Polaroid LC20H15 Service Manual Download | Manualshive

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LCD

TELEVISION

LC20H

15

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Summary of Contents for LC20H15

Page 1: ...LCD TELEVISION LC20H15...

Page 2: ...Adapter FSP060 1A 1 615 10483 03 Stand Assy 1 667 L20H3 14A Backlight Board 1 FLM 2011 Functional Board List LCD Plasma Televisions Please note that this BOM list may vary from the original documentat...

Page 3: ...hooting Method of software upgrading Briefing on LC20H15 and its working principle Wiring diagram Serial NO of parts Identification criteria for the bright spot and dark spot of the LCD screen Trouble...

Page 4: ...t will cause fire or damage to the set 2 4 Never operate the set or do any installation work in bad environment such as wet bathroom laundry kitchen or nearby fire source heating equipment and devices...

Page 5: ...e tabulated as follows Temperature Scope for operation 0 50 C Scope for storage 20 60 C humidity Scope for operation 20 85 Scope for storage 10 90 2 13 Display of a fixed picture for a long time may r...

Page 6: ......

Page 7: ...ss to 50 and contrast to 50 Adjust the line center and the field center so that the picture is correctly positioned h Input signal of 16 gray grades Gray H 16 Enter the factory menu and perform calibr...

Page 8: ...0I 50 Hz 480I 60 Hz separately and check if the picture and sound is normal 8 Preset ex works In the status of TV enter the factory menu by pushing the factory key and then perform presetting 9 Ex wor...

Page 9: ...e liquid crystal TV set and make proper adjustment according to the signal types Picture too bright and there is distortion in the brightest area Check if the contrast setting is too high Possibly the...

Page 10: ...may lead to incorrect display of the liquid crystal TVIn this case please press auto key on the remote control so as to enable the liquid crystal TV set to recheck the signal and then to display corr...

Page 11: ...it s ready to run For other settings please refer to the Fig Above already defaulted by the system normally no need to change 4 Switch on TV set the FLASH write program begins to run 5 After FLASH wri...

Page 12: ...n42 PIN43 PIN44 Audio frequency signal is processed with sound in IC N1 VCT3833 Pin19 and then output through MSP3420G Pin28 Pin27 to SRS for surround sound processing in IC N6 M62494E Finally it is s...

Page 13: ...ROCESS CHIP C BUS VIDEO OUT CRYSTAL 20 25M VIDEO DECODING C BUS C BUS TUNER ANTENNA Supply 12V to LCD panel supply 12V to backlight and power amp sound processing c BUS SPEAKER EARPHONE OUTPUT POWER...

Page 14: ...h various kinds of three terminal stabilizing integrated circuits is output as 1 8 V and 2 2 V U3 is a power supply managing IC which cuts off the 5 V output in the case of standby so as to keep low p...

Page 15: ...broad band chroma etc for the use of S VHS broad band broad chroma If self adaptive comb filter is used to carry out high quality Y C separation then the color decoder conducts the processing in S VHS...

Page 16: ...sound processing from analog IF signal input to AF OUT audio output after processing is performed in this single chip The sound signal of TV AV S VIDEO Y Pb Pr VGA is input through the ports of MSP34x...

Page 17: ...d restore the stereo sound that is taking place at the site It is a patented sound technology of SRS Lab USA The signal is fed to pins 1 and 2 of M62494 through pins 27 and 28 of MSP34x0 After process...

Page 18: ...cy amplifier of category D The gains scope provided is 40dB to 36dB Supply voltage is 12V The input of the amplifier is differential input any noise at the two input sides of the channel can be elimin...

Page 19: ...and with phased in and phased out function PW1306 includes an 80X86 CPU 16 bit micro processor with interruption port universal I O ports VART port IR decoder PWM output port and timer and a memory po...

