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LG StudioWorks 570LE, Service Manual

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LG StudioWorks 570LE Service Manual Download Page 17

TROUBLESHOOTING GUIDE

- 16 -

1. NO POWER

CHECK U22, U11.

CHECK 

U22 PIN5 VOLTAGE

(5V) ?

NO

NO POWER

(POWER INDICATOR OFF)

CHECK ADAPTER,

AND FIND OUT 

A SHORT POINT 

AS OPENING 

EACH POWER LINE

CHECK J1’S

VOLTAGE

(24V) ?

NO

CHECK T1’S PRIMARY

COIL (OPEN CHECK)

CHECK 

U17 Voltage

(5V) ?

NO

U13’S PIN11

0V ?

CHECK U13, AND

CHECK 5VA LINE

CHECK IIC LINE

CONNECTION

(U3, U1)

CHECK U4’S VCC,

XTAL, RESET

IS U5 PIN12 

VOLTAGE REPEATED 

AS PULSE SHAPE ?

NO

YES

YES

YES

NO

YES

NO PROBLEM

NO

CHECK KEY CONTROL

CONNECTOR ROUTINE

Summary of Contents for StudioWorks 570LE

Page 1: ... mail http www LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO CL 06 MODEL StudioWorks 570LE 570LS LB570BZ ID LABEL LB570D EA LB570E EA LB570D EN Same looking with New Chassis Issue Date JULY 2000 ...

Page 2: ... 570LE Model No LB570BE Manufactured Before JULY 2000 Model No LB570D EA Manufactured After JULY 2000 Chassis No CL 06 Factory ID GG MODEL NO LB570CE POWER DC 24V 1 2A SERIAL NO 007KG00001 MANUFACTURED JULY 2000 FCC ID BEJLB570C 3850TIZ254A This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 ...

Page 3: ... p b Color 7 0 0 467 Vp p c Color 15 0 0 714 Vp p 3 Input Impedance 75 Ω 3 3 Operating Frequency Horizontal 31 69kHz Vertical 56 85Hz 4 POWER SUPPLY 4 1 Power Adaptor Input AC 100 240V 50 60Hz 1 2A Output DC 24V 1 5A 4 2 Power Consumption 5 ENVIRONMENT 5 1 Operating Temperature 10 C 35 C 50 F 95 F Ambient 5 2 Relative Humidity 10 80 Non condensing 5 3 Altitude 0 10 000ft 3 030m 6 DIMENSIONS with T...

Page 4: ...body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty please wipe it off with a softmaterial Cleaning with a dirty or rough cloth may damage the panel WARNING BE CAREFUL EL...

Page 5: ... 350 720 x 400 TEXT 640 x 480 640 x 480 640 x 480 640 x 480 800 x 600 800 x 600 800 x 600 800 x 600 800 x 600 832 x 624 MAC 1024 x 768 1024 x 768 1024 x 768 1024 x 768 Total Period E 800 449 900 449 800 525 864 525 840 500 832 509 1024 625 1056 628 1040 666 1056 625 1048 631 1152 667 1344 806 1328 806 1312 800 1376 808 Video Active Time A 640 350 720 400 640 480 940 480 640 480 640 480 800 600 800...

Page 6: ...nd exit from the On Screen Display OSD 4 OSD Selection Buttons Use these buttons to select highlighting an OSD icon 5 OSD Adjustment Buttons Use these buttons for adjusting the level of the selected item 6 Brightness Control Buttons Use these buttons for adjusting the brightness of screen 7 Auto Button This button is for the automatic adjustment of the screen position clock and clock phase Power O...

Page 7: ... M i n A D J S E L O S D T I M E 5 0 S e c o n d s To adjust the screen contrast level To move the image left or right To move the image up or down To adjust the horizontal size of the image To adjust the focus of the display A D J S E L M A I N S E L 9 3 0 0 K 6 5 0 0 K U s e r 9 3 0 0 K 6 5 0 0 K U s e r R G B R e c a l l A D J S E L O S D P o s i t i o n H P o s i t i o n V P o s i t i o n M A ...

