Page 1: Service Manual
TopPage LC-37D90U SERVICE MANUAL No. S56S8LC37D90U LCD COLOR TELEVISION LC-37D90U MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.
Page 2: Table Of Contents
LC-37D90U CONTENTS SAFETY PRECAUTION IMPORTANT SERVICE SAFETY PRE- CAUTION............i PRECAUTIONS A PRENDRE LORS DE LA REPARATION..........ii PRECAUTIONS FOR USING LEAD- FREE SOLDER..........iii CHAPTER 1. SPECIFICATIONS SPECIFICATIONS ........1-1 CHAPTER 2. OPERATION MANUAL OPERATION MANUAL ......
Page 3: Safety Precaution Important Service Safety Pre- Caution
LC-37D90U LC-37D90U SAFETY PRECAUTION Service Manual IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING • Use an AC voltmeter having with 5000 ohm per volt, or higher, sen- sitivity or measure the AC voltage drop across the resistor.
Page 4: Precautions A Prendre Lors De La Reparation
LC-37D90U PRECAUTIONS A PRENDRE LORS DE LA REP- ARATION Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. AVERTISSEMENT • A l'aide de deux fils à pinces, brancher une résistance de 1.5 kΩ 10 watts en parallèle avec un condensateur de 0.15µF en série avec...
Page 5: Precautions For Using Lead- Free Solder
LC-37D90U PRECAUTIONS FOR USING LEAD-FREE SOL- Employing lead-free solder • "PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Page 6: Specifications
* Emergency alert messages via Cable are unreceivable. • As part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specification figures indicated are nominal values of production units.
Page 7: Chapter 2. Operation Manual
LC-37D90U CHAPTER 2. LC-37D90U OPERATION MANUAL Service Manual [1] OPERATION MANUAL 2 – 1...
Page 8 LC-37D90U 2 – 2...
Page 9 LC-37D90U 2 – 3...
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Page 12: Chapter 3. Dimensions
LC-37D90U CHAPTER 3. LC-37D90U DIMENSIONS Service Manual [1] DIMENSIONS Unit: inch/(mm) (671) (104) (122) (930) (822.6) (306) (200) 3 – 1...
Page 13: Chapter 4. Removing Of Major Parts
LC-37D90U CHAPTER 4. LC-37D90U REMOVING OF MAJOR PARTS Service Manual [1] REMOVING OF MAJOR PARTS 1. Detach the SD Card Cover. 2. Remove the 2 lock screws and detach the Stand Cover. 3. Remove the 4 lock screws and detach the Stand.
Page 14 LC-37D90U 6. Remove the Stand Bottom Cover. 7. Disconnect the [FB] connector. Remove the 2 lock screws and detach the Fan Angle C Ass’y. 8. Remove the 4 lock screws and detach the SUS Angle (L)(R). 9. Remove the 5 lock screws and detach the Stand Fixing Angle.
Page 15 LC-37D90U 12.Remove the 3 lock screws and detach the Fan Angle L Ass’y. 13.Remove the 2 lock screws and detach the SP (L) PWB. 14.Remove the 3 lock screws and detach the SP Fixing Angle (L). 15.Remove the 2 lock screws and detach the SP (R) PWB.
Page 16 LC-37D90U 21.Remove the 9 lock screws and detach the Jack Angle Long. 22.Remove the 6 lock screws and detach the POWER PWB. 23.Remove the 6 lock screws and detach the IF PWB. 24.Remove the 5 lock screws and detach the MAIN PWB Radiator and MAIN PWB.
Page 17 LC-37D90U CHAPTER 5. LC-37D90U ADJUSTMENT Service Manual [1] ADJUSTMENT PROCEDURE The adjustment values are set to the optimum conditions at the factory before shipping. If a value should become improper or an adjustment is required due to part replacement, make an adjustment according to the following procedure.
Page 18 LC-37D90U 2. When the formatting is over, the following window appears. Click [OK]. 3. Click [Exit] to finish the formatting. NOTE: When you are done, take out the SD card once to make sure it is finished, and then insert it again.
Page 19 LC-37D90U 5. If any of the procedures fails, the following upgrade failure screen shows up. For the failing procedure, the “NG” marking turns red. NOTE: In such case, try to upgrade the software again. If it still fails, the hardware may be in trouble.
Page 20 LC-37D90U 4. A couple to dozen seconds after the set starts, the upgrade screen below shows up. The upgrade progress is indicated on screen. The power LED indicator goes out once and then starts flashing in blue. (It takes 2-3 minutes to get the monitor microprocessor software upgraded.) 5.
Page 21 LC-37D90U 3. Entering and exiting the adjustment process mode 1) Before entering the adjustment process mode, the AV position RESET in the video adjustment menu. 2) While holding down the “VOL (–)” and "INPUT" keys at a time, plug in the AC cord of the main unit to turn on the power.
Page 22 LC-37D90U 5. List of adjustment process mode menu The character string in brackets [ ] will appear as a page title in the adjustment process menu header. Page Line Item Description Remarks (adjustment detail, etc.) [INFO] MAIN Version Main software version...
Page 23 LC-37D90U Page Line Item Description Remarks (adjustment detail, etc.) [M GAMMA IN] MONITOR GAMMA IN 1 Standard value 1(LEV60050) Adjustment gradation setting. MONITOR GAMMA IN 2 Standard value 2(LEV60066) MONITOR GAMMA IN 3 Standard value 3(LEV60116) MONITOR GAMMA IN 4...
Page 24 LC-37D90U Page Line Item Description Remarks (adjustment detail, etc.) [SOUND 3] SUB_VOLUME_SURROUND SUB_VOLUME_FLAT SUB_VOLUME_EQ SUB_VOLUME_HP SUB_VOLUME_HP_CENTERSP SUB_VOLUME_CENTERSP_EQ SUB_VOLUME_CENTERSP_FLAT BBE_HF_ADJUST BBE_LEVEL BBE_MACH3_F0 BBE_MACH3_Q BBE_MACH3_GAIN [SOUND 4] EQ_MODE PEQ1_F0 PEQ1_Q PEQ1_GAIN PEQ2_F0 PEQ2_Q PEQ2_GAIN PEQ3_F0 PEQ3_Q PEQ3_GAIN PEQ4_F0 PEQ4_Q PEQ4_GAIN [SOUND 5]...