Page 20: ...Memory Out Bus Mem ory Buffer Processor Mem ory Interface Memory In Bus OSD PW1306 Video ImageProcessor Internal Block Diagram ADC Sync Processing HS SOY Stripper PLL CLK A D Clamp A D Clamp VS Pow er...

Page 21: ...18 WIRING DIAGRAM...

Page 22: ...point if its area exceeds 1 2 of a single picture element R G B 2 Definition of bright spot It is identified as a bright spot if it is bright in the state of dark field and its bright size remains un...

Page 23: ...signal Check whether U1 pin 11 have output waveform Check N8 pin3 pin 5 s input signal Replace N8 Yes No Yes No No No Yes No No 20 Troubleshooting guide No raster Does the logo appear on the screen wh...

Page 24: ...B Hors Vers at X7 Check whether N1 has 5V power supply Check whether X9 pin 1 pin 2 have 5V power input Replace N2 Replace V105 V17 Replace N1 Measure N1 pin 33 pin 35 waveform Measure N1 pin 42 pin...

Page 25: ...YNC VSYNC PI5V330A PI5V330B IR ROMWEn ROMOEn A 19 1 D 15 0 NMI LVDSON DRE 7 0 DRO 7 0 DGE 7 0 DGO 7 0 DBE 7 0 DBO 7 0 DCLK DVS DHS DEN BLKON PWM LCDON RXD TXD HOLD FLASHID SDA1 SCL1 BUSY POWER REQ PW1...

Page 26: ...10V100u AVDD L103 STPB 300 V5 C117 0 1u L108 6 8uH C119 0 1u L106 STBH 181 C115 10V47u L107 STBH 102 C127 0 1u L110 22uH C129 10V100u LCDON LVDSON VD104 IN4148 VD105 IN4148 S1 1 G1 2 S2 3 G2 4 D2a 5...

Page 27: ...7 VCC 8 U11 24LC21 R220 10K C210 0 1u 1 2 3 4 5 6 GND 7 8 9 10 11 12 13 AVDD 14 U6 74HC14A L202 751H L201 751H R231 22 R230 22 R232 2 2K R233 2 2K C221 22p C220 22p C222 0 1u C223 10V 10u R G B H V X...

Page 28: ...PORTA3 205 PORTA2 206 PORTA1 207 PORTA0 208 U18 PW130 DVDD1 VDDQ3 VDDQ3 V18 VDDQ3 V18 V18 V18 VDDQ3 V18 AVDD DVDD1 V18 VDDQ3 AVDD V18 GND GND L303 22uH R311 3 3K C318 39n C319 3 9n GND C310 47n C309...

Page 29: ...10K R502 3 3k GND VDDQ3 VDDQ3 V5 VDDQ3 VDDQ3 GND GND GND GND GND GND GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45...

Page 30: ...n By C608 0 1u C607 16V 100u 1 2 3 4 X602 R609 51 R610 51 GND V5 TXD RXD X603 GND BUSY SCL1 SDA1 1 REQ PGND2 LCDVCC 1 2 3 4 X604 GND V5 SDA SCL X901 C901 10V22u C902 0 1u 1 2 3 U901 HWJS538 VD901 R901...

Page 31: ...P4 HEADER 20X2 VDDQ3 VDDQ3 DBO 7 0 DBE 7 0 DGO 7 0 DGE 7 0 DRE 7 0 DRO 7 0 DCLK PWM LCDON BKLON SCL LVDSON DEN DHS DVS RESET SDA LCDVCC C706 10V 100u VD701 IN4148 VD702 IN4148 VD703 IN4148 R706 100K R...

Page 32: ...3 2K R12 3K9 C43 220n C42 100n C40 470p SRS STEREO SRS MONO ROUT1 LOUT1 LOUT1 ROUT1 L4 33uH C83 16V 10u L12 10uH 1 GND 2 3 GND 4 5 GND 6 Hs 7 GND 8 Vs 9 R G B X7 GND R109 10K C153 1n C154 25V 470u R10...

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