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Elenberg LVD-1902 Service Manual

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Elenberg LVD-1902 SERVICE MANUAL
CONTENT
Brief Introduction Of The LVD-1902
PART 1：
◆
◆
Exploded View
PART 2:
Key Ics And Assemblies
PART 3：
Detailed Circuit
PART 4:
◆
◆
◆
Parts List
PART 5:
Debug Procedure
PART6:
Schematic Diagram
Printed Circuit
Main Board
DVD Board
HI-voltage Board

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Summary of Contents for Elenberg LVD-1902

  • Page 1 Elenberg LVD-1902 SERVICE MANUAL CONTENT Brief Introduction Of The LVD-1902 PART 1： Schematic Diagram ◆ Printed Circuit ◆ Exploded View PART 2: Key Ics And Assemblies PART 3： Detailed Circuit PART 4: Main Board ◆ DVD Board ◆ HI-voltage Board ◆...

  • Page 2: Schematic Diagram

    Part 1 Brief Introduction Of TheLVD-1902 Schematic Diagram PANEL POWER DIANYUAN RGB/CVBS SCART SUPPLY:16V、5V、3.3V、1.8V LVDS 3.3V 1.8V R G B PC IN 16V 5V AT49F040A HSI VSI FLI8125 74LVC125 FLASH CVBS AV IN DECODER SCALER SVHS MX29LV160 INVERTER YPBPR FLASH RGB/YUV CVBS YPBPR...

  • Page 3: Printed Circuit

    Printed Circuit 1. Main board A: TOP LAYER...
  • Page 4 B: BOTTOM LAYER...

  • Page 5: Dvd Board

    2. DVD board A: TOP LAYER B: BOTTOM LAYER...

  • Page 6: Power Board

    3. Power board A: TOP LAYER B: BOTTOM LAYER...

  • Page 7: Inverter Board

    4. Inverter board A: TOP LAYER B: BOTTOM LAYER...
  • Page 8 5. Remote Control Board A: TOP LAYER B: BOTTOM LAYER 6. Key board A: TOP LAYER B: BOTTOM LAYER...

  • Page 9: Part 2 Exploded View

    Part 2 Exploded view Exploded view...