Page 25 LC-37D90U Page Line Item Description Remarks (adjustment detail, etc.) [M OPC3] BRIGHTNESS DA23 BRIGHTNESS DA24 BRIGHTNESS DA25 BRIGHTNESS DA26 BRIGHTNESS DA27 BRIGHTNESS DA28 BRIGHTNESS DA29 BRIGHTNESS DA30 BRIGHTNESS DA31 BRIGHTNESS DA32 [M ADL1] OPC33 ADLEVEL 0 OPC33 ADLEVEL 1 OPC33 ADLEVEL 2...
Page 26 LC-37D90U Page Line Item Description Remarks (adjustment detail, etc.) [M EEP SET] MONITOR TIME OUT MONITOR MAX TEMP MONITOR STANDBY CAUSE [M TESTPTRN] LCD TEST PATTERN [MEMORY CLR] KEY LOCK(1217) KOUTEI AREA ALL CLEAR A MODE AREA CLEAR BACKUP AREA CLEAR...
Page 27: Adjustment Procedure
LC-37D90U 7.3. N358 composite signal adjustment (Tuner) Adjustment item Adjustment conditions Adjustment procedure Adjustment N358 signal Feed the PAL split field color bar signal (75% color saturation) to VIDEO 1 input. Feed the RF signal (by use of US-10ch) to TUNER-A.
Page 28 LC-37D90U Adjustment item Adjustment conditions Adjustment procedure Auto adjustment Page 7/27 Bring the cursor on [•DVI ANALOG] and press [ENTER]. performance [•DVI ANALOG ADJ FINISH] appears when finished. 8. Adjustment of white balance 8.1. White balance adjustment Adjustment item Adjustment conditions...
Page 29 LC-37D90U Level Standard value Adjustment value Tolerance Note Set the following before adjustment. AV MODE: [DYNAMIC] Monochrome: ON Aging Time: 60 Min. 8.2. Adjusting procedure by use of [RS-232C] 1. Get ready the PC with COM port (RS-232C) running on Windows 95/98/ME/2000/XP operating system, as well as the RS-232C cross cable.
Page 30 LC-37D90U 8.3. White balance adjustment sequence Adjustment is available in any input or position. There is no specific order to adjust high and low, either. Activate process command (STEP1). KRSW0001 Command is accepted. Activate process command (STEP2). KKT10037 Process command is activated.
Page 31 LC-37D90U Start of measurement Adjust RB to the target xy values. MG5RXXXX MG5BXXXX * XXXX indicates adjustment values between 0000 - 1023 (4 digit decimal number with zero fill). * G is fixed. Repeat until values are * Default adjustment value of RGB is the parameter value of LEV5 command multiplied by 4.
Page 32 LC-37D90U Start of measurement Adjust RB to the target xy values. MG2RXXXX MG2BXXXX * XXXX indicates adjustment values between 0000 - 1023 (4 digit decimal number with zero fill). * G is fixed. * Default adjustment value of RGB is the parameter value of LEV2 command multiplied by 4.
Page 33: Major Ic Informations
LC-37D90U [2] MAJOR IC INFORMATIONS 1. MAJOR IC INFORMATIONS 1.1. IC501 (MM1630CQ) This I2C bus-controlled video switch is designed to switch between one-system color difference (component) signal, one-system S video signal and two-system composite signal. The analog video signal from the INPUT-1 or INPUT-2 input terminal is fed into this IC for selection. The video output signal from this IC flows through a low-pass filter into the video signal processing circuit IC3301 (IXB723WJ).
Page 34 LC-37D90U 1.11. IC8101 (RH-iXB281WJZZQ) This LSI with MPEG-2 system decoder performs back-end processing for digital broadcasting. It is equipped with a CPU (processor core: AM33-3), descrambler (DES), transport stream de-multiplexer, video decoder (MPEG-2 MP@HL compatible), graphic processor, audio decoder (AC3 compati- ble), and an NTSC video encoder.
Page 35 LC-37D90U 2. MAJOR IC INFORMATIONS (BLOCK DIAGRAM AND PIN FUNCTION) 2.1. VHiMM1630CQ-1Q (ASSY: IC501) Video Switch with I2C-bus • Block Diagram [VHiMM1630CQ-1Q (ASSY: IC501)] • Pin Function [VHiMM1630CQ-1Q (ASSY: IC501)] Pin No. Pin Name Pin Function Chroma signal input. SW of S-terminal.
Page 36 LC-37D90U Pin No. Pin Name Pin Function S2-4 Detect of S-terminal. S2-5 S2-1 S2-2 S2-3 Luminance signal input. 8,47,53,57 Vcc Power supply. Slave address select terminal. BIAS Bias. 18,44,62 GND. Detect of D-terminal scanning line. Color difference siganl input. Detect of D-terminal I/P.
Page 37 LC-37D90U 2.2. VHiTA2024++-1Y (ASSY: IC2303) STEREO DIGITAL AUDIO AMPLIFIER • Block Diagram [VHiTA2024++-1Y (ASSY: IC2303)] • Pin Function [VHiTA2024++-1Y (ASSY: IC2303)] Pin No. Pin Name Pin Function DCAP2, Charge pump switching pins. DCAP1 (pin 3) is a free running 300kHz square wave between DCAP1 VDDA and DGND (12Vpp nominal).
Page 38 LC-37D90U 2.3. VHiAN5832SA-1Y (ASSY: IC1401) United States TV SAP SIF_DECODER • Block Diagram [VHiAN5832SA-1Y (ASSY: IC1401)] • Pin Function [VHiAN5832SA-1Y (ASSY: IC1401)] Pin No. Pin Name Pin Function Non connection. WB TIM Wide band timing. WB DET Wide band level sensor input terminal.
Page 39 LC-37D90U 2.4. VHiAK4683EQ-1Q (ASSY: IC1403) Asynchronous Multi-Channel Audio CODEC with DIR/T. • Block Diagram [VHiAK4683EQ-1Q (ASSY: IC1403)] • Pin Function [VHiAK4683EQ-1Q (ASSY: IC1403)] Pin No. Pin Name Pin Function PVDD PLL Power supply, 4.5V~5.5V. Receiver Channel 0 (Internal biased pin. Internally biased at PVDD/2).
Page 40 LC-37D90U Pin No. Pin Name Pin Function Zero Input Detect. When the input data of DAC follow total 8192 LRCK cycles with “0” input data, this pin goes to “H”. And when RSTN1 bit is “0”, PWDA bit is “0”, this pin goes to “H”.
Page 41 LC-37D90U 2.5. VHiNJU26111-1Q (ASSY: IC1406) SOUND_DSP • Block Diagram [VHiNJU26111-1Q (ASSY: IC1406)] • Pin Function [VHiNJU26111-1Q (ASSY: IC1406)] Pin No. Pin Name Pin Function SDO2 Audio Data Output CH2. SDO1 Audio Data Output CH1. SDO0 Audio Data Output CH0. GPIO0 General Purpose IO.
