background image

NOTE:

1. RESISTOR

Resistance is shown in ohm [K = 1.000, M = 1.000.000]. All resistors are 1/6W and 5%
tolerance carbon resistor, unless otherwise noted as the following marks.
1/2R = Metal or Metal oxide of 1/2 watt

1/2S = Carbon compsistion of 1/2 watt

1RF = Fuse resistor of 1 watt

10W = Cement of 10 watt

K = 

±

10%     G = 

±

2%     F = 

±

1%

2. CAPACITOR

Unless otherwise noted in schematic, all capacitor values less than 1 are expressed in

?

F, and the values more than 1 in pF.

All capacitors are ceramic 50V, unless otherwise noted as the following marks.

Electolytic capacitor

Mylar capacitor

3. The parts indicated with "

*

  " have special characteristics, and should be replaced with identical parts only.

4. Voltages read with DIGITAL MULTI-METER from point indicated to chassing ground, using a color bar signal with all
    controls at normal, line voltage 220 volts.
5. Waveforms are taken receiving color bar signal with enough sensitivity.
6. Voltage reading shown are nominal values and may vary 

±

20% except H.V.

MODEL : 27WL55A / 27WL55E / 27WL55R / 27WL55T

SCHEMATIC DIAGRAM

WARNING

 : BEFORE SERVICING THIS CHASSIS, READ THE "SERVICE SAFETY PRECAUTIONS" ON PAGE  3  OF

THIS MANUAL.

CAUTION

 : The international hazard symbols "

" in the schematic diagram and the parts list designate components

which have special characteristics important for safety and should be replaced only with types identical to those in the
original circuit or specified in the parts list. The mounting position of replacements is to be identical with originals. Before
replacing any of these components, read carefully the SERVICE SAFETY PRECAUTIONS on the MANUAL for this
model. Do not degrade the safety of the receiver through improper servicing.

Summary of Contents for 27WL55A

Page 1: ...chassing ground using a color bar signal with all controls at normal line voltage 220 volts 5 Waveforms are taken receiving color bar signal with enough sensitivity 6 Voltage reading shown are nominal values and may vary 20 except H V MODEL 27WL55A 27WL55E 27WL55R 27WL55T SCHEMATIC DIAGRAM WARNING BEFORE SERVICING THIS CHASSIS READ THE SERVICE SAFETY PRECAUTIONS ON PAGE 3 OF THIS MANUAL CAUTION Th...

Page 2: ...T 308 23 49 EEPROM1 SHEET 309 24 49 EEPROM2 SHEET 310 25 49 MICRO I O SHEET 400 26 49 OCM MEMORY I F SHEET 401 27 49 FLASH MEMORY SHEET 402 28 49 SYNC SEPA SHEET 403 29 49 E2P OTHER SHEET 404 30 49 STD BY MICOR SHEET 405 31 49 CORTEZ REG 1 SHEET 406 32 49 CORTEZ REG 2 SHEET 407 33 49 CORTEZ REG 3 SHEET 408 34 49 BOOT CONFIG SHEET 409 35 49 SERVICE CONNECTOR SHEET 410 36 49 I2C Switch SHEET 411 37 ...

Page 3: ...Scaling BEP LVD S OSD Micro processor IR I F Digital Input A Digital Input B 2nd Channel Process STAND BY MICRO DDR SDRAM IO EXP DDR SDRAM I2C MSP SIGNAL BOARD I2C PC IN POWER BOARD AC INPUT Audio out AV BOARD TIF EXT in GPIO AD I2C PANEL CORTEZ FLASH ROM EEPROM PANEL I F FLI8532 CIRCUIT BLOCK DIAGRAM ...

Page 4: ... 1 49 27WL55A E R T CONNECTOR ...

Page 5: ... 2 49 27WL55A E R T AV_JACK ...