  • Page 11: Part 3 Key Ics And Assemblies

    Part 3 Key ICs And Assemblies On Main Board On DVD board Serial Serial Position Type Position Type 78L09 BA033 LM1117MPX-3.3V AZ1117H-1.8V 2U3 4U6 FDS9435 MT1389DE/E AIC1084(3.3V) BA5954FP TL494C BA6287 LM1117DTX-1.8V IS42S16400B-7T CD4052 MX29LV160BBTC-70 MSP3415G 24C16 AT24C32AN NJM4558 FSAV330 CS4344 AT49BV040B 78L05 FLI8125-LF...
  • Page 12 ICS ON MAIN BOARD 1. FSAV330 Low On Resistance Quad SPDT Wide Bandwidth Video Switch...
  • Page 13 2. 74LVX125 Low Voltage Quad Buffer with 3-STATE Outputs.
  • Page 14 3. AT49BVO40B...
  • Page 17 4. LM1117...
  • Page 18 5. FDS9435A Single P-Channel Enhancement Mode Field Effect Transistor SO-8 P-Channel enhancement mode power field effect transistors are produced using Fairchild's proprietary, high cell density, DMOS technology. This very high density process is especially tailored to minimize on-state resistance and provide superior switching performance.
  • Page 19 6．FLI8125 The FLI8125 is a cost-effective, highly-integrated, mixed signal solution for TV and Digital Video applications. It incorporates a multi-standard video decoder, high-speed triple 8-bit Analog-to-Digital Converter(ADC),and front end switching. An integrated VBI Slicer adds Closed Captioning(CC) and Teletext service support, and the built-in microprocessor enables full system control without external devices.
  • Page 20 ·PInput ·Pin List I/O Legend: A = Analog, I = Input, O = Output, P = Power, G= Ground Table 1: Analog Input Port Pin Name Description VDD18_A Analog Power (1.8V) for A & B Channels. Must be bypassed with 0.1uF capacitor to the analog system ground plane.
  • Page 21 Positive analog input ‘A’ for channel 1. The input has to be AC coupled using a series 20 Ohm resistor and 0.1uF Capacitor network. GNDS Analog Ground. Must be directly connected to the analog system ground plane on board. Positive analog input ‘B’ for channel 1. The input has to be AC coupled using a series 20 Ohm resistor and 0.1uF Capacitor network.
  • Page 22 Negative analog sync input for channels 1 through 4. This acts as the return Path for the Sources connected to SV Channel Inputs. This has to be AC coupled using a series 20 Ohm resistor and 0.1uF Capacitor network to Analog Ground Plane on board. VO_GND Analog Ground.
  • Page 23 VID_DATA_IN_8 Input Pr / Pb Data in case of 16 Bit Video Input (CCIR601) of Video Input – 1 VID_DATA_IN_9 OR Input Green Data in case of 24 Bit Video Input VID_DATA_IN_10 VID_DATA_IN_11 VID_DATA_IN_12 VID_DATA_IN_13 VID_DATA_IN_14 VID_DATA_IN_15 VID_DATA_IN_16 Input Blue Data in case of 24 Bit Video Input VID_DATA_IN_17 OR Video Input –...
  • Page 24 GPIO14/PWM3/ This Pin can be programmed to give out Pulse Width Modulated Output Pulses for external use. SCART16 Or it can be programmed to sense the Fast Blank Input signal from a SCART I/P source. When not used, this pin is available as General Purpose Input/output Port. This Pin provides the Output Data in case of Boundary Scan Mode.
  • Page 25 Table 7: TTL Display Interface Pin Name Description For 8-bit panels For 6-bit panels PBIAS Panel Bias Control (backlight enable) [Tri-state output, 5V- tolerant] PPWR Panel Power Control [Tri-state output, 5V- tolerant] Digital Power for TTL Block. Connect to digital 3.3V supply. AVDD_LV_33 VCO_LV Reserved.
  • Page 26 PD46 Blue channel bit 6 (Odd) Blue channel bit 4 (Odd) PD47 Blue channel bit 7 (Odd) Blue channel bit 5 (Odd) Note: In case of 24 Bit TTL Panels the RGB Odd Channel Outputs will not be used. In that case they can be made available for other purposes as Address &...
  • Page 27 7. CD4052B The CD4052B is a differential 4-Channel multiplexer having two binary control inputs, A and B, and an inhibit input. The two binary signals select 1 of 4 pairs of channels to be turned on and connect the analog inputs to the outputs. ·PInputs...
  • Page 28 8. AT24C32AN 2-Wire Serial EEPROM 32K (4096 x 8)
  • Page 30 9. TPA3008D2 10-W STEREO CLASS-D AUDIO POWER AMPLIFIER.
  • Page 31 ·Pin Description...
  • Page 32 10. TL494 PULSE-WIDTH-MODULATION CONTROL CIRCUITS...
  • Page 33 ICS ON DVD BOARD 1. BA5954...
  • Page 35 2. MT1389HD Abbr. : SR : Slew Rate PU : Pull Up PD : Pull Down SMT : Schmitt Trigger 2MA~16MA : Output buffer driving strength. Main Alt. Type Description RF Interface ( 26 ) RFGND18 Ground Analog ground RFVDD18 Power Analog power 1.8V Analog output...
  • Page 36 ADC Power ( 2 ) ADCVDD3 Power Analog 3.3V Power for ADC ADCVSS Ground Analog ground for ADC VPLL (3) VPLLVSS Ground Analog ground for VPLL CAPPAD Analog Input VPLL External Capacitance connection VPLLVDD3 Power Analog 3.3V Power for VPLL Reference Voltage ( 3 ) V2REFO Analog output...
  • Page 37 RF Data PLL Interface ( 9 ) Main Alt. Type Description JITFO Analog output The output terminal of RF jitter meter. JITFN Analog Input The input terminal of RF jitter meter. PLLVSS Ground Ground pin for data PLL and related analog circuitry. IDACEXLP Analog output Data PLL DAC Low-pass filter...
  • Page 38 Input HIGHA0 2~16MA, SR Microcontroller address 8 Input HIGHA1 2~16MA, SR Microcontroller address 9 Input HIGHA2 2~16MA, SR Microcontroller address 10 Input HIGHA3 2~16MA, SR Microcontroller address 11 Input HIGHA4 2~16MA, SR Microcontroller address 12 Input HIGHA5 2~16MA, SR Microcontroller address 13 Input HIGHA6 2~16MA, SR...
  • Page 39 Main Alt. Type Description Input IOA1 2~16MA, SR Microcontroller address 1 / IO Input IOA2 2~16MA, SR Microcontroller address 2 / IO Input IOA3 2~16MA, SR Microcontroller address 3 / IO Input IOA4 2~16MA, SR Microcontroller address 4 / IO Input IOA5 2~16MA, SR...
  • Page 40 Input 2~16MA, SR Microcontroller address latch enable PU, SMT Main Alt. Type Description IOOE# Input 2~16MA, SR Flash output enable, active low / IO IOWR# Input 2~16MA, SR Flash write enable, active low / IO IOCS# Input 2~16MA, SR Flash chip select, active low / IO PU, SMT UWR# Input...
  • Page 41 1) Microcontroller port 3-4 Input 2) Hardwired RD232 RXD UP3_4 RXD SCL 4MA, SR 3) I C clock pin PU, SMT 1) Microcontroller port 3-5 Input 2) Hardwired RD232 TXD UP3_5 TXD SDA 4MA, SR PU, SMT C data pin Input IR control signal input Input...
  • Page 42 Non-pull Audio serial data 0 (Front-Left/Front-Right) DSD data left channel Trap value in power-on reset : Input I) 1 : manufactory test mode ASDATA0 II) 0 : normal operation PD SMT While using external channels: I) GPO_2 Audio serial data 1 (Left-Surround/Right-Surround) DSD data right channel Trap value in power-on reset : I) 1 : manufactory test mode...
  • Page 43 APLLVSS Ground Ground pin for audio clock circuitry ADACVSS2 Ground Ground pin for AUDIO DAC circuitry ADACVSS1 Ground Ground pin for AUDIO DAC circuitry AUDIO DAC Sub-woofer channel output While internal GPIO Output AUDIO DAC not used: GPIO AUDIO DAC Right Surround channel output While internal AUDIO DAC not used: GPIO Output...
  • Page 44 Output Video data output bit 6 YUV6 R/Cr/Pr 4MA, SR Red or CR Vertical sync input/output While no External TV-encoder: Input I) Vertical sync for video-input 4MA, SR VSYN V_ADIN1 II) Version AD input port 1 III) GPIO Non-pull Video data output bit 7 While no External TV-encoder: Input I) Microcontroller external interrupt 3...
  • Page 45 IO_5 Input Digital Video output C bit 5 (RD21) Non-pull GPIO IO_6 Input Digital Video output C bit 6 (RD22) Non-pull GPIO IO_7 Input Digital Video output C bit 7 (RD23) Non-pull GPIO Input IO_17 (DQM2) GPIO Non-pull IO_8 Input Digital Video output Clock YUVCLK (DQM3)
  • Page 46 CAS# output DRAM column address strobe, active low RWE# output DRAM Write enable, active low Input DQM1 Data mask 1 Input Non-pull IO_18 (DQS1) GPIO Input DRAM data 8 Input DRAM data 9 Input RD10 DRAM data 10 Input RD11 DRAM data 11 Input RD12...
  • Page 47 3.24C16 2-Wire Serial CMOS E PROM 16k ( 2048 x 8 ) The AT24C16 provides 16384 bits of serial electrically erasable and programmable read only memory (EEPROM) organized as 2048 words of 8 bits each. The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential.
  • Page 50 4. NJM4558 DUAL OPERATIONAL AMPLIFIER...
  • Page 51 5. BA033 Low saturation voltage type 3-pin regulator...
  • Page 52 ICS ON HI-VOLTAGE BOARD 1. BIT3193 High Performance PWM Controller BIT3193 integrated circuit provides the essential features for general purpose PWM controller in a small low cost 16-pin package. BIT3193 has built-in a low frequency PWM generator for any specified application. BIT3193 includes latched off protection feature may make the system more reliable while compare to other similar products.
  • Page 53 ·Pin Description Symbol Descriptions The inverting input of the error amplifier. Output of the error amplifier. LOAD A switch that connected to the high frequency triangle wave generator. This switch is open while ISEN pin <1.3V. An external resistor connected here may change the operation frequency of CTOSC in open load situation.