Page 42 LC-37D90U 2.6. VHiTMDS341+-1Y (ASSY: IC1507) 3-TO-1 DVI/HDMI SWITCH • Block Diagram [VHiTMDS341+-1Y (ASSY: IC1507)] • Pin Function [VHiTMDS341+-1Y (ASSY: IC1507)] Pin No. Pin name Pin Function 6, 9, 12, 15 A11, A12, A13, A14 Port1 TMDS positive inputs. 68, 71, 74, 77 A21, A22, A23, A24 Port2 TMDS positive inputs.
Page 43 LC-37D90U 2.7. VHiSii9011L-1Q (ASSY: IC1508) HDMI/DVI Receiver • Block Diagram [VHiSii9011L-1Q (ASSY: IC1508)] • Pin Function [VHiSii9011L-1Q (ASSY: IC1508)] Pin No. Pin Name Pin Function Digital Video Output Pins 92, 93, 94, 95, 96, 99, 100, QE23-0 24-Bit Even Pixel.
Page 44 LC-37D90U Pin No. Pin Name Pin Function DSCL DDC I2C Clock for DDC (5V-tolerant)3. DSDA DDC I2C Data for DDC (5V-tolerant)3. CSCL Configuration I2C Clock (5V-tolerant)3. CSDA Configuration I2C Data (5V-tolerant)3. SCDT Indicates active video at HDMI input port. CI2CA I2C Device Address Select.
Page 45 LC-37D90U 2.8. RH-iXB345WJZZQ (ASSY: IC2002) Monitor microcomputer • Block Diagram [RH-iXB345WJZZQ (ASSY: IC2002)] • Pin Function [RH-iXB345WJZZQ (ASSY: IC2002)] Pin No. Pin Name Pin Function Brightness sensor. CCKM Cable check. AVCC A/D conversion reference voltage (3.3V). Oscillator (32.768kHz) connected. Oscillator (32.768kHz) connected.
Page 46 LC-37D90U Pin No. Pin Name Pin Function MODE2 Input signal state detection. PMUTE Video mute. DDCRST IC1 reset. TVPOW2 LCD TOP PWB 1.2V/2.5V power control. Backlight control. PANEL_POW Panel power control signal. VSH_OUT Panel 3.3V control. MP_CLK 3-wire serial clock.
Page 47 LC-37D90U 2.9. RH-iXB723WJQZQ (ASSY: IC3301) VIDEO_PROCESSER • Pin Function [RH-iXB723WJQZQ (ASSY: IC3301)] Pin No. Pin Name Pin Function Ball Assignments for CPU Host Interface. C11, B11, A11, A12, B12, A_D [7:0] Multiplexed address and data bus with CPU Host Interface.
Page 48 LC-37D90U Pin No. Pin Name Pin Function AG3, AH3, AJ3, AK3, DP_B [19:10] Digital input port B [19:10]. AH4, AG4, AG5, AH5, AJ5, AK5 AK6, AJ6, AH6, AG6, DP_B [9:0] Digital input port B [9:0]. AG7, AH7, AJ7, AK7, AK8,...
Page 49 LC-37D90U Pin No. Pin Name Pin Function MVREF DDR voltage reference. Bank address select. Bank address select. Ball Assignments for Power and Ground. A2, A3, A4, A5, B3, B4, VDDC 1.8V Digital core power. B5, B6, C4, C5, C6, D4,...
Page 50 LC-37D90U Pin No. Pin Name Pin Function AVSS_OUTBUF 3.3V ground for output. AD27, AG27 LVDS_VSSO LVDS out buffer ground. AE24 LVDS_VSSD LVDS Digital ground. AF27 LVDS_VSSA LVDS analog ground. AH27 LVDS_VSSP LVDS PLL ground. AH28 LVDS_VDDP LVDS PLL power. AF28 LVDS_VDDA LVDS analog power.
Page 51 LC-37D90U 2.10. RH-iXB375WJZZQ (ASSY: IC3501, 3502) 128Mbit GDDR SDRAM • Block Diagram [RH-iXB375WJZZQ (ASSY: IC3501, 3502)] • Pin Function [RH-iXB375WJZZQ (ASSY: IC3501, 3502)] Pin No. Pin Name Pin Function 11M, 12M CK, CK*1 The differential system clock Input. All of the inputs are sampled on the rising edge of the clock except DQ’s and DM’s that are sampled on both edges of the DQS.
Page 52 LC-37D90U Pin No. Pin Name Pin Function 7B, 6C, 6B, DQ0 - DQ31 Data inputs/Outputs are multiplexed on the same pins. 5B, 2C, 3D, 2D, 2E, 13K, 12K, 13J, 12J, 13G, 12G, 13F, 12F, 3F, 2F, 3G, 2G, 3J, 2J, 3K, 2K,...
Page 53 LC-37D90U 2.11. RH-iXB281WJ (ASSY: IC8101) MPEG2 System Decoder LSI • Block Diagram [RH-iXB281WJ (ASSY: IC8101)] • Pin Function [RH-iXB281WJ (ASSY: IC8101)] Pin No. Pin Name Pin Function SDAD12 SDRAM address bus. SDAD11 SDAD10 SDAD9 SDAD8 SDAD7 SDAD6 SDAD5 SDAD4 SDAD3...
Page 54 LC-37D90U Pin No. Pin Name Pin Function SDMD63 SDRAM address bus. Dual Data Rate. SDMD62 SDMD61 SDMD60 SDMD59 SDMD58 SDMD57 SDMD56 SDMD55 SDMD54 SDMD53 SDMD52 SDMD51 SDMD50 SDMD49 SDMD48 SDMD47 SDMD46 SDMD45 SDMD44 SDMD43 SDMD42 SDMD41 SDMD40 SDMD39 SDMD38 SDMD37...
Page 55 LC-37D90U Pin No. Pin Name Pin Function SDCLK1 SDRAM clock1. SDCLK0 SDRAM clock0. SDBCLK1 SDRAM clock1 for DDR. SDBCLK0 SDRAM clock0 for DDR. SDCKE SDRAM clock enable. SDCS1_N SDRAM chip select1. SDCS0_N SDRAM chip select0. SDRAS_N SDRAM row address strobe.
Page 56 LC-37D90U Pin No. Pin Name Pin Function SBDAT15 Data. SBDAT14 SBDAT13 SBDAT12 SBDAT11 SBDAT10 SBDAT9 SBDAT8 SBDAT7 SBDAT6 SBDAT5 SBDAT4 SBDAT3 SBDAT2 SBDAT1 SBDAT0 SBWE_N Data write enable. SBOE_M Data output enable. SBCE7_N Chip enable7. SBCE6_N Chip enable6. SBCE5_N Chip enable5.
Page 57 LC-37D90U Pin No. Pin Name Pin Function CBE3_N Bus Command Byte enable. (Not used: Pull-Down) CBE2_N CBE1_N CBE0_N Parity. (Not used: Pull-Down) FRAME_N Cycle Frame. (Not used: Pull-Up) IRDY_N Initiator Ready. (Not used: Pull-Up) TRDY_N Target Ready. (Not used: Pull-Up) DEVSEL_N Device select.
Page 58 LC-37D90U Pin No. Pin Name Pin Function ACLSYC Pin condition control. Shared with UACTS3_N. ACLSDI Serial data input. Shared with UARXD3. ACLSDO Serial data output. Shared with UATXD3. ACLBCLK Bit clock. Shared with UA3EXCLK. TM0EXCLK Timer0 clock. Shared with and PIO26.
Page 59 LC-37D90U Pin No. Pin Name Pin Function TS1DATA7 Transport stream port1 data input (Parallel). TS1DATA6 TS1DATA5 TS1DATA4 TS1DATA3 TS1DATA2 TS1DATA1 TS1DATA0 TS1VALID Transport stream port1 data valid. TS1SYNC Transport stream port1 data sync. TS1ERROR Transport stream port1 data error. TS1CLK Transport stream port1 data clock.
Page 60 LC-37D90U Pin No. Pin Name Pin Function AM32 VIDINCBCR1 External video data CB/CR input1. Shared with DBUGTPC1. AM33 VIDINCBCR0 External video data CB/CR input0. AL23 HDOUT Horizontal sync output. AK24 VDOUT Vertical sync output. AK23 DOUTCLK Display clock output. AK22 DOUTY9 Video Y output9 or Video G output9.
