1. Manuals
  2. Brands
  3. LG Manuals
  4. Monitor
  5. PFM42V1
  6. Service manual

LG PFM42V1 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : CL-50
MODEL: PFM42V1, PFM42V1A, PFM-42V1E
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

Advertisement

Table of Contents
loading

Related Manuals for LG PFM42V1

Summary of Contents for LG PFM42V1

  • Page 1 COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-50 MODEL: PFM42V1, PFM42V1A, PFM-42V1E CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 TROUBLESHOOTING GUIDE ......13 PRECAUTIONS ............3 WIRING DIAGRAM ..........26 TIMING CHART ............4 SCREW PART LIST..........27 OPERATING INSTRUCTIONS ........ 6 EXPLODED VIEW...........29 BLOCK DIAGRAM ........... 8 REPLACEMENT PARTS LIST .......31 DESCRIPTION OF BLOCK DIAGRAM....9 PIN CONFIGURATION ...........45 ADJUSTMENT ............12 SCHEMATIC DIAGRAM .........

  • Page 3: Precautions

    PRECAUTION WARNING FOR THE SAFETY-RELATED COMPONENT. CAUTION • There are some special components used in LCD Please use only a plastic screwdriver to protect yourself monitor that are important for safety. These parts are from shock hazard during service operation. marked on the schematic diagram and the replacement parts list.

  • Page 4: Timing Chart

    TIMING CHART VIDEO SYNC 1. PC MODE & COMPOSITE MODE << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Total Period Video Active Time Blanking time Back Porch Front Porch Sync Sync Duration Mode Resolution Frequency...
  • Page 5 Back Porch Front Porch Total Period Video Active Time Blanking time Sync Duration Sync Mode Frequency Resolution Polarity Clock Sort – 29.830 1056 31.500 848x480 59.659Hz 29.514 1008 29.750 848x480 – 59.745Hz – 37.684 1088 848x480 41.000 74.769Hz – 47.776 1664 1280 1280x768...

  • Page 6: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW CONTROL Button ~ AC IN Terminal Front Control Panel SPEAKER Socket REAR VIEW COMPOSITE AUDIO IN AUDIO RGB/YUV AUDIO AUDIO Y/C IN VIDEO INPUT 1 INPUT 2 CONTROLS REMOTE 1. VIDEO Connertors 3. INPUT2(DVI-D) Connertors The PFM-42V1E is not equipped with VIDEO DVI: Connects to the digital RGB signal output of a connectors.

  • Page 7: Front Control Panel

    Front Control Panel Bottom Control Panel MENU ENTER VOLUME (standby)switch 1. MENU button Press to power on the display unit. Press again to Press to show menus. Press again to hide them. return to the standby mode. buttons Note Press to move the cursor(yellow) to an item you To protect the panel, a certain amount of times is want to select or to adjust a value in a menu.

  • Page 8: Block Diagram

    BLOCK DIAGRAM(MAIN) Extender - 8 -...

  • Page 9: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Input selection circuit 6. DTV Circuit At BA7657F(IC4) Video signal selects between PC This block is composed of AD9888(IC12) and RGB signal and Component signal. peripheral devices Then selected output inputs to AD9888(IC12). AD9888(IC12) includes A/D converter, Pre-amp, and PLL.
  • Page 10 Block Diagram(Others) - 10 -...
  • Page 11 Block Diagram(Power) AC-Det Supervisory Relay-on an d Sequence Vs-on control 5V-Det Stand-by 5V Flyback con v. Voltage Regulator 26Vn et +14V Rectifer Input Voltage Regulator bridge 12Vaudio Filter +12V AC INPUT connection Voltage Regulator 9Vsc Voltage Regulator 5Vctrl 5Vsc Flyback con v. using a CSD +60V Flyback con v.

  • Page 12: Adjustment

    ADJUSTMENT 1. Procedures of how to go to service mode. 4. Warm up time 1) Enter the service mode of this unit by turning on the Warm up for 30 minutes before performing any power while pressing and holding the "↓" key adjustment.

  • Page 13: Troubleshooting Guide

    TROUBLESHOOTING GUIDE(MAIN) 1. OUT OF ORDER ON POWER NO POWER Check Fail Fail Replace Connector or Check 5V-ST 5V-ST Output the Power B’d CN9(Pin#3) On Power B’d Pass Pass Fail High Check Ctrl signal Check Check Device IC8 (Pin #6) Q35, IC8, IC3 CN9 (Pin#2) ‘RLY’...
  • Page 14 NO RASTER ON DIGITAL SIGNAL Repeat ‘A’ Process Pass Fail Rewrite EDID Check The Data EDID Data Check IC17(Sil161B) -H/V Sync -Output Clock -Output Data -Power Down Ctrl Signal (TMDSRX*-PDN) - 14 -...
  • Page 15 2. NO RASTER STATE NO RASTER ON ANALOG SIGNAL ‘A’ Process 3.3V Check *Check the Power Fail Check LED Check Ctrl signal IC44 Green 2.5V : 3.3VDD Status on Power Line Pin#32 *Replace Device Display Head IC21, IC45, (LVDS83) IC21 IC20, IC22, IC23, IC24 Pass...
  • Page 16 NO RASTER ON Y, Pb, Pr/Y,Cb Cr SIGNAL Repeat ‘A’ Process Input Select Input 1, Option Pass 480P 720P Pass 480i 1080i Check Fail Fail Check Replace Device Microvision Copy Replace Device Analog Switch DTV Q29, 30, 31, Protection & Input Select Q53, 54, 55, 50, 51, 52 IC4(BA7657) 23, 27, 28...
  • Page 17 NO RASTER ON AV SIGNAL (CVBS, S-VIDEO) Repeat ‘A’ Process Pass Check Fail * Check video signal CN7 Pin#14 AV1-CVBS Input Select for AV * Replace Device IC41(CXA2069) Pass * Check the power Fail Check (3.3VDD-UPD, 2.5VDD-UPD, 2.5VDD-UPD) 3D Comb Filter * Replace Device IC31(uPD64083) IC40, IC42, Q10, 11,14, 15, 16, 17...
  • Page 18 No Raster On analog Signal VS-Board Option #2 Input Input * Check CN201, CN202, CN203 Fail Check CN204,CN205 Input CN207(44Pin Wafer) A Process B12,B13,B14,B15,B16 * Check 5VST, 12V Fail Check * Check CN2 10Pin Signal connector R/G/B/H/V No Raster On Y, Pb, Pr/Y, Cb, Cr VS-Board Option #2 Input...
  • Page 19 3. SOUND TROUBLESHOOTING NO SOUND OUTPUT Check Connector Check Main B’d:CN12,CN14 Audio Process Video B’d:CN103 IC301(TA1343N) Option B’d:CN206 Fail * Check the Power (9V) Pass Pass * Replace Device IC301 * Check Audio Signal CN7 Check Fail Video & Option B’d : Pin#6,8 Check Audio Amp.

  • Page 20: Checking For No Picture

    TROUBLESHOOTING GUIDE(PDP) 1. Checking for no Picture A screen doesn’ t display at all and condition of black pattern or power off. (1) Check whether the CTRL B/D LED(D1~D4) is turned on or not. (2) Check the power and signal cable of CTRL B/D. (3) X B/D, Y B/D, Z B/D is well plugged in.
  • Page 21 <A : Y B/D Output wave - 1Frame> <B : Y B/D Output wave - 7~12 SF> <A : Z B/D Output wave - 1Frame> <B : Z B/D Output wave - 1SF> <X B/D Output wave - 1 FRAME> <X B/D Output wave - 1 SF>...
  • Page 22 2. Hitch Diagnosis Following Display Condition 2-1. 4/7 or 3/7 of the screen doesn t be 2-2. The screen doesn t be shown as Data shown (Include not be shown part of Data COF quantity or a part) (1) Confirm the power connector of X B/D is well plugged in which is correspond to not showing screen.
  • Page 23 2-3. It Generates Unusual Pattern of Data 2-4. Regular Stripe is Generated about the COF IC unit Quantity of one Data COF IC or more (1) In case of generating unusual pattern of Data COF IC unit (1) In case of generating regular stripe about the quantity of as below picture, there is problem in the check that is input one Data COF IC, there is problem at the output of output- into Data COF IC...
  • Page 24 2-5. The screen display has a problem for 2-6. The screen has a vertical line with Scan FFC. regular gap. (A vertical stripe flash at especial color) (1) It s may be a problem between Scan FFC and Y B/D. (2) Check the connection of Y B/D and Scan COF.
  • Page 25 2-8. The screen has one or several vertical 2-11. The screen displays other color line partially on full white screen or happens discharge partially on full black screen. (1) In this case, It isn t a problem about controller B/D or X B/D.

  • Page 26: Wiring Diagram

    Remote control - 26 -...

  • Page 27: Screw Part List

    - 27 -...
  • Page 28 - 28 -...
  • Page 29 - 29 -...

  • Page 30: Exploded View

    X-4042-306-1 3091TKE004A CABINET ASSEMBLY, PS420VA/PS420VAO/PS420VAA SONY E003 (SK) -(PFM42V1, PFM-42V1E, PFM42V1A) X-4042-097-1 3091TKE004B PDP, 42" 16:9 852*480 PDP42V50012.AKLGG(LVDS, FRAME FOR DID), FOR INTERCOMPANYY DOMESTIC-(PFM42V1, PFM-42V1E) 1-805-424-11 6348Q-E036C PDP, 42" 16:9 852*480 PDP42V50012.AKLGG-(PFM42V1A) 6348Q-E036U PWB(PCB) ASSEMBLY, DISPLAY YDRV ASSY HAND INSERT 42SD5_YDRV_TOTAL_T1_4LAYER...

  • Page 31: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 32 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C108 0CK473CK56A 47000PF 1608 50V 10% R/TP X7 C170 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C109 0CK392CK56A 3900PF 1608 50V 10% R/TP X7R...
  • Page 33 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C232 0CZZTAT006B RV2-16V220MU-R ELNA 16V 22UF C296 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C233 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 34 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C359 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C427 0CH3103K516 10000PF 50V 10% B(Y5P) 2012 C360 0CC470CK41A 47PF 1608 50V 5% R/TP NP0...
  • Page 35 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C497 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R 0DS226009AA KDS226 TP KEC SOT-23 80V 30 C500 0CH3105H946 “1UF 25V 80%,-20% F(Y5V) 2012”...
  • Page 36 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC23 0IPMGFA003B RC1117S-2.5 FAIRCHILD SOT-22 FB58 6210TCE001Z HH-1M2012-600JT CERATEC R/TP IC24 0IRH033200A BA033FP-E2 MOLD-3 TP REGULAT FB59 6210TCE001G HH-1M3216-501 CERATEC 3216MM...
  • Page 37 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0LC2000005F F1-C2012-562-KJT CERATECH R/ 0TR390609FA KST3906-MTF TP SAMSUNG SOT2 0LC2000005D “F1-B2012-332KJT,3.3 UH CERAT” 0TR390609FA KST3906-MTF TP SAMSUNG SOT2 0LC2000005D “F1-B2012-332KJT,3.3 UH CERAT”...
  • Page 38 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R106 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP 0RJ0102D677 10 OHM 1/10 W 5% 1608 R/TP R107...
  • Page 39 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R178 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP R252 0RH4700D622 470 1/10W 5 D.R/TP R179 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP...
  • Page 40 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R317 0RJ4702D677 47000 OHM 1/10 W 5% 1608 R/T R392 0RJ5600D677 560 OHM 1/10 W 5% 1608 R/TP R318 0RH5600D622 560 1/10W 5 D.R/TP...
  • Page 41 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R469 0RH0222D622 22 OHM 1 / 10 W 2012 5.00% D R555 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R470 0RH0222D622 22 OHM 1 / 10 W 2012 5.00% D...
  • Page 42 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RA63 0RHZTCZ001E RCA SMART 47OHM 1/16 W 5% 32 R122 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP RA64 0RHZTCZ001E RCA SMART 47OHM 1/16 W 5% 32...
  • Page 43 DATE: 2003. 09. 08. DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C310 0CQ2231N419 0.022UF 100V J PE NI TP R301 0RH4703D622 470K 1/10W 5 D.R/TP C311 0CZZTAT007G RE3-50V4R7ME3#-T2 ELNA 50V 4...
  • Page 44 DATE: 2003. 09. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION FB1303 6210TCE001B HH-1H3216-500JT CERATEC 3216 FB1304 6210TCE001B HH-1H3216-500JT CERATEC 3216 IC501 0IPRPNS030A LM35DZ NATIONAL SEMICONDUCTO R301 0RD4701Q609 4.70K 1/4W(3 5% TA52 R302 0RD4701Q609 4.70K 1/4W(3 5% TA52 R303 0RD4701Q609 4.70K 1/4W(3 5% TA52...

  • Page 45: Pin Configuration

    PIN CONFIGURATION SIL161BCT100 C O N T R O L S G PO E V E N 8-bits RE D Q O 2 Q E13 Q O 3 Q E12 Q O 4 Q E11 Q O 5 Q E10 Q O 6 Q E9 Q O 7...
  • Page 46 AD988KS-205 ANALOG PIN 1 REF BYPASS IDENTIFIER RMIDSCV SOGIN0 SOGIN1 AD9888 TOP VIEW (Not to Scale) BMIDSCV CKINV CLAMP PIN CONFIGURATION - 46 -...
  • Page 47 ACTIVITY SYNC SLICER DETECT SYNC SEPARATOR COMP MUX5 NEGATIVE PEAK INTEGRATOR SYNC CLAMP SOGIN0 VSYNC SOGIN1 MUX1 HSYNC0 SOGOUT HSYNC1 MUX5 ACTIVITY DETECT POLARITY DETECT HSYNCOUT PIXEL CLOCK CLOCK MUX2 GENERATOR COAST MUX3 POLARITY DETECT VSYNC0 VSYNCOUT VSYNC1 MUX5 ACTIVITY POLARITY MUX4 DETECT...

  • Page 48: Schematic Diagram

    SCHEMATIC DIAGRAM 1. DSUB & AD9888 - 48 -...
  • Page 49 2. SCALER(ASI510) - 49 -...
  • Page 50 3. MEMORY - 50 -...
  • Page 51 4. FLI2310 - 51 -...
  • Page 52 5. VPC3230D - 52 -...
  • Page 53 6. CXA2171AQ/BA7657/CONNECTOR - 53 -...
  • Page 54 7. MICOM - 54 -...
  • Page 55 8. POWER - 55 -...
  • Page 56 9. AUDIO - 56 -...
  • Page 57 10. OPTION - 57 -...
  • Page 58 Sep. 2003 P/NO : 3828TSO063A Printed in Korea...

This manual is also suitable for:

Pfm42v1aPfm-42v1e

Table of Contents