Page 8: ...CONTROL PCB 1 2 3 4 5 6 7 8 9 NO 1 2 3 4 5 6 7 8 9 Ref No S9 S1 S2 S3 S4 S5 S6 S7 S8 Control Function POWER SWITCH AUTO BUTTON BRIGHTNESS BRIGHTNESS OSD OSD OSD RIGHT OSD LEFT OSD ON OFF WIRING DIAGRAM CN1 CN2 P1 P2 J7 CN3 J8 J2 P3 ...

Page 9: ...wivel 2 BACK COVER REMOVAL 1 Remove four screws a from the Back Cover 2 Remove the Back Cover 3 TOP SHIELD INVERTER SHIELD REMOVAL 1 Remove six screws a 2 Remove the Top Shield 3 Remove two screws b 4 Release two latchs c 5 Remove the Inverter Shield b b a a a a a c a a a Back Cover ...

Page 10: ...Backlight Ass y LCD Module a a a a a a a a CN2 J5 CN3 J2 J3 a d d d d b b a c c Front Cabinet 4 INVERTER POWER CONTROL AND MAIN PCB ASSEMBLY REMOVAL 1 Disconnect J8 J2 and J7 2 Remove four screws a 3 Remove the Main PCB Ass y 4 Disconnect CN2 and CN3 5 Remove two screws b 6 Remove the Inverter PCB Ass y 7 Remove two screws c 8 Remove the Control and Power PCB Ass y 9 Remove four screws b 10 Remove...

Page 11: ...BLOCK DIAGRAM 10 POWER CORD 15 pin D SUB SIGNAL CABLE POWER SUPPLY CONTROL PCB INVERTER PCB MAIN LOGIC PCB LCD MODULE System Block Diagram ...

Page 12: ...EG REG An alog Switc h 5V 5V Module I2C Control EEPROM 24LC08B Li nk Conn ector Panel Li nk Transmit ter Sil 100 Contr ol Sign a l TM DS SDA SCL 15PIN 3 ROW D SUB PRE AMP ADC PLL TDA8752B 8 BIT 8 BIT 8 BIT H sy nc Clamp Buf fer 24V GND 5VST 5VPLL 3 3VD2 3 3VD 5V 5V 5VPLL 5VANA 5VST 3 3VD 3 3VD V sync AD DR DA TA 10 16 RD WR MEMORY 2M Byt e 2 I2C 3 3VD2 H sy nc V sync Contro l Communi cation 8bit ...

Page 13: ...anel link transmitter U16 delivers digital signal to the receiver inside LCD module by method of abstraction The abstracted signals are pairs of TX0 TX1 TX2 TXC of which voltage swing is 0 5V each Its swing is similar to LVDS Low Voltage Differential Signal Transmitter U16 gets signals of HSYNC OUT VSYNC OUT DEN CLKA ODD from U5 and outputs TMDS Transition Minimized Differential Signal through TX ...

Page 14: ... 13 BLOCK DIAGRAM FOR LB570E 570LS ...

Page 15: ... 8 bit R G B to LCD module 3 Memory Circuit 2M byte SDRAM U6 7 is used as a frame converter for supporting up to 85 Hz frame rate and controlled by MX88L284 U5 The control signals are CKA CLK UDOM LDOM WE CAS RAS CS BA 4 System Controller Microprocessor Circuit 1 Microprocessor U4 distinguishes polarity and frequency by calculating horizontal and vertical sync input from signal source 2 Microproce...

Page 16: ... Adjustment for Factory Preset Mode 1 Run alignment program for 570LE New or 570LS New on the IBM compatible PC 2 Select EEPROM all clear command and Enter 3 Display cross hatch pattern at Mode 1 4 Select COMMAND PRESET START command 5 Select FOS DEFAULT command and Enter 6 Press Y key it will automatically save all FOS data to EEPROM 2 Adjustment for White Balance 1 Display color 0 0 pattern at M...

Page 17: ...HORT POINT AS OPENING EACH POWER LINE CHECK J1 S VOLTAGE 24V NO CHECK T1 S PRIMARY COIL OPEN CHECK CHECK U17 Voltage 5V NO U13 S PIN11 0V CHECK U13 AND CHECK 5VA LINE CHECK IIC LINE CONNECTION U3 U1 CHECK U4 S VCC XTAL RESET IS U5 PIN12 VOLTAGE REPEATED AS PULSE SHAPE NO YES YES YES NO YES NO PROBLEM NO CHECK KEY CONTROL CONNECTOR ROUTINE ...

Page 18: ...SPLAYED CHECK ADAPTER J4 PIN10 24V NO 1 CONFIRM BRIGHTNESS OSD CONTRL STATE 2 CHECK MICOM DIM ADJ PORT J4 PIN1 5V NO REPLACE INVERTER ASS Y CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL CONTACT PROBE TO CAUTION LABEL CAN YOU SEE PULSE AT YOUR SCOPE NO REPLACE CCFL LAMP IN THE LCD MODULE YES YES YES YES ...

Page 19: ... TROUBLE IN CABLE OR LCD MODULE TROUBLE IN CABLE OR LCD MODULE CHECK U12 U10 CHECK SOLDERING STATE OF U16 J5 PIN40 3 3V IS APPEAR LOW VOLTAGE SIGNAL AT J4 YES YES NO NO CHECK U12 J4 PIN4 5V NO YES YES YES 570LS 570LE YES 3 NO RASTER OSD IS NOT DISPLAYED MX88L284 NO RASTER OSD IS NOT DISPLAYED J5 PIN2 IS 65MHz CLOCK PIN4 IS 48KHz H SYNC PIN5 IS 60Hz V SYNC PIN37 IS 48KHz H SYNC IS PULSE APPEARED AT...

Page 20: ...R LINE CHECK R G B INPUT U1 PIN 12 20 28 NO CHECK IIC LINE CHECK IIC PULSE U1 PIN32 33 NO CHECK H SYNC LINE D SUB U8 MICOM U1 PIN95 CHECK CKREF H SYNC INPUT U1 PIN94 NO CHECK CKREF INPUT CHECK H SYNC INPUT U1 PIN90 NO YES YES YES YES YES YES YES NO RASTER OSD IS DISPLAYED 4 NO RASTER OSD IS DISPLAYED TDA8752BH ...

Page 21: ...11 TO U1 PIN89 CHECK CLAMP INPUT H SYNC U1 PIN89 NO CHECK SIGNAL LINE FROM U1 PIN84 TO U4 PIN254 1024x768 85Hz 95MHz CHECK CLOCK INPUT 25MHz 95MHz SINEWAVE U5 PIN207 NO CHECK SIGNAL LINE FROM U2 PIN80 TO U5 PIN203 CHECK H SYNC INPUT U5 PIN203 NO YES YES YES 4 NO RASTER OSD IS DISPLAYED TDA8752BH MX88L284 ...

Page 22: ...BA2 BA7 120 40 30 RA2 70 60 CA11 CA10 20 D3 D4 R62 U15 50 26 BA10 BA15 BA9 140 130 20 RA8 RA1 80 CA9 10 D7 R63 D1 R85 C88 C3 U7 1 R89 BA17 BA16 150 10 5 1 RA7 CA8 CA7 R51 R77 90 U1 100 C51 J3 D5 C137 25 RA5 BA1 BA11 170 160 BA38 180 BA39 RA6 200 190 U5 205 C265 C174 C136 RA4 L8 R72 C49 C170 R80 C5 C168 R2 R42 C52 C4 R49 C12 J7 U12 C129 R81 50 26 BA13 BA14 BA12 BA37 L9 L7 C42 U14 R132 Q2 Q1 R133 R7...

Page 23: ...124 C123 R19 R23 C97 C243 C92 C253 C133 C192 C190 C184 C191 C189 C183 C173 C171 C53 C167 C61 C163 C20 C148 L1 Q6 Q5 R91 C233 C134 C104 C122 C100 C180 C98 C256 C241 C91 C211 R24 R71 R70 R69 C89 C182 C178 C177 R73 C179 C127 C65 C67 R78 C66 C50 C68 C9 R18 C85 R92 C55 C117 C120 C121 C107 C106 C105 C181 C101 C242 C90 C245 R39 R58 R53 R67 C176 C175 C1 C131 L15 L13 C116 C115 C224 L16 L17 C83 C229 C56 C86...

Page 24: ... 23 3 CONTROL BOARD Component Side 4 CONTROL BOARD Solder Side ...

Page 25: ... 24 EXPLODED VIEW 1 2 4 3 8 9 10 11 12 13 14 5 A 6 7 ...

Page 26: ...r StudioWorks 570LS CABINET ASS Y FOR LB570BZ No Brand LCD MODULE TFT LCD LM151X1 15 1 For StudioWorks 570LE LCD MODULE TFT LCD LM151X2 15 1 For StudioWorks 570LS MAIN FRAME INVERTER ASS Y MAIN PCB ASS Y For StudioWorks 570LE MAIN PCB ASS Y For StudioWorks 570LS MAIN SHIELD INVERTER SHIELD BACK COVER ASS Y CONTROL PCB ASS Y SCREW PZP 3x12 TILT SWIVEL ASS Y SCREW PVS 4x10 SIGNAL CABLE ADAPTER AC DC...

Page 27: ...OR CHIP CERAMIC LD LESS TC 1000PF 50V J SL 2012 R TP C35 0CH8107D611 CAPACITOR CHIP AL ELECTROLYTIC 100UF 10V M 85STD CYL R TP C36 0CH3104K566 CAPACITOR CHIP CERAMIC LD LESS HD 0 1UF 50V K X 2012 R TP C37 0CH3103K516 CAPACITOR CHIP CERAMIC LD LESS HD 10000PF 50V K B 2012 R TP C38 0CH3103K516 CAPACITOR CHIP CERAMIC LD LESS HD 10000PF 50V K B 2012 R TP C40 0CH3103K516 CAPACITOR CHIP CERAMIC LD LESS ...

Page 28: ... CAPACITOR CHIP CERAMIC LD LESS TC 10PF 50V D NP0 2012 R TP C107 0CH6100K116 CAPACITOR CHIP CERAMIC LD LESS TC 10PF 50V D NP0 2012 R TP C108 0CH3104K566 CAPACITOR CHIP CERAMIC LD LESS HD 0 1UF 50V K X 2012 R TP C109 0CH3104K566 CAPACITOR CHIP CERAMIC LD LESS HD 0 1UF 50V K X 2012 R TP C110 0CH3104K566 CAPACITOR CHIP CERAMIC LD LESS HD 0 1UF 50V K X 2012 R TP C111 0CH3104K566 CAPACITOR CHIP CERAMIC...

Page 29: ...V Z F 2012 R TP C173 0CH3154K946 CAPACITOR CHIP CERAMIC LD LESS HD 0 15UF 50V Z F 2012 R TP C174 0CH8107D611 CAPACITOR CHIP AL ELECTROLYTIC 100UF 10V M 85STD CYL R TP C180 0CH6100K116 CAPACITOR CHIP CERAMIC LD LESS TC 10PF 50V D NP0 2012 R TP C181 0CH6100K116 CAPACITOR CHIP CERAMIC LD LESS TC 10PF 50V D NP0 2012 R TP C185 0CH3104K566 CAPACITOR CHIP CERAMIC LD LESS HD 0 1UF 50V K X 2012 R TP C186 0...

Page 30: ...TP C262 0CH3105F946 CAPACITOR CHIP CERAMIC LD LESS HD 1UF 16V Z F 2012 R TP C263 0CH3104K566 CAPACITOR CHIP CERAMIC LD LESS HD 0 1UF 50V K X 2012 R TP C264 0CZZTAT002B CAPACITOR SVP SANYO 10V 47UF M REEL OS CON C265 0CH8107D611 CAPACITOR CHIP AL ELECTROLYTIC 100UF 10V M 85STD CYL R TP D1 0DS226009AA DIODE SWITCHING KDS226 TP KEC SOT 23 80V 300MA 2A 4NS 0 5UA D2 0DS226009AA DIODE SWITCHING KDS226 T...

Page 31: ...C1623 TP SAMSUNG SOT23 NPN EPI SILICON TR R1 0RH4701D622 RESISTOR CHIP 4 7K 1 10W 5 D R TP R2 0RH2201D622 RESISTOR CHIP 2 2K 1 10W P TYPE TAPPING R3 0RH3602D622 RESISTOR CHIP 36K 1 10W 5 D R TP R4 0RH4701D622 RESISTOR CHIP 4 7K 1 10W 5 D R TP R5 0RH4701D622 RESISTOR CHIP 4 7K 1 10W 5 D R TP R6 0RH4701D622 RESISTOR CHIP 4 7K 1 10W 5 D R TP R7 0RH1501D622 RESISTOR CHIP 1 5K 1 10W 5 D R TP R8 0RH1002...

Page 32: ...2D622 RESISTOR CHIP 22 1 10W 5 D R TP R68 0RH2702D622 RESISTOR CHIP 27K 1 10W 5 D R TP R69 0RH0000D622 RESISTOR CHIP 0 1 10W P TYPE TAPPING R70 0RH0000D622 RESISTOR CHIP 0 1 10W P TYPE TAPPING R71 0RH0000D622 RESISTOR CHIP 0 1 10W P TYPE TAPPING R73 0RH0222D622 RESISTOR CHIP 22 1 10W 5 D R TP R74 0RH0222D622 RESISTOR CHIP 22 1 10W 5 D R TP R75 0RH0332D622 RESISTOR CHIP 33 1 10W 5 D R TP R76 0RH120...

Page 33: ...XED CARBON FILM 680 OHM 1 4 W 3 4 2 TA52 R18 0RD8200Q509 RESISTOR FIXED CARBON FILM 820 OHM 1 4 W 3 4 2 TA52 R19 0RD1101Q509 RESISTOR FIXED CARBON FILM 1 1K OHM 1 4 W 3 4 2 TA52 R20 0RD1801Q509 RESISTOR FIXED CARBON FILM 1 8K OHM 1 4 W 3 4 2 TA52 S1 140 058E SWITCH TACT SKHV10910B LGEC NON 12V 20A HORIZENTAL 160G S2 140 058E SWITCH TACT SKHV10910B LGEC NON 12V 20A HORIZENTAL 160G S3 140 058E SWITC...

Page 34: ...1 MD5 172 MD4 173 MD3 174 MD2 175 MD1 176 MD0 177 AD0 178 AD1 179 AD2 180 AD3 181 AD4 182 AD5 183 AD6 184 AD7 185 GNDP 186 CPUA15 BCS 187 VDDP 188 ALE 189 WR 190 RD 191 TMCLK 192 RST 193 GPIOA0 194 GPIOA1 195 GPIOA2 196 GPIOA3 197 GPIOA4 198 GPIOA5 199 IRQ 200 SOGCS201 TDCLK CSYNC 202 HSYNC1 203 VSYNC1 204 GOUT3 205 GND 206 DCLKA 207 GNDP 208 156 DQM1 155 DQM0 154 VDDP 153 RAS 152 CAS 151 WE 150 C...

Page 35: ...f RDEC RIN RGAINC RAGC GDEC GIN GGAINC BDEC ADD1 SEN SCL SDA DIS BLUE CHANNEL GREEN CHANNEL TDA8752 RED CHANNEL ADC GOR ROR MUX CLAMP OUTPUTS 6 V CCAR 11 V CCAG 19 V CCAB 27 V DDD 40 AGNDG 21 V CCOG 69 V CCOB 59 V CCOR 79 V CCD 95 V CCA PLL 99 V CCO PLL 85 CLP 89 AGNDR 13 V SSD 41 AGNDB 29 OGNDG 60 OGNDR 70 AGNDPLL 96 OGNDB 48 DGND 86 OGNDPLL 82 12 10 3 22 24 28 26 20 18 14 16 33 34 38 TDO TCK 35 ...