Page 61 LC-37D90U Pin No. Pin Name Pin Function CLKX8 PLL for Audio/Video Decoder. AH30 JTAGTCK Test clock input. AK32 JTAGTDO Test Data output. AJ31 JTAGTDI Test Data input. AL32 JTAGTMS Test mode select. AL33 JTAGTRST_N Test reset. AK33 JTAGGDBGSEL Connected to “H”.
Page 62 LC-37D90U Pin No. Pin Name Pin Function E8, AA6, AC6, AE6, VSS1 VSS for output buffer: 0V. AG28, AG29, AG5, AG6, AH10, AH12, AH14, AH16, AH19, AH21, AH23, AH25, AH27, AH7, AJ8, E20, E24, E27, F10, F12, F14, F16, F19, F21, F23, F25,...
Page 63 LC-37D90U 2.12. RH-iXB024WJZZQ (ASSY: IC8301-4) 256Mb F-die DDR SDRAM • Block Diagram [RH-iXB024WJZZQ (ASSY: IC8301-4)] • Pin Function [RH-iXB024WJZZQ (ASSY: IC8301-4)] Pin No. Pin Name Pin Function 45, 46 CK, CK Clock : CK and CK are differential clock inputs. All address and control input signals are sampled on the positive edge of CK and negative edge of CK.
Page 64 LC-37D90U Pin No. Pin Name Pin Function 2, 4, 5, 7, DQ [0 : 15] Data Input/Output : Data bus. 8, 10, 11, 13, 54, 56, 57, 59, 60, 62, 63, 16, 51 L(U)DQS Data Strobe : Output with read data, input with write data. Edge-aligned with read data, centered in write data.
Page 65 LC-37D90U 2.13. VHiS29GL64A-1Q (ASSY: IC8451) 64-Mbit Page Mode Flash Memory • Block Diagram [VHiS29GL64A-1Q (ASSY: IC8451)] • Pin Function [VHiS29GL64A-1Q (ASSY: IC8451)] Pin No. Pin Name Pin Function 13, 10, 9, 16, 17, A21-A0 22 Address inputs. 48, 1, 2, 3, 4, 5, 6,...
Page 66 LC-37D90U 2.14. RH-iXB323WJZZQ (ASSY: IC8503) IEEE 1394a Link-Layer Controllers • Block Diagram [RH-iXB323WJZZQ (ASSY: IC8503)] • Pin Function [RH-iXB323WJZZQ (ASSY: IC8503)] Pin No. Pin Name Pin Function Audio PLL VCO_CLK Input from VCO. This is used to generate internal audio clocks for receive clock recovery.
Page 67 LC-37D90U Pin No. Pin Name Pin Function JTAG_TCK JTAG Test Clock pin. JTAG_TRSTn JTAG Reset pin. Active Low only. MCIF Interface (PCI, 68K and SRAM-Like Interface MCIF_SEL1 Microcontroller Interface Select. This pin is sampled at power-up and reset. MCIF_SEL [1: 0].
Page 68 LC-37D90U Pin No. Pin Name Pin Function DMAREQ_CH0n External DMA Request Signal-Channel 0. The RH-IXB323WJZZ will drive this signal low when it is ready for the system DMA controller. This signal is hi-Z when not driven low. DMAACK_CH0n External DMA Acknowledge Signal-Channel 0. The system DMA controller will drive this high when it has received DMAREQ_CH0n signal and is ready to transfer data.
Page 69 LC-37D90U Pin No. Pin Name Pin Function HSDI1_DVALIDz HSDI port 1 data Valid pin. This pin indicates if data on the HSDI data bus is valid for reading or writ- (HSDI1_Enz) ing. For transmit onto 1394, this signal is input to the RH-IXB323WJZZQ by the system with the data.
Page 70 LC-37D90U Pin No. Pin Name Pin Function GPIO2 GPIO. Output is controlled by the internal register. Input is monitored by internal register. Can be used as watermark for also buffer 1. GPIO3 GPIO. Output is controlled by the internal register. Input is monitored by internal register.
Page 71 LC-37D90U 2.15. RH-iXB684WJQZQ (ASSY: IC8601) DEMODULATOR • Block Diagram [RH-iXB684WJQZQ (ASSY: IC8601)] • Pin Function [RH-iXB684WJQZQ (ASSY: IC8601)] Pin No. Pin Name Pin Function Analog to Digital Converter (ADC) Interface ADC_INN ADC negative differential input. ADC_INP ADC positive differential input.
Page 72 LC-37D90U Pin No. Pin Name Pin Function 8, 13, 16, 18, AGND Analog Ground. 19, 21, 24, 29, 30, 124 20, 23, 27, 28 AVDD Analog power. (1.8V) 12, 15 AVDD_ADC ADC analog power. (1.8V) AVDD_OSC Oscillator analog power. (1.8V) AVDD_PLL PLL analog power.
Page 73 LC-37D90U 2.16. VHiTC6384AF1EQ (ASSY: IC8702) SD_CARD_CONTROLER • Pin Function [VHiTC6384AF1EQ (ASSY: IC8702)] Pin No. Pin Name Pin Function Host interface Chip select (accessible in #CS= “0”). 98, 97, 94, A [7:0] Address bit 7-0. 93, 88, 85, 82, 77 13, 11, 10, D [15:1] Data bit [15:0].
Page 74 LC-37D90U Pin No. Pin Name Pin Function LED2 LED output terminal for debugging. It is controlled by an internal register and it synchronizes with the operation of SD2. LED1 LED output terminal for debugging. It is controlled by an internal register and it synchronizes with the operation of SD1.
Page 75 LC-37D90U 2.17. RH-iXB732WJQZQ (ASSY: IC9101) CPLD • Block Diagram [RH-iXB732WJQZQ (ASSY: IC9101)] • Pin Function [RH-iXB732WJQZQ (ASSY: IC9101)] Pin No. Pin Name Pin Function ED16 SBDAT0. ED17 SBDAT1. ED18 SBDAT2. ED19 SBDAT3. ED20 SBDAT4. ED21 SBDAT5. ED22 SBDAT6. ED23 SBDAT7.
Page 76 LC-37D90U Pin No. Pin Name Pin Function Ground. PWB_VER1 PWB ID. CLK33MB Clock (33MHz). Power Supply. N_SRESET System Reset. Ground. PWB_VER0 PWB ID. HDMI_HPG1 HDMI_HPG2 HDMI_HPG3 HDMI_RST HDMI_SW_EMP HDMI_INT HDMI_SW_OE HDMI_SEL1 HDMI_SEL2 HDMI_SEL3 HDMI_PLG_EN HDMI_WP Ground. Power Supply. HP_WATCH EX Model Control Line.
Page 77 LC-37D90U 2.18. VHiTPS40055-1Y (ASSY: IC9603, 9606, 9607) DC/DC CONVERTER • Block Diagram [VHiTPS40055-1Y (ASSY: IC9603, 9606, 9607)] • Pin Function [VHiTPS40055-1Y (ASSY: IC9603, 9606, 9607)] Pin No. Pin Name Pin Function BOOST Gate drive voltage for the high side N-channel MOSFET.
Page 78 LC-37D90U 2.19. 95KUCY0273AY (ASSY: IC4701) HIGH VOLTAGE RESONANT CONTROLLER (E-L6598D13TR) • Block Diagram [95KUCY0273AY (ASSY: IC4701)] • Pin Function [95KUCY0273AY (ASSY: IC4701)] Pin No. Pin Name Pin Function Soft Start Timing Capacitor. Rfstart Soft Start Frequency Setting - Low Impedance Voltage Source - See also Cf.
Page 79 LC-37D90U MEMO 5 – 63...
Page 80: Chapter 6. Trouble Shooting Table
LC-37D90U CHAPTER 6. LC-37D90U TROUBLE SHOOTING TABLE Service Manual [1] TROUBLE SHOOTING TABLE <Power Supply> No power supply (Front LED does not light up) and no power-up even if turned on(Front LED light up to green) Is the AC power cord plugged in? Plug in the AC power cord and turn on the power.
Page 81 L C - 3 7 D 9 0 U Check D4705 and D4706 for defects. Check the primary-side parts for defects. See if the second- ary output is short-circuited. Is there the PNL12V output? Is PNL_POW (pin (4) of CN5702) at High (about 3.3V)? Check the PNL12V series regulator Check the main unit for trou- circuit.
Page 82 LC-37D90U No video (1) COMPOSITE: No external input video COMPOSITE: No external input video S-VIDEO: No external input video [INPUT-2] [INPUT-1] [INPUT-2] Is INPUT-1 selected on the input select Is INPUT-2 selected on the input select Is INPUT-2 selected on the input select menu...
Page 83 LC-37D90U [COMPOSITE signal input] Is there the COMPOSITE video signal input at pins (M4, N4) of IC3301 (VPC)? Check the line between SC1101 and IC3301 (Q2201 thru Q2203, [S-VIDEO signal input] Is there the video signal input at pins (M4, N4)(Y) and (T1)(C) of IC3301 (VPC)? Q2205, Q2207.
Page 84 LC-37D90U No video (2) COMPONENT: No external input video No video at UHF/VHF broadcast signal recep- No video at digital broadcast signal reception [INPUT-1] tion Is INPUT-1 selected on the input select Is the specified TV signal selected on the input select menu screen?
Page 85 LC-37D90U Is there the COMPONENT video signal out- Check the line between IC1103 Are there the MVY[7:0], MVC[7:0] and MVCLK/ put at pins (2), (4) and (6) of connector and IC3301 (Q2204, Q2208, MNSYNCO/MVSYNCO signal outputs from (SC501) on the IF unit? etc.).
Page 86 LC-37D90U <HDMI signal input> No video (3) No external input video [INPUT-3] No external input video [INPUT-4] Is INPUT-3 selected on the input select menu screen? Is INPUT-4 selected on the input select menu screen? Select INPUT-3 on the input select menu screen for the Select INPUT-4 on the input select menu screen for the right input signal.
Page 87 LC-37D90U Does the signal come from connector (SC1501) to the input pins (48 and Does the signal come from connector (SC1502) to the input pins (67 49) (CLK±), (51 and 52) (D0±), (54 and 55) (D1±), and (57 and 58) and 68) (CLK±), (70 and 71) (D0±), (73 and 74) (D1±), and (76 and 77)
Page 88 LC-37D90U <DVI signal input> No video (4) No external digital input video [INPUT-5] No external analog input video [INPUT-5] Is INPUT-5 selected on the input select menu screen? Is INPUT-5 selected on the input select menu screen? Select INPUT-5 on the input select menu screen for Select INPUT-5 on the input select menu screen for the the right input signal (AUTO or DIGITAL).
Page 89 LC-37D90U Is IC1505 (EEPROM) accessed by I2C, with DVI connected, to read the DDC_I2C CLOCK/DATA data? Does the signal come from pins (34 and 35) (CLK±), (31 and 32) Check the DDC line and its peripheral circuits (IC1505 (D0±), (28 and 29) (D1±), and (25 and 26) (D2±) of IC1507 to pins (EEPROM) and its peripherals).
Page 90 LC-37D90U No audio (1) [With HDMI connected] No audio (2) [Audio signal] INPUT-4 No audio (HDMI analog [Audio signal] INPUT-3 No audio (HDMI [Audio signal] INPUT-1 No audio input) connected) [Audio signal] INPUT-5 No audio (DVI analog [Audio signal] INPUT-4 No audio (HDMI...
Page 91 LC-37D90U Check the SC502 and SC1102 connectors. Check the line between IC1508 and IC1403 and their peripheral circuits. [INPUT-1] Does the audio signal come from pins (2) and (4) of SC1102 to pins (53)(L) and (54)(R) of IC1403 (CODEC)? [INPUT-2] Does the audio signal come from...
Page 92 LC-37D90U No audio (4) No audio at digital broadcast No audio at UHF/VHF broad- signal reception cast signal reception Move the sound volume key. Set the audio output to Is the audio output selected for Set the audio output to Does the volume icon indicate “FIXED”.
Page 93 LC-37D90U Are the audio signal inputs at Check the line between pins (61)(L) and (62)(R) of IC8801 and IC1403, and IC1403? their peripheral circuits. Are the audio signal outputs Check IC1403 and its at pins (38)(L) and (39)(R) of peripheral circuits.
Page 94 LC-37D90U No audio signal at DIGITAL AUDIO OUTPUT terminal (Analog sound heard) No INPUT-3/4 (HDMI) audio No audio at digital broadcast signal reception If no video appears, refer Are there the IF_OUT_N Check the tuner to “No external input video...
Page 95 LC-37D90U Is the audio output from the Check the bus line monitor set at “VARIABLE” (SCL0/SDA0_5) and or “FIXED” on the menu IC1403. Replace as screen? required. Is there the MUTE signal Check the input at pin (2) of IC1408? MUTE_A_ALL and ACDET_MUTE signals.
Page 96 LC-37D90U LED flashing timing chart for error notification. 250ms 1sec 1) Red power LED Remarks Error type Power red LED operation (1 cycle) Pins are microprocessor pins. Lamp failure ERR_PNL (pin 73 of IC2002): Abnormal L. Confirmed after 5 Flashes once: Fast L: Off...
Page 97 LC-37D90U Basically, communication logs are analyzed by a bus Error type Power red LED operation (1 cycle) monitor or debug print logs are analyzed. Time-out setting reception failu Time-out setting and start-up mode change cannot be H: On Start-up confirmation reception failure received from the main CPU.
Page 98: Chapter 7. Overall Wiring/Block Dia
LC-37D90U CHAPTER 7. LC-37D90U OVERALL WIRING/BLOCK DIAGRAM Service Manual [1] OVERALL WIRING DIAGRAM 7 – 1...
Page 99 LC-37D90U 7 – 2...
Page 100: System Block Diagram
LC-37D90U [2] SYSTEM BLOCK DIAGRAM 7 – 3...
Page 101 LC-37D90U 7 – 4...
Page 102: Main Block Diagram
LC-37D90U [3] MAIN BLOCK DIAGRAM 7 – 5...
Page 103 LC-37D90U 7 – 6...
Page 104: Power Block Diagram
LC-37D90U [4] POWER BLOCK DIAGRAM 7 – 7...
Page 105 LC-37D90U 7 – 8...
Page 106: Chapter 8. Schematic Diagram
LC-37D90U CHAPTER 8. LC-37D90U SCHEMATIC DIAGRAM Service Manual [1] DESCRIPTION OF SCHEMATIC DIA- GRAM 1. VOLTAGE MEASUREMENT CONDITION: 1) The voltages at test points are measured on exclusive AC adaptor and the stable supply voltage of AC 120V. Signals are fed by a color bar signal generator for servicing purpose and the above volt- ages are measured with a 20k ohm/V tester.
Page 107: R/C, Led Unit
LC-37D90U [2] R/C, LED Unit 8 – 2...
Page 108: If Unit
LC-37D90U [3] IF Unit • IF Unit-1/2 8 – 3...
Page 109 LC-37D90U 8 – 4...
Page 110 LC-37D90U • IF Unit-2/2 8 – 5...
Page 111 LC-37D90U 8 – 6...
Page 112: Main Unit
LC-37D90U [4] MAIN Unit • MAIN Unit-1/23 8 – 7...
Page 113 LC-37D90U 8 – 8...
Page 114 LC-37D90U • MAIN Unit-2/23 8 – 9...
Page 115 LC-37D90U 8 – 10...
Page 116 LC-37D90U • MAIN Unit-3/23 8 – 11...
Page 117 LC-37D90U 8 – 12...
Page 118 LC-37D90U • MAIN Unit-4/23 8 – 13...
Page 119 LC-37D90U 8 – 14...
Page 120 LC-37D90U • MAIN Unit-5/23 8 – 15...
Page 121 LC-37D90U 8 – 16...
Page 122 LC-37D90U • MAIN Unit-6/23 8 – 17...
Page 123 LC-37D90U 8 – 18...
Page 124 LC-37D90U • MAIN Unit-7/23 8 – 19...
Page 125 LC-37D90U 8 – 20...
Page 126 LC-37D90U • MAIN Unit-8/23 8 – 21...
Page 127 LC-37D90U 8 – 22...
Page 128 LC-37D90U • MAIN Unit-9/23 8 – 23...
Page 129 LC-37D90U 8 – 24...
Page 130 LC-37D90U • MAIN Unit-10/23 8 – 25...
Page 131 LC-37D90U 8 – 26...
Page 132 LC-37D90U • MAIN Unit-11/23 8 – 27...
Page 133 LC-37D90U 8 – 28...
Page 134 LC-37D90U • MAIN Unit-12/23 8 – 29...
Page 135 LC-37D90U 8 – 30...
Page 136 LC-37D90U • MAIN Unit-13/23 8 – 31...
Page 137 LC-37D90U 8 – 32...
Page 138 LC-37D90U • MAIN Unit-14/23 8 – 33...
Page 139 LC-37D90U 8 – 34...
Page 140 LC-37D90U • MAIN Unit-15/23 8 – 35...
Page 141 LC-37D90U 8 – 36...
Page 142 LC-37D90U • MAIN Unit-16/23 8 – 37...
Page 143 LC-37D90U 8 – 38...
Page 144 LC-37D90U • MAIN Unit-17/23 8 – 39...
Page 145 LC-37D90U 8 – 40...
Page 146 LC-37D90U • MAIN Unit-18/23 8 – 41...
Page 147 LC-37D90U 8 – 42...
Page 148 LC-37D90U • MAIN Unit-19/23 8 – 43...
Page 149 LC-37D90U 8 – 44...
Page 150 LC-37D90U • MAIN Unit-20/23 8 – 45...
Page 151 LC-37D90U 8 – 46...
Page 152 LC-37D90U • MAIN Unit-21/23 8 – 47...
Page 153 LC-37D90U 8 – 48...
Page 154 LC-37D90U • MAIN Unit-22/23 8 – 49...
Page 155 LC-37D90U 8 – 50...
Page 156 LC-37D90U • MAIN Unit-23/23 8 – 51...
Page 157 LC-37D90U 8 – 52...
Page 158: Key Unit
LC-37D90U [5] KEY Unit 8 – 53...
Page 159: Speaker Terminal-L Unit
LC-37D90U [6] SPEAKER TERMINAL-L Unit [7] SPEAKER TERMINAL-R Unit 8 – 54...
Page 160: Chapter 9. Printed Wiring Board Assemblies
LC-37D90U CHAPTER 9. LC-37D90U PRINTED WIRING BOARD ASSEMBLIES Service Manual [1] IF Unit IF Unit (Side-A) 9 – 1...
Page 161 LC-37D90U J502 J501 C528 C532 D514 D513 D512 R542 R606 R568 R567 C544 R601 C545 R607 C543 R608 R551 C533 R609 R552 R554 R604 R553 IC501 R555 R566 C534 C536 D519 R603 C535 R565 R564 C537 R556 C541 R557 R602...
Page 162: Main Unit
LC-37D90U [2] MAIN Unit MAIN Unit (Side-A) 9 – 3...
Page 163 LC-37D90U 9 – 4...
Page 164 LC-37D90U P2601 P9002 P2603 P2602 R2611 R2612 R2613 C9601 R9623 C9604 R9627 R9611 R3515 R9612 R3522 Q9607 C9603 C2601 C9613 IC9603 L9602 R9617 R9649 IC3501 C9602 R9614 C3501 FB3501 R9621 R3538 R3531 C9621 C3429 C9652 IC3302 L9604 L9603 C9654 C9617...
Page 165 LC-37D90U C1301 R1310 LUG1102 P9701 P9702 R2613 IC1301 C1305 FDC1 C9701 R1319 FB9702 R1321 R9624 9602 R1320 C1306 C9609 D1403 R1407 C1422 C9619 C9615 L9601 C1302 R1439 C1421 R1427 D1401 Q9602 Q1402 C1418 Q9606 C1416 C1417 IC9602 L9603 D1305 C1414...
Page 166 LC-37D90U MAIN Unit (Side-B) 9 – 7...
Page 167 LC-37D90U 9 – 8...
Page 168 LC-37D90U TL9701 TL9714 TL2622 TL2619 TL2621 TL9719 TL9713 R9008 TL9712 TL9718 TL9708 TL9715 TL9711 TL9717 TL9702 TL9703 TL9716 TL9710 TL9705 TL9707 TL9706 R9003 R1303 TL9709 Q1301 R9628 R8811 R9705 R1306 C9715 R8808 R9629 FDC2 R1307 C9635 D9701 C9628 C8811 TL9724...
Page 169 LC-37D90U TL2635 TL2632 TL2633 TP2602 TL2622 TL2619 TL2621 TL2610 TL2609 IC9003 TL2636 TL2634 TL2623 TL2628 R9008 TL2638 TL2630 TL2637 TL9004 TP2601 TL9046 TL9045 TL9017 TL9015 TL2642 TL2624 TL2627 TL2626 TL2625 TL2647 TL2643 TL2639 TL2631 TL2629 C9002 R9003 TL9047 TL2645 TL2644...
Page 170: R/C, Led Unit
LC-37D90U [3] R/C, LED Unit R/C, LED Unit (Side-A) C101 P101 D102 D103 RMC101 R104 IC101 Q101 SLD101 Q103 R102 R105 R112 Q102 D101 C104 R109 R/C, LED Unit (Chip Parts Side-A) [4] KEY Unit KEY Unit (Side-A) 9 – 11...
Page 171: Speaker Terminal-L Unit
LC-37D90U [5] SPEAKER TERMINAL-L Unit SPEAKER TERMINAL-L Unit (Side-A) SPEAKER TERMINAL-L Unit (Side-B) [6] SPEAKER TERMINAL-R Unit SPEAKER TERMINAL-R Unit (Side-A) SPEAKER TERMINAL-R Unit (Side-B) 9 – 12...
Page 172 LC-37D90U MEMO 9 – 13...
Page 173: Parts Guide