Page 6: ...D KETSU RM73B1HR00OD KETSU RM73B1HR00OD 16V220 RM73B1HR00OD RM73B1HR00OD 16V220 2SC4081 Q 10k 27K 100 KETSU KETSU KETSU KETSU KETSU 0 01 KETSU KETSU KETSU KETSU KETSU KETSU B1000p B1000p B25V0 01 KETSU ENG39A07GF KETSU KETSU B1000p RM73B1HR00OD KETSU KETSU 0 1uF TEM2121M KETSU 100 100 100 100p OPEN 100 OPEN OPEN 2SA1576A 1k OPEN RM73B1HR00OD OPEN 16V100 OPEN RM73B1HR00OD KETSU B25V0 01 RM73B1HR00O...

Page 7: ...RTK P OPEN 22k 2SC3326 B TE85 F 2SC3326 B TE85 F 10k 10k B50V0 01 18k 50V100u KETSU RN2404 TE85L F OPEN OPEN OPEN OPEN OPEN 100k 2SA1162 Y 1k 100k 100k 10k 2SC4081 Q 22k OPEN 1 8k OPEN TA8246AHQ 1k OPEN OPEN 1 8k OPEN OPEN MA111 B25V0 01 35V1000 35V1000 MA111 63V0 10 1 8W 2 2 1 8W 2 2 63V0 10 35V1000 35V1000 25V47 MA111 MA111 HEAT SINK M M M M M M VCC_GND L R TO POWER DEF L_APRO R_APRO MUTE 18V VC...

Page 8: ...U KETSU KETSU KETSU KETSU KIA7809API HEAT SINK 2SD2396 2SC3852 63V0 33 MTZJ12C 63V0 10 16V100 KETSU KETSU KETSU 2SC2713 GR 1R1 2k 50V10 47k 1 5k 2SC2412K 10k 2SA1887 FA F 22k MTZJ11B MTZJ11B 100k 47k MTZJ11B M M 215mA 180mA 25mA 205mA From SUB_POWER 15mA 5mA 40V 32V 18V 18V1 GND 1 D8 4 B1 5 A1 1 D8 4 B1 5 A2 4 A2 1 D4 1 D6 5 A1 1 B1 1 D5 1 D6 1 D8 1 D6 3 B1 1 D8 1 D4 1 D6 5 A2 1 D7 VCC_AUDIO GND_A...

Page 9: ...2mm_6P_L S6B PH K S 22k 10k 10k CHIP JP 68k PUSH SW 1C1P DC12V 005A PUSH SW 1C1P DC12V 005A PUSH SW 1C1P DC12V 005A PUSH SW 1C1P DC12V 005A PUSH SW 1C1P DC12V 005A PUSH SW 1C1P DC12V 005A CHIP JP CHIP JP PUSH SW 1C1P DC12V 005A CH DOWN 5 KEY_FGND 6 POWER_KEY 3 ADC_IN1 NC 1 2 ADC_IN2 4 GND CH UP VOL DOWN HOUSOU VIDEO VOL UP 27WL55A E R T KEY ...

Page 10: ... C504 R502 R504 R506 C526 R515 R507 Q504 C521 R514 R516 R509 GJ10 C517 C527 CC20 L510 R512 R511 GR34 PV90 GR35 GJ16 GJ13 C501 L504 R501 C507 C502 RR05 DR02 DR01 RR06 DR04 DR05 DR03 RR02 RR01 RR03 RR04 P900A P902A C516 C524 CC31 X501 GC20 C514 L505 4 7u 100 B0 01 16V47u 6 8k 16V47u B25V0 01 2 7k 100 27k B0 01 47k 3 9k 2SA1576A B0 022 1k 47k 15k OPEN 7L_0 47u 2 2u OPEN OPEN 100 OPEN SHORT KRD 8622 S...