  • Page 54: Part 4 Detailed Circuit

    Part 4 Detailed Circuit MAIN BOARD 1. Analog front end 1CN1 Y PBPR-R-IN RCA JACK 2CON8 Y PBPR-L-IN VCC9V SHIELD AUX1-CVBS SCART-CVBS1 V/Y IN 0.1uF CVBS_OUT 20R/1% VOUT BLKGND AV-S/VIDEO-L-IN 75R/1% PESD5V0L5 1R84 1R86 VGND SCART-FB SCART-R SCART-A-OUTR AV-S/VIDEO-R-IN DGND SCART-A-R-IN 3C87 3EC52...
  • Page 55 2. Hudson ADC-R V3.3V CON-1.25 2R23 2R24 2R25 2CON3 2L21 PB0603 KEY_ADC_IN3 2L23 PB0603 KEY_ADC_IN2 2L24 PB0603 KEY_ADC_IN1 2L25 PB0603 2L26 PB0603 2C67 EJECT 2L27 PB0603 0.1uF 2C68 2C69 K6X4008T1F-YB70/NC 2L28 PB0603 STOP 2L29 PB0603 PLAY 0.1uF 0.1uF VCC5V I/O0 1C67 1C71 1C72...
  • Page 56 3. Audio RCA JACK YPBPR-L-IN YPBPR-R-IN SCART-A-L 2CON4 VCC55V 3R21 YPBPR-R-IN YPBPR-R-IN 3 [1] YPBPR-L-IN YPBPR-L-IN 3 [1] PESD5V0L5 SCART-A-R 3R20 VCC5V SDA 2 [1,2] 4FB5 VCC5V 4052-L 3EC41 10uF SCL 2 [1,2] 3EC15 3C34 FB0410 100nF VCC5V MONO-1 MONO 3 4052-R 3C36 100uF/16V...
  • Page 57 4. Power DC16V JACK VCC16V DC+16VCC VCC16V 4CON2 CON06-2.54 4EC1 DC+16VCC 100nF 470uF/25V DC+16VCC 100nF DC+16VCC TRANSFORMER DC-GND DC-GND DC-GND DC-GND NOTE: PAD of heat sink at the PCB double side should be recommended VCC5V AIC1084 3.3V +3.3VCC TO-252-3/LT1084 +3.3VCC NOTE: VCC16V PAD of h eat sink sh o u ld b e...
  • Page 58 DVD BOARD 1. Index...
  • Page 59 2. MT1389 JITFO 390pF JITFN RFV33 RFVDD3 DV33 RFV33 750k RXD/ R117 2200pF DACVDD3 EJECT/ R118 EJECT EJECT EJECT [4] 0.1uF/NC 10uF/25v TXD/ R119 680k ADIN 0.1uF 0.01uF 2200pF CB38 CE13 0.1uF 47uF/10v DV33 CB12 DV33 22uH 10uF/25v 10uF/25v 1500pF 0.1uF APLLVDD3 1206-A...
  • Page 60 3. Video out and AV connector AVCC +5VV L20 FB +12V 47uF/10V 0.1uF ACLK ACLK ABCK ABCK ALRCK CB48 CB49 CB50 ALRCK ABCK SBCLK ASDAT0 0.1uF 0.1uF 0.1uF ASDAT0 ALRCK SLRCK ACLK SACLK EJECT EJECT ASDAT0 R112 SASDAT0 DVD-L DVD-L AVCC AVCC CON2...
  • Page 61 4. SDRAM and FLASH [1,2,5] DV33 DV33 [1,2,4,5] DV33 SD33 MA[0..11] MA[0..11] SD33 BA[0..1] BA[0..1] DQM[0..1] DQM[0..1] DCLK DCLK CB43 CB44 CB39 CB40 CB41 DCKE DCKE CE28 CB42 CB76 CB57 0.1uF 0.1uF 0.1uF CAS# CAS# 100uF/10v 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF RAS# RAS#...
  • Page 62 HI-VOLTAGE BOAD...
  • Page 63 Part 5 Part list of LVD-1902 Bom No Part No Part Name 02.03.116.2541 Remote control LTD-51702-2541C board Part No Name Specification LOCA NO 0805-105 01.54.CS.3.E105Y SMD capacitor 1 C2 Y5V-20+80%/16V 01.57.R.3.E101J SMD resistor 0805-100Ω±5% 1 R1 φ3 01.41.D.FD.E3RB Radiation diode...
  • Page 64 Part No Name Specification LOCA NO R2 R6 R10 R12 R14 R21 R22 R28 R29 R30 01.57.R.2.E000J SMD resistor 0603-0Ω ±5% R39 R50 R69 R74 R78 R81 R84 R117 R118 R119 01.57.R.3.E1R0J SMD resistor 0805-1Ω±5% 5 R23 R42 R43 R44 R45 01.57.R.2.E4R7J SMD resistor 0603-4.7Ω±5%...