LC-37D90U PartsGuide PARTS GUIDE No. S56S8LC37D90U Note: The reference numbers on the PWB are arranged in alphabetical order. LC-37D90U Please exchange MAIN unit, when you MODEL exchange IC8301, IC8302, IC8303, IC8304 and IC8453. CONTENTS PRINTED WIRING BOARD TERMINAL-L Unit) ASSEMBLIES (NOT...
Page 174 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] PRINTED WIRING BOARD ASSEMBLIES (NOT REPLACEMENT ITEM) R/C, LED Unit DUNTKD641FM10 IF Unit DUNTKD643FM11 KEY Unit DUNTKD716FM06 MAIN Unit DKEYDD743FM21 SPEAKER TERMINAL-L Unit DUNTKD744WE01 DUNTKD745WE01 SPEAKER TERMINAL-R Unit POWER Unit...
Page 175 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] DUNTKD643FM11 (IF Unit) C2703 Capacitor, 0.1 25V Ceramic VCKYCY1EF104ZY C2704 Capacitor, 2200p 50V Ceramic VCKYCY1HB222KY C2705 Capacitor, 2200p 50V Ceramic VCKYCY1HB222KY C2706 Capacitor, 1 25V Ceramic RC-KZA104WJZZY C2707 Capacitor, 1 25V Ceramic...
Page 176 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] DUNTKD643FM11 (IF Unit) FB2711 Ferrite core RBLN-0064TAZZY FB2712 Ferrite core RBLN-0064TAZZY FB7502 Ferrite core RBLN-0060TAZZY FB7504 Ferrite core RBLN-0060TAZZY FB7506 Ferrite core RBLN-0252TAZZY IC501 VHiMM1630CQ-1Q IC, MM1630CQ IC2701 IC, TA2024...
Page 177 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] DUNTKD643FM11 (IF Unit) R584 Resistor, 0 1/16W Metal Oxide VRS-CY1JF000JY R585 Resistor, 1k 1/16W Metal Oxide VRS-TV1JD102JY R586 Resistor, 82 1/16W Metal Oxide VRS-CY1JF820JY R587 Resistor, 560 1/16W Metal Oxide...
Page 178 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C1301 Capacitor, 0.1 25V Ceramic VCKYCZ1EF104ZY C1302 Capacitor, 470 16V Capacitor(AL) VCERMZ1CN477MY C1303 Capacitor, 4.7 10V Ceramic RC-KZA069WJZZY C1304 Capacitor, 1 10V Ceramic VCKYCY1AB105KY C1305 Capacitor, 0.1 25V Ceramic...
Page 179 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C1517 Capacitor, 10 16V Ceramic RC-KZA237WJZZY C1518 Capacitor, 10 16V Ceramic RC-KZA237WJZZY C1519 Capacitor, 0.1 25V Ceramic VCKYCZ1EF104ZY C1520 Capacitor, 0.1 25V Ceramic VCKYCZ1EF104ZY C1521 Capacitor, 47p 50V Ceramic...
Page 180 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C1602 Capacitor, 10 16V Ceramic RC-KZA237WJZZY C1603 Capacitor, 0.1 25V Ceramic VCKYCZ1EF104ZY C1604 Capacitor, 0.1 25V Ceramic VCKYCZ1EF104ZY C1605 Capacitor, 1000p 50V Ceramic VCKYCZ1HB102KY C1606 Capacitor, 0.1 25V Ceramic...
Page 181 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C3330 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C3331 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C3332 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C3333 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C3334 Capacitor, 0.1 10V Ceramic...
Page 182 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C3418 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C3419 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C3420 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C3421 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C3422 Capacitor, 0.1 10V Ceramic...
Page 183 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C8143 Capacitor, 0.1 25V Ceramic VCKYCZ1EF104ZY C8144 Capacitor, 10 6.3V Ceramic RC-KZ0124TAZZY C8145 Capacitor, 4.7 10V Ceramic RC-KZA069WJZZY C8146 Capacitor, 0.01 25V Ceramic VCKYCZ1EB103KY C8147 Capacitor, 4.7 10V Ceramic...
Page 184 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C8508 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C8510 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C8511 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C8512 Capacitor, 10 16V Ceramic RC-KZA237WJZZY C8513 Capacitor, 0.1 10V Ceramic...
Page 185 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C8656 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C8657 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C8658 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C8659 Capacitor, 0.1 10V Ceramic VCKYCZ1AB104KY C8660 Capacitor, 0.1 10V Ceramic...
Page 186 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) C9640 Capacitor, 8200p 25V Ceramic VCKYCZ1EB822KY C9641 Capacitor, 6800p 25V Ceramic VCKYCZ1EB682KY C9642 Capacitor, 220p 50V Ceramic VCKYCZ1HB221KY C9643 Capacitor, 2700p 50V Ceramic VCKYCZ1HB272KY C9644 Capacitor, 100p 50V Ceramic...
Page 187 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) D9611 Diode, 1SS355TE-17 VHD1SS355//-1Y D9612 Diode, 1SS355TE-17 VHD1SS355//-1Y D9701 Diode, 1SS355TE-17 VHD1SS355//-1Y D9702 Diode, 1SS355TE-17 VHD1SS355//-1Y FB1301 Ferrite core RBLN-0237TAZZY FB1402 RBLN-A191WJZZY Ferrite core FB1405 Ferrite core...
Page 188 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) IC1507 IC, TMDS341PFCR VHiTMDS341+-1Y IC1508 IC, Sil9011CLU VHiSii9011L-1Q IC2001 IC, BD5224G-TR VHiBD5224G+-1Y IC2002 IC, HD64F36049HV RH-iXB345WJNDQ IC2003 IC, TC7W66FU(TE12L,F) VHiTC7W66U/-1Y IC2004 VHiBR24L08F-1Y IC, BR24L08F-WE2 IC2005 IC, M62332FPCF5J...
Page 189 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) L3304 Coil, Peaking 2.2µH VPCEM2R2MR23NY L3305 Coil, Peaking 2.2µH VPCEM2R2MR23NY L3306 Coil, Peaking 2.2µH VPCEM2R2MR23NY L3307 Coil, Peaking 2.2µH VPCEM2R2MR23NY L8501 Coil RCiLFA122WJZZY L8502 RCiLFA122WJZZY Coil L8601 Coil, Peaking 0.39µH...
Page 190 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) Q9604 Transistor, DTC144EETL VSDTC144EE/-1Y Q9605 Transistor, DTC144EETL VSDTC144EE/-1Y Q9606 Transistor, DTC144EETL VSDTC144EE/-1Y Q9607 Transistor, DTC144EETL VSDTC144EE/-1Y Q9608 Transistor, SP8K2TB VSSP8K2++++-1Y Q9609 VS2SC3928AR-1Y Transistor, 2SC3928A-T112-1R Q9701 Transistor, KRC103S-RTK/P...
Page 191 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R1436 Resistor, 47k 1/16W Metal Oxide VRS-CZ1JF473FY R1437 Resistor, 22 1/16W Metal Oxide VRS-CZ1JF220JY R1438 Resistor, 22 1/16W Metal Oxide VRS-CZ1JF220JY R1439 Resistor, 22k 1/16W Metal Oxide...
Page 192 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R1555 Resistor, 10k 1/16W Metal Oxide VRS-CZ1JF103FY R1556 Resistor, 47k 1/16W Metal Oxide VRS-CZ1JF473FY R1557 Resistor, 10k 1/16W Metal Oxide VRS-CZ1JF103FY R1559 Resistor, 10k 1/16W Metal Oxide...
Page 193 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R2010 Resistor, 33k 1/16W Metal Oxide VRS-CJ1JF333JY R2011 Resistor, 4.7k 1/16W Metal Oxide VRS-CZ1JF472JY R2012 Resistor, 10 1/16W Metal Oxide VRS-CZ1JF100JY R2013 Resistor, 10 1/16W Metal Oxide...
Page 194 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R3308 Resistor, 4.7k 1/16W Metal Oxide VRS-CZ1JF472JY R3309 Resistor, 470 1/16W Metal Oxide VRS-CZ1JF471JY R3310 Resistor, 4.7k 1/16W Metal Oxide VRS-CZ1JF472JY R3311 Resistor, 10k 1/16W Metal Oxide...
Page 195 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R3550 Resistor, 68 1/16W Metal Composition VRK-CD1JJ680JY R3552 Resistor, 68 1/16W Metal Oxide VRS-CZ1JF680JY R3553 Resistor, 68 1/16W Metal Oxide VRS-CZ1JF680JY R3554 Resistor, 68 1/16W Metal Composition...
Page 196 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R8163 Resistor, 68 1/16W Metal Composition VRK-CD1JJ680JY R8164 Resistor, 47 1/16W Metal Oxide VRS-CZ1JF470JY R8165 Resistor, 47 1/16W Metal Oxide VRS-CZ1JF470JY R8166 Resistor, 22 1/16W Metal Oxide...
Page 197 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R8375 Resistor, 68 1/16W Metal Oxide VRS-CH1JF680JY R8376 Resistor, 22 1/16W Metal Oxide VRS-CZ1JF220JY R8377 Resistor, 22 1/16W Metal Oxide VRS-CZ1JF220JY R8378 Resistor, 22 1/16W Metal Oxide...
Page 198 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R8539 Resistor, 10k 1/16W Metal Oxide VRS-CZ1JF103FY R8540 Resistor, 10k 1/16W Metal Oxide VRS-CZ1JF103FY R8541 Resistor, 4.7k 1/16W Metal Oxide VRS-CZ1JF472JY R8542 Resistor, 4.7k 1/16W Metal Oxide...
Page 199 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R8714 Resistor, 10k 1/16W Metal Oxide VRS-CZ1JF103FY R8715 Resistor, 10k 1/16W Metal Oxide VRS-CZ1JF103FY R8716 Resistor, 10k 1/16W Metal Oxide VRS-CZ1JF103FY R8717 Resistor, 10k 1/16W Metal Oxide...
Page 200 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) R9334 Resistor, 4.7k 1/16W Metal Oxide VRS-CZ1JF472JY R9336 Resistor, 4.7k 1/16W Metal Oxide VRS-CZ1JF472JY R9339 Resistor, 4.7k 1/16W Metal Oxide VRS-CZ1JF472JY R9341 Resistor, 4.7k 1/16W Metal Oxide...
Page 201 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] DKEYDD743FM21 (MAIN Unit) X1401 Crystal, 12.288MHz RCRSCA045WJZZY X1402 Crystal, 36.864MHz RCRSCA090WJZZY X1501 Crystal, 28.322MHz RCRSCA108WJZZY X3301 Crystal, 14.31818MHz RCRSC0170TAZZY X8402 Crystal, 27MHz RCRSZA008WJZZY X8501 RCRSCA071WJZZY Crystal, 24.576MHz X8601 Crystal, 25.140MHz...
Page 202 LC-37D90U [9] CABINET AND MECHANICAL PARTS 67 73 15-1 15-2 74-2 74-1 74-1-6 74-1-2 74-1-5 74-1-1 74-1-3 74-1-4 74-1-3 74-1-6 18-3 18-1 17-3 18-2 18-4 18-2 16-1 17-4 17-1 17-2 62 46 16-2...
Page 203 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [9] CABINET AND MECHANICAL PARTS Front Cabinet Ass'y CCABAB315WJ01 Front Cabinet Not Available LED Cover GCOVAB501WJSA Badge, SHARP Not Available Decoration Plate HDECCA010WJSA Spacer, x2 PSPAHA416WJZZ Spacer, x2 PSPAHA801WJZZ Rear Cabinet Ass'y...
Page 204 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [9] CABINET AND MECHANICAL PARTS Connecting Cord (LA:POW-INV1,3) QCNW-E439WJQZ Connecting Cord (LP:MAIN-LCDCONT) QCNW-E503WJQZ Connecting Cord (COAXIAL:IF-MAIN) QCNW-E513WJPZ Connecting Cord (LB:MAIN-INV3) QCNW-E516WJQZ Connecting Cord (PD+PE:MAIN-POW) QCNW-E517WJQZ QCNW-E519WJQZ Connecting Cord (FD:MAIN-POW) Connecting Cord (RA:LED-IF)
Page 205 LC-37D90U [11] PACKING PARTS (NOT REPLACEMENT ITEM) PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [11] PACKING PARTS (NOT REPLACEMENT ITEM) Packing Case SPAKCC517WJZZ Stand Sheet SPAKFA977WJZZ Wrapping Paper (Monitor) SPAKPA338WJZZ Wrapping Paper (Stand) SPAKPA487WJZZ SPAKXB057WJZZ Packing Add. (Top) (Bottom) SPAKXB058WJZZ Packing Add.
Page 206 LC-37D90U PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [12] SERVICE JIGS (USE FOR SERVICING) 80pins FFC L=1000mm Pitch=0.5mm, x2used QCNW-C222WJQZ LCD Controller Unit to LCD Panel RCA Cable L=1500mm, Tuner Extension QCNW-C799WJPZ 41pins L=400mm (LV) QCNW-E134WJPZ 12-14pins L=1000mm (LA)
Page 207 LC-37D90U MEMO © COPYRIGHT XXXX BYSHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.
Page 208 LC-37D90U COPYRIGHT 2006 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

Sharp LC-37D90U Service Manual

Safety Precaution Important Service Safety Pre- Caution

Chapter 1 . Specifications

Chapter 2. Operation Manual

Chapter 3. Dimensions

Chapter 4. Removing of Major Parts

Chapter 5 . Adjustment

Chapter 6. Trouble Shooting Table

Chapter 7. Overall Wiring/Block Dia

Chapter 8. Schematic Diagram

Chapter 9. Printed Wiring Board Assemblies

Parts Guide

Quick Links

SERVICE MANUAL

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Summary of Contents for Sharp LC-37D90U

Table of Contents