Page 11: ...SS355 TE17 2SC2712Y OPEN SCL 003URC3FXGHJ 2SC2712Y SCL 003MC3FXHJK 25V0 1 CHIP_JP 7L10V220u 7L10V220u PLUG_2mm_11P B11B PH K S OPEN 47 25V0 1 PLUG_2mm_4P B4B PH K S EARPHONE J D3 5 1 2R330 1 2R330 PLUG_2 5mm_4P B4B EH F1A ON TIMER GREEN RED RMT_IN LED GREEN LED RED RMT_FGND 2 4 6 5 3 1 GND NC NC NC 3 3V 10 11 7 5V1 9 8 GND To SPK CABLE 3 SPK R 4 GND 1 GND GND 4 2 TO SoundAMP Unit L OUT 3 R OUT GND...

Page 12: ... 9 49 27WL55A E R T TEXT_SW ...

Page 13: ... AUDIO_GND POWER_SW AUDIO_VCC AUDIO_GND RECTIFIED _MAIN STARTUP_MAIN STARTUP_SUB RECTIFIED _SUB RECTIFIED _SUB RECTIFIED _MAIN VCC_LCD AC_DETECT POWER_LCD 18V POWER_DB PROTECT 40V 3 3V 6 5V3 BL_Vcc BL_GND 5V1 2 B1 2 B1 3 D2 3 D2 3 D2 2 B1 2 D8 1 B2 2 E8 2 D8 3 C8 3 D8 2 C8 2 D8 4 E4 3 A8 3 D8 3 D8 2 C8 2 C8 3 B8 4 D4 PJ62A P812B P813B P805 P804 LE74 CE76 P803A P811B PJ80A OPEN PLUG_3 96mm_5P B5P V...

Page 14: ... C821Z D811 D812 T862 C810 Q801C Q801A L888 L883 C889 C827 C825 C824 C819 C817 C816 Q801 R873 R806 R814 R812 L890 GJ82 RE55 RE53 RE54 R815 D884C Q883 RE83 CE54 C884 LE73 C813 CE53 R874 RE82 R803 R817 R809 C820 R805 5W82 5W82 OPEN OPEN 1 6P27 330 20P5000 SHORT MA8062 M 250V F3 15AL TEM2011AA 47k 330k 22k_F 1 5k_F 1 5k_F 18k_F OPEN OPEN SHORT OPEN SHORT SHORT 39k 1 5k TEM2011AA 35V2200u 1 2R100 1000...

Page 15: ... CE74 CE75 CE82 CE40 CE17 CE09 CE07 DE11 QE53 RE45 RE43 RE18 TE62 RE15 RE29 DE17 RE17 QE01 RE14 QE83 LE52 CE15 LE12 RE05 DE15 GE50 CE50 DE50 CE22 RE44 DE72 RE19 CE21 QE40 DE77B DE07 LE53 25V1800u 25V1800u 50V0 1u OPEN OPEN OPEN 20P5000 20P1000 35V56uF 1 2R220 HEAT SINK FMX 12S 023 OPEN OPEN OPEN TEM2011AA HEAT SINK 1250VH10000p OPEN 250V F3 15AL RN2403 OPEN OPEN OPEN OPEN OPEN OPEN MTZJ6 8B CHIP J...

Page 16: ...8 R855 R857 R851 R852 Q853 R856 R850 D852 R853 Q852 GAP C806 CE02 DE03 DE02 B1000p AC250V1000p AC250V1000p AC250V470p AC250V470p TPW2069AS VR37 225J TRF3253AH 450V220u KETSU OPEN AC275V 0 22u TRF3253AH TPW2070AS TLN3481AA GH TLN3481AA GH OPEN TLN3481AA GH OPEN TLN3481AA GH OPEN 250V4700pF 250V4700pF DLS5D1 O M 0 15W AC275V0 22u TNR15G471K 2SC2412K T6 3A L 250V 2R10k 2R10k 1k D5SB60 4001 FUSE HOLDE...

Page 17: ... 14 49 27WL55A E R T SIGNAL ANALOG IN ...

Page 18: ... 15 49 27WL55A E R T SIGNAL D IN A ...