  • Page 65 0603-22P 01.54.CS.2.E220N SMD capacitor 2 C63 C55 NPO±5%/50V 0603-33P 01.54.CS.2.E330N SMD capacitor 2 (C18) (C19) NPO±5%/50V 0603-100P C1 C45 C46 C47 C51 01.54.CS.2.E101N SMD capacitor NPO±5%/50V C52 C53 0603-150P 01.54.CS.2.E151N SMD capacitor 2 C43 C44 NPO±5%/50V 0603-220P 01.54.CS.2.E221N SMD capacitor 2 C64 C61 NPO±5%/50V 0603-330P...
  • Page 66 CB5 CB7 C58 CB57 0603-105 01.54.CS.2.E105Y16V SMD capacitor 5 C29 C30 C31 C32 C33 Y5V-20+80%/16V Electrolyse CD11X-3.3UF/50V 01.34.CL.D.E3U350VB 1 C60 capacitor C11 C12 C14 CE30 Electrolyse CD11X-10UF/25V 01.34.CL.D.E10U25VB CE31 CE33 CE34 C56 capacitor C59 2CE12 CE3 CE6 CE8 CE10 Electrolyse CD11X-47UF/10V CE11 CE13 CE16 01.34.CL.D.E47U10V2B...
  • Page 67 01.46.IC.E24C16 24C16 SMD 1 U7 01.46.IC.HY57V641620 HY57V641620ETP- 1 U8 ETP7 7 SMD 01.44.IC.S.E29LV160C KH29LV160CBTC-7 1 U9 0G SMD 01.44.IC.D.E78L05 78L05 DIP 1 U1 01.44.IC.S.E4558 NJM4558 SMD 1 U11 01.44.IC.S.E4344 CS4344 SMD 1 U10 01.40.CON.DPH.E047 Jack PH-13A 1 J8 01.40.CON.DPH.E002 Jack PH-10A 1 CON2 01.40.CON.S05.E007...
  • Page 68 1R70 1R69 1R68 2R39 01.57.R.2.E221J SMD resistor 0603-220Ω±5% 1 2R36 3R18 3R19 2R26 01.57.R.2.E301J SMD resistor 0603-300Ω±5% 3R116 3R117 3R100 3R112 01.57.R.2.E471J SMD resistor 0603-470Ω±5% 3 2R35 2R17 3R98 01.57.R.2.E122J SMD resistor 0603-1.2KΩ±5% 1 2R11 1R59 2R30 3R50 3R52 3R55 3R60 4R26 2R32 01.57.R.2.E102J SMD resistor 0603-1KΩ±5%...
  • Page 69 Press agile 1C67 1C71 1C73 1C74 01.57.R.Y.E330 AVL14K03300 resistor 1C75 1C72 SMD row 01.57.R.8.EP1034 10KΩ*4 ±5% 2 2RP3 2RP5 resistor 0603-5P 01.54.CS.2.E5P0N SMD capacitor 2 1C56 1C57 NPO±0.25PF/50V 0603-10P 01.54.CS.2.E100N SMD capacitor 2 (3C14) (3C13) NPO±5%/50V 0603-6P 01.54.CS.2.E6P0N SMD capacitor 2 (3C27) (3C26) NPO±0.25%/50V 1C45 1C53 1C34 1C49...
  • Page 70 0603-473 1C20 1C25 1C31 01.54.CS.2.E473Y SMD capacitor Y5V-20+80%/50V 1C63 1C62 1C61 0603-102 01.54.CS.2.E102X SMD capacitor 3 4C6 3C70 4C10 X7R±10%/50V 0603-152 01.54.CS.2.E152X SMD capacitor 3 3C15 3C18 3C22 X7R±10%/50V 0603-103 01.54.CS.2.E103Y SMD capacitor 3 3C45 3C69 (1C42) Y5V-20+80%/50V 0603-823 01.54.CS.2.E823X SMD capacitor 2 3C28 3C29 X7R±10%/50V...
  • Page 71 1EC2 1EC3 2EC3 Electrolyse CD110-220UF/16V 01.34.CL.D.E220U16VD 2EC4 4EC12 4EC7 capacitor 6.3*12 4EC13 3EC9 Electrolyse CD110-220UF/25V 01.34.CL.D.E220U25VD 2 4EC10 4EC11 capacitor 8*12 Electrolyse CD110-470UF/10V 01.34.CL.D.E470U10VD 1 2EC21 capacitor 6.3*12 Electrolyse CD110-470UF/16V 01.34.CL.D.E470U16VD 2 4C13 4EC5 capacitor 8*12 01.34.CL.D.E288470U2 Electrolyse CD288H-470UF/25V 4EC1 4EC3 2EC5 capacitor 8*14 3EC39 4EC4 3EC11...
  • Page 72 19.6608MHZ-49S-2 01.00.JZ.E196608A DIP oscillator 1 2Y1 18.432MHZ-49S-12 01.00.JZ.E18432A DIP oscillator 1 3Y1 01.40.CON.DDZ.ES-081 S end seed S-081-9 1 1CN2 01.40.CON.DCZ.E089 Same core jack AV3-8.4-14G 1 1CN3 01.40.CON.DCZ.E164 Same core jack AV3-8.4-14G 1 1CN1 01.40.CON.DCZ.E450 Same core jack AV2-8.4-14/PB 1 2CON4 EV-015FC/15 pin 01.40.CON.DCZ.E007 VGA jack...
  • Page 73 01.44.IC.S.E9034 Transistor SFR9034 SMD 1 4Q1 01.44.IC.S.E4052 CD4052 SMD 1 3U4 01.44.IC.S.E3415 MSP3415G SMD 1 3U1 01.44.IC.S.E24C32 AT24C32AN SMD 1 1U4 01.44.IC.S.EV330 FSAV330 SMD 1 1U1 01.46.IC.EAT49BV AT49BV040B SMD 1 2U1 01.44.IC.S.E8125 FLI8125-LF 1 2U5 TPA3008D2PHP 01.44.IC.S.E3008D 1 3U6 01.46.IC.E24C02 24C02 SMD 1 1U3 01.44.IC.S.E3547...
  • Page 74 Carbon film 01.57.R.C.EG563 RT2W-56KΩ 1 R5 resistor 01.57.R.R.E5D11 Hot agile resistor NTC-5D-11 1 TH1 Press agile 01.57.R.Y.E10K 10K.471 1 VR1 resistor 0805-104 01.54.CS.3.E104X SMD capacitor 2 C13 C10 X7R±10%/50V 0805-473 01.54.CS.3.E473X SMD capacitor 1 C5 X7R±10%/50V 1206-102 01.54.CS.4.E102X200V SMD capacitor 1 C6 X7R±10%/200V 150uF/400V 18*36...
  • Page 75 01.41.D.PD.ESF20NC15 Diode SF20NC15M 2 D3 D4 MBRF20150CT 01.41.D.PD.E2015CT Diode 2 D3 D4 01.41.D.WD.E10V DIP zener diode 1 ZD1 01.41.D.WD.E20V DIP zener diode 1 ZD2 FSCM0765RGWDT 01.44.IC.D.EM0765 1 U5 01.44.IC.D.EPC817 PC817 DIP 1 U2 01.44.IC.D.EKA431A KA431AZ DIP 1 U3 01.41.D.PD.EUS4K80 Diode US4K 80R DIP 1 BD1 01.41.D.PD.EGBU406...
  • Page 76 01.57.R.2.E681J SMD resistor 0603-680Ω±5% 4 R27 R30 R33 R36 01.57.R.2.E681F SMD resistor 0603-680Ω 1% 4 R28 R31 R34 R37 01.57.R.2.E202J SMD resistor 0603-2KΩ±5% 1 R9 01.57.R.2.E103J SMD resistor 0603-10KΩ±5% 3 R41 R17 R40 01.57.R.2.E153J SMD resistor 0603-15KΩ±5% 4 R23 R24 R25 R26 01.57.R.2.E203J SMD resistor 0603-20KΩ±5%...
  • Page 77 01.41.D.PS.EBAW56 Diode BAW56 SMD 2 D1 D2 D3 D04 D05 D06 D07 01.41.D.PS.EBAV99 Diode BAV99LT1 SMD D08 D09 D10 01.41.D.PS.E1SS355 Diode 1SS355 SMD 1 D11 01.41.D.WS.EUDZ7V5B Diode UDZ7V5B(7.5V) 1 ZD1 01.42.Q.S.E2N3904 Audion 2N3904 SMD 2 Q1 Q4 01.42.Q.S.E2N3906 Audion 2N3906 SMD 1 Q5 01.42.Q.S.E2N7002 Transistor...
  • Page 78 Part6 Debugging Procedures 1. Signal process diagram...
  • Page 79 2. Debugging Strategy...
  • Page 80 In DVD mode Check the Pin STB (147)of FL18125 is low Is tray works OK? Check Is signal of Can sled return to Motor SL+ SL- Position automatically? Driver BA6287 Check the circuit connected With the loader Focus operation Drive signal of F+/F- OK? Check periphery circuit of BA5954 Check circuit between laster head and BA5954...
  • Page 81 3. Tips Of Some Typical Troubleshooting White screen First check voltage in HI-voltage Board; otherwise check the voltage of MAIN board , if abnormal , the problem occurs in 4U1. If the voltage is OK, check the LVDS. At last the connection between the main board and drive board may be the target for troubleshooting.