Page 36: ...P BDEC VCCAB BIN AGNDB n c n c I2C 3W ADD1 ADD2 TCK PIN 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 scan test mode active HIGH DESCRIPTION SYMBOL PIN TDO scan test output DIS I2C and 3W disable control input SEN select enable for 3 wire serial bus input SDA I2C 3W serial data input VDDD logic I2C 3W digital power supply VSSD logic I2C 3W digital ...

Page 37: ... horizontal synchronization input pulse PLL clock output inverter command input invert when HIGH external clock input PLL coast command input PLL reference clock input digital power supply PLL analog ground PLL filter input PLL filter input PLL analog power supply not connected the outputs are in high impedance 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 ...

Page 38: ...0 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 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 SiI100 64 Pin TQFP Top View VCC Data Capture Logic D 7 0 D 15 8 D 23 16 DE0 DE1 DE2 HSYNC VSYNC CTL0 CTL1 CTL2 CTL3 D 23 0 DE HSYNC VSYNC CTL0 CTL1 CTL2 CTL3 DEDGE CEDGE Encoder 2 TXC TXC PLL IDCK TXC Swing Control EXT_SWING 24 SUPV SYN...

Page 39: ... 38 Pin Description Sil100 ...

Page 40: ... 39 Pin Description Sil100 ...

Page 41: ...19 10 20 BOOT INH D94IN163A SO20 VREF GOOD 5 1V COMP VFB SYNC BOOT DRIVER HICCUP CURRENT LIMITING INTERNAL REFERENCE SS INH ZERO CURRENT INHIBIT D94IN161B 3 3V V5 1 E A SOFT START 5 1V 3 3V THERMAL SHUTDOWN INTERNAL SUPPLY 5 1V PWM CURRENT LIMITING R S Q Q CBOOT CHARGE OSCILLATOR OUT OUT2 GND OSC VCC2 VCC 17 19 11 12 12 13 18 20 1 1 2 2 3 3 9 10 8 9 7 8 16 18 10 11 4 5 6 13 14 15 4 5 6 7 14 15 16 ...

Page 42: ...2 3 OUT Stepdown regulator output 12 13 VFB Stepdown feedback input Connecting directly this pin to the output 3 3V and 5 1V are obtained a voltage divider is requested for higher output voltages For voltage below 3 3V see note 16 18 V5 1 Reference voltage externally available 4 5 6 13 14 15 4 5 6 7 14 15 16 17 GND Signal ground 1 1 OSC An external resistor connected between the unregulated input ...

Page 43: ...ARTS TYPE PARTS TYPE MBRS130T3 MBRS190T3 BA033FP KA78M05R KA78M12R 1 INPUT 2 GND 3 OUTPUT 1 3 2 1 Vcc 2 GND 3 OUT 1 3 2 KSC1623 1 BASE 2 EMITTER 3 COLLECTOR 2 3 1 1 2 1 2 Regulator Schottky Diode Transistor ...

Page 44: ...SCHEMATIC DIAGRAM 43 1 TDA8752 PRE AMP PLL ADC ...

Page 45: ... 44 2 VIDEO PROCESS ...

Page 46: ... 45 3 PANEL LINK FOR 8 Bit ...

Page 47: ... 46 4 MEMORY ...

Page 48: ... 47 5 MICOM ...

Page 49: ... 48 6 POWER GEN ...

Page 50: ... 49 7 CONNECTOR JACKS ...

Page 51: ...PACKING AND ACCESSORIES 50 Signal Cable Owner s Manual Right Packing Left Packing Adaptor Power Cord Right Side Front Side ...

Page 52: ...Jul 2000 P NO 3828TSL024H Printed in Korea ...

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