Page 19: ... 16 49 27WL55A E R T SIGNAL D IN B ...

Page 20: ... 17 49 27WL55A E R T SIGNAL HDMI Link I2C ...

Page 21: ... 18 49 27WL55A E R T SIGNAL HDMI Rx 2 Video Audio ...

Page 22: ... 19 49 27WL55A E R T SIGNAL HDMI Rx 3 PWR Audio ...

Page 23: ... 20 49 27WL55A E R T SIGNAL HDMI AUDIO PLL ...

Page 24: ... 21 49 27WL55A E R T SIGNAL HDMI AUDIO DAC ...

Page 25: ... 22 49 27WL55A E R T SIGNAL HDMI AUDIO OUT ...

Page 26: ... 23 49 27WL55A E R T SIGNAL HDMI CONTROLLER ...

Page 27: ... 24 49 27WL55A E R T SIGNAL EEPROM1 ...

Page 28: ... 25 49 27WL55A E R T SIGNAL EEPROM2 ...

Page 29: ... 26 49 Note For POWER_DB_O L ON line When power is ON GATE is closed until turn ON DB During POD STBY mode it keeping ON but shut off circuit includes into DB 27WL55A E R T SIGNAL MICRO I O ...

Page 30: ... 27 49 402 3A 409 1B 27WL55A E R T SIGNAL OCM MEMORY I F ...

Page 31: ... 28 49 401 1A 409 1B 27WL55A E R T SIGNAL FLASH MEMORY ...

Page 32: ... 29 49 27WL55A E R T SIGNAL SYNC SEPA ...

Page 33: ... 30 49 27WL55A E R T SIGNAL E2P OTHER ...

Page 34: ... 31 49 Note For I2C Bus lines SDA_STBY SCL_STBY Normally connecting to Cortez When POD STBY mode these are connected to DB 27WL55A E R T SIGNAL STD BY MICRO ...

Page 35: ... 32 49 27WL55A E R T SIGNAL CORTEZ REG 1 ...

Page 36: ... 33 49 27WL55A E R T SIGNAL CORTEZ REG 2 ...

Page 37: ... 34 49 27WL55A E R T SIGNAL CORTEZ REG 3 ...

Page 38: ... 35 49 27WL55A E R T SIGNAL BOOT CONFIG ...

Page 39: ... 36 49 27WL55A E R T SIGNAL SERVICE CONNECTOR ...

Page 40: ... 37 49 I2C Bus Switching of Stand By Micom SW1 H at 8V Line Normally Connect to Cortez SW2 L at 8V Line POD STBY state Connect to DB side 27WL55A E R T SIGNAL I2C Switch ...

Page 41: ... 38 49 27WL55A E R T SIGNAL AUDIO 1 2 ...

Page 42: ... 39 49 8 5 5 27WL55A E R T SIGNAL AUDIO 2 2 ...

Page 43: ... 40 49 27WL55A E R T SIGNAL CORTEZ 1 ...

Page 44: ... 41 49 27WL55A E R T SIGNAL CORTEZ 2 ...

Page 45: ... 42 49 27WL55A E R T SIGNAL DDR I F ...

Page 46: ... 43 49 27WL55A E R T SIGNAL DDR SDRAM ...

Page 47: ... 44 49 27WL55A E R T SIGNAL DDR TERMINATION ...

Page 48: ... 45 49 27WL55A E R T SIGNAL DCDC CONV ...

Page 49: ... 46 49 27WL55A E R T SIGNAL LVDS OUT ...

Page 50: ... 47 49 R L U D L L Normal Indication L H Flip Vertical H L Flip Horizontal L L Half Turn 27WL55A E R T SIGNAL LVDS OUT SHARP LCD ...

Page 51: ... 48 49 27WL55A E R T SIGNAL Power Connector and Dimming ...

Page 52: ... 49 49 27WL55A E R T SIGNAL LVDS Power and Others ...

Reviews: