AB24 AC25 AC24 6 5 2 1 E11 3 AC19 SCL SDA CN301 CN3701 CS WP SCK SIN SOUT CS WP IC201 Q203 Q204 Q205 DRIVE 22 22 SCL 21 21 SDA 11 11 PROTECT1 15 15 PROTECT2 5 5 PROTECT3 29 29 VCOM PWM 26 26 BACKLIGHT SW 28 28 BACKLIGHT ADJ KEY I...

Page 22: ...y to press a hidden button on the remote control As shown to the right it is necessary to have a Magnavox remote for entering the service mode for the Magnavox and Philips models Service mode for the Sylvania LC320SLX and Emerson LC320EMX Remote for the LC320SSX With the LC320SSX remote the remote cover can be peeled back rather than cutting a hole in the remote Page 20 ...

Page 23: ...On for the first time Grey Scale alignment To perform the grey scale alignment press the Vol button three times until C D appears on the screen Then select the desired Cutoff and Drive adjustments Use the channel up down button on the remote to adjust the respective cutoffs or drives Default values are listed below Select Adjustment Value 1 COR Cutoff Red 187 2 COG Cutoff Green 0 3 COB Cutoff Blue...

Page 24: ...MAIN MENU 7 7 BLACK SCRN SHADE GRY SHADE WH SHADE RED GREEN BLUE WHITE RED CH DOWN CH DOWN CH DOWN CH DOWN CH DOWN CH DOWN CH UP CH UP CH UP CH UP CH UP CH UP CH DOWN CH UP CH DOWN CURSOR LF CURSOR RG MENU FIGURE 11 SERVICE MENU Page 22 Other Test Modes Pressing the left cursor button on the remote while in the service mode will switch on a screen test mode Press the cursor up followed by the curs...

Page 25: ... or replace the power supply board Yes Replace the Digital Main board No Yes Replace the Digital Main board Yes Does the set turn on when KEY IN1 is grounded No No Repair the Keyboard and check the IR sensor and remote Yes Yes Does the Power LED stay On If the power LED stays On the panel backlight is On Yes Is OSD On Screen Display Menu present when the Menu button is pressed No Video Yes Digital...

Page 26: ...ower supply Low High Is approximately 160V DC present between pins 1 and 2 of CN602 on the power supply Reconnect the Digital Board and monitor the PROTECT3 voltage on pin 6 of CN201 as the set is turned On Yes Repair or replace the power supply board No Does the PROTECT3 line go to 3 3 volts when the set is turned On Does the BACKLIGHT SW on pin 5 of CN201 go to 3 3 Volts when the set is turned O...

Page 27: ...bon cables connecting the power supply to the digital board No Replace the power supply board Yes Is tuner video present after auto programming Replace the digital main board No Yes No Check remaining inputs Yes Does video return after connecting an antenna and auto programming No Check remaining inputs Yes Page 25 TROUBLESHOOTING FLOW CHART ...

Page 28: ... place the scope probe in the proximity of the output as shown at the right If you connect directly use a X100 probe The waveform will appear as shown to the right if the output is working Is output present at each location The panel is most likely defective Check panel connections to make sure they are sucure Yes Replace the Inverter board No Page 26 TROUBLESHOOTING FLOW CHART ...

Page 29: ...ins 6 and 8 of CN301 Turn the volume up Change the Digital Main board No Is the audio mute on pin 20 of CN302 zero volts 0 4V Yes Change the Digital Main board No Change the power supply board Yes Page 27 TROUBLESHOOTING FLOW CHART ...

Page 30: ...l source VCR VCD etc CVBS INT CVBS signal from Tuner CVBS MON CVBS monitor signal CVBS TER OUT CVBS terrestrial out DAC Digital to Analogue Converter DFU Directions For Use owner s manual DNR Dynamic Noise Reduction DRAM Dynamic RAM DSP Digital Signal Processing DTS Digital Theatre Sound DVD Digital Video Disc EEPROM Electrically Erasable and Programmable Read Only Memory EPLD Electronic Programma...

Page 31: ...IC containing TV related data for example options OSD On Screen Display Progressive Scan Scan mode where all scan lines are displayed in one frame at the same time creating a double vertical resolution RAM Random Access Memory RC Remote Control transmitter RC5 Remote Control system 5 the signal from the remote control receiver RGB Red Green and Blue The primary colour signals for TV By mixing leve...

Page 32: ...ght Cause Defective Digital Main board Symptom High frequency noise from the TV when Off Cause Audio amplifier not being shut off during standby Cure Upgrade software Symptom No audio on some analog channels Cause Low sensitivity to 4 5mHz carrier Cure Upgrade software Page 30 ...

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